public ClusterMessage requestCompleted(String sessionId) {
if (!getDistributable()) {
log.warn(
"Received requestCompleted message, although this context["
+ getName()
+ "] is not distributable. Ignoring message");
return null;
}
try {
if (invalidatedSessions.get(sessionId) != null) {
synchronized (invalidatedSessions) {
invalidatedSessions.remove(sessionId);
SessionMessage msg =
new SessionMessageImpl(
name, SessionMessage.EVT_SESSION_EXPIRED, null, sessionId, sessionId);
return msg;
}
} else {
ReplicatedSession session = (ReplicatedSession) findSession(sessionId);
if (session != null) {
// return immediately if the session is not dirty
if (useDirtyFlag && (!session.isDirty())) {
// but before we return doing nothing,
// see if we should send
// an updated last access message so that
// sessions across cluster dont expire
long interval = session.getMaxInactiveInterval();
long lastaccdist = System.currentTimeMillis() - session.getLastAccessWasDistributed();
if (((interval * 1000) / lastaccdist) < 3) {
SessionMessage accmsg =
new SessionMessageImpl(
name, SessionMessage.EVT_SESSION_ACCESSED, null, sessionId, sessionId);
session.setLastAccessWasDistributed(System.currentTimeMillis());
return accmsg;
}
return null;
}
session.setIsDirty(false);
if (log.isDebugEnabled()) {
try {
log.debug("Sending session to cluster=" + session);
} catch (Exception ignore) {
}
}
SessionMessage msg =
new SessionMessageImpl(
name,
SessionMessage.EVT_SESSION_CREATED,
writeSession(session),
session.getIdInternal(),
session.getIdInternal());
return msg;
} // end if
} // end if
} catch (Exception x) {
log.error("Unable to replicate session", x);
}
return null;
}
/**
* This method is called by the received thread when a SessionMessage has been received from one
* of the other nodes in the cluster.
*
* @param msg - the message received
* @param sender - the sender of the message, this is used if we receive a EVT_GET_ALL_SESSION
* message, so that we only reply to the requesting node
*/
protected void messageReceived(SessionMessage msg, Member sender) {
try {
if (log.isInfoEnabled()) {
log.debug("Received SessionMessage of type=" + msg.getEventTypeString());
log.debug("Received SessionMessage sender=" + sender);
}
switch (msg.getEventType()) {
case SessionMessage.EVT_GET_ALL_SESSIONS:
{
// get a list of all the session from this manager
Object[] sessions = findSessions();
java.io.ByteArrayOutputStream bout = new java.io.ByteArrayOutputStream();
java.io.ObjectOutputStream oout = new java.io.ObjectOutputStream(bout);
oout.writeInt(sessions.length);
for (int i = 0; i < sessions.length; i++) {
ReplicatedSession ses = (ReplicatedSession) sessions[i];
oout.writeUTF(ses.getIdInternal());
byte[] data = writeSession(ses);
oout.writeObject(data);
} // for
// don't send a message if we don't have to
oout.flush();
oout.close();
byte[] data = bout.toByteArray();
SessionMessage newmsg =
new SessionMessageImpl(
name,
SessionMessage.EVT_ALL_SESSION_DATA,
data,
"SESSION-STATE",
"SESSION-STATE-" + getName());
cluster.send(newmsg, sender);
break;
}
case SessionMessage.EVT_ALL_SESSION_DATA:
{
java.io.ByteArrayInputStream bin = new java.io.ByteArrayInputStream(msg.getSession());
java.io.ObjectInputStream oin = new java.io.ObjectInputStream(bin);
int size = oin.readInt();
for (int i = 0; i < size; i++) {
String id = oin.readUTF();
byte[] data = (byte[]) oin.readObject();
Session session = readSession(data, id);
} // for
stateTransferred = true;
break;
}
case SessionMessage.EVT_SESSION_CREATED:
{
Session session = this.readSession(msg.getSession(), msg.getSessionID());
if (log.isDebugEnabled()) {
log.debug("Received replicated session=" + session + " isValid=" + session.isValid());
}
break;
}
case SessionMessage.EVT_SESSION_EXPIRED:
{
Session session = findSession(msg.getSessionID());
if (session != null) {
session.expire();
this.remove(session);
} // end if
break;
}
case SessionMessage.EVT_SESSION_ACCESSED:
{
Session session = findSession(msg.getSessionID());
if (session != null) {
session.access();
session.endAccess();
}
break;
}
default:
{
// we didn't recognize the message type, do nothing
break;
}
} // switch
} catch (Exception x) {
log.error("Unable to receive message through TCP channel", x);
}
}
