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author | Eike Stepper | 2008-12-14 14:45:37 +0000 |
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committer | Eike Stepper | 2008-12-14 14:45:37 +0000 |
commit | 8434f42cdb069d53304355d759a90e965ef2cddd (patch) | |
tree | 04f9f1f9c696debd75d695d5035c9dba5d65413d /plugins/org.eclipse.emf.cdo/src/org/eclipse/emf/spi | |
parent | 3cd5fd57cd26b4398fe5fcaec7783e2afa8e8986 (diff) | |
download | cdo-8434f42cdb069d53304355d759a90e965ef2cddd.tar.gz cdo-8434f42cdb069d53304355d759a90e965ef2cddd.tar.xz cdo-8434f42cdb069d53304355d759a90e965ef2cddd.zip |
[257372] Handle conflict object without rollback the view completely
https://bugs.eclipse.org/bugs/show_bug.cgi?id=257372
Diffstat (limited to 'plugins/org.eclipse.emf.cdo/src/org/eclipse/emf/spi')
-rw-r--r-- | plugins/org.eclipse.emf.cdo/src/org/eclipse/emf/spi/cdo/ObjectConflictResolver.java | 280 |
1 files changed, 275 insertions, 5 deletions
diff --git a/plugins/org.eclipse.emf.cdo/src/org/eclipse/emf/spi/cdo/ObjectConflictResolver.java b/plugins/org.eclipse.emf.cdo/src/org/eclipse/emf/spi/cdo/ObjectConflictResolver.java index ab32787473..ec5f68994d 100644 --- a/plugins/org.eclipse.emf.cdo/src/org/eclipse/emf/spi/cdo/ObjectConflictResolver.java +++ b/plugins/org.eclipse.emf.cdo/src/org/eclipse/emf/spi/cdo/ObjectConflictResolver.java @@ -10,19 +10,39 @@ **************************************************************************/ package org.eclipse.emf.spi.cdo; +import org.eclipse.emf.cdo.CDOAdapterPolicy; +import org.eclipse.emf.cdo.CDOCommitContext; import org.eclipse.emf.cdo.CDOConflictResolver; +import org.eclipse.emf.cdo.CDODeltaNotification; import org.eclipse.emf.cdo.CDOObject; +import org.eclipse.emf.cdo.CDOState; import org.eclipse.emf.cdo.CDOTransaction; +import org.eclipse.emf.cdo.CDOTransactionHandler; import org.eclipse.emf.cdo.common.id.CDOID; +import org.eclipse.emf.cdo.common.model.CDOFeature; +import org.eclipse.emf.cdo.common.revision.delta.CDOFeatureDelta; import org.eclipse.emf.cdo.common.revision.delta.CDORevisionDelta; import org.eclipse.emf.cdo.internal.common.revision.delta.CDORevisionMerger; import org.eclipse.emf.cdo.spi.common.InternalCDORevision; import org.eclipse.emf.cdo.spi.common.InternalCDORevisionDelta; +import org.eclipse.emf.cdo.util.CDODefaultTransactionHandler; import org.eclipse.emf.internal.cdo.CDOObjectMerger; import org.eclipse.emf.internal.cdo.CDOStateMachine; import org.eclipse.emf.internal.cdo.InternalCDOObject; +import org.eclipse.emf.internal.cdo.bundle.OM; +import org.eclipse.emf.internal.cdo.util.FSMUtil; +import org.eclipse.emf.common.notify.Adapter; +import org.eclipse.emf.common.notify.Notification; +import org.eclipse.emf.common.notify.impl.AdapterImpl; +import org.eclipse.emf.ecore.EObject; + +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashMap; +import java.util.HashSet; +import java.util.List; import java.util.Map; import java.util.Set; @@ -34,36 +54,74 @@ public abstract class ObjectConflictResolver implements CDOConflictResolver { public static final CDORevisionMerger REVISION_MERGER = new CDORevisionMerger(); + private CDOTransaction transaction; + public ObjectConflictResolver() { } - public void resolveConflicts(CDOTransaction transaction, Set<CDOObject> conflicts) + public CDOTransaction getTransaction() + { + return transaction; + } + + public void setTransaction(CDOTransaction transaction) + { + if (this.transaction != transaction) + { + if (this.transaction != null) + { + unhookTransaction(this.transaction); + } + + this.transaction = transaction; + + if (this.transaction != null) + { + hookTransaction(this.transaction); + } + } + } + + public void resolveConflicts(Set<CDOObject> conflicts) { Map<CDOID, CDORevisionDelta> revisionDeltas = transaction.getRevisionDeltas(); for (CDOObject conflict : conflicts) { CDORevisionDelta revisionDelta = revisionDeltas.get(conflict.cdoID()); - resolveConflict(transaction, conflict, revisionDelta); + resolveConflict(conflict, revisionDelta); } } /** * Resolves the conflict of a single object in the current transaction. */ - protected abstract void resolveConflict(CDOTransaction transaction, CDOObject conflict, CDORevisionDelta revisionDelta); + protected abstract void resolveConflict(CDOObject conflict, CDORevisionDelta revisionDelta); + + protected void hookTransaction(CDOTransaction transaction) + { + } + + protected void unhookTransaction(CDOTransaction transaction) + { + } public static void rollbackObject(CDOObject object) { CDOStateMachine.INSTANCE.rollback((InternalCDOObject)object); } + public static void readObject(CDOObject object) + { + CDOStateMachine.INSTANCE.read((InternalCDOObject)object); + } + /** * TODO See {@link CDOObjectMerger}!!! */ public static void changeObject(CDOObject object, CDORevisionDelta revisionDelta) { - CDOStateMachine.INSTANCE.read((InternalCDOObject)object); + readObject(object); InternalCDORevision revision = (InternalCDORevision)object.cdoRevision().copy(); int originVersion = revision.getVersion(); @@ -90,10 +148,222 @@ public abstract class ObjectConflictResolver implements CDOConflictResolver } @Override - protected void resolveConflict(CDOTransaction transaction, CDOObject conflict, CDORevisionDelta revisionDelta) + protected void resolveConflict(CDOObject conflict, CDORevisionDelta revisionDelta) { rollbackObject(conflict); changeObject(conflict, revisionDelta); } } + + /** + * @author Eike Stepper + * @since 2.0 + */ + public static abstract class ThreeWayMerge extends ObjectConflictResolver implements CDOAdapterPolicy + { + private ChangeSubscriptionAdapter adapter = new ChangeSubscriptionAdapter(); + + private CDOTransactionHandler handler = new CDODefaultTransactionHandler() + { + @Override + public void modifyingObject(CDOTransaction transaction, CDOObject object, CDOFeatureDelta ignored) + { + if (getTransaction() == transaction) + { + if (object.cdoState() == CDOState.DIRTY || FSMUtil.isConflict(object)) + { + adapter.attach(object); + } + } + } + + @Override + public void committedTransaction(CDOTransaction transaction, CDOCommitContext commitContext) + { + if (getTransaction() == transaction) + { + adapter.reset(); + } + } + + @Override + public void rolledBackTransaction(CDOTransaction transaction) + { + if (getTransaction() == transaction) + { + adapter.reset(); + } + } + }; + + public ThreeWayMerge() + { + } + + public boolean isValid(EObject object, Adapter adapter) + { + return adapter instanceof ChangeSubscriptionAdapter; + } + + @Override + protected void hookTransaction(CDOTransaction transaction) + { + transaction.options().addChangeSubscriptionPolicy(this); + transaction.addHandler(handler); + } + + @Override + protected void unhookTransaction(CDOTransaction transaction) + { + transaction.removeHandler(handler); + transaction.options().removeChangeSubscriptionPolicy(this); + } + + @Override + protected void resolveConflict(CDOObject conflict, CDORevisionDelta revisionDelta) + { + resolveConflict(conflict, revisionDelta, adapter.getRevisionDeltas(conflict)); + } + + protected abstract void resolveConflict(CDOObject conflict, CDORevisionDelta localDelta, + List<CDORevisionDelta> remoteDeltas); + + /** + * @author Eike Stepper + * @since 2.0 + */ + public static class ChangeSubscriptionAdapter extends AdapterImpl + { + private Set<CDOObject> notifiers = new HashSet<CDOObject>(); + + private Map<CDOObject, List<CDORevisionDelta>> deltas = new HashMap<CDOObject, List<CDORevisionDelta>>(); + + public ChangeSubscriptionAdapter() + { + } + + public List<CDORevisionDelta> getRevisionDeltas(CDOObject notifier) + { + List<CDORevisionDelta> list = deltas.get(notifier); + if (list == null) + { + return Collections.emptyList(); + } + + return list; + } + + public Set<CDOObject> getNotifiers() + { + return notifiers; + } + + public Map<CDOObject, List<CDORevisionDelta>> getDeltas() + { + return deltas; + } + + public void attach(CDOObject notifier) + { + if (notifiers.add(notifier)) + { + notifier.eAdapters().add(this); + } + } + + public void reset() + { + for (CDOObject notifier : notifiers) + { + notifier.eAdapters().remove(this); + } + + notifiers.clear(); + deltas.clear(); + } + + @Override + public void notifyChanged(Notification msg) + { + try + { + CDODeltaNotification deltaNotification = (CDODeltaNotification)msg; + Object notifier = deltaNotification.getNotifier(); + if (notifiers.contains(notifier)) + { + CDORevisionDelta revisionDelta = deltaNotification.getRevisionDelta(); + List<CDORevisionDelta> list = deltas.get(notifier); + if (list == null) + { + list = new ArrayList<CDORevisionDelta>(1); + deltas.put((CDOObject)notifier, list); + } + + list.add(revisionDelta); + } + } + catch (Exception ex) + { + OM.LOG.error(ex); + } + } + } + } + + /** + * @author Eike Stepper + * @since 2.0 + */ + public static class MergeLocalChangesPerFeature extends ThreeWayMerge + { + public MergeLocalChangesPerFeature() + { + } + + @Override + protected void resolveConflict(CDOObject conflict, CDORevisionDelta localDelta, List<CDORevisionDelta> remoteDeltas) + { + if (hasFeatureConflicts(localDelta, remoteDeltas)) + { + // Leave object in CONFLICT state + return; + } + + rollbackObject(conflict); + + // Add remote deltas to local delta + for (CDORevisionDelta remoteDelta : remoteDeltas) + { + for (CDOFeatureDelta remoteFeatureDelta : remoteDelta.getFeatureDeltas()) + { + ((InternalCDORevisionDelta)localDelta).addFeatureDelta(remoteFeatureDelta); + } + } + + changeObject(conflict, localDelta); + } + + protected boolean hasFeatureConflicts(CDORevisionDelta localDelta, List<CDORevisionDelta> remoteDeltas) + { + Set<CDOFeature> features = new HashSet<CDOFeature>(); + for (CDOFeatureDelta localFeatureDelta : localDelta.getFeatureDeltas()) + { + features.add(localFeatureDelta.getFeature()); + } + + for (CDORevisionDelta remoteDelta : remoteDeltas) + { + for (CDOFeatureDelta remoteFeatureDelta : remoteDelta.getFeatureDeltas()) + { + CDOFeature feature = remoteFeatureDelta.getFeature(); + if (features.contains(feature)) + { + return true; + } + } + } + + return false; + } + } } |