/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.sshd.common.io.nio2;
import java.io.IOException;
import java.net.SocketAddress;
import java.nio.channels.AsynchronousChannelGroup;
import java.nio.channels.AsynchronousSocketChannel;
import org.apache.sshd.common.FactoryManager;
import org.apache.sshd.common.future.DefaultSshFuture;
import org.apache.sshd.common.io.IoConnectFuture;
import org.apache.sshd.common.io.IoConnector;
import org.apache.sshd.common.io.IoHandler;
import org.apache.sshd.common.io.IoSession;
import org.apache.sshd.common.util.GenericUtils;
import org.apache.sshd.common.util.ValidateUtils;
/**
*/
public class Nio2Connector extends Nio2Service implements IoConnector {
public Nio2Connector(FactoryManager manager, IoHandler handler, AsynchronousChannelGroup group) {
super(manager, handler, group);
}
@Override
public IoConnectFuture connect(SocketAddress address) {
if (log.isDebugEnabled()) {
log.debug("Connecting to {}", address);
}
IoConnectFuture future = new DefaultIoConnectFuture(null);
try {
AsynchronousChannelGroup group = getChannelGroup();
AsynchronousSocketChannel socket =
setSocketOptions(openAsynchronousSocketChannel(address, group));
Nio2CompletionHandler<Void, Object> completionHandler =
ValidateUtils.checkNotNull(createConnectionCompletionHandler(future, socket, getFactoryManager(), getIoHandler()),
"No connection completion handler created for %s",
address);
socket.connect(address, null, completionHandler);
} catch (Throwable exc) {
Throwable t = GenericUtils.peelException(exc);
if (log.isDebugEnabled()) {
log.debug("connect({}) failed ({}) to schedule connection: {}",
address, t.getClass().getSimpleName(), t.getMessage());
}
if (log.isTraceEnabled()) {
log.trace("connect(" + address + ") connection failure details", t);
}
future.setException(t);
}
return future;
}
protected AsynchronousSocketChannel openAsynchronousSocketChannel(
SocketAddress address, AsynchronousChannelGroup group) throws IOException {
return AsynchronousSocketChannel.open(group);
}
protected Nio2CompletionHandler<Void, Object> createConnectionCompletionHandler(
final IoConnectFuture future, final AsynchronousSocketChannel socket, final FactoryManager manager, final IoHandler handler) {
return new Nio2CompletionHandler<Void, Object>() {
@Override
@SuppressWarnings("synthetic-access")
protected void onCompleted(Void result, Object attachment) {
try {
Nio2Session session = createSession(manager, handler, socket);
handler.sessionCreated(session);
sessions.put(session.getId(), session);
future.setSession(session);
session.startReading();
} catch (Throwable exc) {
Throwable t = GenericUtils.peelException(exc);
if (log.isDebugEnabled()) {
log.debug("onCompleted - failed {} to start session: {}",
t.getClass().getSimpleName(), t.getMessage());
}
if (log.isTraceEnabled()) {
log.trace("onCompleted - session creation failure details", t);
}
try {
socket.close();
} catch (IOException err) {
if (log.isDebugEnabled()) {
log.debug("onCompleted - failed {} to close socket: {}", err.getClass().getSimpleName(), err.getMessage());
}
}
future.setException(t);
}
}
@Override
protected void onFailed(final Throwable exc, final Object attachment) {
future.setException(exc);
}
};
}
protected Nio2Session createSession(FactoryManager manager, IoHandler handler, AsynchronousSocketChannel socket) throws Throwable {
return new Nio2Session(this, manager, handler, socket);
}
public static class DefaultIoConnectFuture extends DefaultSshFuture<IoConnectFuture> implements IoConnectFuture {
public DefaultIoConnectFuture(Object lock) {
super(lock);
}
@Override
public IoSession getSession() {
Object v = getValue();
return v instanceof IoSession ? (IoSession) v : null;
}
@Override
public Throwable getException() {
Object v = getValue();
return v instanceof Throwable ? (Throwable) v : null;
}
@Override
public boolean isConnected() {
return getValue() instanceof IoSession;
}
@Override
public void setSession(IoSession session) {
setValue(session);
}
@Override
public void setException(Throwable exception) {
setValue(exception);
}
}
}