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package com.sos.scheduler.engine.kernel.monitorwindow;
import com.sos.scheduler.engine.kernel.Scheduler;
import com.sos.scheduler.engine.kernel.event.Event;
import com.sos.scheduler.engine.kernel.event.EventSubscriber;
import com.sos.scheduler.engine.kernel.order.jobchain.JobChain;
import com.sos.scheduler.engine.kernel.order.jobchain.Node;
import com.sos.scheduler.engine.kernel.order.Order;
import com.sos.scheduler.engine.kernel.order.OrderStateChangedEvent;
import com.sos.scheduler.engine.kernel.order.jobchain.OrderQueueNode;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.Writer;
//TODO Test-Beispiel. Könnte über Annotation aktiviert werden, etwa @Monitor.
/** Beispiel, für die Beobachtung der Scheduler-Ereignisse. */
public class Monitor implements EventSubscriber {
private final Scheduler scheduler;
private final Writer output = new PrintWriter(System.err);
public Monitor(Scheduler scheduler) {
this.scheduler = scheduler;
}
public final void close() {
scheduler.getEventSubsystem().unsubscribe(this);
}
public final void activate() {
scheduler.getEventSubsystem().subscribe(this);
showJobChains();
}
@Override public final void onEvent(Event e) throws IOException {
if (e instanceof OrderStateChangedEvent)
processOrderStateChangeEvent((OrderStateChangedEvent)e);
}
private void processOrderStateChangeEvent(OrderStateChangedEvent e) throws IOException {
Order order = e.getObject();
JobChain jobChain = order.jobChainOrNull();
if (jobChain != null) {
showJobChain(jobChain);
output.flush();
}
}
private void showJobChains() {
for (JobChain jobChain: scheduler.getOrderSubsystem().jobChains()) showJobChain(jobChain);
}
private void showJobChain(JobChain jobChain) {
try {
output.write("***Monitor*** " + jobChain.getName() + ": " );
for (Node node: jobChain.getNodes()) showNode(node);
output.write("\n");
}
catch (IOException x) { throw new RuntimeException(x); }
}
private void showNode(Node node) throws IOException {
output.write(node.getOrderState().getString());
if (node instanceof OrderQueueNode) {
OrderQueueNode n = (OrderQueueNode)node;
output.write("(" + n.getOrderQueue().size() + " orders)");
}
output.write(" ");
}
}