io.undertow.websockets.core.BinaryOutputStream 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 2014 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * 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 io.undertow.websockets.core;

import io.undertow.UndertowMessages;
import org.xnio.channels.Channels;

import java.io.IOException;
import java.io.OutputStream;
import java.nio.ByteBuffer;

/**
 * {@link OutputStream} implementation which buffers all the data until {@link #close()} is called and then will
 * try to send it in a blocking fashion with the provided {@link StreamSinkFrameChannel}.
 *
 * @author Norman Maurer
 */
public final class BinaryOutputStream extends OutputStream {
    private final StreamSinkFrameChannel sender;
    private boolean closed;

    public BinaryOutputStream(StreamSinkFrameChannel sender) {
        this.sender = sender;
    }

    @Override
    public void write(byte[] b, int off, int len) throws IOException {
        checkClosed();
        if(Thread.currentThread() == sender.getIoThread()) {
            throw UndertowMessages.MESSAGES.awaitCalledFromIoThread();
        }
        Channels.writeBlocking(sender, ByteBuffer.wrap(b, off, len));
    }

    @Override
    public void write(int b) throws IOException {
        checkClosed();
        if(Thread.currentThread() == sender.getIoThread()) {
            throw UndertowMessages.MESSAGES.awaitCalledFromIoThread();
        }
        Channels.writeBlocking(sender, ByteBuffer.wrap(new byte[]{(byte) b}));
    }

    @Override
    public void flush() throws IOException {
        checkClosed();
        if(Thread.currentThread() == sender.getIoThread()) {
            throw UndertowMessages.MESSAGES.awaitCalledFromIoThread();
        }
        sender.flush();
    }

    @Override
    public void close() throws IOException {
        if (!closed) {
            closed = true;
            sender.shutdownWrites();
            Channels.flushBlocking(sender);
        }
    }

    private void checkClosed() throws IOException {
        if (closed) {
            throw UndertowMessages.MESSAGES.streamIsClosed();
        }
    }
}