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package com.orbekk.same;
import java.util.List;
import java.util.LinkedList;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* The implementation of a 'Same' state.
*
* This class manages the current state of the Same protocol.
*/
public class SameState extends Thread {
private Logger logger = LoggerFactory.getLogger(getClass());
private List<String> participants = new LinkedList<String>();
private String currentState = "";
private String networkName;
private boolean stopped = false;
/**
* Queue for pending participants.
*/
private List<String> pendingParticipants = new LinkedList<String>();
public SameState(String networkName) {
this.networkName = networkName;
}
public synchronized List<String> getParticipants() {
return participants;
}
public String getNetworkName() {
return networkName;
}
public String getCurrentState() {
return currentState;
}
public synchronized void addParticipant(String url) {
synchronized(this) {
logger.info("Add pending participant: {}", url);
pendingParticipants.add(url);
notifyAll();
}
}
private synchronized void handleNewParticipants() {
for (String url : pendingParticipants) {
logger.info("New participant: {}", url);
participants.add(url);
}
pendingParticipants.clear();
}
public synchronized void run() {
while (!stopped) {
handleNewParticipants();
try {
wait(1000);
} catch (InterruptedException e) {
// Ignore interrupt in wait loop.
}
}
}
public synchronized void stopSame() {
try {
stopped = true;
notifyAll();
this.join();
} catch (InterruptedException e) {
logger.warn("Got InterruptedException while waiting for SameState " +
"to finish. Ignoring.");
}
}
}
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