/**
* Copyright (C) 2012 FuseSource, Inc.
* http://fusesource.com
*
* 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.fusesource.hawtdispatch.transport;
import org.fusesource.hawtdispatch.*;
import java.io.EOFException;
import java.io.IOException;
import java.net.SocketAddress;
import java.net.URI;
import java.nio.channels.ReadableByteChannel;
import java.nio.channels.WritableByteChannel;
import java.util.LinkedList;
import java.util.concurrent.Executor;
import java.util.concurrent.atomic.AtomicBoolean;
/**
*
* @author <a href="http://hiramchirino.com">Hiram Chirino</a>
*/
public class PipeTransport implements Transport {
static private final Object EOF_TOKEN = new Object();
final private PipeTransportServer server;
PipeTransport peer;
private TransportListener listener;
private SocketAddress remoteAddress;
private AtomicBoolean stopping = new AtomicBoolean();
private String name;
private boolean marshal;
private boolean trace;
private DispatchQueue dispatchQueue;
private CustomDispatchSource<Object,LinkedList<Object>> dispatchSource;
private boolean connected;
private long writeCounter = 0;
private long readCounter = 0;
private ProtocolCodec protocolCodec;
public PipeTransport(PipeTransportServer server) {
this.server = server;
}
public DispatchQueue getDispatchQueue() {
return dispatchQueue;
}
public void setDispatchQueue(DispatchQueue queue) {
this.dispatchQueue = queue;
}
@Deprecated
public void start(final Runnable onCompleted) {
start(new TaskWrapper(onCompleted));
}
public void start(final Task onCompleted) {
if (dispatchQueue == null) {
throw new IllegalArgumentException("dispatchQueue is not set");
}
server.dispatchQueue.execute(new Task(){
public void run() {
dispatchSource = Dispatch.createSource(EventAggregators.linkedList(), dispatchQueue);
dispatchSource.setEventHandler(new Task() {
public void run() {
try {
final LinkedList<Object> commands = dispatchSource.getData();
for (Object o : commands) {
if (o == EOF_TOKEN) {
throw new EOFException();
}
readCounter++;
listener.onTransportCommand(o);
}
// let the peer know that they have been processed.
peer.dispatchQueue.execute(new Task() {
public void run() {
outbound -= commands.size();
drainInbound();
}
});
} catch (IOException e) {
listener.onTransportFailure(e);
}
}
});
if( peer.dispatchSource != null ) {
fireConnected();
peer.fireConnected();
}
if( onCompleted!=null ) {
onCompleted.run();
}
}
});
}
private void fireConnected() {
dispatchQueue.execute(new Task() {
public void run() {
connected = true;
dispatchSource.resume();
listener.onTransportConnected();
drainInbound();
}
});
}
public void flush() {
listener.onRefill();
}
@Deprecated
public void stop(final Runnable onCompleted) {
stop(new TaskWrapper(onCompleted));
}
public void stop(Task onCompleted) {
if( connected ) {
peer.dispatchSource.merge(EOF_TOKEN);
}
if( dispatchSource!=null ) {
dispatchSource.setCancelHandler(onCompleted);
dispatchSource.cancel();
}
setDispatchQueue(null);
}
static final class OneWay {
final Object command;
final Retained retained;
public OneWay(Object command, Retained retained) {
this.command = command;
this.retained = retained;
}
}
int outbound = 0;
int maxOutbound = 100;
public boolean full() {
return outbound >= maxOutbound;
}
public boolean offer(Object command) {
if( !connected ) {
return false;
}
if( full() ) {
return false;
} else {
transmit(command);
return true;
}
}
public void drainInbound() {
if( !full() ) {
listener.onRefill();
}
}
private void transmit(Object command) {
writeCounter++;
outbound++;
peer.dispatchSource.merge(command);
}
/**
* @return The number of objects sent by the transport.
*/
public long getWriteCounter() {
return writeCounter;
}
/**
* @return The number of objects received by the transport.
*/
public long getReadCounter() {
return readCounter;
}
public SocketAddress getLocalAddress() {
return remoteAddress;
}
public SocketAddress getRemoteAddress() {
return remoteAddress;
}
public void suspendRead() {
dispatchSource.suspend();
}
public void resumeRead() {
dispatchSource.resume();
}
public void setRemoteAddress(final String remoteAddress) {
this.remoteAddress = new SocketAddress() {
@Override
public String toString() {
return remoteAddress;
}
};
if (name == null) {
name = remoteAddress;
}
}
public void setName(String name) {
this.name = name;
}
public TransportListener getTransportListener() {
return listener;
}
public void setTransportListener(TransportListener transportListener) {
this.listener = transportListener;
}
public ProtocolCodec getProtocolCodec() {
return protocolCodec;
}
public void setProtocolCodec(ProtocolCodec protocolCodec) {
this.protocolCodec = protocolCodec;
}
public boolean isTrace() {
return trace;
}
public void setTrace(boolean trace) {
this.trace = trace;
}
public boolean isMarshal() {
return marshal;
}
public void setMarshal(boolean marshall) {
this.marshal = marshall;
}
public boolean isConnected() {
return !stopping.get();
}
public boolean isClosed() {
return false;
}
public Executor getBlockingExecutor() {
return null;
}
public void setBlockingExecutor(Executor blockingExecutor) {
}
public ReadableByteChannel getReadChannel() {
return null;
}
public WritableByteChannel getWriteChannel() {
return null;
}
}