Home » Modeling » EMF » [CDO] How to import/apply CDOChangeSetData
| [CDO] How to import/apply CDOChangeSetData [message #1603962] |
Fri, 06 February 2015 14:40  |
 Johannes Schaefer
Messages: 7
Registered: October 2014 |
Junior Member |
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Hi,
I trying to persist the changed data after changing a model and apply these data to an other model in CDO.
Here is the code to persist the changes
CDOSession session = getSession();
CDOTransaction tx = session.openTransaction();
CDOResource res = tx.getOrCreateResource( "JsCdoTest1" );
// changing the model
removeElements( res.getContents(), 5 );
changeElements( res.getContents(), 5 );
addElements( res.getContents(), 5 );
// getting the changed data
CDOChangeSetData changeSetData = tx.getChangeSetData();
// persisting the data
OutputStream outstream = new FileOutputStream( new File( "test.txt" ) );
ExtendedDataOutput edoutstream = new ExtendedDataOutputStream( outstream );
CDODataOutput out = CDOCommonUtil.createCDODataOutput( edoutstream, session.getPackageRegistry(), (CDOIDProvider)tx );
out.writeCDOChangeSetData( changeSetData );
System.out.println( changeSetData );
Now I'm trying to apply these to an existing model in CDO, but I don't find the correct API.
CDOSession session = getSession();
CDOTransaction tx = session.openTransaction();
CDOResource res = tx.getOrCreateResource( "JsCdoTest1" );
// read the change set
FileInputStream instream = new FileInputStream( new File( "test.txt" ) );
ExtendedDataInputStream edinstream = new ExtendedDataInputStream( instream );
CDODataInput dataInput = CDOCommonUtil.createCDODataInput( edinstream, session.getPackageRegistry(), session.getBranchManager(),
session.getCommitInfoManager(), CDORevisionFactory.DEFAULT, CDOListFactory.DEFAULT, ((InternalCDOSession)session).getLobStore() );
CDOChangeSetData changeSetData = dataInput.readCDOChangeSetData();
System.out.println( changeSetData );
So how can I apply changeSetData to my transaction?
Thanks for your answers.
Johannes.
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| Re: [CDO] How to import/apply CDOChangeSetData [message #1604012 is a reply to message #1603962] |
Fri, 06 February 2015 15:16  |
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Hi Johannes,
The following API methods have are provided to export changes and apply them later to the same model (IIRC, the CDOIDs
must match):
org.eclipse.emf.cdo.transaction.CDOTransaction.exportChanges(OutputStream)
org.eclipse.emf.cdo.transaction.CDOTransaction.importChanges(InputStream, boolean)
Is that what you're looking for? Maybe you're also interested in org.eclipse.emf.cdo.transaction.CDOPushTransaction,
which makes use of the aforementioned methods.
Cheers
/Eike
----
http://www.esc-net.de
http://thegordian.blogspot.com
http://twitter.com/eikestepper
Am 06.02.2015 um 15:40 schrieb Johannes Schaefer:
> Hi,
>
> I trying to persist the changed data after changing a model and apply these data to an other model in CDO.
>
> Here is the code to persist the changes
> CDOSession session = getSession();
> CDOTransaction tx = session.openTransaction();
> CDOResource res = tx.getOrCreateResource( "JsCdoTest1" );
> // changing the model
> removeElements( res.getContents(), 5 );
> changeElements( res.getContents(), 5 );
> addElements( res.getContents(), 5 );
> // getting the changed data
> CDOChangeSetData changeSetData = tx.getChangeSetData();
> // persisting the data
> OutputStream outstream = new FileOutputStream( new File( "test.txt" ) );
> ExtendedDataOutput edoutstream = new ExtendedDataOutputStream( outstream );
> CDODataOutput out = CDOCommonUtil.createCDODataOutput( edoutstream, session.getPackageRegistry(),
> (CDOIDProvider)tx );
> out.writeCDOChangeSetData( changeSetData );
> System.out.println( changeSetData );
>
> Now I'm trying to apply these to an existing model in CDO, but I don't find the correct API.
> CDOSession session = getSession();
> CDOTransaction tx = session.openTransaction();
> CDOResource res = tx.getOrCreateResource( "JsCdoTest1" );
> // read the change set
> FileInputStream instream = new FileInputStream( new File( "test.txt" ) );
> ExtendedDataInputStream edinstream = new ExtendedDataInputStream( instream );
> CDODataInput dataInput = CDOCommonUtil.createCDODataInput( edinstream, session.getPackageRegistry(),
> session.getBranchManager(), session.getCommitInfoManager(), CDORevisionFactory.DEFAULT, CDOListFactory.DEFAULT,
> ((InternalCDOSession)session).getLobStore() );
> CDOChangeSetData changeSetData = dataInput.readCDOChangeSetData();
> System.out.println( changeSetData );
>
> So how can I apply changeSetData to my transaction?
>
> Thanks for your answers.
> Johannes.
Cheers
/Eike
----
http://www.esc-net.de
http://thegordian.blogspot.com
http://twitter.com/eikestepper
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| Re: [CDO] How to import/apply CDOChangeSetData [message #1604116 is a reply to message #1604012] |
Fri, 06 February 2015 16:47 |
Johannes Schaefer
Messages: 7
Registered: October 2014 |
Junior Member |
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Hi Eike,
exportChanges and importChanges looks interesting. But actually doesn't work for me  .
Here are my tests:
@Test
public final void testApplyDiffFile2() throws IOException, ConcurrentAccessException, CommitException
{
CDOSession session = getSession();
CDOTransaction tx = session.openTransaction();
System.out.println( "has conflicts: " + tx.hasConflict() );
// read the change set
FileInputStream instream = new FileInputStream( new File( "test.txt" ) );
tx.importChanges( instream, true );
instream.close();
System.out.println( "has conflicts: " + tx.hasConflict() );
for( CDOObject conf : tx.getConflicts() )
{
System.out.println( conf );
}
// commit the changes
tx.commit();
session.close();
}
@Test
public final void testCreateDiffFile2() throws ConcurrentAccessException, CommitException, IOException
{
CDOSession session = getSession();
CDOTransaction tx = session.openTransaction();
CDOResource res = tx.getResource( "JsCdoTest1" );
// changing the model
removeElements( res.getContents(), 5 );
// changeElements( res.getContents(), 1 );
// addElements( res.getContents(), 1 );
// persisting the data
OutputStream outstream = new FileOutputStream( new File( "test.txt" ) );
tx.exportChanges( outstream );
outstream.close();
// commit the changes
tx.commit();
session.close();
}
When I try to add or remove elements, I get the following exception when I try to import the changes:
org.eclipse.emf.cdo.util.LocalCommitConflictException: This transaction has conflicts
at org.eclipse.emf.internal.cdo.transaction.CDOTransactionImpl.commitSynced(CDOTransactionImpl.java:1205)
at org.eclipse.emf.internal.cdo.transaction.CDOTransactionImpl.commit(CDOTransactionImpl.java:1184)
at org.eclipse.emf.internal.cdo.transaction.CDOTransactionImpl.commit(CDOTransactionImpl.java:1176)
at de.psi.metals.cdotest1.CdoTest1.testApplyDiffFile2(CdoTest1.java:116)
When I try to change a existing model element I get the following:
org.eclipse.emf.cdo.util.ObjectNotFoundException: Object _exlqwK4fEeSJ2tysTMRtgg not found in branch 0 at *
at org.eclipse.emf.internal.cdo.view.AbstractCDOView.createObject(AbstractCDOView.java:1097)
at org.eclipse.emf.internal.cdo.view.AbstractCDOView.getObject(AbstractCDOView.java:993)
at org.eclipse.emf.internal.cdo.transaction.CDOTransactionImpl.getObject(CDOTransactionImpl.java:1152)
at org.eclipse.emf.internal.cdo.view.AbstractCDOView.getObject(AbstractCDOView.java:940)
at org.eclipse.emf.internal.cdo.transaction.CDOTransactionImpl.importChanges(CDOTransactionImpl.java:2170)
at de.psi.metals.cdotest1.CdoTest1.testApplyDiffFile2(CdoTest1.java:106)
The status of the transaction after the import is conflicted, but there are no conflicts in the list.
Before each test I clear the resource (res.getContents().clear()) and add the same class structure.
Any ideas?
Regards,
Johannes.
[Updated on: Fri, 06 February 2015 16:48] Report message to a moderator |
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