com.hierynomus.smbj.transport.PacketReader Maven / Gradle / Ivy

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SMB2 protocol library for communication with Windows servers

There is a newer version: 0.13.0

/*
 * Copyright (C)2016 - SMBJ Contributors
 *
 * 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 com.hierynomus.smbj.transport;

import com.hierynomus.protocol.Packet;
import com.hierynomus.protocol.transport.PacketReceiver;
import com.hierynomus.protocol.transport.TransportException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.InputStream;
import java.util.concurrent.atomic.AtomicBoolean;

public abstract class PacketReader> implements Runnable {
    private static final Logger logger = LoggerFactory.getLogger(PacketReader.class);

    protected InputStream in;
    private PacketReceiver
 handler;

    private AtomicBoolean stopped = new AtomicBoolean(false);
    private Thread thread;

    public PacketReader(String host, InputStream in, PacketReceiver handler) {
        this.in = in;
        this.handler = handler;
        this.thread = new Thread(this, "Packet Reader for " + host);
        this.thread.setDaemon(true);
    }

    @Override
    public void run() {
        while (!Thread.currentThread().isInterrupted() && !stopped.get()) {
            try {
                readPacket();
            } catch (TransportException e) {
                if (stopped.get()) {
                    break;
                }
                logger.info("PacketReader error, got exception.", e);
                handler.handleError(e);
                return;
            }
        }
        if (stopped.get()) {
            logger.info("{} stopped.", thread);
        }
    }

    public void stop() {
        logger.debug("Stopping PacketReader...");
        stopped.set(true);
        thread.interrupt();
    }

    private void readPacket() throws TransportException {
        P packet = doRead();
        logger.debug("Received packet {}", packet);
        handler.handle(packet);
    }

    /**
     * Read the actual SMB2 Packet from the {@link InputStream}
     *
     * @return the read SMB2Packet
     * @throws TransportException
     */
    protected abstract P doRead() throws TransportException;

    public void start() {
        logger.debug("Starting PacketReader on thread: {}", thread.getName());
        this.thread.start();
    }
}