//
// 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 com.cloud.utils.nio;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.channels.SocketChannel;
import java.security.GeneralSecurityException;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLEngine;
import org.apache.cloudstack.utils.security.SSLUtils;
import org.apache.log4j.Logger;
public class NioClient extends NioConnection {
private static final Logger s_logger = Logger.getLogger(NioClient.class);
protected String _host;
protected SocketChannel _clientConnection;
public NioClient(final String name, final String host, final int port, final int workers, final HandlerFactory factory) {
super(name, port, workers, factory);
_host = host;
}
@Override
protected void init() throws IOException {
_selector = Selector.open();
Task task = null;
try {
_clientConnection = SocketChannel.open();
s_logger.info("Connecting to " + _host + ":" + _port);
final InetSocketAddress peerAddr = new InetSocketAddress(_host, _port);
_clientConnection.connect(peerAddr);
_clientConnection.configureBlocking(false);
final SSLContext sslContext = Link.initSSLContext(true);
SSLEngine sslEngine = sslContext.createSSLEngine(_host, _port);
sslEngine.setUseClientMode(true);
sslEngine.setEnabledProtocols(SSLUtils.getSupportedProtocols(sslEngine.getEnabledProtocols()));
sslEngine.beginHandshake();
if (!Link.doHandshake(_clientConnection, sslEngine, true)) {
s_logger.error("SSL Handshake failed while connecting to host: " + _host + " port: " + _port);
_selector.close();
throw new IOException("SSL Handshake failed while connecting to host: " + _host + " port: " + _port);
}
s_logger.info("SSL: Handshake done");
s_logger.info("Connected to " + _host + ":" + _port);
final Link link = new Link(peerAddr, this);
link.setSSLEngine(sslEngine);
final SelectionKey key = _clientConnection.register(_selector, SelectionKey.OP_READ);
link.setKey(key);
key.attach(link);
// Notice we've already connected due to the handshake, so let's get the
// remaining task done
task = _factory.create(Task.Type.CONNECT, link, null);
} catch (final GeneralSecurityException e) {
_selector.close();
throw new IOException("Failed to initialise security", e);
} catch (final IOException e) {
_selector.close();
throw e;
}
_executor.submit(task);
}
@Override
protected void registerLink(final InetSocketAddress saddr, final Link link) {
// don't do anything.
}
@Override
protected void unregisterLink(final InetSocketAddress saddr) {
// don't do anything.
}
@Override
public void cleanUp() throws IOException {
super.cleanUp();
if (_clientConnection != null) {
_clientConnection.close();
}
s_logger.info("NioClient connection closed");
}
}