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jsync.io is a non-blocking, event-driven networking framework for Java

There is a newer version: 1.10.13

/*
 * Copyright (c) 2011-2013 The original author or authors
 * ------------------------------------------------------
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Apache License v2.0 which accompanies this distribution.
 *
 *     The Eclipse Public License is available at
 *     http://www.eclipse.org/legal/epl-v10.html
 *
 *     The Apache License v2.0 is available at
 *     http://www.opensource.org/licenses/apache2.0.php
 *
 * You may elect to redistribute this code under either of these licenses.
 */

package io.jsync.impl;

import io.jsync.AsyncResult;
import io.jsync.Handler;

/**
 * Internal class used to run specific blocking actions on the worker pool.
 * 
 * 
This class shouldn't be used directly from user applications.
 *
 * @author Tim Fox
 */
public abstract class BlockingAction {

    private final AsyncInternal async;
    private final Handler> handler;
    protected DefaultContext context;

    public BlockingAction(AsyncInternal async, Handler> handler) {
        this.async = async;
        this.handler = handler;
        context = async.getOrCreateContext();
    }

    /**
     * Run the blocking action using a thread from the worker pool.
     */
    public void run() {
        Runnable runner = new Runnable() {
            public void run() {
                final DefaultFutureResult res = new DefaultFutureResult<>();
                try {
                    res.setResult(action());
                } catch (Exception e) {
                    res.setFailure(e);
                }
                if (handler != null) {
                    context.execute(new Runnable() {
                        public void run() {
                            res.setHandler(handler);
                        }
                    });
                }
            }
        };

        context.executeOnOrderedWorkerExec(runner);
    }

    public abstract T action();

}