/*
Derby - Class org.apache.derby.impl.store.raw.data.DropOnCommit
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to you under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package org.apache.derby.impl.store.raw.data;
import org.apache.derby.iapi.store.raw.ContainerHandle;
import org.apache.derby.iapi.store.raw.ContainerLock;
import org.apache.derby.iapi.store.raw.Page;
import org.apache.derby.iapi.store.raw.LockingPolicy;
import org.apache.derby.iapi.store.raw.RecordHandle;
import org.apache.derby.iapi.store.raw.data.RawContainerHandle;
import org.apache.derby.iapi.store.raw.log.LogInstant;
import org.apache.derby.iapi.store.raw.xact.RawTransaction;
import org.apache.derby.iapi.services.locks.Lockable;
import org.apache.derby.catalog.UUID;
import org.apache.derby.iapi.error.StandardException;
import org.apache.derby.iapi.services.sanity.SanityManager;
import org.apache.derby.iapi.store.raw.ContainerKey;
import java.util.Observable;
/**
Drop a table on a commit or abort
*/
public class DropOnCommit extends ContainerActionOnCommit {
protected boolean isStreamContainer = false;
/*
** Methods of Observer
*/
public DropOnCommit(ContainerKey identity) {
super(identity);
}
public DropOnCommit(ContainerKey identity, boolean isStreamContainer) {
super(identity);
this.isStreamContainer = isStreamContainer;
}
/**
Called when the transaction is about to complete.
@see java.util.Observer#update
*/
public void update(Observable obj, Object arg) {
if (SanityManager.DEBUG) {
if (arg == null)
SanityManager.THROWASSERT("still on observer list " + this);
}
if (arg.equals(RawTransaction.COMMIT) ||
arg.equals(RawTransaction.ABORT)) {
RawTransaction xact = (RawTransaction) obj;
try {
if (this.isStreamContainer)
xact.dropStreamContainer(
identity.getSegmentId(), identity.getContainerId());
else
xact.dropContainer(identity);
} catch (StandardException se) {
xact.setObserverException(se);
}
obj.deleteObserver(this);
// DERBY-3993
// make sure any observer that may have been added by either
// dropContainer() or dropStreamContainer() is also handled.
// The calling notifyObservers() call from Xact.doComplete()
// may not "see" new observers added during processing of the
// initial observer list.
xact.notifyObservers(arg);
}
}
}