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• How to manage large number of desktop VMs?

  - by symcbean

  I'm looking at the feasibility of providing remote access to multiple virtual machines. The VMs themselves will provide user desktops. To make best use of the available resources, I'd like the VMs to hibernate when the user disconnects. Which implies being able to start them up when a user connects. Ideally each user would 'own' a VM image - but if not then I'd require that the session was terminated. Obviously this would require the remote access protocol to be tied into the VM management. Is there anything out there to provide such functionality? (extra credit for open protocols! ;)

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• What is hiberfil.sys and How Do I Delete It?

  - by The Geek

  You’re no doubt reading this article because there’s a gigantic hiberfil.sys file sitting in the root of your drive, and you want to get rid of it to free up some space… but you can’t! Luckily, you actually can delete it, and today we’ll show you how. The more memory you have in your PC, the bigger the file will be. So What is hiberfil.sys Anyway? Windows has two power management modes that you can choose from: one is Sleep Mode, which keeps the PC running in a low power state so you can almost instantly get back to what you were working on. The other is Hibernate mode, which completely writes the memory out to the hard drive, and then powers the PC down entirely, so you can even take the battery out, put it back in, start back up, and be right back where you were. Hibernate mode uses the hiberfil.sys file to store the the current state (memory) of the PC, and since it’s managed by Windows, you can’t delete the file. So if you never use it, and want to disable Hibernate mode, keep reading. Personally I stick with Sleep Mode the vast majority of the time, but I do use Hibernate quite often. Disable Hibernate (and Delete hiberfil.sys) in Windows 7 or Vista You’ll need to open an administrator mode command prompt by right-clicking on the command prompt in the start menu, and then choosing Run as Administrator. Once you’re there, type in the following command: powercfg -h off You should immediately notice that the Hibernate option is gone from the Shut down menu. You’ll also notice that the file is magically gone! For more about dealing with Hibernate like setting how long it takes to head into Hibernate mode, you can check out our article on How to Manage Hibernate Mode in Windows 7. Disabling Hibernate Mode in Windows XP It’s a lot easier in Windows XP to get rid of Hibernate mode… in fact, we’ve already covered it before, but we’ll cover it again. Just head into Control Panel –> Power Options, and then find the Hibernate tab. Uncheck the box, reboot your PC, and then you can delete the hiberfil.sys file. Similar Articles Productive Geek Tips How to Delete a System File in Windows 7 or VistaDisable Delete Confirmation Dialog in Windows 7 or VistaClear IE7 Browsing History From the Command LineHide, Delete, or Destroy the Recycle Bin Icon in Windows 7 or VistaClear the Auto-Complete Email Address Cache in Outlook TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips DVDFab 6 Revo Uninstaller Pro Registry Mechanic 9 for Windows PC Tools Internet Security Suite 2010 Whoa ! Use Printflush to Solve Printing Problems Icelandic Volcano Webcams Open Multiple Links At One Go NachoFoto Searches Images in Real-time Office 2010 Product Guides

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• Deleting JPA entity containing @CollectionOfElements throws ConstraintViolationException

  - by Lyle

  I'm trying to delete entities which contain lists of Integer, and I'm getting ConstraintViolationExceptions because of the foreign key on the table generated to hold the integers. It appears that the delete isn't cascading to the mapped collection. I've done quite a bit of searching, but all of the examples I've seen on how to accomplish this are in reference to a mapped collection of other entities which can be annotated; here I'm just storing a list of Integer. Here is the relevant excerpt from the class I'm storing: @Entity @Table(name="CHANGE_IDS") @GenericGenerator( name = "CHANGE_ID_GEN", strategy = "org.hibernate.id.enhanced.SequenceStyleGenerator", parameters = { @Parameter(name="sequence_name", value="course_changes_seq"), @Parameter(name="increment_size", value="5000"), @Parameter(name=" optimizer", value="pooled") } ) @NamedQueries ({ @NamedQuery( name="Changes.getByStatus", query= "SELECT c " + "FROM DChanges c " + "WHERE c.status = :status "), @NamedQuery( name="Changes.deleteByStatus", query= "DELETE " + "FROM Changes c " + "WHERE c.status = :status ") }) public class Changes { @Id @GeneratedValue(generator="CHANGE_ID_GEN") @Column(name = "ID") private final long id; @Enumerated(EnumType.STRING) @Column(name = "STATUS", length = 20, nullable = false) private final Status status; @Column(name="DOC_ID") @org.hibernate.annotations.CollectionOfElements @org.hibernate.annotations.IndexColumn(name="DOC_ID_ORDER") private List<Integer> docIds; } I'm deleting the Changes objects using a @NamedQuery: final Query deleteQuery = this.entityManager.createNamedQuery("Changes.deleteByStatus"); deleteQuery.setParameter("status", Status.POST_FLIP); final int deleted = deleteQuery.executeUpdate(); this.logger.info("Deleted " + deleted + " POST_FLIP Changes");

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• JPA/JDO entity to XML XSD generator.

  - by h2g2java

  I am using JDO or JPA on GAE plugin in Eclipse. I am using smartgwt datasource, accepting an xsd. I would like to be educated how to generate an XSD from my jdo/jpa entity, vice versa. Is there a tool to do it? While datanucleas does all its magic enhancing in the Eclipse background, would I be able to somehow operate in a mode that would generate XSDs for me? Can Hibernate operate in an offline mode, to solely help me generate XSDs which I could use in GWT without deploying hibernate with my web-app? Can Hibernate even be capable of generating XSDs from entities, vice versa? Currently, I am about to write a utility to generate an xsd, given an entity class - but I am hoping I don't have to reinvent the wheel if it already exists. I am hoping people here could educate me on any available tools to ease my XSD generation. But btw, I am very wary of anything that uses Maven, because most people (like Spring) who write the Maven scripts and pom don't have the expertise to write it in a way that would spew out messages and verbosity appropriately to make it easy for me to locate model errors.

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• refering Tomcat JNDI datasource in persistence.xml

  - by binary_runner

  in server.xml I've defined global resource (I'm using Tomcat 6): <GlobalNamingResources> <Resource name="jdbc/myds" auth="Container" type="javax.sql.DataSource" maxActive="10" maxIdle="3" maxWait="10000" username="sa" password="" driverClassName="org.h2.Driver" url="jdbc:h2:~/.myds/data/db" /> </GlobalNamingResources> I see in catalina.out that this is bound, so I suppose it's OK. In my web app I have the link to the datasource, I'm not sure it's OK: <Context> <ResourceLink global='jdbc/myds' name='jdbc/myds' type="javax.sql.Datasource"/> </Context> and in application there is persistence.xml : <persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd" version="2.0"> <persistence-unit name="oam" transaction-type="RESOURCE_LOCAL"> <provider>org.hibernate.ejb.HibernatePersistence</provider> <non-jta-data-source>jdbc/myds</non-jta-data-source> <!-- class definitions here, nothing else --> <properties> <property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect"/> </properties> </persistence-unit> </persistence> It shuld be OK, but most probably this or the ResourceLink definition is wrong because I'm getting: javax.naming.NameNotFoundException: Name jdbc is not bound in this Context What's wrong and why this does not work ?

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• GlassFish can't find persistence provider for EntityManager

  - by Xorty

  Hi, I am building Spring MVC project (2.5). It runs on GlassFish v3 server and I am using Hibernate for ORM mapping from Derby database. I am having trouble with deployment - GlassFish says : No Persistence provider for EntityManager named mvcspringPU. Here is how I create EntityManagerFactory : emf = Persistence.createEntityManagerFactory("mvcspringPU"); And here is my configuration file persistence.xml <?xml version="1.0" encoding="UTF-8"?> <persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"> <persistence-unit name="mvcspringPU" transaction-type="JTA"> <provider>org.hibernate.ejb.HibernatePersistence</provider> <jta-data-source>CarsDB</jta-data-source> <properties> <property name="hibernate.hbm2ddl.auto" value="update"/> </properties> </persistence-unit> </persistence> I am building with NetBeans 6.8, so things like build paths should be alright (generated by IDE itself).

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• @OneToMany and composite primary keys?

  - by Kris Pruden

  Hi, I'm using Hibernate with annotations (in spring), and I have an object which has an ordered, many-to-one relationship which a child object which has a composite primary key, one component of which is a foreign key back to the id of the parent object. The structure looks something like this: +=============+ +================+ | ParentObj | | ObjectChild | +-------------+ 1 0..* +----------------+ | id (pk) |-----------------| parentId | | ... | | name | +=============+ | pos | | ... | +================+ I've tried a variety of combinations of annotations, none of which seem to work. This is the closest I've been able to come up with: @Entity public class ParentObject { @Column(nullable=false, updatable=false) private String id; @OneToMany(mappedBy="object", fetch=FetchType.EAGER) @IndexColumn(name = "pos", base=0) private List<ObjectChild> attrs; ... } @Entity public class ChildObject { @Embeddable public static class Pk implements Serializable { @Column(nullable=false, updatable=false) private String objectId; @Column(nullable=false, updatable=false) private String name; @Column(nullable=false, updatable=false) private int pos; ... } @EmbeddedId private Pk pk; @ManyToOne @JoinColumn(name="parentId") private ParentObject parent; ... } I arrived at this after a long bout of experimentation in which most of my other attempts yielded entities which hibernate couldn't even load for various reasons. The error I get when I try to read one of these objects (they seem to save OK), I get an error of this form: org.hibernate.exception.SQLGrammarException: could not initialize a collection: ... And the root cause is this: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'attrs0_.id' in 'field list' I'm sure I'm missing something simple, but the documentation is not clear on this matter, and I haven't been able to find any examples of this anywhere else. Thanks!

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• Spring 3 MVC validation BindingResult doesn't contain any errors

  - by Travelsized

  I'm attempting to get a Spring 3.0.2 WebMVC project running with the new annotated validation support. I have a Hibernate entity annotated like this: @Entity @Table(name = "client") public class Client implements Serializable { private static final long serialVersionUID = 1L; @Id @Basic(optional = false) @Column(name = "clientId", nullable = false) @NotEmpty private Integer clientId; @Basic(optional = false) @Column(name = "firstname", nullable = false, length = 45) @NotEmpty @Size(min=2, max=45) private String firstname; ... more fields, getters and setters } I've turned on mvc annotation support in my applicationContext.xml file: <mvc:annotation-driven /> And I have a method in my controller that responds to a form submission: @RequestMapping(value="/addClient.htm") public String addClient(@ModelAttribute("client") @Valid Client client, BindingResult result) { if(result.hasErrors()) { return "addClient"; } service.storeClient(client); return "clientResult"; } When my app loads in the server, I can see in the server log file that it loads a validator: 15 [http-8084-2] INFO org.hibernate.validator.util.Version - Hibernate Validator 4.0.2.GA The problem I'm having is that the validator doesn't seem to kick in. I turned on the debugger, and when I get into the controller method, the BindingResult contains 0 errors after I submit an empty form. (The BindingResult does show that it contains the Client object as a target.) It then proceeds to insert a record without an Id and throws an exception. If I fill out an Id but leave the name blank, it creates a record with the Id and empty fields. What steps am I missing to get the validation working?

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• How to get around LazyInitializationException in scheduled jobs?

  - by Shreerang

  I am working on a J2EE server application which is deployed on Tomcat. I use Spring source as MVC framework and Hibernate as ORM provider. My object model has lot of Lazy relationships (dependent objects are fetched on request). The high level design is like Service level methods call a few DAO methods to perform database operation. The service method is called either from the Flex UI or as a scheduled job. When it is called from Flex UI, the service method works fine i.e. it fetches some objects using DAO methods and even Lazy loading works. This is possible by the use of OpenSessionInViewFilter configured with the UI servlet. But when the same service method is called as scheduled Job, it gives LazyInitializationException. I can not configure OpenSessionInViewFilter because there is no servlet or UI request associated with that. I tried configuring Transaction around the scheduled job method so that service method starts a transaction and all the DAO methods participate in that same transaction, hoping that the transaction will remain active and hibernate session will be available. But it does not work. Please suggest if anyone has ever been able to get such a configuration working. If needed, I can post the Hibernate configuration and log messages. Thanks a lot for help! Shreerang

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• Pattern for version-specific implementations of a Java class

  - by Mike Monkiewicz

  So here's my conundrum. I am programming a tool that needs to work on old versions of our application. I have the code to the application, but can not alter any of the classes. To pull information out of our database, I have a DTO of sorts that is populated by Hibernate. It consumes a data object for version 1.0 of our app, cleverly named DataObject. Below is the DTO class. public class MyDTO { private MyWrapperClass wrapper; public MyDTO(DataObject data) { wrapper = new MyWrapperClass(data); } } The DTO is instantiated through a Hibernate query as follows: select new com.foo.bar.MyDTO(t1.data) from mytable t1 Now, a little logic is needed on top of the data object, so I made a wrapper class for it. Note the DTO stores an instance of the wrapper class, not the original data object. public class MyWrapperClass { private DataObject data; public MyWrapperClass(DataObject data) { this.data = data; } public String doSomethingImportant() { ... version-specific logic ... } } This works well until I need to work on version 2.0 of our application. Now DataObject in the two versions are very similar, but not the same. This resulted in different sub classes of MyWrapperClass, which implement their own version-specific doSomethingImportant(). Still doing okay. But how does myDTO instantiate the appropriate version-specific MyWrapperClass? Hibernate is in turn instantiating MyDTO, so it's not like I can @Autowire a dependency in Spring. I would love to reuse MyDTO (and my dozens of other DTOs) for both versions of the tool, without having to duplicate the class. Don't repeat yourself, and all that. I'm sure there's a very simple pattern I'm missing that would help this. Any suggestions?

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• Database PK-FK design for future-effective-date entries?

  - by Scott Balmos

  Ultimately I'm going to convert this into a Hibernate/JPA design. But I wanted to start out from purely a database perspective. We have various tables containing data that is future-effective-dated. Take an employee table with the following pseudo-definition: employee id INT AUTO_INCREMENT ... data fields ... effectiveFrom DATE effectiveTo DATE employee_reviews id INT AUTO_INCREMENT employee_id INT FK employee.id Very simplistic. But let's say Employee A has id = 1, effectiveFrom = 1/1/2011, effectiveTo = 1/1/2099. That employee is going to be changing jobs in the future, which would in theory create a new row, id = 2 with effectiveFrom = 7/1/2011, effectiveTo = 1/1/2099, and id = 1's effectiveTo updated to 6/30/2011. But now, my program would have to go through any table that has a FK relationship to employee every night, and update those FK to reference the newly-effective employee entry. I have seen various postings in both pure SQL and Hibernate forums that I should have a separate employee_versions table, which is where I would have all effective-dated data stored, resulting in the updated pseudo-definition below: employee id INT AUTO_INCREMENT employee_versions id INT AUTO_INCREMENT employee_id INT FK employee.id ... data fields ... effectiveFrom DATE effectiveTo DATE employee_reviews id INT AUTO_INCREMENT employee_id INT FK employee.id Then to get any actual data, one would have to actually select from employee_versions with the proper employee_id and date range. This feels rather unnatural to have this secondary "versions" table for each versioned entity. Anyone have any opinions, suggestions from your own prior work, etc? Like I said, I'm taking this purely from a general SQL design standpoint first before layering in Hibernate on top. Thanks!

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• How to improve my software project's speed?

  - by Blitzkr1eg

  I'm doing a school software project with my class mates in Java. We store the info on a remote db. When we start the application we pull all the information from the database and transform it into objects to use in our application (using java sql statemens). In the application we edit some of these objects and then when we exit the application we save or update information in the database using Hibernate. As you see we dont use Hibernate for pulling in information, we use it just for saving and updating. We have 2, but very similar problems. The loading of object(when we start the app) and the saving of objects(with Hibernate) in the db(when closing the app) is taking too much time. And our project its not a huge enterprise application, its a quite small app, we just manage some students, teachers, homeworks and tests. So our db is also very very small. How could we increase performance ? later edit: if we use a local database it runs very quick, it just runs slow on remote databases

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• Why can't I reference child entities with part of the parent entities composite key

  - by tigermain

  I am trying to reference some child entities with part of the parents composite key not all of it, why cant I? This happens when I use the following mapping instead of that which is commented. I get the following error Foreign key in table VolatileEventContent must have same number of columns as referenced primary key in table LocationSearchView <?xml version="1.0" encoding="utf-8" ?> <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" namespace="JeanieMaster.Domain.Entities" assembly="JeanieMaster.Domain"> <class name="LocationSearchView" table="LocationSearchView"> <composite-id> <key-property name="LocationId" type="Int32"></key-property> <key-property name="ContentProviderId" type="Int32"></key-property> <key-property name="CategoryId" type="Int32"></key-property> </composite-id> <property name="CompanyName" type="String" not-null="true" update="false" insert="false"/> <property name="Description" type="String" not-null="true" update="false" insert="false"/> <property name="CategoryId" type="Int32" not-null="true" update="false" insert="false"/> <property name="ContentProviderId" type="Int32" not-null="true" update="false" insert="false"/> <property name="LocationId" type="Int32" not-null="true" update="false" insert="false"/> <property name="Latitude" type="Double" update="false" insert="false" /> <property name="Longitude" type="Double" update="false" insert="false" /> <bag name="Events" table="VolatileEventContent" where="DeactivatedOn IS NULL" order-by="StartDate DESC" lazy="false" cascade="none"> <key> <column name="LocationId"></column> <column name="ContentProviderId"></column> <!--<column name="LocationId"></column> <column name="ContentProviderId"></column> <column name="CategoryId"></column>--> </key> <one-to-many class="Event" column="VolatileEventContentId"></one-to-many> </bag> </class> </hibernate-mapping> And VolatileEventContent mapping file <?xml version="1.0" encoding="utf-8" ?> <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" namespace="JeanieMaster.Domain.Entities" assembly="JeanieMaster.Domain"> <class name="Event" table="VolatileEventContent" select-before-update="false" optimistic-lock="none"> <composite-id> <key-property name="LocationId" type="Int32"></key-property> <key-property name="ContentProviderId" type="Int32"></key-property> </composite-id> <property name="Description" type="String" not-null="true" update="false" insert="false"/> <property name="StartDate" type="DateTime" not-null="true" update="false" insert="false" /> <property name="EndDate" type="DateTime" not-null="true" update="false" insert="false" /> <property name="CreatedOn" type="DateTime" not-null="true" update="false" insert="false" /> <property name="ModifiedOn" type="DateTime" not-null="false" update="false" insert="false" /> <many-to-one name="Location" class="Location" column="LocationId" /> <bag name="Artistes" table="EventArtiste" lazy="false" cascade="none"> <key name="VolatileEventContentId" /> <many-to-many class="Artiste" column="ArtisteId" ></many-to-many> </bag> </class> </hibernate-mapping>

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• AbstractMethodError on org.apache.xalan.processor.TransformerFactoryImpl

  - by JBristow

  With the following code: private Document transformDoc(Source source) throws TransformerException, IOException { Transformer xslTransformer = TransformerFactory.newInstance().newTransformer(new StreamSource(pdfTransformXslt.getInputStream())); xslTransformer.setParameter("http://apache.org/xml/features/nonvalidating/load-external-dtd", false); xslTransformer.setParameter("http://xml.org/sax/features/validation", false); JDOMResult result = new JDOMResult(); xslTransformer.transform(source, result); return result.getDocument(); } I'm getting the following error: java.lang.AbstractMethodError: org.apache.xalan.processor.TransformerFactoryImpl.setFeature(Ljava/lang/String;Z)V Why is this? Here's my Maven dependency tree: ------------------------------------------------------------------------ Building mc-hub-batch task-segment: [dependency:tree] ------------------------------------------------------------------------ snapshot com.billmelater:mc-test-support:2.0.0.11-SNAPSHOT: checking for updates from repository.jboss.org [dependency:tree {execution: default-cli}] com.billmelater:mc-hub-batch:jar:2.0.0.11-SNAPSHOT +- com.billmelater:mc-hub-core:jar:2.0.0.11-SNAPSHOT:compile | +- commons-lang:commons-lang:jar:2.4:compile | +- commons-collections:commons-collections:jar:3.2.1:compile | +- commons-beanutils:commons-beanutils:jar:1.8.0:compile | +- commons-digester:commons-digester:jar:2.0:compile | | +- (commons-beanutils:commons-beanutils:jar:1.8.0:compile - omitted for duplicate) | | \- (commons-logging:commons-logging:jar:1.1.1:compile - version managed from 1.0.4; omitted for duplicate) | \- (org.springframework.batch:spring-batch-core:jar:2.0.2.RELEASE:compile - omitted for duplicate) +- com.billmelater:mc-test-support:jar:2.0.0.11-SNAPSHOT:test | +- (com.billmelater:mc-hub-core:jar:2.0.0.11-SNAPSHOT:test - omitted for duplicate) | +- (org.springframework:spring:jar:2.5.6:test - omitted for duplicate) | +- org.springframework:spring-jdbc:jar:2.5.6.SEC01:test | | +- (commons-logging:commons-logging:jar:1.1.1:test - omitted for duplicate) | | +- (org.springframework:spring-beans:jar:2.5.6.SEC01:test - omitted for conflict with 2.5.6) | | +- (org.springframework:spring-context:jar:2.5.6.SEC01:test - omitted for conflict with 2.5.6) | | +- (org.springframework:spring-core:jar:2.5.6.SEC01:test - omitted for conflict with 2.5.6) | | \- (org.springframework:spring-tx:jar:2.5.6.SEC01:test - omitted for conflict with 2.5.6) | +- (org.dbunit:dbunit:jar:2.4.5:test - omitted for duplicate) | +- (log4j:log4j:jar:1.2.15:test - omitted for duplicate) | +- (org.slf4j:slf4j-api:jar:1.5.6:compile - version managed from 1.5.8; scope updated from test; omitted for duplicate) | +- (org.slf4j:slf4j-log4j12:jar:1.5.6:test - omitted for duplicate) | +- org.jboss.seam:jboss-seam:jar:2.2.0.GA:test | | +- xstream:xstream:jar:1.1.3:test | | +- (xpp3:xpp3_min:jar:1.1.3.4.O:compile - scope updated from test; omitted for duplicate) | | \- org.jboss.el:jboss-el:jar:1.0_02.CR4:test | +- (org.testng:testng:jar:jdk15:5.8:test - omitted for duplicate) | +- (org.hibernate:hibernate-core:jar:3.3.2.GA:test - version managed from 3.3.0.SP1; omitted for duplicate) | +- org.hibernate:hibernate-entitymanager:jar:3.4.0.GA:test | | +- (org.hibernate:ejb3-persistence:jar:1.0.2.GA:test - omitted for duplicate) | | +- (org.hibernate:hibernate-commons-annotations:jar:3.1.0.GA:test - omitted for duplicate) | | +- (org.hibernate:hibernate-annotations:jar:3.4.0.GA:test - omitted for duplicate) | | +- (org.hibernate:hibernate-core:jar:3.3.2.GA:test - version managed from 3.3.0.SP1; omitted for duplicate) | | +- (org.slf4j:slf4j-api:jar:1.5.6:test - version managed from 1.4.2; omitted for duplicate) | | +- (dom4j:dom4j:jar:1.6.1-jboss:test - version managed from 1.6.1; omitted for duplicate) | | +- (javax.transaction:jta:jar:1.0.1B:test - version managed from 1.1; omitted for duplicate) | | \- javassist:javassist:jar:3.4.GA:test | +- (org.hibernate:hibernate-validator:jar:3.1.0.GA:test - omitted for duplicate) | +- (org.apache.velocity:velocity:jar:1.6.2:test - omitted for duplicate) | \- (ojdbc:ojdbc:jar:14:test - omitted for duplicate) +- org.springframework:spring:jar:2.5.6:compile +- org.springframework.batch:spring-batch-core:jar:2.0.2.RELEASE:compile | +- org.springframework.batch:spring-batch-infrastructure:jar:2.0.2.RELEASE:compile | | +- (commons-logging:commons-logging:jar:1.1.1:compile - omitted for duplicate) | | +- (org.springframework:spring-core:jar:2.5.6:compile - omitted for duplicate) | | \- (stax:stax:jar:1.2.0:compile - omitted for duplicate) | +- org.aspectj:aspectjrt:jar:1.5.4:compile | +- org.aspectj:aspectjweaver:jar:1.5.4:compile | +- com.thoughtworks.xstream:xstream:jar:1.3:compile | | \- xpp3:xpp3_min:jar:1.1.4c:compile | +- org.codehaus.jettison:jettison:jar:1.0:compile | +- org.springframework:spring-aop:jar:2.5.6:compile | | +- aopalliance:aopalliance:jar:1.0:compile | | +- (commons-logging:commons-logging:jar:1.1.1:compile - omitted for duplicate) | | +- (org.springframework:spring-beans:jar:2.5.6:compile - omitted for duplicate) | | \- (org.springframework:spring-core:jar:2.5.6:compile - omitted for duplicate) | +- org.springframework:spring-beans:jar:2.5.6:compile | | +- (commons-logging:commons-logging:jar:1.1.1:compile - omitted for duplicate) | | \- (org.springframework:spring-core:jar:2.5.6:compile - omitted for duplicate) | +- org.springframework:spring-context:jar:2.5.6:compile | | +- (aopalliance:aopalliance:jar:1.0:compile - omitted for duplicate) | | +- (commons-logging:commons-logging:jar:1.1.1:compile - omitted for duplicate) | | +- (org.springframework:spring-beans:jar:2.5.6:compile - omitted for duplicate) | | \- (org.springframework:spring-core:jar:2.5.6:compile - omitted for duplicate) | +- org.springframework:spring-core:jar:2.5.6:compile | | \- (commons-logging:commons-logging:jar:1.1.1:compile - omitted for duplicate) | +- org.springframework:spring-tx:jar:2.5.6:compile | | +- (commons-logging:commons-logging:jar:1.1.1:compile - omitted for duplicate) | | +- (org.springframework:spring-beans:jar:2.5.6:compile - omitted for duplicate) | | +- (org.springframework:spring-context:jar:2.5.6:compile - omitted for duplicate) | | \- (org.springframework:spring-core:jar:2.5.6:compile - omitted for duplicate) | \- stax:stax:jar:1.2.0:compile | \- stax:stax-api:jar:1.0.1:compile +- commons-dbcp:commons-dbcp:jar:1.2.2:compile | \- commons-pool:commons-pool:jar:1.3:compile +- org.hibernate:hibernate-core:jar:3.3.2.GA:compile | +- antlr:antlr:jar:2.7.7:compile (version managed from 2.7.6) | +- dom4j:dom4j:jar:1.6.1-jboss:compile (version managed from 1.6.1) | +- javax.transaction:jta:jar:1.0.1B:compile (version managed from 1.1) | \- (org.slf4j:slf4j-api:jar:1.5.6:compile - version managed from 1.4.2; omitted for duplicate) +- org.hibernate:hibernate-validator:jar:3.1.0.GA:compile | +- (org.hibernate:hibernate-core:jar:3.3.2.GA:compile - version managed from 3.3.0.SP1; omitted for duplicate) | +- org.hibernate:hibernate-commons-annotations:jar:3.1.0.GA:compile | | \- (org.slf4j:slf4j-api:jar:1.5.6:compile - version managed from 1.4.2; omitted for duplicate) | \- (org.slf4j:slf4j-api:jar:1.5.6:compile - version managed from 1.4.2; omitted for duplicate) +- org.hibernate:hibernate-annotations:jar:3.4.0.GA:compile | +- org.hibernate:ejb3-persistence:jar:1.0.2.GA:compile | +- (org.hibernate:hibernate-commons-annotations:jar:3.1.0.GA:compile - omitted for duplicate) | +- (org.hibernate:hibernate-core:jar:3.3.2.GA:compile - version managed from 3.3.0.SP1; omitted for duplicate) | +- (org.slf4j:slf4j-api:jar:1.5.6:compile - version managed from 1.4.2; omitted for duplicate) | \- (dom4j:dom4j:jar:1.6.1-jboss:compile - version managed from 1.6.1; omitted for duplicate) +- ojdbc:ojdbc:jar:14:compile +- org.slf4j:slf4j-api:jar:1.5.6:compile +- org.slf4j:slf4j-log4j12:jar:1.5.6:compile | \- (org.slf4j:slf4j-api:jar:1.5.6:compile - version managed from 1.4.2; omitted for duplicate) +- log4j:log4j:jar:1.2.15:compile +- org.apache.velocity:velocity:jar:1.6.2:compile | +- (commons-collections:commons-collections:jar:3.2.1:compile - omitted for duplicate) | +- (commons-lang:commons-lang:jar:2.4:compile - omitted for duplicate) | \- oro:oro:jar:2.0.8:compile +- org.testng:testng:jar:jdk15:5.8:test +- org.dbunit:dbunit:jar:2.4.5:test | +- junit:junit:jar:4.7:test (version managed from 3.8.2) | +- (org.slf4j:slf4j-api:jar:1.5.6:test - version managed from 1.4.2; omitted for duplicate) | \- (commons-collections:commons-collections:jar:3.2.1:test - omitted for duplicate) +- hsqldb:hsqldb:jar:1.8.0.7:test +- jboss:javassist:jar:3.3.ga:provided +- org.jdom:jdom:jar:1.1:compile +- jaxen:jaxen:jar:1.1.1:provided +- org.apache.xmlgraphics:fop:jar:0.95:compile | +- (org.apache.xmlgraphics:xmlgraphics-commons:jar:1.3.1:compile - omitted for duplicate) | +- org.apache.xmlgraphics:batik-svg-dom:jar:1.7:compile | | +- (org.apache.xmlgraphics:batik-svg-dom:jar:1.7:compile - omitted for cycle) | | +- org.apache.xmlgraphics:batik-anim:jar:1.7:compile | | | +- (org.apache.xmlgraphics:batik-awt-util:jar:1.7:compile - omitted for duplicate) | | | +- (org.apache.xmlgraphics:batik-dom:jar:1.7:compile - omitted for duplicate) | | | +- (org.apache.xmlgraphics:batik-ext:jar:1.7:compile - omitted for duplicate) | | | \- (org.apache.xmlgraphics:batik-parser:jar:1.7:compile - omitted for duplicate) | | +- (org.apache.xmlgraphics:batik-awt-util:jar:1.7:compile - omitted for duplicate) | | +- org.apache.xmlgraphics:batik-css:jar:1.7:compile | | | +- (org.apache.xmlgraphics:batik-ext:jar:1.7:compile - omitted for duplicate) | | | +- (org.apache.xmlgraphics:batik-util:jar:1.7:compile - omitted for duplicate) | | | \- (xml-apis:xml-apis-ext:jar:1.3.04:compile - omitted for duplicate) | | +- org.apache.xmlgraphics:batik-dom:jar:1.7:compile | | | +- (org.apache.xmlgraphics:batik-css:jar:1.7:compile - omitted for duplicate) | | | +- (org.apache.xmlgraphics:batik-ext:jar:1.7:compile - omitted for duplicate) | | | +- (org.apache.xmlgraphics:batik-util:jar:1.7:compile - omitted for duplicate) | | | +- (org.apache.xmlgraphics:batik-xml:jar:1.7:compile - omitted for duplicate) | | | +- (xalan:xalan:jar:2.6.0:compile - omitted for duplicate) | | | \- (xml-apis:xml-apis-ext:jar:1.3.04:compile - omitted for duplicate) | | +- (org.apache.xmlgraphics:batik-ext:jar:1.7:compile - omitted for duplicate) | | +- org.apache.xmlgraphics:batik-parser:jar:1.7:compile | | | +- (org.apache.xmlgraphics:batik-awt-util:jar:1.7:compile - omitted for duplicate) | | | +- (org.apache.xmlgraphics:batik-util:jar:1.7:compile - omitted for duplicate) | | | \- (org.apache.xmlgraphics:batik-xml:jar:1.7:compile - omitted for duplicate) | | +- org.apache.xmlgraphics:batik-util:jar:1.7:compile | | \- xml-apis:xml-apis-ext:jar:1.3.04:compile | +- org.apache.xmlgraphics:batik-bridge:jar:1.7:compile | | +- (org.apache.xmlgraphics:batik-anim:jar:1.7:compile - omitted for duplicate) | | +- (org.apache.xmlgraphics:batik-awt-util:jar:1.7:compile - omitted for duplicate) | | +- (org.apache.xmlgraphics:batik-css:jar:1.7:compile - omitted for duplicate) | | +- (org.apache.xmlgraphics:batik-dom:jar:1.7:compile - omitted for duplicate) | | +- (org.apache.xmlgraphics:batik-ext:jar:1.7:compile - omitted for duplicate) | | +- (org.apache.xmlgraphics:batik-bridge:jar:1.7:compile - omitted for cycle) | | +- (org.apache.xmlgraphics:batik-gvt:jar:1.7:compile - omitted for duplicate) | | +- (org.apache.xmlgraphics:batik-parser:jar:1.7:compile - omitted for duplicate) | | +- (org.apache.xmlgraphics:batik-bridge:jar:1.7:compile - omitted for cycle) | | +- org.apache.xmlgraphics:batik-script:jar:1.7:compile | | +- (org.apache.xmlgraphics:batik-svg-dom:jar:1.7:compile - omitted for duplicate) | | +- (org.apache.xmlgraphics:batik-util:jar:1.7:compile - omitted for duplicate) | | +- org.apache.xmlgraphics:batik-xml:jar:1.7:compile | | | \- (org.apache.xmlgraphics:batik-util:jar:1.7:compile - omitted for duplicate) | | +- xalan:xalan:jar:2.6.0:compile | | \- (xml-apis:xml-apis-ext:jar:1.3.04:compile - omitted for duplicate) | +- org.apache.xmlgraphics:batik-awt-util:jar:1.7:compile | | \- (org.apache.xmlgraphics:batik-util:jar:1.7:compile - omitted for duplicate) | +- org.apache.xmlgraphics:batik-gvt:jar:1.7:compile | | +- (org.apache.xmlgraphics:batik-awt-util:jar:1.7:compile - omitted for duplicate) | | +- (org.apache.xmlgraphics:batik-gvt:jar:1.7:compile - omitted for cycle) | | +- (org.apache.xmlgraphics:batik-bridge:jar:1.7:compile - omitted for duplicate) | | \- (org.apache.xmlgraphics:batik-util:jar:1.7:compile - omitted for duplicate) | +- org.apache.xmlgraphics:batik-transcoder:jar:1.7:compile | | +- (org.apache.xmlgraphics:batik-awt-util:jar:1.7:compile - omitted for duplicate) | | +- (org.apache.xmlgraphics:batik-bridge:jar:1.7:compile - omitted for duplicate) | | +- (org.apache.xmlgraphics:batik-dom:jar:1.7:compile - omitted for duplicate) | | +- (org.apache.xmlgraphics:batik-gvt:jar:1.7:compile - omitted for duplicate) | | +- (org.apache.xmlgraphics:batik-svg-dom:jar:1.7:compile - omitted for duplicate) | | +- org.apache.xmlgraphics:batik-svggen:jar:1.7:compile | | | +- (org.apache.xmlgraphics:batik-awt-util:jar:1.7:compile - omitted for duplicate) | | | \- (org.apache.xmlgraphics:batik-util:jar:1.7:compile - omitted for duplicate) | | +- (org.apache.xmlgraphics:batik-util:jar:1.7:compile - omitted for duplicate) | | +- (org.apache.xmlgraphics:batik-xml:jar:1.7:compile - omitted for duplicate) | | \- (xml-apis:xml-apis-ext:jar:1.3.04:compile - omitted for duplicate) | +- org.apache.xmlgraphics:batik-extension:jar:1.7:compile | | +- (org.apache.xmlgraphics:batik-awt-util:jar:1.7:compile - omitted for duplicate) | | +- (org.apache.xmlgraphics:batik-bridge:jar:1.7:compile - omitted for duplicate) | | +- (org.apache.xmlgraphics:batik-css:jar:1.7:compile - omitted for duplicate) | | +- (org.apache.xmlgraphics:batik-dom:jar:1.7:compile - omitted for duplicate) | | +- (org.apache.xmlgraphics:batik-ext:jar:1.7:compile - omitted for duplicate) | | +- (org.apache.xmlgraphics:batik-gvt:jar:1.7:compile - omitted for duplicate) | | +- (org.apache.xmlgraphics:batik-parser:jar:1.7:compile - omitted for duplicate) | | +- (org.apache.xmlgraphics:batik-svg-dom:jar:1.7:compile - omitted for duplicate) | | +- (org.apache.xmlgraphics:batik-util:jar:1.7:compile - omitted for duplicate) | | \- (xml-apis:xml-apis-ext:jar:1.3.04:compile - omitted for duplicate) | +- org.apache.xmlgraphics:batik-ext:jar:1.7:compile | +- commons-logging:commons-logging:jar:1.1.1:compile | +- commons-io:commons-io:jar:1.3.1:compile | \- org.apache.avalon.framework:avalon-framework-api:jar:4.3.1:compile +- org.apache.xmlgraphics:xmlgraphics-commons:jar:1.3.1:compile | +- (commons-io:commons-io:jar:1.3.1:compile - omitted for duplicate) | \- (commons-logging:commons-logging:jar:1.1.1:compile - version managed from 1.0.4; omitted for duplicate) +- org.easymock:easymock:jar:2.0:test \- org.easymock:easymockclassextension:jar:2.2:test +- (org.easymock:easymock:jar:2.2:test - omitted for conflict with 2.0) \- cglib:cglib-nodep:jar:2.2:test (version managed from 2.1_3) Can anyone tell me how to clear out intellij's classpath too?

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• Why can't I physically access my machine after a remote session?

  - by Steve Crane

  I have a Dell Optiplex 960 desktop running Windows 7 64-bit at work. I typically leave it locked rather than logged off when I go home, so that I'm able to remote in from home and continue working if I wish. This is where the problem comes in. If I don't remote in there is no problem and I can simply unlock the next morning. It's when I do remote in that I have a problem. Remote sessions work as expected but when I get to work the next morning the machine appears to have gone into a sleep or hibernate state, from which no amount of mouse moving or keyboard pounding will wake it. The machine is not hanging as remote sessions to it are still possible; it seems that physical access from it's own mouse and keyboard are lost. The only way to gain access is to press and hold the power switch for several seconds until the machine shuts down. Of course this means Windows does not gracefully shut down and after powering up it takes several minutes for the machine to boot and reach the login prompt; presumably while it checks the disk. Has anyone else seen something like this?

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• Windows 7 misses keystrokes from internal keyboard after hibernation (on Acer Aspire 5820)

  - by ron

  I face a very strange symptom on my Acer Aspire laptop (with the factory default Win7 install and divers. Windows update running). After waking the computer from hibernation, it is a pain to type, since on average 5-10 keypresses are missing per 100 presses, using the laptop's keyboard. Steps to reproduce: 1) Power off 2) Power on, wait for system to become usable 3) Open notepad, for 5 times do hit 10x the same character. This gives a similar pattern of 50 chars total: xxxxxxxxxxyyyyyyyyyyaaaaaaaaaassssssssssdddddddddd 4) Optionally repeat. Everything is fine this far. 5) Hibernate. 6) Power on and resume. 7) Repeat steps 3)-4). This time approximately 3-5 character will be missing from each 50 characters. What I ruled out: putting to Sleep or just Locking and resuming from there does not cause problem battery / AC usage does not matter net connection does not matter running processes seem to be the same before and after hibernation key press speed doesn't really matter. For the test I use a nominal 3-5 strokes/second beat. plugging in an external USB keyboard works fine, but the built-in one still misbehaves What could be the problem? How could I diagnose if the keypresses arrive in, but get swallowed at some point? (maybe some nasty keyboard handler hook misbehaves?). Update: It seems that pushing the PowerSmart button and toggling to power saving state fixes the problem. Also, toggling it again back to the original state keeps it fixed. So this may be a fine workaround, but is not a conforming solution.

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• Windows 7 misses keystrokes from internal keyboard after hibernation (on Acer Aspire 5820)

  - by ron

  I face a very strange symptom on my Acer Aspire laptop (with the factory default Win7 install and divers. Windows update running). After waking the computer from hibernation, it is a pain to type, since on average 5-10 keypresses are missing per 100 presses, using the laptop's keyboard. Steps to reproduce: 1) Power off 2) Power on, wait for system to become usable 3) Open notepad, for 5 times do hit 10x the same character. This gives a similar pattern of 50 chars total: xxxxxxxxxxyyyyyyyyyyaaaaaaaaaassssssssssdddddddddd 4) Optionally repeat. Everything is fine this far. 5) Hibernate. 6) Power on and resume. 7) Repeat steps 3)-4). This time approximately 3-5 character will be missing from each 50 characters. What I ruled out: putting to Sleep or just Locking and resuming from there does not cause problem battery / AC usage does not matter net connection does not matter running processes seem to be the same before and after hibernation key press speed doesn't really matter. For the test I use a nominal 3-5 strokes/second beat. plugging in an external USB keyboard works fine, but the built-in one still misbehaves What could be the problem? How could I diagnose if the keypresses arrive in, but get swallowed at some point? (maybe some nasty keyboard handler hook misbehaves?). Update: It seems that pushing the PowerSmart button and toggling to power saving state fixes the problem. Also, toggling it again back to the original state keeps it fixed. So this may be a fine workaround, but is not a conforming solution.

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• NoPrimaryKeyException from DBUnit when loading a dataset into a databse

  - by Omar Kooheji

  I'm getting NoPrimaryKeyException when I try to run one of my unit tests which uses DBUnit. The datatable is created using Hibernate and is a join table between two classes mapping a many to many relationship. The annotations that define the relationship are as follows: @Override @ManyToMany @JoinTable(name="offset_file_offset_entries", joinColumns={@JoinColumn(name="offset_entry_id")},inverseJoinColumns={@JoinColumn(name="file_description_id")}) public List<OffsetEntry> getOffsets() { The other entries in in the XML file I'm using to define the dataset seem to work fine but not the join table. I get the following exception: org.dbunit.dataset.NoPrimaryKeyException: offset_file_offset_entries at org.dbunit.operation.UpdateOperation.getOperationData(UpdateOperation.java:72) at org.dbunit.operation.RefreshOperation$UpdateRowOperation.<init>(RefreshOperation.java:266) at org.dbunit.operation.RefreshOperation.createUpdateOperation(RefreshOperation.java:142) at org.dbunit.operation.RefreshOperation.execute(RefreshOperation.java:100) at org.dbunit.ext.mssql.InsertIdentityOperation.execute(InsertIdentityOperation.java:217) at uk.co.sabio.obscheduler.application.dao.AbstractBaseDatabaseTest.setUp(AbstractBaseDatabaseTest.java:57) at org.springframework.test.context.junit38.AbstractJUnit38SpringContextTests.runManaged(AbstractJUnit38SpringContextTests.java:332) at org.springframework.test.context.junit38.AbstractJUnit38SpringContextTests.access$0(AbstractJUnit38SpringContextTests.java:326) at org.springframework.test.context.junit38.AbstractJUnit38SpringContextTests$1.run(AbstractJUnit38SpringContextTests.java:216) at org.springframework.test.context.junit38.AbstractJUnit38SpringContextTests.runTest(AbstractJUnit38SpringContextTests.java:296) at org.springframework.test.context.junit38.AbstractJUnit38SpringContextTests.runTestTimed(AbstractJUnit38SpringContextTests.java:253) at org.springframework.test.context.junit38.AbstractJUnit38SpringContextTests.runBare(AbstractJUnit38SpringContextTests.java:213) at junit.framework.TestResult$1.protect(TestResult.java:110) at junit.framework.TestResult.runProtected(TestResult.java:128) at junit.framework.TestResult.run(TestResult.java:113) at junit.framework.TestCase.run(TestCase.java:124) at junit.framework.TestSuite.runTest(TestSuite.java:232) at junit.framework.TestSuite.run(TestSuite.java:227) at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:83) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:46) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197) the Dataset entry in question looks like this: <offset_file_offset_entries offset_entry_id="1" file_description_id="1" /> And matches up with the database which has both fields as primary keys (The Databse is MS SQL Server if that helps) There are corresponding entries in the two tables being Joined defined in the following xml: <dataset> <file_description file_path="src/test/resources/" file_pattern=".txt" file_description_id="1"/> <offset_file_description file_description_id="1"/> <offset_entries offset_entry_id="1" field_name="Field1" field_length="10" start_index="0"/> <offset_file_offset_entries offset_entry_id="1" file_description_id="1" /> </dataset> Do I have to define the primary keys in the hibernate annotations? If so How do I do so? do I have to change the way I define my dataset to imply that the two columns are a joint primary key? I'm not very proficient with hibernate or DBUnit for that matter and I'm at my wits end so any assistance would be really appreciated.

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• Making ehcache read-write for test code and read-only for production code

  - by Rick

  I would like to annotate many of my Hibernate entities that contain reference data and/or configuration data with @Cache(usage = CacheConcurrencyStrategy.READ_ONLY) However, my JUnit tests are setting up and tearing down some of this reference/configuration data using the Hibernate entities. Is there a recommended way of having entities be read-write during test setup and teardown but read-only for production code? Two of my immediate thoughts for non-ideal workarounds are: Using NONSTRICT_READ_WRITE, but I am not sure what the hidden downsides are. Creating subclassed entities in my test code to override the read-only cache annotation. Any recommendations on the cleanest way to handle this? (Note: Project uses maven.)

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• ORA-22835 using JPA (Buffer too small)

  - by Kenneth

  I am trying to persist an Entity with a @Lob annotated String field. The content of that fiels if bigger than the 40k buffer size limit. The first problem I had was related to the setString method used internally by the JPA implementation (Hibernate in my case) and the Oracle JDBC Driver. This problem was solved adding <property name="hibernate.connection.SetBigStringTryClob" value="true"/> to my persistence.xml file. Then, the error changed to a ORA-22835 error (the buffer is too small). ¿Is there any way that JPA solves this problem without going to a low-level implementation? ¿Any suggestions?

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• JPA Cascade delete.

  - by Win Man

  Hi, I am new to JPA/Hibernate. Currently using EJB3, Hibernate/JPA. I have an inheritacnce structure as follows.. @Entity @DiscriminatorColumn(name = "form_type") @Inheritance(strategy = InheritanceType.JOINED) @GenericGenerator(name = "FORMS_SEQ", strategy = "sequence-identity", parameters = @Parameter(name = "sequence", value = "FORMS_SEQ")) @Table(name = "Forms") public abstract class Form{ //code for Form } @Entity @Table(name = "CREDIT_CARDS") @PrimaryKeyJoinColumn(name="CREDIT_CARD_ID") public class CreditCardForm extends Form { //Code for CreditCards. } When I add a row with save the rows are properly inserted into the parent and the child table. However when I try to delete I get an error - 10:19:35,465 ERROR [TxPolicy] javax.ejb.EJBTransactionRolledbackException: Removing a detached instance com.data.entities.form.financial.CreditCard#159? I am using a simple for loop to determine the inheritance type - CreditCard or DebitCard and then calling entityManager.remove(entity). What am I doing wrong? Code for delete.. for(Form content: contents){ if(content.getType()==Type.CREDIT_CARD){ creditCardService.delete((CreditCard)content); } Thanks. WM

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• How to I create an HQL query to return objects in a many to many relationship?

  - by Dave

  Hi there. I have an application that includes 2 classes Club and Article. These are mapped in Hibernate as a many to many relationship. As a result, hibernate has created a table called CLUB_ARTICLE which it uses to manage the many to many relation ship. The CLUB and ARTILCE tables have no direct reference to each other and the mapping is only represented in the CLUB_ARTICLE table. I need to create an HQL query that returns a list of articles for a particlular club. So I need to supply the club id and get back a list of Article objects that belong to it. For some reason, I just can't work out how to do this. Any help would be very much appriciated! Thanks.

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• JPA Cascading Delete: Setting child FK to NULL on a NOT NULL column

  - by JBristow

  I have two tables: t_promo_program and t_promo_program_param. They are represented by the following JPA entities: @Entity @Table(name = "t_promo_program") public class PromoProgram { @Id @Column(name = "promo_program_id") private Long id; @OneToMany(cascade = {CascadeType.REMOVE}) @JoinColumn(name = "promo_program_id") private List<PromoProgramParam> params; } @Entity @Table(name = "t_promo_program_param") public class PromoProgramParam { @Id @Column(name = "promo_program_param_id") private Long id; //@NotNull // This is a Hibernate annotation so that my test db gets created with the NOT NULL attribute, I'm not married to this annotation. @ManyToOne @JoinColumn(name = "PROMO_PROGRAM_ID", referencedColumnName = "promo_program_id") private PromoProgram promoProgram; } When I delete a PromoProgram, Hibernate hits my database with: update T_PROMO_PROGRAM_PARAM set promo_program_id=null where promo_program_id=? delete from t_promo_program where promo_program_id=? and last_change=? I'm at a loss for where to start looking for the source of the problem.

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• Passing empty list as parameter to JPA query throws error

  - by Tuukka Mustonen

  If I pass an empty list into a JPA query, I get an error. For example: List<Municipality> municipalities = myDao.findAll(); // returns empty list em.createQuery("SELECT p FROM Profile p JOIN p.municipality m WHERE m IN (:municipalities)") .setParameter("municipalities", municipalities) .getResultList(); Because the list is empty, Hibernate generates this in SQL as "IN ()", which gives me error with Hypersonic database. There is a ticket for this in Hibernate issue tracking but there are not many comments/activity there. I don't know about support in other ORM products or in JPA spec either. I don't like the idea of having to manually check for null objects and empty lists every time. Is there some commonly known approach/extension to this? How do you handle these situations?

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• Understanding SingleTableEntityPersister n QueryLoader

  - by Iapilgrim

  Hi, I have the Hibernate model @Cache(usage = CacheConcurrencyStrategy.NONE, region = SitesConstants.CACHE_REGION) public class Node extends StatefulEntity implements Inheritable, Cloneable { private Node _parent; private List<Node> _childNodes; .. } @Cache(usage = CacheConcurrencyStrategy.NONE, region = SitesConstants.CACHE_REGION) public class Page extends Node implements Defaultable, Securable { private RootZone _rootZone; ...... @OneToOne(fetch = FetchType.LAZY) @JoinColumn(name = "root_zone_id", insertable = false, updatable = false) public RootZone getRootZone() { return _rootZone; } public void setRootZone(RootZone rootZone) { if (rootZone != null) { rootZone.setPageId(this.getId()); _rootZone = rootZone; } } I want to get all pages ( call getSiteTree), so I using this query String hpql = "SELECT n FROM Node n "; See the trace I find Page.setRootZone(RootZone) line: 155 NativeMethodAccessorImpl.invoke0(Method, Object, Object[]) line: not available [native method] NativeMethodAccessorImpl.invoke(Object, Object[]) line: 39 DelegatingMethodAccessorImpl.invoke(Object, Object[]) line: 25 Method.invoke(Object, Object...) line: 597 BasicPropertyAccessor$BasicSetter.set(Object, Object, SessionFactoryImplementor) line: 66 PojoEntityTuplizer(AbstractEntityTuplizer).setPropertyValues(Object, Object[]) line: 352 PojoEntityTuplizer.setPropertyValues(Object, Object[]) line: 232 SingleTableEntityPersister(AbstractEntityPersister).setPropertyValues(Object, Object[], EntityMode) line: 3580 TwoPhaseLoad.initializeEntity(Object, boolean, SessionImplementor, PreLoadEvent, PostLoadEvent) line: 152 QueryLoader(Loader).initializeEntitiesAndCollections(List, Object, SessionImplementor, boolean) line: 877 QueryLoader(Loader).doQuery(SessionImplementor, QueryParameters, boolean) line: 752 QueryLoader(Loader).doQueryAndInitializeNonLazyCollections(SessionImplementor, QueryParameters, boolean) line: 259 QueryLoader(Loader).doList(SessionImplementor, QueryParameters) line: 2232 QueryLoader(Loader).listIgnoreQueryCache(SessionImplementor, QueryParameters) line: 2129 QueryLoader(Loader).list(SessionImplementor, QueryParameters, Set, Type[]) line: 2124 QueryLoader.list(SessionImplementor, QueryParameters) line: 401 QueryTranslatorImpl.list(SessionImplementor, QueryParameters) line: 363 HQLQueryPlan.performList(QueryParameters, SessionImplementor) line: 196 SessionImpl.list(String, QueryParameters) line: 1149 QueryImpl.list() line: 102 QueryImpl.getResultList() line: 67 NodeDaoImpl.getSiteTree(long) line: 358 PageNodeServiceImpl.getSiteTree(long) line: 797 NativeMethodAccessorImpl.invoke0(Method, Object, Object[]) line: not available [native method] NativeMethodAccessorImpl.invoke(Object, Object[]) line: 39 DelegatingMethodAccessorImpl.invoke(Object, Object[]) line: 25 Method.invoke(Object, Object...) line: 597 AopUtils.invokeJoinpointUsingReflection(Object, Method, Object[]) line: 307 JdkDynamicAopProxy.invoke(Object, Method, Object[]) line: 198 $Proxy100.getSiteTree(long) line: not available the calling setRootZone in Page makes Hibernate issue a hit to database. I don't want this. So my question is + Why query String hpql = "SELECT n FROM Node n "; issues un-expected trace logs like above. Why the query String hpql = "SELECT n.nodename FROM Node n " not? What is the mechanism behind? Note: Im using hibernate caching level 2. In case I don't want to see that trace logs. I mean I just get Node data only. How to do ? Thanks for your help. Sorry for my bad english :( Van

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