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• IIS 7, Asp.Net 4: Server cannot append header after HTTP headers have been sent?

  - by Amitabh

  I am getting the following warnings on the Event Log for a Asp.Net WebSite running on IIS 7. Exception information: Exception type: HttpException Exception message: Server cannot append header after HTTP headers have been sent. at System.Web.Hosting.ISAPIWorkerRequest.SendUnknownResponseHeader(String name, String value) at System.Web.HttpResponse.WriteHeaders() at System.Web.HttpResponse.Flush(Boolean finalFlush) at System.Web.HttpRuntime.FinishRequest(HttpWorkerRequest wr, HttpContext context, Exception e) I tried to debug the WebSite but it just does not show in debugger. The web page which has got this issue contains the following. Its a content page with a Master page. It has a grid inside an UpdatePanel which is Triggered by a Timer. On the specified time grid data is refreshed. Everytime this happens we see a new warning in the EventLog. What is the best way to go about this issue?

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• Visual studio 2010 remote debugging is very slow (across domains, over vpn)

  - by alex

  Overall debugging works, but each step through code takes dosens of seconds. I've already closed all additional windows like stack trace,watches,autos; deleted all breakpoints. server and dev machine are located in different domains, so i set up local user on both, with matching password. remote debugger is running as service. looking at security log, I found quite a lot of entries about remote debugging account logging in (record about every minute). Any suggestions on how i can speed up remote debugging? dev computer: quad core, 8 Gb mem, win 7 x64 , visual studio 2010 ultimate target server: asp.net website , 2xdual core xeon, 2Gb mem, remote debugger 2010 communication channel: vpn , 5 mbit , latency about 20ms. (seems that debbugging never uses more than 20 kb/s)

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• Problems with calendar application on Android 2.1

  - by Rick

  Hi, I have compiled the android 2.1 source code and I can start the emulator. But I can't launch calendar application. Every time I tried to lauch the calendar application, it crashed. The log is as following: // CRASH: com.android.calendar (pid 272) // Short Msg: java.lang.NullPointerException // Long Msg: java.lang.NullPointerException // Build Label: android:generic/generic/generic/:2.1-update1/ERE27/eng.root.20100317.113135:eng/test-keys // Build Changelist: -1 // Build Time: 1268798948 // ID: // Tag: AndroidRuntime // java.lang.NullPointerException: // at com.android.providers.calendar.CalendarSyncAdapter.onAccountsChanged(CalendarSyncAdapter.java:1400) // at android.content.AbstractSyncableContentProvider$1.onAccountsUpdated(AbstractSyncableContentProvider.java:189) // at android.accounts.AccountManager$10.run(AccountManager.java:826) // at android.os.Handler.handleCallback(Handler.java:587) // at android.os.Handler.dispatchMessage(Handler.java:92) // at android.os.Looper.loop(Looper.java:123) // at android.app.ActivityThread.main(ActivityThread.java:4363) // at java.lang.reflect.Method.invokeNative(Method.java:-2) // at java.lang.reflect.Method.invoke(Method.java:521) // at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) // at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) // at dalvik.system.NativeStart.main(NativeStart.java:-2) has anyone met this problem, or any suggestions on how to fix it? Thanks very much!! Rick

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• JMS Step 6 - How to Set Up an AQ JMS (Advanced Queueing JMS) for SOA Purposes

  - by John-Brown.Evans

  JMS Step 6 - How to Set Up an AQ JMS (Advanced Queueing JMS) for SOA Purposes .jblist{list-style-type:disc;margin:0;padding:0;padding-left:0pt;margin-left:36pt} ol{margin:0;padding:0} .c17_6{vertical-align:top;width:468pt;border-style:solid;border-color:#000000;border-width:1pt;padding:5pt 5pt 5pt 5pt} .c5_6{vertical-align:top;border-style:solid;border-color:#000000;border-width:1pt;padding:0pt 5pt 0pt 5pt} .c6_6{vertical-align:top;width:156pt;border-style:solid;border-color:#000000;border-width:1pt;padding:5pt 5pt 5pt 5pt} .c15_6{background-color:#ffffff} .c10_6{color:#1155cc;text-decoration:underline} .c1_6{text-align:center;direction:ltr} .c0_6{line-height:1.0;direction:ltr} .c16_6{color:#666666;font-size:12pt} .c18_6{color:inherit;text-decoration:inherit} .c8_6{background-color:#f3f3f3} .c2_6{direction:ltr} .c14_6{font-size:8pt} .c11_6{font-size:10pt} .c7_6{font-weight:bold} .c12_6{height:0pt} .c3_6{height:11pt} .c13_6{border-collapse:collapse} .c4_6{font-family:"Courier New"} .c9_6{font-style:italic} .title{padding-top:24pt;line-height:1.15;text-align:left;color:#000000;font-size:36pt;font-family:"Arial";font-weight:bold;padding-bottom:6pt} .subtitle{padding-top:18pt;line-height:1.15;text-align:left;color:#666666;font-style:italic;font-size:24pt;font-family:"Georgia";padding-bottom:4pt} li{color:#000000;font-size:10pt;font-family:"Arial"} p{color:#000000;font-size:10pt;margin:0;font-family:"Arial"} h1{padding-top:0pt;line-height:1.15;text-align:left;color:#888;font-size:24pt;font-family:"Arial";font-weight:normal} h2{padding-top:0pt;line-height:1.15;text-align:left;color:#888;font-size:18pt;font-family:"Arial";font-weight:normal} h3{padding-top:0pt;line-height:1.15;text-align:left;color:#888;font-size:14pt;font-family:"Arial";font-weight:normal} h4{padding-top:0pt;line-height:1.15;text-align:left;color:#888;font-size:12pt;font-family:"Arial";font-weight:normal} h5{padding-top:0pt;line-height:1.15;text-align:left;color:#888;font-size:11pt;font-family:"Arial";font-weight:normal} h6{padding-top:0pt;line-height:1.15;text-align:left;color:#888;font-size:10pt;font-family:"Arial";font-weight:normal} This post continues the series of JMS articles which demonstrate how to use JMS queues in a SOA context. The previous posts were: JMS Step 1 - How to Create a Simple JMS Queue in Weblogic Server 11g JMS Step 2 - Using the QueueSend.java Sample Program to Send a Message to a JMS Queue JMS Step 3 - Using the QueueReceive.java Sample Program to Read a Message from a JMS Queue JMS Step 4 - How to Create an 11g BPEL Process Which Writes a Message Based on an XML Schema to a JMS Queue JMS Step 5 - How to Create an 11g BPEL Process Which Reads a Message Based on an XML Schema from a JMS Queue This example leads you through the creation of an Oracle database Advanced Queue and the related WebLogic server objects in order to use AQ JMS in connection with a SOA composite. If you have not already done so, I recommend you look at the previous posts in this series, as they include steps which this example builds upon. The following examples will demonstrate how to write and read from the queue from a SOA process. 1. Recap and Prerequisites In the previous examples, we created a JMS Queue, a Connection Factory and a Connection Pool in the WebLogic Server Console. Then we wrote and deployed BPEL composites, which enqueued and dequeued a simple XML payload. AQ JMS allows you to interoperate with database Advanced Queueing via JMS in WebLogic server and therefore take advantage of database features, while maintaining compliance with the JMS architecture. AQ JMS uses the WebLogic JMS Foreign Server framework. A full description of this functionality can be found in the following Oracle documentation Oracle® Fusion Middleware Configuring and Managing JMS for Oracle WebLogic Server 11g Release 1 (10.3.6) Part Number E13738-06 7. Interoperating with Oracle AQ JMS http://docs.oracle.com/cd/E23943_01/web.1111/e13738/aq_jms.htm#CJACBCEJ For easier reference, this sample will use the same names for the objects as in the above document, except for the name of the database user, as it is possible that this user already exists in your database. We will create the following objects Database Objects Name Type AQJMSUSER Database User MyQueueTable Advanced Queue (AQ) Table UserQueue Advanced Queue WebLogic Server Objects Object Name Type JNDI Name aqjmsuserDataSource Data Source jdbc/aqjmsuserDataSource AqJmsModule JMS System Module AqJmsForeignServer JMS Foreign Server AqJmsForeignServerConnectionFactory JMS Foreign Server Connection Factory AqJmsForeignServerConnectionFactory AqJmsForeignDestination AQ JMS Foreign Destination queue/USERQUEUE eis/aqjms/UserQueue Connection Pool eis/aqjms/UserQueue 2. Create a Database User and Advanced Queue The following steps can be executed in the database client of your choice, e.g. JDeveloper or SQL Developer. The examples below use SQL*Plus. Log in to the database as a DBA user, for example SYSTEM or SYS. Create the AQJMSUSER user and grant privileges to enable the user to create AQ objects. Create Database User and Grant AQ Privileges sqlplus system/password as SYSDBA GRANT connect, resource TO aqjmsuser IDENTIFIED BY aqjmsuser; GRANT aq_user_role TO aqjmsuser; GRANT execute ON sys.dbms_aqadm TO aqjmsuser; GRANT execute ON sys.dbms_aq TO aqjmsuser; GRANT execute ON sys.dbms_aqin TO aqjmsuser; GRANT execute ON sys.dbms_aqjms TO aqjmsuser; Create the Queue Table and Advanced Queue and Start the AQ The following commands are executed as the aqjmsuser database user. Create the Queue Table connect aqjmsuser/aqjmsuser; BEGIN dbms_aqadm.create_queue_table ( queue_table = 'myQueueTable', queue_payload_type = 'sys.aq$_jms_text_message', multiple_consumers = false ); END; / Create the AQ BEGIN dbms_aqadm.create_queue ( queue_name = 'userQueue', queue_table = 'myQueueTable' ); END; / Start the AQ BEGIN dbms_aqadm.start_queue ( queue_name = 'userQueue'); END; / The above commands can be executed in a single PL/SQL block, but are shown as separate blocks in this example for ease of reference. You can verify the queue by executing the SQL command SELECT object_name, object_type FROM user_objects; which should display the following objects: OBJECT_NAME OBJECT_TYPE ------------------------------ ------------------- SYS_C0056513 INDEX SYS_LOB0000170822C00041$$ LOB SYS_LOB0000170822C00040$$ LOB SYS_LOB0000170822C00037$$ LOB AQ$_MYQUEUETABLE_T INDEX AQ$_MYQUEUETABLE_I INDEX AQ$_MYQUEUETABLE_E QUEUE AQ$_MYQUEUETABLE_F VIEW AQ$MYQUEUETABLE VIEW MYQUEUETABLE TABLE USERQUEUE QUEUE Similarly, you can view the objects in JDeveloper via a Database Connection to the AQJMSUSER. 3. Configure WebLogic Server and Add JMS Objects All these steps are executed from the WebLogic Server Administration Console. Log in as the webLogic user. Configure a WebLogic Data Source The data source is required for the database connection to the AQ created above. Navigate to domain > Services > Data Sources and press New then Generic Data Source. Use the values:Name: aqjmsuserDataSource JNDI Name: jdbc/aqjmsuserDataSource Database type: Oracle Database Driver: *Oracle’ Driver (Thin XA) for Instance connections; Versions:9.0.1 and later Connection Properties: Enter the connection information to the database containing the AQ created above and enter aqjmsuser for the User Name and Password. Press Test Configuration to verify the connection details and press Next. Target the data source to the soa server. The data source will be displayed in the list. It is a good idea to test the data source at this stage. Click on aqjmsuserDataSource, select Monitoring > Testing > soa_server1 and press Test Data Source. The result is displayed at the top of the page. Configure a JMS System Module The JMS system module is required to host the JMS foreign server for AQ resources. Navigate to Services > Messaging > JMS Modules and select New. Use the values: Name: AqJmsModule (Leave Descriptor File Name and Location in Domain empty.) Target: soa_server1 Click Finish. The other resources will be created in separate steps. The module will be displayed in the list.   Configure a JMS Foreign Server A foreign server is required in order to reference a 3rd-party JMS provider, in this case the database AQ, within a local WebLogic server JNDI tree. Navigate to Services > Messaging > JMS Modules and select (click on) AqJmsModule to configure it. Under Summary of Resources, select New then Foreign Server. Name: AqJmsForeignServer Targets: The foreign server is targeted automatically to soa_server1, based on the JMS module’s target. Press Finish to create the foreign server. The foreign server resource will be listed in the Summary of Resources for the AqJmsModule, but needs additional configuration steps. Click on AqJmsForeignServer and select Configuration > General to complete the configuration: JNDI Initial Context Factory: oracle.jms.AQjmsInitialContextFactory JNDI Connection URL: <empty> JNDI Properties Credential:<empty> Confirm JNDI Properties Credential: <empty> JNDI Properties: datasource=jdbc/aqjmsuserDataSource This is an important property. It is the JNDI name of the data source created above, which points to the AQ schema in the database and must be entered as a name=value pair, as in this example, e.g. datasource=jdbc/aqjmsuserDataSource, including the “datasource=” property name. Default Targeting Enabled: Leave this value checked. Press Save to save the configuration. At this point it is a good idea to verify that the data source was written correctly to the config file. In a terminal window, navigate to $MIDDLEWARE_HOME/user_projects/domains/soa_domain/config/jms  and open the file aqjmsmodule-jms.xml . The foreign server configuration should contain the datasource name-value pair, as follows:   <foreign-server name="AqJmsForeignServer">         <default-targeting-enabled>true</default-targeting-enabled>         <initial-context-factory>oracle.jms.AQjmsInitialContextFactory</initial-context-factory>         <jndi-property>           <key> datasource </key>           <value> jdbc/aqjmsuserDataSource </value>         </jndi-property>   </foreign-server> </weblogic-jms> Configure a JMS Foreign Server Connection Factory When creating the foreign server connection factory, you enter local and remote JNDI names. The name of the connection factory itself and the local JNDI name are arbitrary, but the remote JNDI name must match a specific format, depending on the type of queue or topic to be accessed in the database. This is very important and if the incorrect value is used, the connection to the queue will not be established and the error messages you get will not immediately reflect the cause of the error. The formats required (Remote JNDI names for AQ JMS Connection Factories) are described in the section Configure AQ Destinations  of the Oracle® Fusion Middleware Configuring and Managing JMS for Oracle WebLogic Server document mentioned earlier. In this example, the remote JNDI name used is   XAQueueConnectionFactory  because it matches the AQ and data source created earlier, i.e. thin with AQ. Navigate to JMS Modules > AqJmsModule > AqJmsForeignServer > Connection Factories then New.Name: AqJmsForeignServerConnectionFactory Local JNDI Name: AqJmsForeignServerConnectionFactory Note: this local JNDI name is the JNDI name which your client application, e.g. a later BPEL process, will use to access this connection factory. Remote JNDI Name: XAQueueConnectionFactory Press OK to save the configuration. Configure an AQ JMS Foreign Server Destination A foreign server destination maps the JNDI name on the foreign JNDI provider to the respective local JNDI name, allowing the foreign JNDI name to be accessed via the local server. As with the foreign server connection factory, the local JNDI name is arbitrary (but must be unique), but the remote JNDI name must conform to a specific format defined in the section Configure AQ Destinations  of the Oracle® Fusion Middleware Configuring and Managing JMS for Oracle WebLogic Server document mentioned earlier. In our example, the remote JNDI name is Queues/USERQUEUE , because it references a queue (as opposed to a topic) with the name USERQUEUE. We will name the local JNDI name queue/USERQUEUE, which is a little confusing (note the missing “s” in “queue), but conforms better to the JNDI nomenclature in our SOA server and also allows us to differentiate between the local and remote names for demonstration purposes. Navigate to JMS Modules > AqJmsModule > AqJmsForeignServer > Destinations and select New.Name: AqJmsForeignDestination Local JNDI Name: queue/USERQUEUE Remote JNDI Name:Queues/USERQUEUE After saving the foreign destination configuration, this completes the JMS part of the configuration. We still need to configure the JMS adapter in order to be able to access the queue from a BPEL processt. 4. Create a JMS Adapter Connection Pool in Weblogic Server Create the Connection Pool Access to the AQ JMS queue from a BPEL or other SOA process in our example is done via a JMS adapter. To enable this, the JmsAdapter in WebLogic server needs to be configured to have a connection pool which points to the local connection factory JNDI name which was created earlier. Navigate to Deployments > Next and select (click on) the JmsAdapter. Select Configuration > Outbound Connection Pools and New. Check the radio button for oracle.tip.adapter.jms.IJmsConnectionFactory and press Next. JNDI Name: eis/aqjms/UserQueue Press Finish Expand oracle.tip.adapter.jms.IJmsConnectionFactory and click on eis/aqjms/UserQueue to configure it. The ConnectionFactoryLocation must point to the foreign server’s local connection factory name created earlier. In our example, this is AqJmsForeignServerConnectionFactory . As a reminder, this connection factory is located under JMS Modules > AqJmsModule > AqJmsForeignServer > Connection Factories and the value needed here is under Local JNDI Name. Enter AqJmsForeignServerConnectionFactory  into the Property Value field for ConnectionFactoryLocation. You must then press Return/Enter then Save for the value to be accepted. If your WebLogic server is running in Development mode, you should see the message that the changes have been activated and the deployment plan successfully updated. If not, then you will manually need to activate the changes in the WebLogic server console.Although the changes have been activated, the JmsAdapter needs to be redeployed in order for the changes to become effective. This should be confirmed by the message Remember to update your deployment to reflect the new plan when you are finished with your changes. Redeploy the JmsAdapter Navigate back to the Deployments screen, either by selecting it in the left-hand navigation tree or by selecting the “Summary of Deployments” link in the breadcrumbs list at the top of the screen. Then select the checkbox next to JmsAdapter and press the Update button. On the Update Application Assistant page, select “Redeploy this application using the following deployment files” and press Finish. After a few seconds you should get the message that the selected deployments were updated. The JMS adapter configuration is complete and it can now be used to access the AQ JMS queue. You can verify that the JNDI name was created correctly, by navigating to Environment > Servers > soa_server1 and View JNDI Tree. Then scroll down in the JNDI Tree Structure to eis and select aqjms. This concludes the sample. In the following post, I will show you how to create a BPEL process which sends a message to this advanced queue via JMS. Best regards John-Brown Evans Oracle Technology Proactive Support Delivery

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• New MySQL Cluster 7.3 Previews: Foreign Keys, NoSQL Node.js API and Auto-Tuned Clusters

  - by Mat Keep

  At this weeks MySQL Connect conference, Oracle previewed an exciting new wave of developments for MySQL Cluster, further extending its simplicity and flexibility by expanding the range of use-cases, adding new NoSQL options, and automating configuration. What’s new: Development Release 1: MySQL Cluster 7.3 with Foreign Keys Early Access “Labs” Preview: MySQL Cluster NoSQL API for Node.js Early Access “Labs” Preview: MySQL Cluster GUI-Based Auto-Installer In this blog, I'll introduce you to the features being previewed. Review the blogs listed below for more detail on each of the specific features discussed. Save the date!: A live webinar is scheduled for Thursday 25th October at 0900 Pacific Time / 1600UTC where we will discuss each of these enhancements in more detail. Registration will be open soon and published to the MySQL webinars page MySQL Cluster 7.3: Development Release 1 The first MySQL Cluster 7.3 Development Milestone Release (DMR) previews Foreign Keys, bringing powerful new functionality to MySQL Cluster while eliminating development complexity. Foreign Key support has been one of the most requested enhancements to MySQL Cluster – enabling users to simplify their data models and application logic – while extending the range of use-cases for both custom projects requiring referential integrity and packaged applications, such as eCommerce, CRM, CMS, etc. Implementation The Foreign Key functionality is implemented directly within the MySQL Cluster data nodes, allowing any client API accessing the cluster to benefit from them – whether they are SQL or one of the NoSQL interfaces (Memcached, C++, Java, JPA, HTTP/REST or the new Node.js API - discussed later.) The core referential actions defined in the SQL:2003 standard are implemented: CASCADE RESTRICT NO ACTION SET NULL In addition, the MySQL Cluster implementation supports the online adding and dropping of Foreign Keys, ensuring the Cluster continues to serve both read and write requests during the operation.  This represents a further enhancement to MySQL Cluster's support for on0line schema changes, ie adding and dropping indexes, adding columns, etc.  Read this blog for a demonstration of using Foreign Keys with MySQL Cluster.  Getting Started with MySQL Cluster 7.3 DMR1: Users can download either the source or binary and evaluate the MySQL Cluster 7.3 DMR with Foreign Keys now! (Select the Development Release tab). MySQL Cluster NoSQL API for Node.js Node.js is hot! In a little over 3 years, it has become one of the most popular environments for developing next generation web, cloud, mobile and social applications. Bringing JavaScript from the browser to the server, the design goal of Node.js is to build new real-time applications supporting millions of client connections, serviced by a single CPU core. Making it simple to further extend the flexibility and power of Node.js to the database layer, we are previewing the Node.js Javascript API for MySQL Cluster as an Early Access release, available for download now from http://labs.mysql.com/. Select the following build: MySQL-Cluster-NoSQL-Connector-for-Node-js Alternatively, you can clone the project at the MySQL GitHub page.  Implemented as a module for the V8 engine, the new API provides Node.js with a native, asynchronous JavaScript interface that can be used to both query and receive results sets directly from MySQL Cluster, without transformations to SQL. Figure 1: MySQL Cluster NoSQL API for Node.js enables end-to-end JavaScript development Rather than just presenting a simple interface to the database, the Node.js module integrates the MySQL Cluster native API library directly within the web application itself, enabling developers to seamlessly couple their high performance, distributed applications with a high performance, distributed, persistence layer delivering 99.999% availability. The new Node.js API joins a rich array of NoSQL interfaces available for MySQL Cluster. Whichever API is chosen for an application, SQL and NoSQL can be used concurrently across the same data set, providing the ultimate in developer flexibility.  Get started with MySQL Cluster NoSQL API for Node.js tutorial MySQL Cluster GUI-Based Auto-Installer Compatible with both MySQL Cluster 7.2 and 7.3, the Auto-Installer makes it simple for DevOps teams to quickly configure and provision highly optimized MySQL Cluster deployments – whether on-premise or in the cloud. Implemented with a standard HTML GUI and Python-based web server back-end, the Auto-Installer intelligently configures MySQL Cluster based on application requirements and auto-discovered hardware resources Figure 2: Automated Tuning and Configuration of MySQL Cluster Developed by the same engineering team responsible for the MySQL Cluster database, the installer provides standardized configurations that make it simple, quick and easy to build stable and high performance clustered environments. The auto-installer is previewed as an Early Access release, available for download now from http://labs.mysql.com/, by selecting the MySQL-Cluster-Auto-Installer build. You can read more about getting started with the MySQL Cluster auto-installer here. Watch the YouTube video for a demonstration of using the MySQL Cluster auto-installer Getting Started with MySQL Cluster If you are new to MySQL Cluster, the Getting Started guide will walk you through installing an evaluation cluster on a singe host (these guides reflect MySQL Cluster 7.2, but apply equally well to 7.3 and the Early Access previews). Or use the new MySQL Cluster Auto-Installer! Download the Guide to Scaling Web Databases with MySQL Cluster (to learn more about its architecture, design and ideal use-cases). Post any questions to the MySQL Cluster forum where our Engineering team and the MySQL Cluster community will attempt to assist you. Post any bugs you find to the MySQL bug tracking system (select MySQL Cluster from the Category drop-down menu) And if you have any feedback, please post them to the Comments section here or in the blogs referenced in this article. Summary MySQL Cluster 7.2 is the GA, production-ready release of MySQL Cluster. The first Development Release of MySQL Cluster 7.3 and the Early Access previews give you the opportunity to preview and evaluate future developments in the MySQL Cluster database, and we are very excited to be able to share that with you. Let us know how you get along with MySQL Cluster 7.3, and other features that you want to see in future releases, by using the comments of this blog.

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• Global ignore pattern for TortoiseSVN / Visual Studio 2010

  - by Chris Simmons

  After installing and using Visual Studio 2010, I'm seeing some newer file types (at least with C++ projects ... don't know about the other types) as compared to 2008. e.g. .sdf, .opensdf, which I guess are the replacement for ncb files with Intellisense info stored in SQL Server Compact files? I also notice .log files are generated, which appear to be build logs. Given this, what's safe to add to my global ignore pattern? Off the bat, I'd assume .sdf, .opensdf, but what else?

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• New Product: Oracle Java ME Embedded 3.2 – Small, Smart, Connected

  - by terrencebarr

  The Internet of Things (IoT) is coming. And, with todays launch of the Oracle Java ME Embedded 3.2 product, Java is going to play an even greater role in it. Java in the Internet of Things By all accounts, intelligent embedded devices are penetrating the world around us – driving industrial processes, monitoring environmental conditions, providing better health care, analyzing and processing data, and much more. And these devices are becoming increasingly connected, adding another dimension of utility. Welcome to the Internet of Things. As I blogged yesterday, this is a huge opportunity for the Java technology and ecosystem. To enable and utilize these billions of devices effectively you need a programming model, tools, and protocols which provide a feature-rich, consistent, scalable, manageable, and interoperable platform.  Java technology is ideally suited to address these technical and business problems, enabling you eliminate many of the typical challenges in designing embedded solutions. By using Java you can focus on building smarter, more valuable embedded solutions faster. To wit, Java technology is already powering around 10 billion devices worldwide. Delivering on this vision and accelerating the growth of embedded Java solutions, Oracle is today announcing a brand-new product: Oracle Java Micro Edition (ME) Embedded 3.2, accompanied by an update release of the Java ME Software Development Kit (SDK) to version 3.2. What is Oracle Java ME Embedded 3.2? Oracle Java ME Embedded 3.2 is a complete Java runtime client, optimized for ARM architecture connected microcontrollers and other resource-constrained systems. The product provides dedicated embedded functionality and is targeted for low-power, limited memory devices requiring support for a range of network services and I/O interfaces.  What features and APIs are provided by Oracle Java ME Embedded 3.2? Oracle Java ME Embedded 3.2 is a Java ME runtime based on CLDC 1.1 (JSR-139) and IMP-NG (JSR-228). The runtime and virtual machine (VM) are highly optimized for embedded use. Also included in the product are the following optional JSRs and Oracle APIs: File I/O API’s (JSR-75)  Wireless Messaging API’s (JSR-120) Web Services (JSR-172) Security and Trust Services subset (JSR-177) Location API’s (JSR-179) XML API’s (JSR-280)  Device Access API Application Management System (AMS) API AccessPoint API Logging API Additional embedded features are: Remote application management system Support for continuous 24×7 operation Application monitoring, auto-start, and system recovery Application access to peripheral interfaces such as GPIO, I2C, SPIO, memory mapped I/O Application level logging framework, including option for remote logging Headless on-device debugging – source level Java application debugging over IP Connection Remote configuration of the Java VM What type of platforms are targeted by Oracle Java ME 3.2 Embedded? The product is designed for embedded, always-on, resource-constrained, headless (no graphics/no UI), connected (wired or wireless) devices with a variety of peripheral I/O.  The high-level system requirements are as follows: System based on ARM architecture SOCs Memory footprint (approximate) from 130 KB RAM/350KB ROM (for a minimal, customized configuration) to 700 KB RAM/1500 KB ROM (for the full, standard configuration)  Very simple embedded kernel, or a more capable embedded OS/RTOS At least one type of network connection (wired or wireless) The initial release of the product is delivered as a device emulation environment for x86/Windows desktop computers, integrated with the Java ME SDK 3.2. A standard binary of Oracle Java ME Embedded 3.2 for ARM KEIL development boards based on ARM Cortex M-3/4 (KEIL MCBSTM32F200 using ST Micro SOC STM32F207IG) will soon be available for download from the Oracle Technology Network (OTN).  What types of applications can I develop with Oracle Java ME Embedded 3.2? The Oracle Java ME Embedded 3.2 product is a full-featured embedded Java runtime supporting applications based on the IMP-NG application model, which is derived from the well-known MIDP 2 application model. The runtime supports execution of multiple concurrent applications, remote application management, versatile connectivity, and a rich set of APIs and features relevant for embedded use cases, including the ability to interact with peripheral I/O directly from Java applications. This rich feature set, coupled with familiar and best-in class software development tools, allows developers to quickly build and deploy sophisticated embedded solutions for a wide range of use cases. Target markets well supported by Oracle Java ME Embedded 3.2 include wireless modules for M2M, industrial and building control, smart grid infrastructure, home automation, and environmental sensors and tracking. What tools are available for embedded application development for Oracle Java ME Embedded 3.2? Along with the release of Oracle Java ME Embedded 3.2, Oracle is also making available an updated version of the Java ME Software Development Kit (SDK), together with plug-ins for the NetBeans and Eclipse IDEs, to deliver a complete development environment for embedded application development.  OK – sounds great! Where can I find out more? And how do I get started? There is a complete set of information, data sheet, API documentation, “Getting Started Guide”, FAQ, and download links available: For an overview of Oracle Embeddable Java, see here. For the Oracle Java ME Embedded 3.2 press release, see here. For the Oracle Java ME Embedded 3.2 data sheet, see here. For the Oracle Java ME Embedded 3.2 landing page, see here. For the Oracle Java ME Embedded 3.2 documentation page, including a “Getting Started Guide” and FAQ, see here. For the Oracle Java ME SDK 3.2 landing and download page, see here. Finally, to ask more questions, please see the OTN “Java ME Embedded” forum To get started, grab the “Getting Started Guide” and download the Java ME SDK 3.2, which includes the Oracle Java ME Embedded 3.2 device emulation.  Can I learn more about Oracle Java ME Embedded 3.2 at JavaOne and/or Java Embedded @ JavaOne? Glad you asked Both conferences, JavaOne and Java Embedded @ JavaOne, will feature a host of content and information around the new Oracle Java ME Embedded 3.2 product, from technical and business sessions, to hands-on tutorials, and demos. Stay tuned, I will post details shortly. Cheers, – Terrence Filed under: Mobile & Embedded Tagged: "Oracle Java ME Embedded", Connected, embedded, Embedded Java, Java Embedded @ JavaOne, JavaOne, Smart

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• IIS6 - 301 permanent redirect response accessing an asp.net web site

  - by omatrot

  I've installed an ASP.NET 2.0 virtual directory application on the default web site in IIS6 (Windows 2003 computer) with a Visual Studio generated web deployment setup. Unfortunately, following a successfull installation, I'm unable to access our web site. I get a permanent redirect from IIS as shown in the log below : 2010-02-25 15:32:41 W3SVC1 127.0.0.1 GET /naweb3 - 80 - 127.0.0.1 Mozilla/4.0+(compatible;+MSIE+8.0;+Windows+NT+5.2;+Trident/4.0;+.NET+CLR+1.1.4322;+.NET+CLR+2.0.50727;+.NET+CLR+3.0.04506.30;+.NET+CLR+3.0.4506.2152;+.NET+CLR+3.5.30729) 301 0 0 This is the first time I have this kind of problem. Before I go with completely resetting IIS6 on this machine, I'm wondering what could cause this problem. The virtual directory configuration seems fine to me, no redirection at all at this level. Any help appreciated. TIA.

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• JPA/Hibernate and MySQL transaction isolation level

  - by armandino

  I have a native query that does a batch insert into a MySQL database: String sql = "insert into t1 (a, b) select x, y from t2 where x = 'foo'"; EntityTransaction tx = entityManager.getTransaction(); try { tx.begin(); int rowCount = entityManager.createNativeQuery(sql).executeUpdate(); tx.commit(); return rowCount; } catch(Exception ex) { tx.rollback(); log.error(...); } This query causes a deadlock: while it reads from t2 with insert .. select, another process tries to insert a row into t2. I don't care about the consistency of reads from t2 when doing an insert .. select and want to set the transaction isolation level to READ_UNCOMMITTED. How do I go about setting it in JPA backed by Hibernate?

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• Android Handler postDelayed executes twice

  - by Ömer Baykal

  When I use Handler and its postDelayed method, the run() method executes twice. Below is part of my code. Handler deneme = new Handler(); deneme.postDelayed(new Runnable() { @Override public void run() { randomOyna(); } }, 1000); where randomOyna is the method public void randomOyna() { Log.v("sonOlarak", "çalisti"); } I monitor the LogCat and see that "çalisti" entry is written twice, so that randomOyna is called twice. The task is scheduled truely, but executes both after 1 sec and 2 secs. Can you help me???

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• How to trace WCF serialization issues / exceptions

  - by Fabiano

  Hi I occasionally run into the problem that an application exception is thrown during the WCF-serialization (after returning a DataContract from my OperationContract). The only (and less meaningfull) message I get is System.ServiceModel.CommunicationException : The underlying connection was closed: The connection was closed unexpectedly. without any insight to the inner exception, which makes it really hard to find out what caused the error during serialization. Does someone know a good way how you can trace, log and debug these exceptions? Or even better can I catch the exception, handle them and send a defined FaulMessage to the client? thank you

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• iPhone Store Kit "Cannot connect to iTunes Store"

  - by lucasharding

  Hi, I am working on adding In-App purchases to my app. I am able to receive the productsRequest:didReceiveResponse method, and receive the array of products. My problem arises when I add a SKPayment to the SKPaymentQueue. After I add the product to the queue, in the paymentQueue:updatedTransactions method the transactions always have the state SKPaymentTransactionStateFailed. I NSLog the "transaction.error" and this is what it returns: Error Domain=SKErrorDomain Code=0 UserInfo=0x165000 "Cannot connect to iTunes Store" I have logged out of the Store in the Settings app, but after trying to purchase a product in my app it never asks me to log in with my test account. It just fails with the above error. Thanks in advance.

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• Django not recognizing django admin urls

  - by colorfulgrayscale

  I just registered my models my models with django admin. I navigate to the django admin at /admin. I log in sucessfully and I can see all my models. great so far. But now if I try to click one of the links, for Ex: 'users', django gives me a 404 saying The current URL, admin/auth/user/, didn't match any of these. Its really weird because in my urls.py I have it mapped correctly (r'^admin/', include(admin.site.urls)), I have all the required middleware enabled and have these in my installed apps 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.sites', 'django.contrib.messages', 'django.contrib.admin', anyone have any idea? Thanks.

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• JMS Step 7 - How to Write to an AQ JMS (Advanced Queueing JMS) Queue from a BPEL Process

  - by John-Brown.Evans

  JMS Step 7 - How to Write to an AQ JMS (Advanced Queueing JMS) Queue from a BPEL Process ol{margin:0;padding:0} .jblist{list-style-type:disc;margin:0;padding:0;padding-left:0pt;margin-left:36pt} .c4_7{vertical-align:top;width:468pt;border-style:solid;border-color:#000000;border-width:1pt;padding:5pt 5pt 5pt 5pt} .c3_7{vertical-align:top;width:234pt;border-style:solid;border-color:#000000;border-width:1pt;padding:0pt 5pt 0pt 5pt} .c6_7{vertical-align:top;width:156pt;border-style:solid;border-color:#000000;border-width:1pt;padding:5pt 5pt 5pt 5pt} .c16_7{background-color:#ffffff;padding:0pt 0pt 0pt 0pt} .c0_7{height:11pt;direction:ltr} .c9_7{color:#1155cc;text-decoration:underline} .c17_7{color:inherit;text-decoration:inherit} .c5_7{direction:ltr} .c18_7{background-color:#ffff00} .c2_7{background-color:#f3f3f3} .c14_7{height:0pt} .c8_7{text-indent:36pt} .c11_7{text-align:center} .c7_7{font-style:italic} .c1_7{font-family:"Courier New"} .c13_7{line-height:1.0} .c15_7{border-collapse:collapse} .c12_7{font-weight:bold} .c10_7{font-size:8pt} .title{padding-top:24pt;line-height:1.15;text-align:left;color:#000000;font-size:36pt;font-family:"Arial";font-weight:bold;padding-bottom:6pt} .subtitle{padding-top:18pt;line-height:1.15;text-align:left;color:#666666;font-style:italic;font-size:24pt;font-family:"Georgia";padding-bottom:4pt} li{color:#000000;font-size:10pt;font-family:"Arial"} p{color:#000000;font-size:10pt;margin:0;font-family:"Arial"} h1{padding-top:0pt;line-height:1.15;text-align:left;color:#888;font-size:24pt;font-family:"Arial";font-weight:normal} h2{padding-top:0pt;line-height:1.15;text-align:left;color:#888;font-size:18pt;font-family:"Arial";font-weight:normal} h3{padding-top:0pt;line-height:1.15;text-align:left;color:#888;font-size:14pt;font-family:"Arial";font-weight:normal} h4{padding-top:0pt;line-height:1.15;text-align:left;color:#888;font-size:12pt;font-family:"Arial";font-weight:normal} h5{padding-top:0pt;line-height:1.15;text-align:left;color:#888;font-size:11pt;font-family:"Arial";font-weight:normal} h6{padding-top:0pt;line-height:1.15;text-align:left;color:#888;font-size:10pt;font-family:"Arial";font-weight:normal} This post continues the series of JMS articles which demonstrate how to use JMS queues in a SOA context. The previous posts were: JMS Step 1 - How to Create a Simple JMS Queue in Weblogic Server 11g JMS Step 2 - Using the QueueSend.java Sample Program to Send a Message to a JMS Queue JMS Step 3 - Using the QueueReceive.java Sample Program to Read a Message from a JMS Queue JMS Step 4 - How to Create an 11g BPEL Process Which Writes a Message Based on an XML Schema to a JMS Queue JMS Step 5 - How to Create an 11g BPEL Process Which Reads a Message Based on an XML Schema from a JMS Queue JMS Step 6 - How to Set Up an AQ JMS (Advanced Queueing JMS) for SOA Purposes This example demonstrates how to write a simple message to an Oracle AQ via the the WebLogic AQ JMS functionality from a BPEL process and a JMS adapter. If you have not yet reviewed the previous posts, please do so first, especially the JMS Step 6 post, as this one references objects created there. 1. Recap and Prerequisites In the previous example, we created an Oracle Advanced Queue (AQ) and some related JMS objects in WebLogic Server to be able to access it via JMS. Here are the objects which were created and their names and JNDI names: Database Objects Name Type AQJMSUSER Database User MyQueueTable Advanced Queue (AQ) Table UserQueue Advanced Queue WebLogic Server Objects Object Name Type JNDI Name aqjmsuserDataSource Data Source jdbc/aqjmsuserDataSource AqJmsModule JMS System Module AqJmsForeignServer JMS Foreign Server AqJmsForeignServerConnectionFactory JMS Foreign Server Connection Factory AqJmsForeignServerConnectionFactory AqJmsForeignDestination AQ JMS Foreign Destination queue/USERQUEUE eis/aqjms/UserQueue Connection Pool eis/aqjms/UserQueue 2 . Create a BPEL Composite with a JMS Adapter Partner Link This step requires that you have a valid Application Server Connection defined in JDeveloper, pointing to the application server on which you created the JMS Queue and Connection Factory. You can create this connection in JDeveloper under the Application Server Navigator. Give it any name and be sure to test the connection before completing it. This sample will write a simple XML message to the AQ JMS queue via the JMS adapter, based on the following XSD file, which consists of a single string element: stringPayload.xsd <?xml version="1.0" encoding="windows-1252" ?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"                xmlns="http://www.example.org"                targetNamespace="http://www.example.org"                elementFormDefault="qualified">  <xsd:element name="exampleElement" type="xsd:string">  </xsd:element> </xsd:schema> The following steps are all executed in JDeveloper. The SOA project will be created inside a JDeveloper Application. If you do not already have an application to contain the project, you can create a new one via File > New > General > Generic Application. Give the application any name, for example JMSTests and, when prompted for a project name and type, call the project   JmsAdapterWriteAqJms  and select SOA as the project technology type. If you already have an application, continue below. Create a SOA Project Create a new project and select SOA Tier > SOA Project as its type. Name it JmsAdapterWriteAqJms . When prompted for the composite type, choose Composite With BPEL Process. When prompted for the BPEL Process, name it JmsAdapterWriteAqJms too and choose Synchronous BPEL Process as the template. This will create a composite with a BPEL process and an exposed SOAP service. Double-click the BPEL process to open and begin editing it. You should see a simple BPEL process with a Receive and Reply activity. As we created a default process without an XML schema, the input and output variables are simple strings. Create an XSD File An XSD file is required later to define the message format to be passed to the JMS adapter. In this step, we create a simple XSD file, containing a string variable and add it to the project. First select the xsd item in the left-hand navigation tree to ensure that the XSD file is created under that item. Select File > New > General > XML and choose XML Schema. Call it stringPayload.xsd  and when the editor opens, select the Source view. then replace the contents with the contents of the stringPayload.xsd example above and save the file. You should see it under the XSD item in the navigation tree. Create a JMS Adapter Partner Link We will create the JMS adapter as a service at the composite level. If it is not already open, double-click the composite.xml file in the navigator to open it. From the Component Palette, drag a JMS adapter over onto the right-hand swim lane, under External References. This will start the JMS Adapter Configuration Wizard. Use the following entries: Service Name: JmsAdapterWrite Oracle Enterprise Messaging Service (OEMS): Oracle Advanced Queueing AppServer Connection: Use an existing application server connection pointing to the WebLogic server on which the connection factory created earlier is located. You can use the “+” button to create a connection directly from the wizard, if you do not already have one. Adapter Interface > Interface: Define from operation and schema (specified later) Operation Type: Produce Message Operation Name: Produce_message Produce Operation Parameters Destination Name: Wait for the list to populate. (Only foreign servers are listed here, because Oracle Advanced Queuing was selected earlier, in step 3) .         Select the foreign server destination created earlier, AqJmsForeignDestination (queue) . This will automatically populate the Destination Name field with the name of the foreign destination, queue/USERQUEUE . JNDI Name: The JNDI name to use for the JMS connection. This is the JNDI name of the connection pool created in the WebLogic Server.JDeveloper does not verify the value entered here. If you enter a wrong value, the JMS adapter won’t find the queue and you will get an error message at runtime. In our example, this is the value eis/aqjms/UserQueue Messages URL: We will use the XSD file we created earlier, stringPayload.xsd to define the message format for the JMS adapter. Press the magnifying glass icon to search for schema files. Expand Project Schema Files > stringPayload.xsd and select exampleElement : string . Press Next and Finish, which will complete the JMS Adapter configuration. Wire the BPEL Component to the JMS Adapter In this step, we link the BPEL process/component to the JMS adapter. From the composite.xml editor, drag the right-arrow icon from the BPEL process to the JMS adapter’s in-arrow.   This completes the steps at the composite level. 3. Complete the BPEL Process Design Invoke the JMS Adapter Open the BPEL component by double-clicking it in the design view of the composite.xml. This will display the BPEL process in the design view. You should see the JmsAdapterWrite partner link under one of the two swim lanes. We want it in the right-hand swim lane. If JDeveloper displays it in the left-hand lane, right-click it and choose Display > Move To Opposite Swim Lane. An Invoke activity is required in order to invoke the JMS adapter. Drag an Invoke activity between the Receive and Reply activities. Drag the right-hand arrow from the Invoke activity to the JMS adapter partner link. This will open the Invoke editor. The correct default values are entered automatically and are fine for our purposes. We only need to define the input variable to use for the JMS adapter. By pressing the green “+” symbol, a variable of the correct type can be auto-generated, for example with the name Invoke1_Produce_Message_InputVariable. Press OK after creating the variable. Assign Variables Drag an Assign activity between the Receive and Invoke activities. We will simply copy the input variable to the JMS adapter and, for completion, so the process has an output to print, again to the process’s output variable. Double-click the Assign activity and create two Copy rules: for the first, drag Variables > inputVariable > payload > client:process > client:input_string to Invoke1_Produce_Message_InputVariable > body > ns2:exampleElement for the second, drag the same input variable to outputVariable > payload > client:processResponse > client:result This will create two copy rules, similar to the following: Press OK. This completes the BPEL and Composite design. 4. Compile and Deploy the Composite Compile the process by pressing the Make or Rebuild icons or by right-clicking the project name in the navigator and selecting Make... or Rebuild... If the compilation is successful, deploy it to the SOA server connection defined earlier. (Right-click the project name in the navigator, select Deploy to Application Server, choose the application server connection, choose the partition on the server (usually default) and press Finish. You should see the message ----  Deployment finished.  ---- in the Deployment frame, if the deployment was successful. 5. Test the Composite Execute a Test Instance In a browser, log in to the Enterprise Manager 11g Fusion Middleware Control (EM) for your SOA installation. Navigate to SOA > soa-infra (soa_server1) > default (or wherever you deployed your composite) and click on  JmsAdapterWriteAqJms [1.0] , then press the Test button. Enter any string into the text input field, for example “Test message from JmsAdapterWriteAqJms” then press Test Web Service. If the instance is successful, you should see the same text you entered in the Response payload frame. Monitor the Advanced Queue The test message will be written to the advanced queue created at the top of this sample. To confirm it, log in to the database as AQJMSUSER and query the MYQUEUETABLE database table. For example, from a shell window with SQL*Plus sqlplus aqjmsuser/aqjmsuser SQL> SELECT user_data FROM myqueuetable; which will display the message contents, for example Similarly, you can use the JDeveloper Database Navigator to view the contents. Use a database connection to the AQJMSUSER and in the navigator, expand Queues Tables and select MYQUEUETABLE. Select the Data tab and scroll to the USER_DATA column to view its contents. This concludes this example. The following post will be the last one in this series. In it, we will learn how to read the message we just wrote using a BPEL process and AQ JMS. Best regards John-Brown Evans Oracle Technology Proactive Support Delivery

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• Drupal JSON POST from PhoneGap

  - by abritez

  I am trying to send a POST request to Drupal's Services module & JSON_Server module, however I am getting { "#error": true, "#data": "Invalid method " } Since PhoneGap runs html files from locally on the phone, should i need to worry about JSONP. The issue I have with that is that I must POST data, and JSONP only allows for GET. Any ideas would be helpful. Thanks! //SEND REQUEST AND CALLBACK FUNCTION var req; DrupalService.prototype.request = function(dataObject, callback){ req = false; var url = DRUPAL_JSON_URL; var params = "data="+dataObject; try { req = new XMLHttpRequest(); } catch(e) { req = false; } if(req) { req.onreadystatechange = function() {//Call a function when the state changes. if(req.readyState == 4 && req.status == 200) { console.log(" "+req.responseText); } } req.open("POST", url, false); req.send(params); } }

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• ListView items not clickable with HorizontalScrollView inside

  - by Felix

  I have quite a complicated ListView. Each item looks something like this: > LinearLayout (vertical) > LinearLayout (horizontal) > include (horizontal LinearLayout with two TextViews) > include (ditto) > include (ditto) > TextView > HorizontalScrollView (this guy is my problem) > LinearLayout (horizontal) In my activity, when an item is created (getView() is called) I add dynamic TextViews to the LinearLayout inside the HorizontalScrollView (besides filling the other, simpler stuff out). Amazingly, performance is pretty good. My problem is that when I added the HorizontalScrollView, my list items became unclickable. They don't get the orange background when clicked and they don't fire the OnItemClickedListener I have set up (to do a simple Log.d call). How can I make my list items clickable again?

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• Locking Cache Key without Locking the entire Cache

  - by Gandalf

  I have servlets that caches user information rather then retrieving it from the user store on every request (shared Ehcache). The issue I have is that if a client is multi-threaded and they make more then one simultaneous request, before they have been authenticated, then I get this in my log: Retrieving User [Bob] Retrieving User [Bob] Retrieving User [Bob] Returned [Bob] ...caching Returned [Bob] ...caching Returned [Bob] ...caching What I would want is that the first request would call the user service, while the other two requests get blocked - and when the first request returns, and then caches the object, the other two requests go through: Retrieving User [Bob] blocking... blocking... Returned [Bob] ...caching [Bob] found in cache [Bob] found in cache I've thought about locking on the String "Bob" (because due to interning it's always the same object right?). Would that work? And if so how do I keep track of the keys that actually exist in the cache and build a locking mechanism around them that would then return the valid object once it's retrieved. Thanks.

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• ASP.NET MVC 2 and authentication using WIF (Windows Identity Foundation)

  - by Russ Cam

  Are there any decent examples of the following available: Looking through the WIF SDK, there are examples of using WIF in conjunction with ASP.NET using the WSFederationAuthenticationModule (FAM) to redirect to an ASP.NET site thin skin on top of a Security Token Service (STS) that user uses to authenticate (via supplying a username and password). If I understand WIF and claims-based access correctly, I would like my application to provide its own login screen where users provide their username and password and let this delegate to an STS for authentication, sending the login details to an endpoint via a security standard (WS-*), and expecting a SAML token to be returned. Ideally, the SessionAuthenticationModule would work as per the examples using FAM in conjunction with SessionAuthenticationModule i.e. be responsible for reconstructing the IClaimsPrincipal from the session security chunked cookie and redirecting to my application login page when the security session expires. Is what I describe possible using FAM and SessionAuthenticationModule with appropriate web.config settings, or do I need to think about writing a HttpModule myself to handle this? Alternatively, is redirecting to a thin web site STS where users log in the de facto approach in a passive requestor scenario?

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• Grails, app-engine, jpa - TargetInvocationException

  - by John

  I'm trying to learn about grails with Google App Engine and JPA by following a few tutorials: http://www.morkeleb.com/2009/08/12/grails-and-google-appengine-beginners-guide/ http://inhouse32.appspot.com/index.html http://grails.org/plugin/app-engine I've got grails 1.3.0 RC 2, and App Engine SDK 1.3.3, and I'm using Windows 7. The steps that I try are: grails create-app appname cd appname grails install-plugin app-engine. I answer jpa when asked about jdo/jpa. It appears to install the gorm-jpa plugin automatically, although the tutorials all suggest installing gorm-jpa manually. grails install-plugin gorm-jpa (just in case) grails create-domain-class test.Person Edit the grails-app/domain/test/Person.groovy to add name and address fields: package test import javax.persistence.*; // import com.google.appengine.api.datastore.Key; @Entity class Person implements Serializable { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) Long id @Basic String name @Basic String address static constraints = { id visible:false } } grails generate-all test.Person I get errors during this final step: C:\Users\John\Workspaces\STS\appname>grails generate-all test.Person Welcome to Grails 1.3.0.RC2 - http://grails.org/ Licensed under Apache Standard License 2.0 Grails home is set to: C:\Users\John\Downloads\grails-1.3.0.RC2\grails-1.3.0.RC2 Base Directory: C:\Users\John\Workspaces\STS\appname Resolving dependencies... Dependencies resolved in 493ms. Running script C:\Users\John\Downloads\grails-1.3.0.RC2\grails-1.3.0.RC2\scripts\GenerateAll.groovy Environment set to development [copy] Copied 4 empty directories to 2 empty directories under C:\Users\John\.grails\1.3.0.RC2\projects\appname\resources [copy] Copied 4 empty directories to 2 empty directories under C:\Users\John\.grails\1.3.0.RC2\projects\appname\resources [copy] Copied 1 empty directory to 1 empty directory under C:\Users\John\.grails\1.3.0.RC2\projects\appname\resources [mkdir] Created dir: C:\Users\John\Workspaces\STS\appname\web-app\WEB-INF\classes [groovyc] Compiling 12 source files to C:\Users\John\Workspaces\STS\appname\web-app\WEB-INF\classes Note: C:\Users\John\.grails\1.3.0.RC2\projects\appname\plugins\gorm-jpa-0.7.1\src\java\org\grails\jpa\domain\JpaGrailsDomainClass.java uses or overrides a deprecated API. Note: Recompile with -Xlint:deprecation for details. Note: Some input files use unchecked or unsafe operations. Note: Recompile with -Xlint:unchecked for details. [groovyc] Compiling 8 source files to C:\Users\John\Workspaces\STS\appname\web-app\WEB-INF\classes [mkdir] Created dir: C:\Users\John\.grails\1.3.0.RC2\projects\appname\resources\grails-app\i18n [native2ascii] Converting 13 files from C:\Users\John\Workspaces\STS\appname\grails-app\i18n to C:\Users\John\.grails\1.3.0.RC2\projects\appname\resources\grails-app\i18n [mkdir] Created dir: C:\Users\John\.grails\1.3.0.RC2\projects\appname\resources\plugins\gorm-jpa-0.7.1\grails-app\i18n [mkdir] Created dir: C:\Users\John\.grails\1.3.0.RC2\projects\appname\resources\plugins\app-engine-0.8.10\grails-app\i18n [native2ascii] Converting 1 file from C:\Users\John\.grails\1.3.0.RC2\projects\appname\plugins\gorm-jpa-0.7.1\grails-app\i18n to C:\Users\John\.grails\1.3.0.RC2\projects\appname\resources\plugins\gorm -jpa-0.7.1\grails-app\i18n [native2ascii] Converting 1 file from C:\Users\John\.grails\1.3.0.RC2\projects\appname\plugins\app-engine-0.8.10\grails-app\i18n to C:\Users\John\.grails\1.3.0.RC2\projects\appname\resources\plugins\a pp-engine-0.8.10\grails-app\i18n [copy] Copying 1 file to C:\Users\John\Workspaces\STS\appname\web-app\WEB-INF\classes [copy] Copying 2 files to C:\Users\John\.grails\1.3.0.RC2\projects\appname\resources [copy] Copied 2 empty directories to 2 empty directories under C:\Users\John\.grails\1.3.0.RC2\projects\appname\resources [copy] Copying 1 file to C:\Users\John\.grails\1.3.0.RC2\projects\appname [mkdir] Created dir: C:\Users\John\Workspaces\STS\appname\web-app\plugins\app-engine-0.8.10 [copy] Copying 1 file to C:\Users\John\Workspaces\STS\appname\web-app\plugins\app-engine-0.8.10 [copy] Copying 1 file to C:\Users\John\Workspaces\STS\appname\web-app\WEB-INF [mkdir] Created dir: C:\Users\John\Workspaces\STS\appname\web-app\WEB-INF\lib [copy] Copying 64 files to C:\Users\John\Workspaces\STS\appname\web-app\WEB-INF\lib Configuring persistence for AppEngine [mkdir] Created dir: C:\Users\John\Workspaces\STS\appname\web-app\WEB-INF\classes\META-INF [copy] Copying 1 file to C:\Users\John\Workspaces\STS\appname\web-app\WEB-INF\classes\META-INF [mkdir] Created dir: C:\Users\John\Workspaces\STS\appname\web-app\WEB-INF\plugins\app-engine-0.8.10 [copy] Copying 2 files to C:\Users\John\Workspaces\STS\appname\web-app\WEB-INF\plugins\app-engine-0.8.10 [mkdir] Created dir: C:\Users\John\Workspaces\STS\appname\web-app\WEB-INF\plugins\gorm-jpa-0.7.1 [copy] Copying 2 files to C:\Users\John\Workspaces\STS\appname\web-app\WEB-INF\plugins\gorm-jpa-0.7.1 Packaging AppEngine jar files Enhancing JDO classes [enhance] DataNucleus Enhancer (version 1.1.4) : Enhancement of classes [enhance] DataNucleus Enhancer completed with success for 1 classes. Timings : input=589 ms, enhance=200 ms, total=789 ms. Consult the log for full details [groovyc] Compiling 1 source file to C:\Users\John\Workspaces\STS\appname\web-app\WEB-INF\classes [copy] Copying 1 file to C:\Users\John\.grails\1.3.0.RC2\projects\appname [copy] Copying 1 file to C:\Users\John\Workspaces\STS\appname\web-app\WEB-INF Configuring persistence for AppEngine Packaging AppEngine jar files Enhancing JDO classes [enhance] DataNucleus Enhancer (version 1.1.4) : Enhancement of classes [enhance] DataNucleus Enhancer completed with success for 1 classes. Timings : input=585 ms, enhance=28 ms, total=613 ms. Consult the log for full details Generating views for domain class test.Person ... java.lang.reflect.InvocationTargetException at SimpleTemplateScript1.run(SimpleTemplateScript1.groovy:43) at _GrailsGenerate_groovy.generateForDomainClass(_GrailsGenerate_groovy:85) at _GrailsGenerate_groovy$_run_closure1.doCall(_GrailsGenerate_groovy:50) at GenerateAll$_run_closure1.doCall(GenerateAll.groovy:42) at gant.Gant$_dispatch_closure5.doCall(Gant.groovy:381) at gant.Gant$_dispatch_closure7.doCall(Gant.groovy:415) at gant.Gant$_dispatch_closure7.doCall(Gant.groovy) at gant.Gant.withBuildListeners(Gant.groovy:427) at gant.Gant.this$2$withBuildListeners(Gant.groovy) at gant.Gant$this$2$withBuildListeners.callCurrent(Unknown Source) at gant.Gant.dispatch(Gant.groovy:415) at gant.Gant.this$2$dispatch(Gant.groovy) at gant.Gant.invokeMethod(Gant.groovy) at gant.Gant.executeTargets(Gant.groovy:590) at gant.Gant.executeTargets(Gant.groovy:589) Caused by: java.lang.NoClassDefFoundError: org/hibernate/MappingException ... 15 more Caused by: java.lang.ClassNotFoundException: org.hibernate.MappingException at org.codehaus.groovy.tools.RootLoader.findClass(RootLoader.java:156) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at org.codehaus.groovy.tools.RootLoader.loadClass(RootLoader.java:128) at java.lang.ClassLoader.loadClass(ClassLoader.java:248) ... 15 more Error running generate-all: null What am I doing wrong?

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• Debugging error "The Type 'xx' is defined in an assembly that is not referenced"

  - by Abel

  The full error is as follows: The type 'System.Windows.Forms.Control' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'. and it points at the very first statement (an Debug.Assert line) in the very first class in a library project that doesn't need System.Windows.Forms (or so I thought). I know how to solve it: add the mentioned reference. But how do I find out what library is causing this error, or better, what part of the code triggers using the WinForms library? Normally, you can add libraries that reference others, but you only need to add references to these others when they're actually used. EDIT: Alternative solution This or similar problems can also be resolved using the Binding Log Viewer Fuslogvw.exe from Microsoft's Framework Tools. It shows all attempts and successes of assemblies your application binds to.

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• trying to convert rails 2.3.4 app to rails 3 but views not appearing

  - by kgrad

  I have a simple rails 2.3.4 application I am trying to get running with rails 3.0.0-beta2. I have the server running and all my links and navigation showing, however for some reason the content of my views is not displaying. When I navigate to Site/index the html in my index.html.erb in my site view is completely ignored. There are no errors in the server log. My template is rendered properly (where all the links and navigation are being created) within application.html.erb however all of my actual view files are being ignored. Has anyone experienced this? I am using old style routing with map.connect, could this be the issue? Does anyone have a tutorial on how to convert old routes to new ones? I couldn't figure it out. my current routes look like this: map.connect ':controller/:action/:id' map.connect ':controller/:action/:id.:format' map.root :controller => :site, :action => :index

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• Interview with Tomas Ulin at the MySQL Innovation Day

  - by Monica Kumar

  MySQL Innovation Day held on June 5, 2012 was a great event for the MySQL engineers, users and customers to gather, share and network. I was able to get a few minutes with Tomas Ulin, Vice President of MySQL Engineering at Oracle, to ask him some questions. Here are the highlights of my interview with Tomas. Monica: This was the first MySQL Innovation Day, correct?  Why now, what was the strategy behind hosting this kind of event? Tomas: In the last year, we have rolled out an incredible number of MySQL events worldwide – some targeted at developers that are new to MySQL and others for the MySQL savvy. At the MySQL Innovation Day, our first event of this kind,, we had a number of our key engineers presenting lightning talks delivering previews of key new features as well as discussing roadmap. Our goal is to keep an open dialogue with the MySQL community. In fact, we are hosting a two-day conference, another first, for the MySQL community called MySQL Connect on Sept. 29-30 in San Francisco. If you attended the MySQL Innovation Day and liked what we did, you are going to love MySQL Connect. We’ll have a lot more of our engineers and many users and community members presenting hour long sessions and hands on labs. Our engineers will be presenting new MySQL features as well offer previews of upcoming enhancements. Monica: What's the big take-away from today's MySQL Innovation Day? Tomas: I hope the most important takeaway for attendees was to see that Oracle has been driving, and continues to drive MySQL innovation with a steady stream of new great GA and Development Milestone releases. Monica: What were attendees most interested in? What feedback did they have? Tomas: Feedback from attendees was incredibly positive and encouraging. In particular, they liked the interaction with the MySQL engineers and were also excited about the new early access features in MySQL 5.6 and MySQL Cluster 7.3. In addition, sessions delivered by MySQL users like Facebook, Pinterest and Twitter were very well received. For example, Pinterest talked about using MySQL to scale from 0 to billions of page views/month, Twitter talked about “Scaling twitter with MySQL” and Facebook discussed the many options to implement MySQL master failover solutions. The presentations are already available for download while some of the session videos will be made available on the MySQL Innovation Day web page shortly. Monica: How would you distinguish the use of MySQL vs. Oracle Database? What key factors should customers consider? Tomas: MySQL and Oracle Database complement each other. They are very different products, best suited to different use cases. Customers can choose world-class solutions from Oracle to fulfill a variety of needs. MySQL is a great choice for enterprise web-based, custom and embedded apps. Oracle Database is the leading choice for enterprise packaged applications such as ERP, CRM as well as high-end data warehousing and business intelligence applications. Monica: What are the highlights of the current MySQL 5.6 Development Milestone Release and early access features for MySQL Cluster 7.3? Tomas: MySQL 5.6 development milestone release builds on MySQL 5.5 by improving: Optimizer for better Performance, Scalability Performance Schema for better instrumentation InnoDB for better transactional throughput Replication for higher availability, data integrity NoSQL options for more flexibility We announced some new early access features in MySQL 5.6, including binary log group commit. We also announced early access features in MySQL Cluster 7.3 including support for foreign key constraints. Monica: How do people get these releases? Tomas: You can access development milestone releases by going to: http://dev.mysql.com/downloads/mysqlThen select the “Development Release” tab. The MySQL Cluster 7.3 and other early access features can be downloaded at: http://labs.mysql.com Monica: What's coming up next for MySQL? Tomas: Our development team is working in overdrive, cranking out new features with community feedback. Don’t miss the MySQL Connect conference being held in San Francisco on Sept. 29 and 30th. My team and I will be there. I hope you can join us! Monica: Thank you for your time, Tomas. I look forward to seeing you at the MySQL Connect conference. To our followers, I hope you found this interview informative. I welcome your comments. Please stay tuned here for more updates on MySQL. Note: Monica Kumar is Senior Director of product marketing for Linux, Virtualization and MySQL at Oracle.

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• OAuth::Problem (parameter_absent)

  - by Sid

  Im working with OAuth 0.3.6 and the linkedin gem for a Rails application and I have this issue where OAuth throws an error saying that OAuth::Problem (parameter_absent). The thing is it doesn't throw the error on every occasion its called and the problem is I am unable to reproduce the issue locally to test it. The documentation says that : [parameter_absent: a required parameter wasn't received. In this case, the response SHOULD also contain an oauth_parameters_absent parameter. ] but the request is generated the same way each time to obtain the tokens so I fail to understand why this happens. Log OAuth::Problem (parameter_absent): oauth (0.3.6) lib/oauth/consumer.rb:167:in `request' oauth (0.3.6) lib/oauth/consumer.rb:183:in `token_request' oauth (0.3.6) lib/oauth/tokens/request_token.rb:18:in `get_access_token' linkedin (0.1.7) lib/linked_in/client.rb:35:in `authorize_from_request' app/controllers/users_controller.rb:413:in `linkedin_save' I have seen a few people facing this issue but I am yet to figure out a way to resolve this. Would appreciate some help on this.

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• sqllite and populating list view, android

  - by Rob Bushway

  I am populating a text and list view from a sqllite database. The data is populating from the cursor correctly (I see the list filling with text rows), but I'm not able to see the actual text in the rows - all I see are empty rows. For the life of me, I can't figure out what I'm not able to see the data in the text rows. My layouts: Tab layout: list layout: row layout: <?xml version="1.0" encoding="utf-8"?> / My topics activity package com.gotquestions.gqapp; import com.gotquestions.gqapp.R.layout; import android.R; import android.app.ListActivity; import android.database.Cursor; import android.database.SQLException; import android.os.Bundle; import android.widget.SimpleCursorAdapter; public class TopicsActivity extends ListActivity { private DataBaseHelper myDbHelper; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // DataBaseHelper myDbHelper = new DataBaseHelper(this); myDbHelper = new DataBaseHelper(this); //test try { myDbHelper.openDataBase(); }catch(SQLException sqle){ throw sqle; } setContentView(layout.list_layout); Cursor c = myDbHelper.fetchAllTopics(); startManagingCursor(c); String[] from = new String[] { DataBaseHelper.KEY_TITLE }; int[] to = new int[] { R.id.text1 }; // Now create an array adapter and set it to display using our row SimpleCursorAdapter notes = new SimpleCursorAdapter(this, layout.notes_row, c, from, to); setListAdapter(notes); myDbHelper.close(); } } My database helper: package com.gotquestions.gqapp; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import android.content.Context; import android.database.Cursor; import android.database.SQLException; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteException; import android.database.sqlite.SQLiteOpenHelper; import android.util.Log; public class DataBaseHelper extends SQLiteOpenHelper{ //The Android's default system path of your application database. private static String DB_PATH = "/data/data/com.gotquestions.gqapp/databases/"; private static String DB_NAME = "gotquestions_database.mp3"; public static final String KEY_TITLE = "topic_title"; public static final String KEY_ARTICLE_TITLE = "article_title"; public static final String KEY_ROWID = "_id"; private static final String TAG = null; private SQLiteDatabase myDataBase; // private final Context myContext; /** * Constructor * Takes and keeps a reference of the passed context in order to access to the application assets and resources. * @param context */ public DataBaseHelper(Context context) { super(context, DB_NAME, null, 1); this.myContext = context; } /** * Creates a empty database on the system and rewrites it with your own database. * */ public void createDataBase() throws IOException{ boolean dbExist = checkDataBase(); if(dbExist){ //do nothing - database already exist }else{ //By calling this method and empty database will be created into the default system path //of your application so we are gonna be able to overwrite that database with our database. this.getReadableDatabase(); try { copyDataBase(); } catch (IOException e) { throw new Error("Error copying database"); } } } /** * Check if the database already exist to avoid re-copying the file each time you open the application. * @return true if it exists, false if it doesn't */ private boolean checkDataBase(){ SQLiteDatabase checkDB = null; try{ String myPath = DB_PATH + DB_NAME; checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY); }catch(SQLiteException e){ //database does't exist yet. } if(checkDB != null){ checkDB.close(); } return checkDB != null ? true : false; } /** * Copies your database from your local assets-folder to the just created empty database in the * system folder, from where it can be accessed and handled. * This is done by transfering bytestream. * */ private void copyDataBase() throws IOException{ //Open your local db as the input stream InputStream myInput = myContext.getAssets().open(DB_NAME); // Path to the just created empty db String outFileName = DB_PATH + DB_NAME; //Open the empty db as the output stream OutputStream myOutput = new FileOutputStream(outFileName); //transfer bytes from the inputfile to the outputfile byte[] buffer = new byte[1024]; int length; while ((length = myInput.read(buffer))>0){ myOutput.write(buffer, 0, length); } //Close the streams myOutput.flush(); myOutput.close(); myInput.close(); } public void openDataBase() throws SQLException{ //Open the database String myPath = DB_PATH + DB_NAME; myDataBase = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY); } @Override public synchronized void close() { if(myDataBase != null) myDataBase.close(); super.close(); } @Override public void onCreate(SQLiteDatabase db) { // TODO Auto-generated method stub } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { Log.w(TAG, "Upgrading database from version " + oldVersion + " to " + newVersion + ", which will destroy all old data"); db.execSQL("DROP TABLE IF EXISTS titles"); onCreate(db); } public Cursor getTitle(long rowId) throws SQLException { Cursor mCursor = myDataBase.query(true, "topics", new String[] { KEY_ROWID, KEY_TITLE }, KEY_ROWID + "=" + rowId, null, null, null, null, null); if (mCursor != null) { mCursor.moveToFirst(); } return mCursor; } public Cursor fetchAllTopics() { return myDataBase.query("topics", new String[] {KEY_ROWID, KEY_TITLE}, null, null, null, null, null); }; public Cursor fetchAllFavorites() { return myDataBase.query("articles", new String[] { KEY_ROWID, KEY_ARTICLE_TITLE}, null, null, null, null, null); }; }

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• PHP Frameworks (CodeIgnitor, Yii, CakePHP) vs. Django

  - by niting

  I have to develop a site which has to accomodate around 2000 users a day and speed is a criterion for it. Moreover, the site is a user oriented one where the user will be able to log in and check his profile, register for specific events he/she wants to participate in. The site is to be hosted on a VPS server.Although I have pretty good experience with python and PHP but I have no idea how to use either of the framework. We have plenty of time to experiment and learn one of the above frameworks.Could you please specify which one would be preferred for such a scenario considering speed, features, and security of the site. Thanks, niting

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