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How to upgrade from ObjectDB 1.0?

Upgrade - Step By Step To upgrade an existing application that uses ObjectDB 1.0 to ObjectDB 2.0: Replace the old ObjectDB and JDO jar files with the new objectdb.jar file. Make sure that the old jar files are removed from the classpath (check both the build classpath and the execution classpath
Result
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What is new in ObjectDB 2.0?

query execution. Support of composite indexes and using indexes in query result sort. Improved query
Manual
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Database Connection using JPA

for Query instances, which are needed for executing queries on the database. Every JPA implementation
Manual
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Database Transaction Replayer

the recording directory as .odb, which specifies by its name the last executed
Tutorial
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Step 6: Run the Web Application

You can run the application now by right clicking the GuestServlet node (in the [Projects] window), selecting Run File, and then clicking OK (no need to change the servlet execution URI). Since we are using ObjectDB in embedded mode - the database file is created under the Tomcat directory
Manual
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Storing JPA Entity Objects

to the database is sometimes also useful before executing queries in order to get up to date results
Tutorial
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Step 6: Run the Java EE 6 Application

You can run the application now by right clicking the GuestServlet node (in the [Projects] window), selecting Run File, and then clicking OK (no need to change the servlet execution URI). Since we are using ObjectDB in embedded mode - the database file is created under the GlassFish directory (e.g
Issue
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objectdb-2.6.9_06: Extended Persistence Context fails: 'Attempt to begin a new transaction when a transaction is active'

app runs and will display this web page:   But then, when the commit() is executed on the second ... .deploy(ApplicationLifecycle.java:219) at org.glassfish.deployment.admin.DeployCommand.execute ... .java:360) at com.sun.enterprise.v3.admin.CommandRunnerImpl$2.execute(CommandRunnerImpl.java:534
JDO Doc
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javax.jdo.listener.AttachCallback

events. Since: JDO 2.0 void jdoPostAttach(Object attached) This method is called during the execution ... is made. This method is called during the execution of javax.jdo.PersistenceManager.makePersistent ... void jdoPreAttach() This method is called during the execution of javax.jdo.PersistenceManager
JDO Doc
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javax.jdo.listener.DetachCallback

events. Since: JDO 2.0 void jdoPostDetach(Object detached) This method is called during the execution ... is made. This method is called during the execution of javax.jdo.PersistenceManager.detachCopy on the detached ... . Since: JDO 2.0 void jdoPreDetach() This method is called during the execution of javax.jdo