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1. Re: Change of package structure for Blob implementation?
erikture Feb 27, 2003 9:41 AM (in response to erikture)Hello!
I am still having problem with my blobs.
Now I would like to try JBoss using JDK1.4.
Since the java.sql.Blob interface have changed between 1.3 and 1.4 I have to change and recompile my blob implementation.
If I start from a clean database everything is ok, but if I am using an existing database, created with jdk 1.3.1 then I am getting the following error:
2003-02-27 15:47:13,215 ERROR [org.jboss.ejb.plugins.LogInterceptor] TransactionRolledbackLocalException, causedBy:
java.sql.SQLException: Unable to load to deserialize result: java.io.InvalidClassException: com.proventek.scj.util.ByteArrayBlob; local class incompatible: stream classdesc serialVersionUID = 832987368681186065, local class serialVersionUID = 1501205439159683714
at org.jboss.ejb.plugins.cmp.jdbc.JDBCUtil.convertToObject(JDBCUtil.java:753)
at org.jboss.ejb.plugins.cmp.jdbc.JDBCUtil.getResult(JDBCUtil.java:360)
at org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCAbstractCMPFieldBridge.loadArgumentResults(JDBCAbstractCMPFieldBridge.java:359)
at org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCAbstractCMPFieldBridge.loadInstanceResults(JDBCAbstractCMPFieldBridge.java:312)
at org.jboss.ejb.plugins.cmp.jdbc.JDBCLoadEntityCommand.execute(JDBCLoadEntityCommand.java:147)
at org.jboss.ejb.plugins.cmp.jdbc.JDBCLoadEntityCommand.execute(JDBCLoadEntityCommand.java:62)
at org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager.loadEntity(JDBCStoreManager.java:572)
at org.jboss.ejb.plugins.CMPPersistenceManager.loadEntity(CMPPersistenceManager.java:410)
at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.loadEntity(CachedConnectionInterceptor.java:353)
at org.jboss.ejb.plugins.EntitySynchronizationInterceptor.invoke(EntitySynchronizationInterceptor.java:252)
at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:186)
at org.jboss.ejb.plugins.EntityReentranceInterceptor.invoke(EntityReentranceInterceptor.java:90)
at org.jboss.ejb.plugins.EntityInstanceInterceptor.invoke(EntityInstanceInterceptor.java:168)
at org.jboss.ejb.plugins.EntityLockInterceptor.invoke(EntityLockInterceptor.java:107)
at org.jboss.ejb.plugins.EntityCreationInterceptor.invoke(EntityCreationInterceptor.java:69)
at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:107)
at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:228)
at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:92)
at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:130)
at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:204)
at org.jboss.ejb.EntityContainer.invoke(EntityContainer.java:493)
at org.jboss.ejb.plugins.local.BaseLocalContainerInvoker.invoke(BaseLocalContainerInvoker.java:301)
at org.jboss.ejb.plugins.local.EntityProxy.invoke(EntityProxy.java:38)
at $Proxy147.getId(Unknown Source)
What to do?
/Erik -
2. Re: Change of package structure for Blob implementation?
erikture Feb 27, 2003 9:48 AM (in response to erikture)Hello again!
The problem does actually occure even if I compile it with JDK 1.3.1 and just add some metthods to the implementation.
Should it be like that?
If so, how shall I implement a blob attribute.
/Erik -
3. Re: Change of package structure for Blob implementation?
erikture Feb 27, 2003 1:44 PM (in response to erikture)Hello!
Now I have understood what I have done.
I have note actually stored a blob, I have been storing an object with a byte[] inside. If I then changes the interface of my object then it can not be fetched from the database.
I have now changed my implementation to not implement the java.sql.Blob interface. My implementation is now very minimalistic to avoid changes in the future.
/Erik