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/*
* Copyright 2006-2012 Amazon Technologies, Inc. or its affiliates.
* Amazon, Amazon.com and Carbonado are trademarks or registered trademarks
* of Amazon Technologies, Inc. or its affiliates. All rights reserved.
*
* Licensed 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 com.amazon.carbonado.repo.logging;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;
import com.amazon.carbonado.IsolationLevel;
import com.amazon.carbonado.PersistException;
import com.amazon.carbonado.Transaction;
/**
*
*
* @author Brian S O'Neill
*/
class LoggingTransaction implements Transaction {
private static final AtomicLong mNextID = new AtomicLong();
private final ThreadLocal<LoggingTransaction> mActiveTxn;
private final LoggingTransaction mParent;
private final Log mLog;
private final Transaction mTxn;
private final long mID;
private final boolean mTop;
LoggingTransaction(ThreadLocal<LoggingTransaction> activeTxn,
Log log, Transaction txn, boolean top)
{
mActiveTxn = activeTxn;
mParent = activeTxn.get();
mLog = log;
mTxn = txn;
mID = mNextID.addAndGet(1);
mTop = top;
activeTxn.set(this);
mLog.write("Entered transaction: " + idChain());
}
public void commit() throws PersistException {
mLog.write("Transaction.commit() on " + idChain());
mTxn.commit();
}
public void exit() throws PersistException {
mLog.write("Transaction.exit() on " + idChain());
mTxn.exit();
mActiveTxn.set(mParent);
}
public void setForUpdate(boolean forUpdate) {
if (mLog.isEnabled()) {
mLog.write("Transaction.setForUpdate(" + forUpdate + ") on " + idChain());
}
mTxn.setForUpdate(forUpdate);
}
public boolean isForUpdate() {
return mTxn.isForUpdate();
}
public void setDesiredLockTimeout(int timeout, TimeUnit unit) {
mTxn.setDesiredLockTimeout(timeout, unit);
}
public IsolationLevel getIsolationLevel() {
return mTxn.getIsolationLevel();
}
public void detach() {
if (mLog.isEnabled()) {
mLog.write("Transaction.detach() on " + idChain());
}
mTxn.detach();
}
public void attach() {
if (mLog.isEnabled()) {
mLog.write("Transaction.attach() on " + idChain());
}
mTxn.attach();
}
public boolean preCommit() throws PersistException {
mLog.write("Transaction.preCommit() on " + idChain());
return mTxn.preCommit();
}
private String idChain() {
if (mParent == null) {
return String.valueOf(mID);
}
if (mTop) {
return mParent.idChain() + " | " + mID;
} else {
return mParent.idChain() + " > " + mID;
}
}
}
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