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  • One of my apache processes is huge - how can I find out why?

    - by Malcolm Box
    I'm running Apache 2.2.12 with mod_wsgi, hosting a Django site. Most of the apache child processes weigh in at about 125MB RSS, but occasionally I see one child balloon to 1GB RSS. At this point there's usually 1 huge process (1GB), a couple of large ones (500MB) and the rest are still ~125MB. These are the mod_wsgi daemon processes. I've tried using memory leak tracing in Python to see if it's the Django code, and I see no leaks. Looking in the logs doesn't show any particularly strange requests. I'm stumped on how to figure out what's causing this - any ideas? Also, any workaround ways to kill the large apache process when it gets too big, without bringing apache down? Some more details: Not using mod_php Using pre-fork

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  • Running scheduled web scripts in a Windows Server environment

    - by Dan Murfitt
    I'm trying to get a scheduled web script running on a Windows Server and so far the only way I've managed to automate this process is by using the Task Scheduler to open Internet Explorer with the web address as a parameter. I then need to create a separate task to run just after this task to close Internet Explorer (otherwise the task doesn't complete). Is there a better way of doing this? I've also managed to run the script by calling the web address through a Telnet connection to the web server (GET /web/address/here) but I haven't found a way of automating this process on a scheduled basis. Any ideas appreciated

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  • OSX Reset Home Permissions and ACLs - how long should it take?

    - by andyface
    Having screwwed up my permissions by trying to have two users accessing one home folder I'm now going through the process of reseting my main user home permissions via the OSX install disk utilities, which seems to be taking a while. Does this process take a while to do, though I assume it depends on how many files I have in the folder, which in my case is a good few 100 GBs. At what point should I be concerned that it may have got stuck and thus reset my computer and try again? I assume, though not sure that if the little circle indicator is still moving then it's not completely frozen, but as there's no progress bar or details I'm not sure how true that is.

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  • How to debug why w3wp.exe crashes randomly?

    - by sassyboy
    On the main production server, the IIS worker process crashes sometimes. From the event viewer I get the following information. Faulting application name: w3wp.exe, version: 7.5.7601.17514, time stamp: 0x4ce7a5f8 Faulting module name: KERNELBASE.dll, version: 6.1.7601.17651, time stamp: 0x4e211319 Exception code: 0xe053534f Fault offset: 0x0000b9bc Faulting process id: 0x%9 Faulting application start time: 0x%10 Faulting application path: %11 Faulting module path: %12 Report Id: %13 This happens randomly on the prod server and I have not been able to recreate this crash anywhere else. This was happening on IIS 6, and we recently moved to Windows Server 2008 and IIS 7.5 and the crash happens there as well. How to go about finding the root cause of this?

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  • Apparent leak in Mozilla Firefox

    - by LeopardSkinPillBoxHat
    I use Mozilla Firefox 3.6 all day, opening and closing tabs quite regularly. I am noticing over time that the firefox.exe process size keeps growing and growing over time. Initially I put this down to memory fragmentation caused by opening and closing tabs, but now I am suspecting that there is a memory leak in one of the add-ons that I have installed. The problem I am seeing is that when the process size gets to about 1.5GB in the "Mem Usage" stat in Task Manager (and it gets there quite regularly), Firefox freezes up. Does anyone have any ideas about how I could diagnose whether: Any of the add-ons are leaking memory? Something else is causing this problem?

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  • Camunda BPM 7.0 on WebLogic 12c

    - by JuergenKress
    If we go on tour together with Oracle I think we have to have camunda BPM running on the Oracle WebLogic application server 12c (WLS in short). And one of our enterprise customers asked - so I invested a Sunday and got it running (okay - to be honest - I needed quite some help from our Java EE server guru Christian). In this blog post I give a step by step description how run camunda BPM on WLS. Please note that this is not an official distribution (which would include a sophisticated QA, a comprehensive documentation and a proper distribution) - it was my personal hobby. And I did not fire the whole test suite agains WLS - so there might be some issues. We will do the real productization as soon as we have a customer for it (let us know if this is interesting for you). Necessary steps After installing and starting up WLS (I used the zip distribution of WLS 12c by the way) you have to do: Add a datasource Add shared libraries Add a resource adapter (for the Job Executor using a proper WorkManager from WLS) Add an EAR starting up one process engine Add a WAR file containing the REST API Add other WAR files (e.g. cockpit) and your own process applications Actually that sounds more work to do than it is ;-) So let's get started: Add a datasource Add a datasource via the Administration Console (or any other convenient way on WLS - I should admit that personally I am not the WLS expert). Make sure that you target it on your server - this is not done by default: Read the full article here. For regular information become a member in the WebLogic Partner Community please visit: http://www.oracle.com/partners/goto/wls-emea ( OPN account required). If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Mix Forum Wiki Technorati Tags: Camunda,BPM,JavaEE7,WebLogic Community,Oracle,OPN,Jürgen Kress

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  • Acr.ExtDirect &ndash; Part 1 &ndash; Method Resolvers

    - by Allan Ritchie
    One of the most important things of any open source libraries in my opinion is to be as open as possible while avoiding having your library become invasive to your code/business model design.  I personally could never stand marking my business and/or data access code with attributes everywhere.  XML also isn’t really a fav with too many people these days since it comes with a startup performance hit and requires runtime compiling.  I find that there is a whole ton of communication libraries out there currently requiring this (ie. WCF, RIA, etc).  Even though Acr.ExtDirect comes with its own set of attributes, you can piggy-back the [ServiceContract] & [OperationContract] attributes from WCF if you choose.  It goes beyond that though, there are 2 others “out-of-the-box” implementations – Convention based & XML Configuration.    Convention – I don’t actually recommend using this one since it opens up all of your public instance methods to remote execution calls. XML Configuration – This isn’t so bad but requires you enter all of your methods and there operation types into the Castle XML configuration & as I said earlier, XML isn’t the fav these days.   So what are your options if you don’t like attributes, convention, or XML Configuration?  Well, Acr.ExtDirect has its own extension base to give the API a list of methods and components to make available for remote execution.  1: public interface IDirectMethodResolver { 2:   3: bool IsServiceType(ComponentModel model, Type type); 4: string GetNamespace(ComponentModel model); 5: string[] GetDirectMethodNames(ComponentModel model); 6: DirectMethodType GetMethodType(ComponentModel model, MethodInfo method); 7: }   Now to implement our own method resolver:   1: public class TestResolver : IDirectMethodResolver { 2:   3: #region IDirectMethodResolver Members 4:   5: /// <summary> 6: /// Determine if you are calling a service 7: /// </summary> 8: /// <param name="model"></param> 9: /// <param name="type"></param> 10: /// <returns></returns> 11: public bool IsServiceType(ComponentModel model, Type type) { 12: return (type.Namespace == "MyBLL.Data"); 13: } 14:   15: /// <summary> 16: /// Return the calling name for the client side 17: /// </summary> 18: /// <param name="model"></param> 19: /// <returns></returns> 20: public string GetNamespace(ComponentModel model) { 21: return model.Name; 22: } 23:   24: public string[] GetDirectMethodNames(ComponentModel model) { 25: switch (model.Name) { 26: case "Products" : 27: return new [] { 28: "GetProducts", 29: "LoadProduct", 30: "Save", 31: "Update" 32: }; 33:   34: case "Categories" : 35: return new [] { 36: "GetProducts" 37: }; 38:   39: default : 40: throw new ArgumentException("Invalid type"); 41: } 42: } 43:   44: public DirectMethodType GetMethodType(ComponentModel model, MethodInfo method) { 45: if (method.Name.StartsWith("Save") || method.Name.StartsWith("Update")) 46: return DirectMethodType.FormSubmit; 47: 48: else if (method.Name.StartsWith("Load")) 49: return DirectMethodType.FormLoad; 50:   51: else 52: return DirectMethodType.Direct; 53: } 54:   55: #endregion 56: }   And there you have it, your own custom method resolver.  Pretty easy and pretty open ended!

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  • Downtime scheduling - can it be automated?

    - by Nnn
    When servers need to have scheduled downtime at my workplace we follow a process roughly like the following: Propose time for work to take place on specific box/s Lookup list of stakeholders for specific box/s Seek approval from stakeholders (service owners/management etc) via email Incorporate changes to proposed time if necessary, repeat step 2 until.. Now everyone is happy with the time, send out a notification via email of the time, ask Staff who care about when the box is going down manually add it to their calendars some stakeholders the staff doing the work Do the actual work Is there an OSS project that we could use to automate this process? My googling has been fruitless so far. Will we need to build something ourselves? Would anyone else be interested in something like this?

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  • Doesn't installing "All locales" install necessary fonts too?

    - by its_me
    I recently noticed that my browsers rendered blank text (or invisible text?) on some websites in foreign languages, like Chinese. inside.com.tw, for example. Later I learnt that by default Debian only installs one locale (the one you choose during the installation process), and others need to be installed manually. So, I ran the command: # dpkg-reconfigure locales And selected All locales from the options screen that followed, and proceeded with the rest of the process, which also includes changing the default locale (which I set to en_US.UTF-8). Then I restarted my system. I still can't read the website that I mentioned earlier (inside.com.tw). Most of the text is blank, i.e. invisible. With the page translated by Chrome to my default language (en_US), the text is visible; BUT not in the original language. Why is this happening? Does this mean that installing locales isn't actually necessary, and all I have to do is install the fonts for all supported languages? If so, how do I install all the fonts necessary for All locales? UPDATE: An easy fix is to install the unifont package which adds support for all Unicode 5.1 characters. But the rendering is of very bad quality. So, how I install all font packages? I notice that there are three sets, ones starting with fonts-*, another with xfonts-*, and ttf-*? Which set should I exactly go with, and how do I install that set of fonts. Looking for a knowledgeable solution.

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  • Ganglia and how it communicates

    - by MikeKulls
    I'm a little confused about how Ganglia sends information around and have found conflicting information on the web. I would have thought that the gmond process would either send info to gmetad at a regular interval or gmetad would request info from the various instances of gmond. At least one online article states this is how it works but from what I understand this is incorrect. It appears that you configure all gmond processes to send their info to a central gmond process and gmetad will request info from that central gmond. Is that correct? In my case I have 6 servers sending their information to 1 central server. If I set gmetad to get it's information from the central server then I get information from all 6 servers, all good.. Their weird thing is that if I point gmetad to one of the 6 servers then I still get info from all 6 servers. How is it that server 1 in my cluster if getting stats from all the other servers?

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  • IMAP can't access virtual account sharing name with local user account

    - by chernevik
    I am setting up a postfix/dovecot mail server with virtual accounts, per the Chris Haas tutorial. I'm finding that virtual users who also have local user accounts on the mail server cannot access their email remotely via IMAP. They're told they cannot login. (I'm using Thunderbird for that). These same users can login when emulating IMAP locally via telnet. Virtual users without local accounts have no trouble with IMAP access from remote clients. These local user accounts have vestiges of prior efforts in their home directories: mbox files, Mail and mail directories. I've looked at the logs for clues to where the remote login process is failing (dovecot authentication failure? confusion over where emails are stored?) but found nothing helpful. I haven't found much in the dovecot or postfix documentation that describes the IMAP login process and expectations in enough detail to help me diagnose this. So: how do I go about identifying the problem and researching a solution?

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  • Converting gzip files to bzip2 efficiently

    - by sundar
    I have a bunch of gzip files that I have to convert to bzip2 every now and then. Currently, I'm using a shell script that simply 'gunzip's each file and then 'bzip2's it. Though this works, it takes a lot of time to complete. Is it possible to make this process more efficient? I'm ready to take a dive and look into gunzip and bzip2's source codes if necessary, but I just want to be sure of the payoff. Is there any hope of improving the efficiency of the process?

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  • systemctl enable differs from systemctl start, how?

    - by rudi_visser
    I am running an Arch Linux (latest, up-to-date) box, and attempting to get MySQL to start at boot. With the systemd package installed I have systemctl available, and as such I can do things like this: systemctl start mysqld.service systemctl [stop|status|restart] mysqld.service That's all fine, and works great when I want to start/stop manually, however, when it comes to getting it to start at boot (by using 'enable' on systemctl, I get some nasty output): [root@rudivarch ~]# systemctl enable mysqld.service Failed to issue method call: No such file or directory Obviously, since the other commands work just fine, I'm seriously confused by this and have spent a good while trying to figure it out... systemctl status outputs this: [root@rudivarch ~]# systemctl status mysqld.service mysqld.service Loaded: loaded (/etc/rc.d/mysqld) Active: inactive (dead) since Tue, 31 Jan 2012 15:32:28 +0000; 1min 25s ago Process: 589 ExecStop=/etc/rc.d/mysqld stop (code=exited, status=0/SUCCESS) Process: 257 ExecStart=/etc/rc.d/mysqld start (code=exited, status=0/SUCCESS) CGroup: name=systemd:/system/mysqld.service Anybody have any ideas as to why 'enable' doesn't work?

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  • How to open the Quota Entries list for a given drive from a shortcut or command line?

    - by Indrek
    Is it possible to open the Quota Entries list for a given drive from a shortcut or the command line in Windows? And if so, how? I'm not talking about managing quota entries from the command line (fsutil quota), I'm looking for a way to get directly to the Quota Entries GUI rather than going through My Computer → right-click on a drive → Properties → Quota tab → Show Quota Settings → Quota Entries... I managed to find out (using Process Explorer) that the backend process is dllhost.exe, and the DLL in question should be dskquoui.dll, so it should be possible to run it directly with rundll32.exe, but I'm not sure of the exact syntax. Any ideas?

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  • korgac - init.d kill script on shutdown

    - by Max Magnus
    I'm new to Ubuntu 12.04 and Linux and my English is not the best, so I'm sorry for incorrect or stupid questions. I've installed KOrganizer and to start the reminder when I boot the system, I added the korgac command to the autostart. This works fine. But now, every time I want to reboot or shutdown my system, there appears a message that tells me that an unknown process is still running... so I have kill it manually before reboot/shutdown. I knew that it is the korgac process that causes this problem, so I decided to create an init.d script. I've created a script, put it into init.d, and created 2 symbolic links: to rc0.d and to rc6.d. The name starts with K10script... (I hope it is correct so). K10korgac_kill: #! /bin/sh pkill korgac exit 0 Unfortunately this wasn't able to resolve my problem. Maybe my script is wrong. I hope someone can help me. Thanks for your time Max

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  • Partner Webcast: Implementing on SOA - A Hands-On Technology Demonstration

    - by Thanos
    Service Oriented Architecture enables organizations to operate more efficiently and react faster to opportunities. How? By helping you create a flexible application architecture that supports greater business agility. You decide how quickly you want to move. You can start by implementing an application integration platform. Then, you can evolve your environment gradually by introducing business process management, business rules, governance and event processing. This unified but flexible approach also allows you to maximize the long-term cost reduction benefits of SOA and cloud-based applications. In this session, you dive into SOA Suite and you will see the usage of some advanced features. The topics covered range from adapters, automatic and custom business process correlation through service routing, rule based and manual decisions and to error handling, compensations and extending SOA Suite with your own Java code. Agenda: Service Oriented Architecture The Auctions Scenario Live Demo of the Oracle SOA Suite Features Connecting to non service enabled technologies with adapters (Database and File adapter) Orchestrating services with BPEL processes Correlating processes with correlation sets Mediating services Service Component Architecture Event Handling User Notification Human Workflow Business Rules Fault Handling patterns Developing custom components with Spring and using them in SOA Suite composites Delivery Format This FREE online LIVE eSeminar will be delivered over the Web. Registrations received less than 24hours prior to start time may not receive confirmation to attend. Duration: 1 hour Register Now For all your questions and support requests to adopt and implement the latest Oracle technologies please contact us at [email protected]

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  • Looking under the hood of SSRS

    - by Jim Giercyk
    SSRS is a powerful tool, but there is very little available to measure it’s performance or view the SSRS execution log or catalog in detail.  Here are a few simple queries that will give you insight to the system that you never had before.   ACTIVE REPORTS:  Have you ever seen your SQL Server performance take a nose dive due to a long-running report?  If the SPID is executing under a generic Report ID, or it is a scheduled job, you may have no way to tell which report is killing your server.  Running this query will show you which reports are executing at a given time, and WHO is executing them.   USE ReportServerNative SELECT runningjobs.computername,             runningjobs.requestname,              runningjobs.startdate,             users.username,             Datediff(s,runningjobs.startdate, Getdate()) / 60 AS    'Active Minutes' FROM runningjobs INNER JOIN users ON runningjobs.userid = users.userid ORDER BY runningjobs.startdate               SSRS CATALOG:  We have all asked “What was the last thing that changed”, or better yet, “Who in the world did that!”.  Here is a query that will show all of the reports in your SSRS catalog, when they were created and changed, and by who.           USE ReportServerNative SELECT DISTINCT catalog.PATH,                            catalog.name,                            users.username AS [Created By],                             catalog.creationdate,                            users_1.username AS [Modified By],                            catalog.modifieddate FROM catalog         INNER JOIN users ON catalog.createdbyid = users.userid  INNER JOIN users AS users_1 ON catalog.modifiedbyid = users_1.userid INNER JOIN executionlogstorage ON catalog.itemid = executionlogstorage.reportid WHERE ( catalog.name <> '' )               SSRS EXECUTION LOG:  Sometimes we need to know what was happening on the SSRS report server at a given time in the past.  This query will help you do just that.  You will need to set the timestart and timeend in the WHERE clause to suit your needs.         USE ReportServerNative SELECT catalog.name AS report,        executionlogstorage.username AS [User],        executionlogstorage.timestart,        executionlogstorage.timeend,         Datediff(mi,e.timestart,e.timeend) AS ‘Time In Minutes',        catalog.modifieddate AS [Report Last Modified],        users.username FROM   catalog  (nolock)        INNER JOIN executionlogstorage e (nolock)          ON catalog.itemid = executionlogstorage.reportid        INNER JOIN users (nolock)          ON catalog.modifiedbyid = users.userid WHERE  executionlogstorage.timestart >= Dateadd(s, -1, '03/31/2012')        AND executionlogstorage.timeend <= Dateadd(DAY, 1, '04/02/2012')      LONG RUNNING REPORTS:  This query will show the longest running reports over a given time period.  Note that the “>5” in the WHERE clause sets the report threshold at 5 minutes, so anything that ran less than 5 minutes will not appear in the result set.  Adjust the threshold and start/end times to your liking.  With this information in hand, you can better optimize your system by tweaking the longest running reports first.         USE ReportServerNative SELECT executionlogstorage.instancename,        catalog.PATH,        catalog.name,        executionlogstorage.username,        executionlogstorage.timestart,        executionlogstorage.timeend,        Datediff(mi, e.timestart, e.timeend) AS 'Minutes',        executionlogstorage.timedataretrieval,        executionlogstorage.timeprocessing,        executionlogstorage.timerendering,        executionlogstorage.[RowCount],        users_1.username        AS createdby,        CONVERT(VARCHAR(10), catalog.creationdate, 101)        AS 'Creation Date',        users.username        AS modifiedby,        CONVERT(VARCHAR(10), catalog.modifieddate, 101)        AS 'Modified Date' FROM   executionlogstorage e         INNER JOIN catalog          ON executionlogstorage.reportid = catalog.itemid        INNER JOIN users          ON catalog.modifiedbyid = users.userid        INNER JOIN users AS users_1          ON catalog.createdbyid = users_1.userid WHERE  ( e.timestart > '03/31/2012' )        AND ( e.timestart <= '04/02/2012' )        AND  Datediff(mi, e.timestart, e.timeend) > 5        AND catalog.name <> '' ORDER  BY 'Minutes' DESC        I have used these queries to build SSRS reports that I can refer to quickly, and export to Excel if I need to report or quantify my findings.  I encourage you to look at the data in the ReportServerNative database on your report server to understand the queries and create some of your own.  For instance, you may want a query to determine which reports are using which shared data sources.  Work smarter, not harder!

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  • How to install compat-drivers or compat-wireless

    - by Sasho
    Could someone please explain me in detail how to install some of this drivers. I am running Ubuntu 12.04.2 and have the infamous (as I see everywhere in the net) problem with Atheros AR9462 wifi card. I tried everything to fix it and compat drivers are the only solution that I haven't tried. I tried to install some random package from kernel.org site and it couldn't make the driver (it threw some error). Then I updated the kernel to 3.10-rc7 and downloaded the last release of compat drivers and again the same problem occured. I reinstalled Ubuntu 12.04.2 and now I am using the 3.5 kernel because I don't know if rc7 is stable version. So my question is which compat wireless or compat drivers to download for this kernel and what is the process of installing. I tried with some command from the repository and it returned that it's not found. PS I am new to Ubuntu and Linux in general so explaining at length the install process and which driver I should install would be appreciated.

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  • Oracle Partners Delivering Business Transformations With Oracle WebCenter

    - by Brian Dirking
    This week we’ve been discussing a new online event, “Transform Your Business by Connecting People, Processes, and Content.” This event will include a number of Oracle partners presenting on their successes with transforming their customers by connecting people, processes, and content: Deloitte - Collaboration and Web 2.0 Technologies in Supporting Healthcare, delivered by Mike Matthews, the Canadian Healthcare partner and mandate partner on Canadian Partnership Against Cancer at Deloitte InfoSys - Leverage Enterprise 2.0 and SOA Paradigms in Building the Next Generation Business Platforms, delivered by Rizwan MK, who heads InfoSys' Oracle technology delivery business unit, defining and delivering strategic business and technology solutions to Infosys clients involving Oracle applications Capgemini - Simplifying the workflow process for work order management in the utility market, delivered by Léon Smiers, a Solution Architect for Capgemini. Wipro - Oracle BPM in Banking and Financial Services - Wipro's Technology and Implementation Expertise, delivered by Gopalakrishna Bylahalli, who is responsible for the Transformation Practice in Wipro which includes Business Process Transformation, Application Transformation and Information connect. In Mike Matthews’ session, one thing he will explore is how to CPAC has brought together an informational website and a community. CPAC has implemented Oracle WebCenter, and as part of that implementation, is providing a community where people can make connections and share their stories. This community is part of the CPAC website, which provides information of all types on cancer. This make CPAC a one-stop shop for the most up-to-date information in Canada.

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  • How to protect UI components using OPSS Resource Permissions

    - by frank.nimphius
    v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} Normal 0 false false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} table.MsoTableGrid {mso-style-name:"Table Grid"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-priority:59; mso-style-unhide:no; border:solid black 1.0pt; mso-border-alt:solid black .5pt; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-border-insideh:.5pt solid black; mso-border-insidev:.5pt solid black; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman","serif";} ADF security protects ADF bound pages, bounded task flows and ADF Business Components entities with framework specific JAAS permissions classes (RegionPermission, TaskFlowPermission and EntityPermission). If used in combination with the ADF security expression language and security checks performed in Java, this protection already provides you with fine grained access control that can also be used to secure UI components like buttons and input text field. For example, the EL shown below disables the user profile panel tabs for unauthenticated users: <af:panelTabbed id="pt1" position="above">   ...   <af:showDetailItem        text="User Profile" id="sdi2"                                       disabled="#{!securityContext.authenticated}">   </af:showDetailItem>   ... </af:panelTabbed> The next example disables a panel tab item if the authenticated user is not granted access to the bounded task flow exposed in a region on this tab: <af:panelTabbed id="pt1" position="above">   ...   <af:showDetailItem text="Employees Overview" id="sdi4"                        disabled="#{!securityContext.taskflowViewable         ['/WEB-INF/EmployeeUpdateFlow.xml#EmployeeUpdateFlow']}">   </af:showDetailItem>   ... </af:panelTabbed> Security expressions like shown above allow developers to check the user permission, authentication and role membership status before showing UI components. Similar, using Java, developers can use code like shown below to verify the user authentication status: ADFContext adfContext = ADFContext.getCurrent(); SecurityContext securityCtx = adfContext.getSecurityContext(); boolean userAuthenticated = securityCtx.isAuthenticated(); Note that the Java code lines use the same security context reference that is used with expression language. But is this all that there is? No ! The goal of ADF Security is to enable all ADF developers to build secure web application with JAAS (Java Authentication and Authorization Service). For this, more fine grained protection can be defined using the ResourcePermission, a generic JAAS permission class owned by the Oracle Platform Security Services (OPSS).  Using the ResourcePermission  class, developers can grant permission to functional parts of an application that are not protected by page or task flow security. For example, an application menu allows creating and canceling product shipments to customers. However, only a specific user group - or application role, which is the better way to use ADF Security - is allowed to cancel a shipment. To enforce this rule, a permission is needed that can be used declaratively on the UI to hide a menu entry and programmatically in Java to check the user permission before the action is performed. Note that multiple lines of defense are what you should implement in your application development. Don't just rely on UI protection through hidden or disabled command options. To create menu protection permission for an ADF Security enable application, you choose Application | Secure | Resource Grants from the Oracle JDeveloper menu. The opened editor shows a visual representation of the jazn-data.xml file that is used at design time to define security policies and user identities for testing. An option in the Resource Grants section is to create a new Resource Type. A list of pre-defined types exists for you to create policy definitions for. Many of these pre-defined types use the ResourcePermission class. To create a custom Resource Type, for example to protect application menu functions, you click the green plus icon next to the Resource Type select list. The Create Resource Type editor that opens allows you to add a name for the resource type, a display name that is shown when granting resource permissions and a description. The ResourcePermission class name is already set. In the menu protection sample, you add the following information: Name: MenuProtection Display Name: Menu Protection Description: Permission to grant menu item permissions OK the dialog to close the resource permission creation. To create a resource policy that can be used to check user permissions at runtime, click the green plus icon in the Resources section of the Resource Grants section. In the Create Resource dialog, provide a name for the menu option you want to protect. To protect the cancel shipment menu option, create a resource with the following settings Resource Type: Menu Protection Name: Cancel Shipment Display Name: Cancel Shipment Description: Grant allows user to cancel customer good shipment   A new resource Cancel Shipmentis added to the Resources panel. Initially the resource is not granted to any user, enterprise or application role. To grant the resource, click the green plus icon in the Granted To section, select the Add Application Role option and choose one or more application roles in the opened dialog. Finally, you click the process action to define the policy. Note that permission can have multiple actions that you can grant individually to users and roles. The cancel shipment permission for example could have another action "view" defined to determine which user should see that this option exist and which users don't. To use the cancel shipment permission, select the disabled property on a command item, like af:commandMenuItem and click the arrow icon on the right. From the context menu, choose the Expression Builder entry. Expand the ADF Bindings | securityContext node and click the userGrantedResource option. Hint: You can expand the Description panel below the EL selection panel to see an example of how the grant should look like. The EL that is created needs to be manually edited to show as #{!securityContext.userGrantedResource[               'resourceName=Cancel Shipment;resourceType=MenuProtection;action=process']} OK the dialog so the permission checking EL is added as a value to the disabled property. Running the application and expanding the Shipment menu shows the Cancel Shipments menu item disabled for all users that don't have the custom menu protection resource permission granted. Note: Following the steps listed above, you create a JAAS permission and declaratively configure it for function security in an ADF application. Do you need to understand JAAS for this? No!  This is one of the benefits that you gain from using the ADF development framework. To implement multi lines of defense for your application, the action performed when clicking the enabled "Cancel Shipments" option should also check if the authenticated user is allowed to use process it. For this, code as shown below can be used in a managed bean public void onCancelShipment(ActionEvent actionEvent) {       SecurityContext securityCtx =       ADFContext.getCurrent().getSecurityContext();   //create instance of ResourcePermission(String type, String name,   //String action)   ResourcePermission resourcePermission =     new ResourcePermission("MenuProtection","Cancel Shipment",                            "process");        boolean userHasPermission =          securityCtx.hasPermission(resourcePermission);   if (userHasPermission){       //execute privileged logic here   } } Note: To learn more abput ADF Security, visit http://download.oracle.com/docs/cd/E17904_01/web.1111/b31974/adding_security.htm#BGBGJEAHNote: A monthly summary of OTN Harvest blog postings can be downloaded from ADF Code Corner. The monthly summary is a PDF document that contains supporting screen shots for some of the postings: http://www.oracle.com/technetwork/developer-tools/adf/learnmore/index-101235.html

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  • How do developers verify that software requirement changes in one system do not violate a requirement of downstream software systems?

    - by Peter Smith
    In my work, I do requirements gathering, analysis and design of business solutions in addition to coding. There are multiple software systems and packages, and developers are expected to work on any of them, instead of being assigned to make changes to only 1 system or just a few systems. How developers ensure they have captured all of the necessary requirements and resolved any conflicting requirements? An example of this type of scenario: Bob the developer is asked to modify the problem ticket system for a hypothetical utility repair business. They contract with a local utility company to provide this service. The old system provides a mechanism for an external customer to create a ticket indicating a problem with utility service at a particular address. There is a scheduling system and an invoicing system that is dependent on this data. Bob's new project is to modify the ticket placement system to allow for multiple addresses to entered by a landlord or other end customer with multiple properties. The invoicing system bills per ticket, but should be modified to bill per address. What practices would help Bob discover that the invoicing system needs to be changed as well? How might Bob discover what other systems in his company might need to be changed in order to support the new changes\business model? Let's say there is a documented specification for each system involved, but there are many systems and Bob is not familiar with all of them. End of example. We're often in this scenario, and we do have design reviews but management places ultimate responsibility for any defects (business process or software process) on the developer who is doing the design and the work. Some organizations seem to be better at this than others. How do they manage to detect and solve conflicting or incomplete requirements across software systems? We currently have a lot of tribal knowledge and just a few developers who understand the entire business and software chain. This seems highly ineffective and leads to problems at the requirements level.

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  • agile as our first project management methodology [closed]

    - by Hasan Khan
    we are a small web development company that has till now been working on client projects. we employed little to no project management and that has cost us a lot. we've used only the barest of tools (wireframing, prototyping etc) but no formal project management process has been put into place. we've learnt from our mistakes and want to prevent them from happening in the future. also, we are looking to develop our own products and we understand that putting in a proper project management paradigm will help. after a lot of research, we've sort of settled on agile for a few reasons: agile seems to scale well with team size. our team is small right now and we hope to grow and agile seems to be a process that we can put in place now and grow with. agile will help us with customers who just can't seem to make up their minds and keep changing requirements. we'd appreciate the community's thoughts on this. is this a correct way to think? will agile be a good system to put into place, where there has been none till now? are there any resources that may help us in our position? pretty much all of the resources that we've found start by comparing agile to x (where x = any management methodology) and why its better than x and how agile can be implemented in place of x. we're looking for resources that can help us out in our particular situation. thanks for all your help!

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  • Memory consumption of each accept() call on server running on Windows 2008 [migrated]

    - by Atul
    I've written a simple and small server application on Windows 2008 that just accepts connections and does nothing else. I am doing memory footprint assessment of socket calls, What I found that each connection (after accept()) consumes at least 2.5 KB of memory. Interestingly, the memory is not consumed by the process that has accept() call but it consumed by a OS process. I believe it might be because of data structures being created inside OS for each connection. Now, I have two key questions: Is it possible by any means to reduce this memory footprint (by changing any parameters, configuration etc) ? If yes how ? (Because 2K for each connection would be too much if we planning server to accept millions of connections) If my server is intended to accept million connections, is it good idea to use Windows 2008 ? or shall I switch to some other OS? Please advice me.

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  • what software will rip a CD to flac files in one step?

    - by jcollum
    I'm using EAC to rip files to FLAC. Seems fine. But for a large amount of CDs (200 or so) the process is a little labor intensive. There's 4 or 5 clicks in there that seem extraneous -- EAC seems to want to rip the CD to a set of WAV files then (after all those files are ripped) I have to select "Process WAV files" (I'd get it exact, but EAC is occupied right now). I'd like to send all of it to FLAC files in just a few steps: get cddb info, select art, rip. Is there a way to do this with EAC that I'm missing? Haven't been able to find anything on the web that explains this. Is there a better program for this?

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