/**
* Copyright 2008 the original author or authors.
*
* 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 net.sf.katta.client;
import net.sf.katta.protocol.ConnectedComponent;
import net.sf.katta.protocol.InteractionProtocol;
import net.sf.katta.protocol.metadata.IndexMetaData;
import net.sf.katta.util.ZkConfiguration.PathDef;
import org.I0Itec.zkclient.IZkDataListener;
import org.apache.log4j.Logger;
public class IndexDeployFuture implements IIndexDeployFuture, IZkDataListener, ConnectedComponent {
private static Logger LOG = Logger.getLogger(IndexDeployFuture.class);
private final InteractionProtocol _protocol;
private final String _indexName;
private volatile boolean _registered;
public IndexDeployFuture(InteractionProtocol protocol, String indexName) {
_protocol = protocol;
_indexName = indexName;
_protocol.registerComponent(this);
_protocol.registerDataListener(this, PathDef.INDICES_METADATA, indexName, this);
_registered = true;
}
public synchronized IndexState getState() {
if (!_registered) {
return IndexState.DEPLOYED;
}
IndexMetaData indexMD = _protocol.getIndexMD(_indexName);
if (indexMD == null) {
return IndexState.DEPLOYING;
} else if (indexMD.hasDeployError()) {
return IndexState.ERROR;
}
if (_registered) {
_registered = false;
_protocol.unregisterComponent(this);
}
return IndexState.DEPLOYED;
}
private boolean isDeploymentRunning() {
return getState() == IndexState.DEPLOYING;
}
public synchronized IndexState joinDeployment() throws InterruptedException {
while (isDeploymentRunning()) {
wait(3000);
}
return getState();
}
public synchronized IndexState joinDeployment(long maxTime) throws InterruptedException {
long startJoin = System.currentTimeMillis();
while (isDeploymentRunning()) {
wait(maxTime);
maxTime = maxTime - (System.currentTimeMillis() - startJoin);
if (maxTime <= 0) {
break;
}
}
return getState();
}
@Override
public synchronized void handleDataChange(String dataPath, Object data) {
wakeSleeper();
}
public synchronized void handleDataDeleted(String dataPath) {
_registered = false;
_protocol.unregisterComponent(this);
wakeSleeper();
}
private synchronized void wakeSleeper() {
notifyAll();
}
@Override
public void reconnect() {
// sg: we just want to make sure we get the very latest state of the
// index, since we might missed a event. With zookeeper 3.x we should still
// have subscribed notifications and don't need to re-subscribe
LOG.warn("Reconnecting IndexDeployFuture");
wakeSleeper();
}
@Override
public void disconnect() {
// nothing
}
}