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/**
* Copyright 2012 Kjetil Ørbekk <kjetil.orbekk@gmail.com>
*
* 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.orbekk.same.directory;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.protobuf.RpcCallback;
import com.google.protobuf.RpcController;
import com.orbekk.same.Services;
import com.orbekk.same.Services.Empty;
import com.orbekk.same.Services.MasterState;
import com.orbekk.same.Services.NetworkDirectory;
public class DirectoryServiceImpl extends Services.Directory {
private Logger logger = LoggerFactory.getLogger(getClass());
public final static long EXPIRE_TIME = 15 * 60l * 1000; // 15 minutes
List<NetworkEntry> networkList = new ArrayList<NetworkEntry>();
synchronized void cleanNetworkList() {
long expiredTime = System.currentTimeMillis() - EXPIRE_TIME;
for (Iterator<NetworkEntry> it = networkList.iterator(); it.hasNext();) {
NetworkEntry e = it.next();
if (e.hasExpired(expiredTime)) {
it.remove();
}
}
logger.info("Cleaned network list. Networks: {}", networkList);
}
public void registerNetwork(String networkName, String masterUrl) {
cleanNetworkList();
NetworkEntry entry = new NetworkEntry(networkName, masterUrl);
entry.register(System.currentTimeMillis());
networkList.remove(entry);
networkList.add(entry);
}
@Override
public void registerNetwork(RpcController controller, MasterState request,
RpcCallback<Empty> done) {
registerNetwork(request.getNetworkName(), request.getMasterLocation());
done.run(Empty.getDefaultInstance());
}
@Override
public void getNetworks(RpcController controller, Empty request,
RpcCallback<NetworkDirectory> done) {
cleanNetworkList();
NetworkDirectory.Builder directory = NetworkDirectory.newBuilder();
for (NetworkEntry e : networkList) {
directory.addNetwork(MasterState.newBuilder()
.setMasterLocation(e.masterUrl)
.setNetworkName(e.networkName)
.build());
}
done.run(directory.build());
}
}
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