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This module contains the Metro runtime code.
/*
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* and Distribution License("CDDL") (collectively, the "License"). You
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package com.sun.xml.ws.rx.util;
import com.sun.istack.NotNull;
import com.sun.istack.Nullable;
import com.sun.xml.ws.api.message.Packet;
import com.sun.xml.ws.api.pipe.Engine;
import com.sun.xml.ws.api.pipe.Fiber;
import com.sun.xml.ws.api.pipe.Fiber.CompletionCallback;
import com.sun.xml.ws.api.pipe.FiberContextSwitchInterceptor;
import com.sun.xml.ws.api.pipe.Tube;
import com.sun.xml.ws.util.Pool;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.Executor;
/**
* TODO javadoc
*
*
* WARNING: This class is a private utility class used by WS-RX implementation. Any usage outside
* the intended scope is strongly discouraged. The API exposed by this class may be changed, replaced
* or removed without any advance notice.
*
*
* @author Marek Potociar
*/
public final class FiberExecutor {
private static class Schedule {
private final Packet request;
private final Fiber.CompletionCallback completionCallback;
public Schedule(Packet request, CompletionCallback completionCallback) {
this.request = request;
this.completionCallback = completionCallback;
}
}
private Pool tubelinePool;
private volatile Engine engine;
private final List schedules = new LinkedList();
private Executor executor;
public FiberExecutor(String id, Tube masterTubeline) {
this.tubelinePool = new Pool.TubePool(masterTubeline);
// In-line Executor runs the task in the caller's thread
// (so as to prevent thread hopping)
executor =
new Executor() {
@Override
public void execute(Runnable command) {
command.run();
}
};
this.engine = new Engine(id, executor);
}
public Packet runSync(Packet request) {
final Tube tubeline = tubelinePool.take();
try {
return engine.createFiber().runSync(tubeline, request);
} finally {
tubelinePool.recycle(tubeline);
}
}
public synchronized void schedule(Packet request, @NotNull final Fiber.CompletionCallback callback) {
schedules.add(new Schedule(request, callback));
}
public synchronized void startScheduledFibers() {
Iterator iterator = schedules.iterator();
while (iterator.hasNext()) {
Schedule schedule = iterator.next();
iterator.remove();
start(schedule.request, schedule.completionCallback, null);
}
}
public void start(Packet request,
@NotNull final Fiber.CompletionCallback callback,
@Nullable FiberContextSwitchInterceptor interceptor) {
Fiber fiber = engine.createFiber();
if (interceptor != null) {
fiber.addInterceptor(interceptor);
}
final Tube tube = tubelinePool.take();
fiber.start(tube, request, new Fiber.CompletionCallback() {
public void onCompletion(@NotNull Packet response) {
tubelinePool.recycle(tube);
callback.onCompletion(response);
}
public void onCompletion(@NotNull Throwable error) {
// let's not reuse tubes as they might be in a wrong state, so not
// calling tubePool.recycle()
callback.onCompletion(error);
}
});
}
public void close() {
Pool tp = this.tubelinePool;
if (tp != null) {
// multi-thread safety of 'close' needs to be considered more carefully.
// some calls might be pending while this method is invoked. Should we
// block until they are complete, or should we abort them (but how?)
Tube p = tp.take();
p.preDestroy();
this.tubelinePool = null;
this.engine = null;
this.schedules.clear();
}
Executor fes = this.executor;
if (fes != null) {
this.executor = null;
}
}
}