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This commit is contained in:
Edward Capriolo
2015-01-17 18:21:57 -05:00
parent 4506fe4a79
commit 17f1ad6f4f
14 changed files with 811 additions and 725 deletions
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85
src/main/java/com/google/code/gossip/manager/ActiveGossipThread.java
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@ -8,51 +8,52 @@ import com.google.code.gossip.GossipService;
import com.google.code.gossip.LocalGossipMember;
/**
* [The active thread: periodically send gossip request.]
* The class handles gossiping the membership list.
* This information is important to maintaining a common
* state among all the nodes, and is important for detecting
* failures.
* [The active thread: periodically send gossip request.] The class handles gossiping the membership
* list. This information is important to maintaining a common state among all the nodes, and is
* important for detecting failures.
*/
abstract public class ActiveGossipThread implements Runnable {
private GossipManager _gossipManager;
private final AtomicBoolean _keepRunning;
public ActiveGossipThread(GossipManager gossipManager) {
_gossipManager = gossipManager;
_keepRunning = new AtomicBoolean(true);
}
private GossipManager _gossipManager;
@Override
public void run() {
while(_keepRunning.get()) {
try {
TimeUnit.MILLISECONDS.sleep(_gossipManager.getSettings().getGossipInterval());
sendMembershipList(_gossipManager.getMyself(), _gossipManager.getMemberList());
} catch (InterruptedException e) {
GossipService.LOGGER.error(e);
_keepRunning.set(false);
}
}
shutdown();
}
public void shutdown(){
_keepRunning.set(false);
}
/**
* Performs the sending of the membership list, after we have
* incremented our own heartbeat.
*/
abstract protected void sendMembershipList(LocalGossipMember me, ArrayList<LocalGossipMember> memberList);
private final AtomicBoolean _keepRunning;
/**
* Abstract method which should be implemented by a subclass.
* This method should return a member of the list to gossip with.
* @param memberList The list of members which are stored in the local list of members.
* @return The chosen LocalGossipMember to gossip with.
*/
abstract protected LocalGossipMember selectPartner(ArrayList<LocalGossipMember> memberList);
public ActiveGossipThread(GossipManager gossipManager) {
_gossipManager = gossipManager;
_keepRunning = new AtomicBoolean(true);
}
@Override
public void run() {
while (_keepRunning.get()) {
try {
TimeUnit.MILLISECONDS.sleep(_gossipManager.getSettings().getGossipInterval());
sendMembershipList(_gossipManager.getMyself(), _gossipManager.getMemberList());
} catch (InterruptedException e) {
GossipService.LOGGER.error(e);
_keepRunning.set(false);
}
}
shutdown();
}
public void shutdown() {
_keepRunning.set(false);
}
/**
* Performs the sending of the membership list, after we have incremented our own heartbeat.
*/
abstract protected void sendMembershipList(LocalGossipMember me,
ArrayList<LocalGossipMember> memberList);
/**
* Abstract method which should be implemented by a subclass. This method should return a member
* of the list to gossip with.
*
* @param memberList
* The list of members which are stored in the local list of members.
* @return The chosen LocalGossipMember to gossip with.
*/
abstract protected LocalGossipMember selectPartner(ArrayList<LocalGossipMember> memberList);
}