/** {@inheritDoc} */
public void endMaintenance() {
log.info("Resuming transport listeners, senders and tasks from maintenance mode...");
// resume transport listeners and senders
Axis2TransportHelper transportHelper = new Axis2TransportHelper(configurationContext);
transportHelper.resumeListeners();
transportHelper.resumeSenders();
// resume tasks
SynapseTaskManager synapseTaskManager = synapseEnvironment.getTaskManager();
if (synapseTaskManager.isInitialized()) {
synapseTaskManager.resumeAll();
}
log.info("Resumed normal operation from maintenance mode");
}
/** {@inheritDoc} */
public void startMaintenance() {
log.info("Putting transport listeners, senders and tasks into maintenance mode..");
// pause transport listeners and senders
Axis2TransportHelper transportHelper = new Axis2TransportHelper(configurationContext);
transportHelper.pauseListeners();
transportHelper.pauseSenders();
// put tasks on hold
SynapseTaskManager synapseTaskManager = synapseEnvironment.getTaskManager();
if (synapseTaskManager.isInitialized()) {
synapseTaskManager.pauseAll();
}
log.info("Entered maintenance mode");
}
/**
* Waits until it is safe to stop or the the specified end time has been reached. A delay of
* <code>waitIntervalMillis</code> milliseconds is used between each subsequent check. If the
* state "safeToStop" is reached before the specified <code>endTime</code>, the return value is
* true.
*
* @param waitIntervalMillis the pause time (delay) in milliseconds between subsequent checks
* @param endTime the time until which the checks need to finish successfully
* @return true, if a safe state is reached before the specified <code>endTime</code>, otherwise
* false (forceful stop required)
*/
public boolean waitUntilSafeToStop(long waitIntervalMillis, long endTime) {
boolean safeToStop = false;
boolean forcefulStop = false;
Axis2TransportHelper transportHelper = new Axis2TransportHelper(configurationContext);
// wait until it is safe to shutdown (listeners and tasks are idle, no callbacks)
while (!safeToStop && !forcefulStop) {
int pendingListenerThreads = transportHelper.getPendingListenerThreadCount();
if (pendingListenerThreads > 0) {
log.info(
new StringBuilder("Waiting for: ")
.append(pendingListenerThreads)
.append(" listener threads to complete")
.toString());
}
int pendingSenderThreads = transportHelper.getPendingSenderThreadCount();
if (pendingSenderThreads > 0) {
log.info(
new StringBuilder("Waiting for: ")
.append(pendingSenderThreads)
.append(" listener threads to complete")
.toString());
}
int activeConnections = transportHelper.getActiveConnectionsCount();
if (activeConnections > 0) {
log.info("Waiting for: " + activeConnections + " active connections to be closed..");
}
int pendingTransportThreads = pendingListenerThreads + pendingSenderThreads;
int pendingCallbacks = serverContextInformation.getCallbackCount();
if (pendingCallbacks > 0) {
log.info("Waiting for: " + pendingCallbacks + " callbacks/replies..");
}
int runningTasks = 0;
SynapseTaskManager synapseTaskManager = synapseEnvironment.getTaskManager();
if (synapseTaskManager.isInitialized()) {
runningTasks = synapseTaskManager.getTaskScheduler().getRunningTaskCount();
if (runningTasks > 0) {
log.info("Waiting for : " + runningTasks + " tasks to complete..");
}
}
// it is safe to stop if all used listener threads, callbacks and tasks are zero
safeToStop = ((pendingTransportThreads + pendingCallbacks + runningTasks) == 0);
if (safeToStop) {
log.info("All transport threads and tasks are idle and no pending callbacks..");
} else {
if (System.currentTimeMillis() < endTime) {
log.info(
new StringBuilder("Waiting for a maximum of another ")
.append((endTime - System.currentTimeMillis()) / 1000)
.append(" seconds until transport threads and tasks become idle, ")
.append("active connections to get closed,")
.append(" and callbacks to be completed..")
.toString());
try {
Thread.sleep(waitIntervalMillis);
} catch (InterruptedException ignore) {
// nothing to do here
}
} else {
// maximum time to wait is over, do a forceful stop
forcefulStop = true;
}
}
}
return !forcefulStop;
}