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https://github.com/correl/mage.git
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* Session locking - Fixed some problems with the reentrant lock.
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parent
2af52cfd3a
commit
896793b93d
4 changed files with 92 additions and 47 deletions
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@ -63,6 +63,7 @@ import java.net.InetAddress;
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import java.net.MalformedURLException;
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import java.util.HashMap;
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import java.util.Map;
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import static mage.server.Session.getBasicCause;
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import org.jboss.remoting.transport.bisocket.BisocketServerInvoker;
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@ -213,18 +214,16 @@ public class Main {
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//SessionManager.getInstance().disconnect(client.getSessionId(), DisconnectReason.Disconnected);
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SessionManager.getInstance().disconnect(client.getSessionId(), DisconnectReason.LostConnection);
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logger.info("CLIENT DISCONNECTED - " + sessionInfo, throwable);
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if (logger.isDebugEnabled()) {
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throwable.printStackTrace();
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}
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logger.debug("Stack Trace", throwable);
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}
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else {
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SessionManager.getInstance().disconnect(client.getSessionId(), DisconnectReason.LostConnection);
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logger.info("CONNECTION LOST - " + sessionInfo, throwable);
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logger.info("LOST CONNECTION - " + sessionInfo);
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if (logger.isDebugEnabled()) {
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if (throwable == null) {
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logger.debug("Lease expired");
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logger.debug("- cause: Lease expired");
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} else {
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throwable.printStackTrace();
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logger.debug(" - cause: " + Session.getBasicCause(throwable).toString());
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}
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}
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}
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@ -33,7 +33,6 @@ import java.util.LinkedList;
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import java.util.List;
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import java.util.UUID;
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import java.util.concurrent.TimeUnit;
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import java.util.concurrent.locks.Lock;
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import java.util.concurrent.locks.ReentrantLock;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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@ -213,8 +212,10 @@ public class Session {
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// because different threads can activate this
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public void userLostConnection() {
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boolean lockSet = false;
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try {
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if(lock.tryLock(5, TimeUnit.SECONDS)) {
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if(lock.tryLock(500, TimeUnit.MILLISECONDS)) {
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lockSet = true;
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User user = UserManager.getInstance().getUser(userId);
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if (user == null || !user.isConnected()) {
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return; //user was already disconnected by other thread
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@ -224,46 +225,70 @@ public class Session {
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logger.info("OLD SESSION IGNORED - " + user.getName());
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return;
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}
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logger.info("LOST CONNECTION - " + user.getName());
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logger.info("LOST CONNECTION - " + user.getName() + " id: " + userId);
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UserManager.getInstance().disconnect(userId, DisconnectReason.LostConnection);
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} else {
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logger.error("SESSION LOCK - userId " + userId);
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logger.error("SESSION LOCK lost connection - userId: " + userId);
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}
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} catch (InterruptedException ex) {
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logger.error("SESSION LOCK - userId " + userId, ex);
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logger.error("SESSION LOCK lost connection - userId: " + userId, ex);
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}
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finally {
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lock.unlock();
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if (lockSet) {
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lock.unlock();
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}
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}
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}
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public void kill(DisconnectReason reason) {
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UserManager.getInstance().removeUser(userId, reason);
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boolean lockSet = false;
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try {
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if(lock.tryLock(500, TimeUnit.MILLISECONDS)) {
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lockSet = true;
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UserManager.getInstance().removeUser(userId, reason);
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} else {
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logger.error("SESSION LOCK - kill: userId " + userId);
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}
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} catch (InterruptedException ex) {
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logger.error("SESSION LOCK - kill: userId " + userId, ex);
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}
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finally {
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if (lockSet) {
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lock.unlock();
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}
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}
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}
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public void fireCallback(final ClientCallback call) {
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boolean lockSet = false;
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try {
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boolean tryLock;
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if (lock.tryLock(5, TimeUnit.SECONDS)) {
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if (lock.tryLock(500, TimeUnit.MILLISECONDS)) {
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lockSet = true;
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call.setMessageId(messageId++);
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callbackHandler.handleCallbackOneway(new Callback(call));
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} else {
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logger.error("CALLBACK LOCK - userId " + userId);
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logger.error("SESSION LOCK callback: userId " + userId);
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logger.error(" - method: " + call.getMethod());
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}
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} catch (HandleCallbackException ex) {
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logger.info("CALLBACK EXCEPTION - userId " + userId, ex);
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if (logger.isDebugEnabled()) {
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ex.printStackTrace();
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}
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User user = UserManager.getInstance().getUser(userId);
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logger.warn("SESSION CALLBACK EXCEPTION - " + (user != null ? user.getName():"") + " userId " + userId);
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logger.warn(" - method: " + call.getMethod());
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logger.warn(" - cause: " + getBasicCause(ex).toString());
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logger.trace("Stack trace:", ex);
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userLostConnection();
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} catch (InterruptedException ex) {
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logger.error("CALLBACK LOCK EXCEPTION - userId " + userId, ex);
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logger.error("SESSION LOCK callback -userId: " + userId);
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logger.error(" - method: " + call.getMethod());
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logger.error(" - cause: " + getBasicCause(ex).toString());
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logger.trace("Stack trace:", ex);
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}
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finally {
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lock.unlock();
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if (lockSet) {
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lock.unlock();
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}
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}
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}
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@ -293,4 +318,15 @@ public class Session {
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messageData.add(message);
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fireCallback(new ClientCallback("showUserMessage", null, messageData));
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}
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public static Throwable getBasicCause(Throwable cause) {
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Throwable t = cause;
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while (t.getCause() != null) {
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t = t.getCause();
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if (t == cause) {
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throw new IllegalArgumentException("Infinite cycle detected in causal chain");
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}
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}
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return t;
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}
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}
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@ -115,28 +115,26 @@ public class SessionManager {
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Session session = sessions.get(sessionId);
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if (session != null) {
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if (!reason.equals(DisconnectReason.AdminDisconnect)) {
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synchronized (session) {
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if (!sessions.containsKey(sessionId)) {
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// session was removed meanwhile by another thread so we can return
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return;
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}
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sessions.remove(sessionId);
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switch (reason) {
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case Disconnected:
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session.kill(reason);
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LogServiceImpl.instance.log(LogKeys.KEY_SESSION_KILLED, sessionId);
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break;
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case SessionExpired:
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session.kill(reason);
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LogServiceImpl.instance.log(LogKeys.KEY_SESSION_EXPIRED, sessionId);
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break;
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case LostConnection:
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session.userLostConnection();
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LogServiceImpl.instance.log(LogKeys.KEY_SESSION_DISCONNECTED, sessionId);
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break;
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default:
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logger.error("endSession: unexpected reason " + reason.toString() + " - sessionId: "+ sessionId);
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}
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if (!sessions.containsKey(sessionId)) {
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// session was removed meanwhile by another thread so we can return
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return;
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}
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sessions.remove(sessionId);
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switch (reason) {
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case Disconnected:
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session.kill(reason);
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LogServiceImpl.instance.log(LogKeys.KEY_SESSION_KILLED, sessionId);
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break;
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case SessionExpired:
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session.kill(reason);
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LogServiceImpl.instance.log(LogKeys.KEY_SESSION_EXPIRED, sessionId);
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break;
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case LostConnection:
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session.userLostConnection();
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LogServiceImpl.instance.log(LogKeys.KEY_SESSION_DISCONNECTED, sessionId);
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break;
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default:
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logger.error("endSession: unexpected reason " + reason.toString() + " - sessionId: "+ sessionId);
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}
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} else {
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sessions.remove(sessionId);
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@ -29,6 +29,7 @@ package mage.server;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.Iterator;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.Map;
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@ -123,14 +124,25 @@ public class User {
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this.sessionId = sessionId;
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if (sessionId.isEmpty()) {
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userState = UserState.Disconnected;
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logger.debug("Disconnected User " + userName + " id: " + userId);
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lostConnection();
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logger.debug("USER - lost connection: " + userName + " id: " + userId);
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} else if (userState == UserState.Created) {
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userState = UserState.Connected;
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logger.debug("Created user " + userName + " id: " + userId);
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logger.debug("USER - created: " + userName + " id: " + userId);
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} else {
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userState = UserState.Reconnected;
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reconnect();
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logger.info("Reconnected user " + userName + " id: " + userId);
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logger.info("USER - reconnected: " + userName + " id: " + userId);
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}
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}
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public void lostConnection() {
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// Because watched games don't get restored after reconnection call stop watching
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for (Iterator<UUID> iterator = watchedGames.iterator(); iterator.hasNext();) {
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UUID gameId = iterator.next();
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GameManager.getInstance().stopWatching(gameId, userId);
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iterator.remove();
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}
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}
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