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• Connection error in java website. Tnsping shows that the service is running

  - by user1439090

  I have a java website application running in windows 7 which uses oracle database for its functionalities. The database has default SID name orcl. When I use tnsping, I can see that the orcl service is active. Also most of the application is working fine except for one part. I was wondering if someone could help me with the following error:- 1. cause: message:null,java.lang.reflect.InvocationTargetException at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at org.olat.course.statistic.StatisticAutoCreator.createController(StatisticAutoCreator.java:73) at org.olat.course.statistic.StatisticActionExtension.createController(StatisticActionExtension.java:40) at org.olat.course.statistic.StatisticMainController.createController(StatisticMainController.java:80) at org.olat.core.gui.control.generic.layout.GenericMainController.getContentCtr(GenericMainController.java:258) at org.olat.core.gui.control.generic.layout.GenericMainController.event(GenericMainController.java:221) at org.olat.core.gui.control.DefaultController.dispatchEvent(DefaultController.java:196) 2. cause: message:Could not get JDBC Connection; nested exception is java.sql.SQLException: The Network Adapter could not establish the connection,org.springframework.jdbc.CannotGetJdbcConnectionException at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:80) at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:381) at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:455) at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:463) at org.springframework.jdbc.core.JdbcTemplate.queryForObject(JdbcTemplate.java:471) at org.springframework.jdbc.core.JdbcTemplate.queryForObject(JdbcTemplate.java:476) at org.springframework.jdbc.core.JdbcTemplate.queryForLong(JdbcTemplate.java:480) at org.olat.course.statistic.SimpleStatisticInfoHelper.doGetFirstLoggingTableCreationDate(SimpleStatisticInfoHelper.java:63) at org.olat.course.statistic.SimpleStatisticInfoHelper.getFirstLoggingTableCreationDate(SimpleStatisticInfoHelper.java:81) at org.olat.course.statistic.StatisticDisplayController.getStatsSinceStr(StatisticDisplayController.java:517) 3. cause: message:The Network Adapter could not establish the connection,java.sql.SQLException at oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:70) at oracle.jdbc.driver.DatabaseError.newSQLException(DatabaseError.java:133) at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:199) at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:480) at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:413) at oracle.jdbc.driver.PhysicalConnection.(PhysicalConnection.java:508) at oracle.jdbc.driver.T4CConnection.(T4CConnection.java:203) at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:33) at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:510) at java.sql.DriverManager.getConnection(DriverManager.java:582) 4. cause: message:The Network Adapter could not establish the connection,oracle.net.ns.NetException at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:328) at oracle.net.resolver.AddrResolution.resolveAndExecute(AddrResolution.java:421) at oracle.net.ns.NSProtocol.establishConnection(NSProtocol.java:634) at oracle.net.ns.NSProtocol.connect(NSProtocol.java:208) at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:966) at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:292) at oracle.jdbc.driver.PhysicalConnection.(PhysicalConnection.java:508) at oracle.jdbc.driver.T4CConnection.(T4CConnection.java:203) at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:33) at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:510) 5. cause: message:Connection timed out: connect,java.net.ConnectException at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333) at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366) at java.net.Socket.connect(Socket.java:525) at java.net.Socket.connect(Socket.java:475) at java.net.Socket.(Socket.java:372) at java.net.Socket.(Socket.java:186) at oracle.net.nt.TcpNTAdapter.connect(TcpNTAdapter.java:127)

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• Windows Service needs to wait, Thread.Sleep?

  - by Dan

  I have a c# windows service that needs to execute a database query every 60 seconds (or whatever interval is set in the config file). I'm using Thread.sleep(60) in a while loop to accomplish this. Is there a better way to do this? Thanks

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• Using IN with sets of tuples in SQL (SQLite3)

  - by gotgenes

  I have the following table in a SQLite3 database: CREATE TABLE overlap_results ( neighbors_of_annotation varchar(20), other_annotation varchar(20), set1_size INTEGER, set2_size INTEGER, jaccard REAL, p_value REAL, bh_corrected_p_value REAL, PRIMARY KEY (neighbors_of_annotation, other_annotation) ); I would like to perform the following query: SELECT * FROM overlap_results WHERE (neighbors_of_annotation, other_annotation) IN (('16070', '8150'), ('16070', '44697')); That is, I have a couple of tuples of annotation IDs, and I'd like to fetch records for each of those tuples. The sqlite3 prompt gives me the following error: SQL error: near ",": syntax error How do I properly express this as a SQL statement?

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• XPath find element based on ancestor element

  - by martymcfly

  Hi, again I have Java AST which is created from public class Test { String o = new String("hh"); public void wrong1() { synchronized(o) { // huhu } } } I try to create a XPath query which finds the synchronized block in which the defined String variable o is used. As the definition is above it is an ancestor of the SynchronizedStatement, but I dont get it working //SynchronizedStatement[Expression/PrimaryExpression/PrimaryPrefix/Name[@Image=ancestor::ClassOrInterfaceBody[ClassOrInterfaceBodyDeclaration/FieldVariableDeclaratorId/@Image]]] I know that /SynchronizedStatement[Expression/PrimaryExpression/PrimaryPrefix/Name[@Image= is correct, my problem is how to address the ancestor ClassOrInterfaceBody part. Hope its clear what i mean ;-) Thanks

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• querying for timestamp field in django

  - by Hulk

  In my views i have the date in the following format s_date=20090106 and e_date=20100106 The model is defined as class Activity(models.Model): timestamp = models.DateTimeField(auto_now_add=True) how to query for the timestamp filed with the above info. Activity.objects.filter(timestamp>=s_date and timestamp<=e_date) Thanks.....

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• Hibernate criteria DB2 composite keys in IN clause

  - by nkr1pt

  Hibernate criteria, using DB2 dialect, generates the following sql with composite keys in the IN clause, but DB2 answers that the query is incorrect: select * from tableA where (x, y) IN ( ( 'x1', y1) ) but, DB2 throws this: SQL0104N An unexpected token "," was found following ", y) in ( ('x1'". Expected tokens may include: "+". SQLSTATE=42601

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• Sql Server Select Command and too much data sent to winforms application

  - by ThanosPapathanasiou

  When you have an application and send a select command, the sql server gathers all the data and sends them back to your application and fills your datagrid (for example) If you performed the same select command in sql management studio, immediately as the query starts running and finding data the results panel would start filling with the data found. How can I do that for my winforms application? Is there a technique or a standard method of doing something like this? Links to good examples would be an immense help. thanks

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• Hard link and Symbolic links in Unix

  - by darkie15

  Hi All, I just wanted to clarify if a hard/symbolic link is actually a file that is created ?? I ran the command: ln source hardlink ln -s source softlink -- The ls command shows this 2 links as a file. So my query is, does ln / ln -s actually create a file? Regards, Shyam

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• Set HTML dropdown selected option using JSTL

  - by sarah

  In the same context i have another query ${productSubCategoryList} and the corresponding setting in request is like for(int i=0;i } here i have multiple select drop down ,even though i get the return value from for as two ,in the UI only one data is getting higlighted not the second one,What is wrong in the code ?

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• Count number of queries executed by NHibernate in a unit test

  - by Bittercoder

  In some unit/integration tests of the code we wish to check that correct usage of the second level cache is being employed by our code. Based on the code presented by Ayende here: http://ayende.com/Blog/archive/2006/09/07/MeasuringNHibernatesQueriesPerPage.aspx I wrote a simple class for doing just that: public class QueryCounter : IDisposable { CountToContextItemsAppender _appender; public int QueryCount { get { return _appender.Count; } } public void Dispose() { var logger = (Logger) LogManager.GetLogger("NHibernate.SQL").Logger; logger.RemoveAppender(_appender); } public static QueryCounter Start() { var logger = (Logger) LogManager.GetLogger("NHibernate.SQL").Logger; lock (logger) { foreach (IAppender existingAppender in logger.Appenders) { if (existingAppender is CountToContextItemsAppender) { var countAppender = (CountToContextItemsAppender) existingAppender; countAppender.Reset(); return new QueryCounter {_appender = (CountToContextItemsAppender) existingAppender}; } } var newAppender = new CountToContextItemsAppender(); logger.AddAppender(newAppender); logger.Level = Level.Debug; logger.Additivity = false; return new QueryCounter {_appender = newAppender}; } } public class CountToContextItemsAppender : IAppender { int _count; public int Count { get { return _count; } } public void Close() { } public void DoAppend(LoggingEvent loggingEvent) { if (string.Empty.Equals(loggingEvent.MessageObject)) return; _count++; } public string Name { get; set; } public void Reset() { _count = 0; } } } With intended usage: using (var counter = QueryCounter.Start()) { // ... do something Assert.Equal(1, counter.QueryCount); // check the query count matches our expectations } But it always returns 0 for Query count. No sql statements are being logged. However if I make use of Nhibernate Profiler and invoke this in my test case: NHibernateProfiler.Intialize() Where NHProf uses a similar approach to capture logging output from NHibernate for analysis via log4net etc. then my QueryCounter starts working. It looks like I'm missing something in my code to get log4net configured correctly for logging nhibernate sql ... does anyone have any pointers on what else I need to do to get sql logging output from Nhibernate?

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• MVC model flow?

  - by fuzzygoat

  I am setting up an application using the MVC model and I have a query regrading the flow of information from the UI to the data model. What I need to do is place data from the UI in the model, what I have done is write a method in the view which collects the required data in an object and then passes it to the model. The model then takes ownership of the data so that the view can release its ownership. Does this sound sensible?

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• <cfquery> not retrieving DATA.

  - by Somnath Reddy

  Hi, I am unable to retrieve any data from my cfquery. Same query when i run in sql developer i get the result. Any reason why ?

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• Create a user-defined aggregate without SQL CLR

  - by David Pfeffer

  I am planning on deploying a database to SQL Azure, so I cannot use the SQL CLR. However, I have a need to create an aggregate function -- in my case, I need to STUnion a bunch of Geography objects together. (Azure is expected to support Spatial by June.) Is there another way to accomplish this, without making use of the CLR, in a query? Or do I have to create a UDF that will take a table as a parameter and return the aggregate?

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• How to use Contains() in my join

  - by jrep...

  I am trying to get my linq query to replicate my t-sql but I am lost. SELECT * FROM BaiDetail INNER JOIN BaiDetailMap ON BaiDetail.DetailText LIKE '%' + BaiDetailMap.BaiDetailMapSearchText +'%' This is what I have so far... but no go from det in Source from map in Map where det.DetailText.Contains(map.SearchText) select new {det, map} Error Message: Only arguments that can be evaluated on the client are supported for the String.Contains method.

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• Setting SQL Relationships For LINQ Queries

  - by Soo

  I have two tables that I'm trying to create a relationship between so I can write nice LINQ queries that don't require join. Widgets WidgetId WidgetDescription Orders OrderId WidgetId OrderDate What I want to be able to do is create a LINQ query that does something similar to: var result = from x in db.Widgets Where x.Orders.OrderDate == "5/11/2010" select x; I can't seem to get intellitext to pick up the other database despite creating a relationship in SQL server. Are there any additional steps I need to take to make this work?

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• How effective are technical test(s) and is it necessary?

  - by The Elite Gentleman

  Hi everyone, I recently took a Java technical test (for a company who wanted are looking for senior java developers) and, funny enough, I only realised the technical terms of what I've been doing all along after I've written the test. I'm not too IT jargon when it comes to development but I can pretty much code and create solutions unaware that I'm using design pattern (or the specifics of that design pattern) or technology. I learned things such as JMS, Frameworks, etc. while programming at home and having to google stuff online to problems I have. Others e.g. IoC, Surrogates in Databases, etc., I have used extensively without knowing that it had a name for it. Do you think that these technical test are effective and why? What interesting questions did you find that boggled your brains out while the clock kept ticking? Seeing that IT is vastly evolving at a rapid rate, do we have to constantly be updated with new terms that comes out? Some questions I was asked : What object oriented principle is violated by this architectural mechanism for dot notation? Is indexing tables effective for range query or point query search? What is ThreadLocal and what is it used for? Method overloading vs Method overriding. What is the difference between the 2? What is dynamic binding? Now, imagine my poor head trying to understand these jargons (considering I use it almost everyday) PS The question was not a programming question, where you have a problem and write code to solve it. Rather, a thinking type question and you write answers (against the clock). Update I clearly didn't come out clearly as I should have. There are those that are technically "book smart" but with very little hands-on experience and vice versa. So, the question (in connection to what I've asked) is that are these technical test seeking "book smart" people or people with lots of hands-on experience (some who are not that well clued up with too much book-smart jargons). How effective is it then, for companies to look for developers if most of the questions are too terminology-centric? (if that's the correct term, :))

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• ASP.NET MVC & EF4 Entity Framework - Are there any performance concerns in using the entities vs retrieving only the fields i need?

  - by Ant

  Lets say we have 3 tables, Users, Products, Purchases. There is a view that needs to display the purchases made by a user. I could lookup the data required by doing: from p in DBSet<Purchases>.Include("User").Include("Product") select p; However, I am concern that this may have a performance impact because it will retrieve the full objects. Alternatively, I could select only the fields i need: from p in DBSet<Purchases>.Include("User").Include("Product") select new SimplePurchaseInfo() { UserName = p.User.name, Userid = p.User.Id, ProductName = p.Product.Name ... etc }; So my question is: Whats the best practice in doing this? == EDIT Thanks for all the replies. [QUESTION 1]: I want to know whether all views should work with flat ViewModels with very specific data for that view, or should the ViewModels contain the entity objects. Real example: User reviews Products var query = from dr in productRepository.FindAllReviews() where dr.User.UserId = 'userid' select dr; string sql = ((ObjectQuery)query).ToTraceString(); SELECT [Extent1].[ProductId] AS [ProductId], [Extent1].[Comment] AS [Comment], [Extent1].[CreatedTime] AS [CreatedTime], [Extent1].[Id] AS [Id], [Extent1].[Rating] AS [Rating], [Extent1].[UserId] AS [UserId], [Extent3].[CreatedTime] AS [CreatedTime1], [Extent3].[CreatorId] AS [CreatorId], [Extent3].[Description] AS [Description], [Extent3].[Id] AS [Id1], [Extent3].[Name] AS [Name], [Extent3].[Price] AS [Price], [Extent3].[Rating] AS [Rating1], [Extent3].[ShopId] AS [ShopId], [Extent3].[Thumbnail] AS [Thumbnail], [Extent3].[Creator_UserId] AS [Creator_UserId], [Extent4].[Comment] AS [Comment1], [Extent4].[DateCreated] AS [DateCreated], [Extent4].[DateLastActivity] AS [DateLastActivity], [Extent4].[DateLastLogin] AS [DateLastLogin], [Extent4].[DateLastPasswordChange] AS [DateLastPasswordChange], [Extent4].[Email] AS [Email], [Extent4].[Enabled] AS [Enabled], [Extent4].[PasswordHash] AS [PasswordHash], [Extent4].[PasswordSalt] AS [PasswordSalt], [Extent4].[ScreenName] AS [ScreenName], [Extent4].[Thumbnail] AS [Thumbnail1], [Extent4].[UserId] AS [UserId1], [Extent4].[UserName] AS [UserName] FROM [ProductReviews] AS [Extent1] INNER JOIN [Users] AS [Extent2] ON [Extent1].[UserId] = [Extent2].[UserId] LEFT OUTER JOIN [Products] AS [Extent3] ON [Extent1].[ProductId] = [Extent3].[Id] LEFT OUTER JOIN [Users] AS [Extent4] ON [Extent1].[UserId] = [Extent4].[UserId] WHERE N'615005822' = [Extent2].[UserId] or from d in productRepository.FindAllProducts() from dr in d.ProductReviews where dr.User.UserId == 'userid' orderby dr.CreatedTime select new ProductReviewInfo() { product = new SimpleProductInfo() { Id = d.Id, Name = d.Name, Thumbnail = d.Thumbnail, Rating = d.Rating }, Rating = dr.Rating, Comment = dr.Comment, UserId = dr.UserId, UserScreenName = dr.User.ScreenName, UserThumbnail = dr.User.Thumbnail, CreateTime = dr.CreatedTime }; SELECT [Extent1].[Id] AS [Id], [Extent1].[Name] AS [Name], [Extent1].[Thumbnail] AS [Thumbnail], [Extent1].[Rating] AS [Rating], [Extent2].[Rating] AS [Rating1], [Extent2].[Comment] AS [Comment], [Extent2].[UserId] AS [UserId], [Extent4].[ScreenName] AS [ScreenName], [Extent4].[Thumbnail] AS [Thumbnail1], [Extent2].[CreatedTime] AS [CreatedTime] FROM [Products] AS [Extent1] INNER JOIN [ProductReviews] AS [Extent2] ON [Extent1].[Id] = [Extent2].[ProductId] INNER JOIN [Users] AS [Extent3] ON [Extent2].[UserId] = [Extent3].[UserId] LEFT OUTER JOIN [Users] AS [Extent4] ON [Extent2].[UserId] = [Extent4].[UserId] WHERE N'userid' = [Extent3].[UserId] ORDER BY [Extent2].[CreatedTime] ASC [QUESTION 2]: Whats with the ugly outer joins?

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• Error: FormatException was unhandled by user code in Linq how to solve?

  - by programmerist

  Look please below this codes throw me : FormatException was unhandled by user code Codes: satis.KDV = Decimal.Parse((from o in genSatisctx.Urun where o.ID == UrunID select o.Kdv).ToString()); How can i rewrite linq query?

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• Programicaly measure size and way-order of L1 and L2 caches

  - by osgx

  Hello How can I measure programicaly (not query the OS, but measure) the size and order of associativity of L1 and L2 caches (data caches)? Assumtions about system: It has L1 and L2 cache (may be L3 too, may be cache sharing), It may have a hardware prefetch unit (just like P4+), it has a stable clocksource (tickcounter or good HPET for gettimeofday). There are no assumtions about OS (it can be Linux, Windows, smth non-standart), and we can't use posix queries. Language is C. And Compiler optimizations may be disabled.

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• execute procedure for a sequence of elements (execute theProc (select id from table))

  - by Omu

  I need to execute the procedure deleteQuestion for each element that was returned by this select query: select id from questions where Stuff = @Stuff execute deleteQuestion id something like: execute deleteQuestion each(select id fom questions where Stuff = @Stuff) anybody knows how ?

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• How to write it in LINQ?

  - by Veejay

  I am writing the following in LINQ .Select(n = n/10 == 1) but it's not working. How to write the above query?

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• Storing images in MySQL

  - by gautam kumar

  Please give me the query for inserting images in a MySQL database. I am new to stackoverflow, so please ignore me if my question is not up to mark.

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• .NET - Very strange NullReferenceException?

  - by ropstah

  How can I get a NullReferenceException in the following scenario? Dim langs As IEnumerable(Of SomeCustomObject) = //some LINQ query If langs Is Nothing Then Return Nothing If langs.Count = 1 Then //NullReferenceException here What am I missing here? Debug shows that langs is really just a LINQ queryresult without any results...

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• Is there an API or SDK for TomTom satellite navigation devices that would let me access them from Wi

  - by jammycakes

  I was given a TomTom satellite navigation device (XL 30) for Christmas and I've been wondering recently if it is possible to use it as a location sensor for my own programs on my (Windows 7) laptop. Does anyone know if there is a published API which would allow me to do this? More specifically, how can I query it for my current location (latitude, longitude, and, if possible, altitude?)

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• full text search on multiple fields in diferrent tables

  - by crisgomez

  Hi, I want to create a a full text search usng ms sql 2005. here is the structure of my table User-contains fields of Id, fname,lname,email,alternativeemail Attachment-contains fields of id, name,category,filenameorurl Certification-contains of fileds of id, title,school,sdate,edate EducationalBackground-contain of fields of, id,qualification,sdate,edate,school,fieldofstudy EmploymentDetails-contain of fields position, positionlevelid,specializationid,description now the relationship of user to the other table is one to many relationship. now how can I create an effective query to have quick full text search and return the values of the different tables?any help please

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