org.xnio.nio.NioHandle Maven / Gradle / Ivy

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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * JBoss, Home of Professional Open Source
 *
 * Copyright 2013 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.xnio.nio;

import java.nio.channels.CancelledKeyException;
import java.nio.channels.SelectionKey;

import static org.xnio.Bits.allAreClear;
import static org.xnio.Bits.allAreSet;

/**
 * @author David M. Lloyd
 */
abstract class NioHandle {
    private final WorkerThread workerThread;
    private final SelectionKey selectionKey;

    protected NioHandle(final WorkerThread workerThread, final SelectionKey selectionKey) {
        this.workerThread = workerThread;
        this.selectionKey = selectionKey;
    }

    void resume(final int ops) {
        try {
            if (! allAreSet(selectionKey.interestOps(), ops)) {
                workerThread.setOps(selectionKey, ops);
            }
        } catch (CancelledKeyException ignored) {}
    }

    void wakeup(final int ops) {
        workerThread.queueTask(new Runnable() {
            public void run() {
                handleReady(ops);
            }
        });
        try {
            if (! allAreSet(selectionKey.interestOps(), ops)) {
                workerThread.setOps(selectionKey, ops);
            }
        } catch (CancelledKeyException ignored) {}
    }

    void suspend(final int ops) {
        try {
            if (! allAreClear(selectionKey.interestOps(), ops)) {
                workerThread.clearOps(selectionKey, ops);
            }
        } catch (CancelledKeyException ignored) {}
    }

    boolean isResumed(final int ops) {
        try {
            return allAreSet(selectionKey.interestOps(), ops);
        } catch (CancelledKeyException ignored) {
            return false;
        }
    }

    abstract void handleReady(final int ops);

    abstract void forceTermination();

    abstract void terminated();

    WorkerThread getWorkerThread() {
        return workerThread;
    }

    SelectionKey getSelectionKey() {
        return selectionKey;
    }
}