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/*-
* ============LICENSE_START=======================================================
* openECOMP : APP-C
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. 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.
* ============LICENSE_END=========================================================
*/
package org.openecomp.appc.lockmanager.impl.sql.optimistic;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import org.openecomp.appc.lockmanager.impl.sql.Synchronizer;
import org.openecomp.appc.lockmanager.impl.sql.SynchronizerReceiver;
import org.openecomp.appc.lockmanager.impl.sql.optimistic.LockRecord;
import org.openecomp.appc.lockmanager.impl.sql.optimistic.MySqlLockManager;
class MySqlLockManagerMock extends MySqlLockManager implements SynchronizerReceiver {
private final ConcurrentMap<String, LockRecord> locks = new ConcurrentHashMap<>();
private boolean useReal;
private Synchronizer synchronizer;
MySqlLockManagerMock(boolean useReal) {
this.useReal = useReal;
}
@Override
public void setSynchronizer(Synchronizer synchronizer) {
this.synchronizer = synchronizer;
}
@Override
protected Connection openDbConnection() {
if(useReal) {
return super.openDbConnection();
}
return null;
}
@Override
protected void closeDbConnection(Connection connection) {
if(useReal) {
super.closeDbConnection(connection);
}
}
@Override
protected LockRecord loadLockRecord(Connection connection, String resource) throws SQLException {
LockRecord res;
if(useReal) {
res = super.loadLockRecord(connection, resource);
} else {
res = locks.get(resource);
}
if(synchronizer != null) {
synchronizer.postLoadLockRecord(resource, (res == null) ? null : res.getOwner());
}
return res;
}
@Override
protected void addLockRecord(Connection connection, String resource, String owner, long timeout) throws SQLException {
if(synchronizer != null) {
synchronizer.preAddLockRecord(resource, owner);
}
try {
if(useReal) {
super.addLockRecord(connection, resource, owner, timeout);
return;
}
LockRecord lockRecord = new LockRecord(resource);
lockRecord.setOwner(owner);
lockRecord.setUpdated(System.currentTimeMillis());
lockRecord.setTimeout(timeout);
lockRecord.setVer(1);
LockRecord prevLockRecord = locks.putIfAbsent(resource, lockRecord);
if(prevLockRecord != null) {
// simulate unique constraint violation
throw new SQLException("Duplicate PK exception", "23000", 1062);
}
} finally {
if(synchronizer != null) {
synchronizer.postAddLockRecord(resource, owner);
}
}
}
@Override
protected boolean updateLockRecord(Connection connection, String resource, String owner, long timeout, long ver) throws SQLException {
if(synchronizer != null) {
synchronizer.preUpdateLockRecord(resource, owner);
}
try {
if(useReal) {
return super.updateLockRecord(connection, resource, owner, timeout, ver);
}
LockRecord lockRecord = loadLockRecord(connection, resource);
synchronized(lockRecord) {
// should be atomic operation
if(ver != lockRecord.getVer()) {
return false;
}
lockRecord.setOwner(owner);
lockRecord.setUpdated(System.currentTimeMillis());
lockRecord.setTimeout(timeout);
lockRecord.setVer(ver + 1);
}
return true;
} finally {
if(synchronizer != null) {
synchronizer.postUpdateLockRecord(resource, owner);
}
}
}
}
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