/*
* RED5 Open Source Flash Server - http://code.google.com/p/red5/
*
* Copyright 2006-2012 by respective authors (see below). All rights reserved.
*
* 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.red5.server.net.rtmpt;
import java.util.Arrays;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.atomic.AtomicLong;
import org.apache.commons.lang3.ArrayUtils;
import org.apache.mina.core.buffer.IoBuffer;
import org.red5.server.net.rtmp.IRTMPHandler;
import org.red5.server.net.rtmp.RTMPConnection;
import org.red5.server.net.rtmp.codec.RTMP;
import org.red5.server.net.rtmp.codec.RTMPProtocolDecoder;
import org.red5.server.net.rtmp.codec.RTMPProtocolEncoder;
import org.red5.server.net.rtmp.message.Packet;
import org.red5.server.net.rtmpt.codec.RTMPTProtocolDecoder;
import org.red5.server.net.rtmpt.codec.RTMPTProtocolEncoder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public abstract class BaseRTMPTConnection extends RTMPConnection {
private static final Logger log = LoggerFactory.getLogger(BaseRTMPTConnection.class);
/**
* Protocol decoder
*/
private RTMPTProtocolDecoder decoder;
/**
* Protocol encoder
*/
private RTMPTProtocolEncoder encoder;
/**
* Holder for data destined for a requester that is not ready to be sent.
*/
private static class PendingData {
// simple packet
private final Packet packet;
// encoded packet data
private final byte[] byteBuffer;
private PendingData(IoBuffer buffer, Packet packet) {
int size = buffer.limit();
this.byteBuffer = new byte[size];
buffer.get(byteBuffer);
this.packet = packet;
log.debug("Buffer: {}", Arrays.toString(ArrayUtils.subarray(byteBuffer, 0, 32)));
}
private PendingData(IoBuffer buffer) {
int size = buffer.limit();
this.byteBuffer = new byte[size];
buffer.get(byteBuffer);
this.packet = null;
log.debug("Buffer: {}", Arrays.toString(ArrayUtils.subarray(byteBuffer, 0, 32)));
}
public byte[] getBuffer() {
log.debug("Get buffer: {}", Arrays.toString(ArrayUtils.subarray(byteBuffer, 0, 32)));
return byteBuffer;
}
public Packet getPacket() {
return packet;
}
public int getBufferSize() {
if (byteBuffer != null) {
return byteBuffer.length;
}
return 0;
}
}
/**
* List of pending messages
*/
private ConcurrentLinkedQueue<PendingData> pendingMessages = new ConcurrentLinkedQueue<PendingData>();
/**
* Closing flag
*/
private volatile boolean closing;
/**
* Number of read bytes
*/
private AtomicLong readBytes = new AtomicLong(0);
/**
* Number of written bytes
*/
private AtomicLong writtenBytes = new AtomicLong(0);
/**
* Byte buffer
*/
private volatile IoBuffer buffer;
/**
* RTMP events handler
*/
private volatile IRTMPHandler handler;
public BaseRTMPTConnection(String type) {
super(type);
this.buffer = IoBuffer.allocate(0).setAutoExpand(true);
}
/**
* Return any pending messages up to a given size.
*
* @param targetSize the size the resulting buffer should have
* @return a buffer containing the data to send or null if no messages are
* pending
*/
abstract public IoBuffer getPendingMessages(int targetSize);
/** {@inheritDoc} */
@Override
public void close() {
log.debug("close - state: {}", state.getState());
// defer actual closing so we can send back pending messages to the client
closing = true;
}
/**
* Getter for property 'closing'.
*
* @return Value for property 'closing'.
*/
public boolean isClosing() {
return closing;
}
/**
* Real close
*/
public void realClose() {
if (isClosing()) {
if (buffer != null) {
buffer.free();
buffer = null;
}
state.setState(RTMP.STATE_DISCONNECTED);
pendingMessages.clear();
super.close();
}
}
/**
* Send raw data down the connection.
*
* @param packet the buffer containing the raw data
*/
@Override
public void writeRaw(IoBuffer packet) {
log.debug("Adding pending message from raw packet");
pendingMessages.add(new PendingData(packet));
}
/** {@inheritDoc} */
@Override
public long getReadBytes() {
return readBytes.get();
}
/** {@inheritDoc} */
@Override
public long getWrittenBytes() {
return writtenBytes.get();
}
/** {@inheritDoc} */
@Override
public long getPendingMessages() {
log.debug("Checking pending queue size");
return pendingMessages.size();
}
/**
* Decode data sent by the client.
*
* @param data the data to decode
* @return a list of decoded objects
*/
public List<?> decode(IoBuffer data) {
log.debug("decode");
if (closing || state.getState() == RTMP.STATE_DISCONNECTED) {
// connection is being closed, don't decode any new packets
return Collections.EMPTY_LIST;
}
readBytes.addAndGet(data.limit());
buffer.put(data);
buffer.flip();
return decoder.decodeBuffer(state, buffer);
}
/**
* Send RTMP packet down the connection.
*
* @param packet the packet to send
*/
@Override
public void write(final Packet packet) {
log.debug("write - packet: {}", packet);
log.trace("state: {}", state);
if (closing || state.getState() == RTMP.STATE_DISCONNECTED) {
// connection is being closed, don't send any new packets
log.debug("No write completed due to connection disconnecting");
} else {
IoBuffer data = null;
try {
data = encoder.encodePacket(state, packet);
if (data != null) {
// add to pending
log.debug("Adding pending message from packet");
pendingMessages.add(new PendingData(data, packet));
} else {
log.warn("Response buffer was null after encoding");
}
} catch (Exception e) {
log.error("Could not encode message {}", packet, e);
}
}
}
protected IoBuffer foldPendingMessages(int targetSize) {
log.debug("foldPendingMessages - target size: {}", targetSize);
IoBuffer result = null;
if (!pendingMessages.isEmpty()) {
int sendSize = 0;
LinkedList<PendingData> sendList = new LinkedList<PendingData>();
while (!pendingMessages.isEmpty()) {
// get the buffer size
int limit = pendingMessages.peek().getBufferSize();
if ((limit + sendSize) < targetSize) {
if (sendList.add(pendingMessages.poll())) {
sendSize += limit;
}
} else {
if (sendSize == 0) {
if (sendList.add(pendingMessages.poll())) {
sendSize = limit;
}
}
break;
}
}
log.debug("Send size: {}", sendSize);
result = IoBuffer.allocate(sendSize);
for (PendingData pendingMessage : sendList) {
result.put(pendingMessage.getBuffer());
Packet packet = pendingMessage.getPacket();
if (packet != null) {
try {
handler.messageSent(this, packet);
// mark packet as being written
writingMessage(packet);
} catch (Exception e) {
log.error("Could not notify stream subsystem about sent message", e);
}
} else {
log.debug("Pending message did not have a packet");
}
}
sendList.clear();
result.flip();
writtenBytes.addAndGet(sendSize);
}
return result;
}
public void setHandler(IRTMPHandler handler) {
this.handler = handler;
}
public void setDecoder(RTMPProtocolDecoder decoder) {
this.decoder = (RTMPTProtocolDecoder) decoder;
}
public void setEncoder(RTMPProtocolEncoder encoder) {
this.encoder = (RTMPTProtocolEncoder) encoder;
this.encoder.setConnection(this);
}
}