PoolableSocketAppender.java

/**
 * The MIT License
 * Copyright (c) 2014 JMXTrans Team
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.jmxtrans.core.output.support.pool;

import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.net.Socket;
import java.net.SocketAddress;
import java.nio.charset.Charset;

import javax.annotation.Nonnull;

import lombok.AccessLevel;
import lombok.Getter;
import stormpot.Poolable;
import stormpot.Slot;

public class PoolableSocketAppender implements Poolable, Appendable {

    @Nonnull private final Slot slot;
    @Nonnull @Getter(AccessLevel.PACKAGE) private final Socket socket;
    @Nonnull private final Writer writer;

    public PoolableSocketAppender(
            @Nonnull Slot slot,
            @Nonnull Charset charset,
            @Nonnull SocketAddress serverAddress,
            int socketTimeoutMillis) throws IOException {
        this.slot = slot;
        this.socket = new Socket();
        socket.setKeepAlive(false);
        socket.connect(serverAddress, socketTimeoutMillis);
        this.writer = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream(), charset));
    }

    @Override
    public void release() {
        slot.release(this);
    }

    @Override
    public Appendable append(CharSequence csq) throws IOException {
        return writer.append(csq);
    }

    @Override
    public Appendable append(CharSequence csq, int start, int end) throws IOException {
        return writer.append(csq, start, end);
    }

    @Override
    public Appendable append(char c) throws IOException {
        return writer.append(c);
    }

    void close() throws IOException {
        try(
                Socket s = socket;
                Writer w = writer
                ) {
            w.flush();
        }
    }
}