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package com.orbekk.same;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class MasterServiceImpl implements MasterService, UrlReceiver, Runnable {
private Logger logger = LoggerFactory.getLogger(getClass());
private ConnectionManager connections;
private State state;
private boolean stopped = false;
private Broadcaster broadcaster;
public MasterServiceImpl(State initialState, ConnectionManager connections,
Broadcaster broadcaster) {
state = initialState;
this.broadcaster = broadcaster;
}
@Override
public void joinNetworkRequest(String networkName, String clientUrl) {
if (networkName.equals(state.getDataOf(".networkName"))) {
List<String> participants = participants();
if (!participants.contains(clientUrl)) {
participants.add(clientUrl);
synchronized(this) {
notifyAll();
}
} else {
logger.warn("Client {} already part of network. " +
"Ignoring participation request", clientUrl);
}
state.updateFromObject(".participants", participants,
state.getRevision(".participants"));
} else {
logger.warn("Client {} tried to join {}, but network name is {}",
new Object[]{ clientUrl, networkName,
state.getDataOf(".networkName") });
}
}
public boolean _handleJoinNetworkRequests() {
boolean worked = false;
for (final String component : state.getAndClearUpdatedComponents()) {
logger.info("Broadcasting new component {}", state.show(component));
broadcaster.broadcast(participants(), new ServiceOperation() {
@Override public void run(ClientService client) {
client.setState(component, state.getDataOf(component),
state.getRevision(component));
}
});
worked = true;
}
return worked;
}
private List<String> participants() {
return state.getList(".participants");
}
@Override
public boolean updateStateRequest(String component, String newData, long revision) {
// TODO Auto-generated method stub
return false;
}
@Override
public void setUrl(String url) {
String myUrl = url + "MasterService.json";
logger.info("Master URL is " + myUrl);
state.update(".masterUrl", myUrl, 0);
}
boolean _performWork() {
boolean worked = false;
worked |= _handleJoinNetworkRequests();
return worked;
}
@Override
public void run() {
while (!stopped) {
if (_performWork()) {
synchronized (this) {
try {
wait(500);
} catch (InterruptedException e) {
// Ignore interrupt in wait loop.
}
}
}
}
}
}
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