| /* |
| |
| Derby - Class org.apache.derby.impl.store.raw.data.TruncateOnCommit |
| |
| 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.services.monitor.DerbyObservable; |
| |
| 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.ContainerKey; |
| |
| 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.shared.common.sanity.SanityManager; |
| |
| /** |
| Truncate a temp table on a commit, abort or rollback to savepoint |
| */ |
| |
| public class TruncateOnCommit extends ContainerHandleActionOnCommit { |
| |
| /** |
| Truncate on a commit as well. |
| */ |
| private boolean commitAsWell; |
| |
| public TruncateOnCommit(ContainerKey identity, boolean commitAsWell) { |
| |
| super(identity); |
| this.commitAsWell = commitAsWell; |
| |
| if (SanityManager.DEBUG) { |
| if (identity.getSegmentId() != ContainerHandle.TEMPORARY_SEGMENT) |
| SanityManager.THROWASSERT("segment id is not temp segment " + identity.getSegmentId()); |
| } |
| } |
| |
| public void update(DerbyObservable obj, Object arg) { |
| if (SanityManager.DEBUG) { |
| if (arg == null) |
| SanityManager.THROWASSERT("still on observer list " + this); |
| } |
| |
| if (arg.equals(RawTransaction.ABORT) || |
| arg.equals(RawTransaction.SAVEPOINT_ROLLBACK) || |
| (commitAsWell && arg.equals(RawTransaction.COMMIT))) { |
| openContainerAndDoIt((RawTransaction) obj); |
| } |
| |
| // remove this object if we are commiting, aborting or the container is being dropped |
| if (arg.equals(RawTransaction.COMMIT) || arg.equals(RawTransaction.ABORT) |
| || arg.equals(identity)) { |
| obj.deleteObserver(this); |
| } |
| } |
| |
| /** |
| @exception StandardException Standard Derby error policy |
| */ |
| protected void doIt(BaseContainerHandle handle) |
| throws StandardException { |
| |
| handle.container.truncate(handle); |
| } |
| |
| public boolean equals(Object other) { |
| |
| if (other instanceof TruncateOnCommit) { |
| |
| if (((TruncateOnCommit) other).commitAsWell |
| != commitAsWell) |
| return false; |
| |
| return super.equals(other); |
| } |
| else |
| return false; |
| } |
| } |