0N/A/*
2362N/A * Copyright (c) 1996, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
2362N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A */
0N/A
0N/Apackage sun.misc;
0N/A
0N/A/**
0N/A * The request processor allows functors (Request instances) to be created
0N/A * in arbitrary threads, and to be posted for execution in a non-restricted
0N/A * thread.
0N/A *
0N/A * @author Steven B. Byrne
0N/A */
0N/A
0N/A
0N/Apublic class RequestProcessor implements Runnable {
0N/A
0N/A private static Queue requestQueue;
0N/A private static Thread dispatcher;
0N/A
0N/A /**
0N/A * Queues a Request instance for execution by the request procesor
0N/A * thread.
0N/A */
0N/A public static void postRequest(Request req) {
0N/A lazyInitialize();
0N/A requestQueue.enqueue(req);
0N/A }
0N/A
0N/A /**
0N/A * Process requests as they are queued.
0N/A */
0N/A public void run() {
0N/A lazyInitialize();
0N/A while (true) {
0N/A try {
0N/A Object obj = requestQueue.dequeue();
0N/A if (obj instanceof Request) { // ignore bogons
0N/A Request req = (Request)obj;
0N/A try {
0N/A req.execute();
0N/A } catch (Throwable t) {
0N/A // do nothing at the moment...maybe report an error
0N/A // in the future
0N/A }
0N/A }
0N/A } catch (InterruptedException e) {
0N/A // do nothing at the present time.
0N/A }
0N/A }
0N/A }
0N/A
0N/A
0N/A /**
0N/A * This method initiates the request processor thread. It is safe
0N/A * to call it after the thread has been started. It provides a way for
0N/A * clients to deliberately control the context in which the request
0N/A * processor thread is created
0N/A */
0N/A public static synchronized void startProcessing() {
0N/A if (dispatcher == null) {
0N/A dispatcher = new Thread(new RequestProcessor(), "Request Processor");
0N/A dispatcher.setPriority(Thread.NORM_PRIORITY + 2);
0N/A dispatcher.start();
0N/A }
0N/A }
0N/A
0N/A
0N/A /**
0N/A * This method performs lazy initialization.
0N/A */
0N/A private static synchronized void lazyInitialize() {
0N/A if (requestQueue == null) {
0N/A requestQueue = new Queue();
0N/A }
0N/A }
0N/A
0N/A}