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java.lang.Objectorg.eclipse.emf.cdo.transaction.CDODefaultTransactionHandler1
public abstract class CDODefaultTransactionHandler1
An empty default implementation of CDOTransactionHandler1
.
Constructor Summary | |
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protected |
CDODefaultTransactionHandler1()
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Method Summary | |
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void |
attachingObject(CDOTransaction transaction,
CDOObject object)
Called by a CDOTransaction before an object is added. |
void |
detachingObject(CDOTransaction transaction,
CDOObject object)
Called by a CDOTransaction before an object is detached. |
void |
modifyingObject(CDOTransaction transaction,
CDOObject object,
CDOFeatureDelta featureChange)
Called by a CDOTransaction before an object is modified. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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protected CDODefaultTransactionHandler1()
Method Detail |
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public void attachingObject(CDOTransaction transaction, CDOObject object)
CDOTransactionHandler1
CDOTransaction
before an object is added. The implementor of this method is allowed
to throw an unchecked exception that will propagate up to the operation that is about to add the object (thereby
preventing the operation from successful completion).
Note: Implementors must not start threads which access the view
and wait for their
completion since deadlocks can result. The following example causes a deadlock:
getDisplay().syncExec(new Runnable() { public void run() { try { cdoObject.getName(); } catch (Exception ignore) { } } });If you need to synchronously execute threads which access the
view
you should use
CDOAsyncTransactionHandler
.
attachingObject
in interface CDOTransactionHandler1
public void detachingObject(CDOTransaction transaction, CDOObject object)
CDOTransactionHandler1
CDOTransaction
before an object is detached. The implementor of this method is
allowed to throw an unchecked exception that will propagate up to the operation that is about to remove the object
(thereby preventing the operation from completing successfully).
Note: Implementors must not start threads which access the view
and wait for their
completion since deadlocks can result. The following example causes a deadlock:
getDisplay().syncExec(new Runnable() { public void run() { try { cdoObject.getName(); } catch (Exception ignore) { } } });If you need to synchronously execute threads which access the
view
you should use
CDOAsyncTransactionHandler
.
detachingObject
in interface CDOTransactionHandler1
public void modifyingObject(CDOTransaction transaction, CDOObject object, CDOFeatureDelta featureChange)
CDOTransactionHandler1
CDOTransaction
before an object is modified. The implementor of this method is
allowed to throw an unchecked exception that will propagate up to the operation that is about to modify the object
(thereby preventing the operation from completing successfully).
Note: Implementors must not start threads which access the view
and wait for their
completion since deadlocks can result. The following example causes a deadlock:
getDisplay().syncExec(new Runnable() { public void run() { try { cdoObject.getName(); } catch (Exception ignore) { } } });If you need to synchronously execute threads which access the
view
you should use
CDOAsyncTransactionHandler
.
modifyingObject
in interface CDOTransactionHandler1
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