package com.webobjects.monitor.application.starter;
import com.webobjects.foundation.NSArray;
import com.webobjects.foundation.NSMutableArray;
import com.webobjects.foundation.NSMutableSet;
import com.webobjects.monitor._private.MApplication;
import com.webobjects.monitor._private.MHost;
import com.webobjects.monitor._private.MInstance;
/**
* Bounces an application by refusing new sessions, waiting a while, shutting down all instances, then starting the same instances again.
*
* @author ak
*/
public class ShutdownBouncer extends ApplicationStarter {
private long _time;
public ShutdownBouncer(MApplication app, int seconds) {
super(app);
_time = seconds * 1000;
}
@Override
protected void bounce() throws InterruptedException {
NSArray<MInstance> instances = application().instanceArray().immutableClone();
NSMutableArray<MInstance> runningInstances = new NSMutableArray<MInstance>();
NSMutableSet<MHost> activeHosts = new NSMutableSet<MHost>();
for (MInstance instance : instances) {
MHost host = instance.host();
if (instance.isRunning_M()) {
runningInstances.addObject(instance);
activeHosts.addObject(host);
}
}
handler().sendRefuseSessionToWotaskds(runningInstances, activeHosts.allObjects(), true);
boolean waiting = true;
long startTime = System.currentTimeMillis();
// wait until apps have started
while (waiting && (_time + startTime > System.currentTimeMillis())) {
handler().startReading();
try {
log("Checking for started instances");
handler().getInstanceStatusForHosts(activeHosts.allObjects());
boolean allStopped = false;
for (MInstance instance : runningInstances) {
allStopped &= !instance.isRunning_M();
}
if (allStopped) {
waiting = false;
} else {
sleep(10 * 1000);
}
} finally {
handler().endReading();
}
}
handler().sendStopInstancesToWotaskds(runningInstances, activeHosts.allObjects());
log("Stopped instances sucessfully");
handler().sendRefuseSessionToWotaskds(runningInstances, activeHosts.allObjects(), false);
handler().sendStartInstancesToWotaskds(runningInstances, activeHosts.allObjects());
handler().startReading();
try {
handler().getInstanceStatusForHosts(activeHosts.allObjects());
log("Finished");
} finally {
handler().endReading();
}
}
}