Java tutorial
/* * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved. * * This program and the accompanying materials are made available under the * terms of the Eclipse Public License v1.0 which accompanies this distribution, * and is available at http://www.eclipse.org/legal/epl-v10.html */ package org.opendaylight.controller.netconf.ssh.osgi; import static com.google.common.base.Preconditions.checkState; import com.google.common.base.Optional; import com.google.common.base.Strings; import io.netty.channel.local.LocalAddress; import io.netty.channel.nio.NioEventLoopGroup; import java.io.IOException; import java.net.InetSocketAddress; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.ScheduledExecutorService; import java.util.concurrent.ThreadFactory; import org.apache.commons.io.FilenameUtils; import org.apache.sshd.common.util.ThreadUtils; import org.apache.sshd.server.keyprovider.PEMGeneratorHostKeyProvider; import org.opendaylight.controller.netconf.ssh.SshProxyServer; import org.opendaylight.controller.netconf.ssh.SshProxyServerConfigurationBuilder; import org.opendaylight.controller.netconf.util.osgi.NetconfConfigUtil; import org.opendaylight.controller.netconf.util.osgi.NetconfConfigUtil.InfixProp; import org.osgi.framework.BundleActivator; import org.osgi.framework.BundleContext; import org.slf4j.Logger; import org.slf4j.LoggerFactory; public class NetconfSSHActivator implements BundleActivator { private static final Logger LOG = LoggerFactory.getLogger(NetconfSSHActivator.class); private static final java.lang.String ALGORITHM = "RSA"; private static final int KEY_SIZE = 4096; public static final int POOL_SIZE = 8; private static final int DEFAULT_IDLE_TIMEOUT = Integer.MAX_VALUE; private ScheduledExecutorService minaTimerExecutor; private NioEventLoopGroup clientGroup; private ExecutorService nioExecutor; private AuthProviderTracker authProviderTracker; private SshProxyServer server; @Override public void start(final BundleContext bundleContext) throws IOException { minaTimerExecutor = Executors.newScheduledThreadPool(POOL_SIZE, new ThreadFactory() { @Override public Thread newThread(final Runnable r) { return new Thread(r, "netconf-ssh-server-mina-timers"); } }); clientGroup = new NioEventLoopGroup(); nioExecutor = ThreadUtils.newFixedThreadPool("netconf-ssh-server-nio-group", POOL_SIZE); server = startSSHServer(bundleContext); } @Override public void stop(final BundleContext context) throws IOException { if (server != null) { server.close(); } if (authProviderTracker != null) { authProviderTracker.stop(); } if (nioExecutor != null) { nioExecutor.shutdownNow(); } if (clientGroup != null) { clientGroup.shutdownGracefully(); } if (minaTimerExecutor != null) { minaTimerExecutor.shutdownNow(); } } private SshProxyServer startSSHServer(final BundleContext bundleContext) throws IOException { final Optional<InetSocketAddress> maybeSshSocketAddress = NetconfConfigUtil .extractNetconfServerAddress(bundleContext, InfixProp.ssh); if (maybeSshSocketAddress.isPresent() == false) { LOG.trace("SSH bridge not configured"); return null; } final InetSocketAddress sshSocketAddress = maybeSshSocketAddress.get(); LOG.trace("Starting netconf SSH bridge at {}", sshSocketAddress); final LocalAddress localAddress = NetconfConfigUtil.getNetconfLocalAddress(); authProviderTracker = new AuthProviderTracker(bundleContext); final String path = FilenameUtils.separatorsToSystem(NetconfConfigUtil.getPrivateKeyPath(bundleContext)); checkState(!Strings.isNullOrEmpty(path), "Path to ssh private key is blank. Reconfigure %s", NetconfConfigUtil.getPrivateKeyKey()); final SshProxyServer sshProxyServer = new SshProxyServer(minaTimerExecutor, clientGroup, nioExecutor); sshProxyServer.bind(new SshProxyServerConfigurationBuilder().setBindingAddress(sshSocketAddress) .setLocalAddress(localAddress).setAuthenticator(authProviderTracker) .setKeyPairProvider(new PEMGeneratorHostKeyProvider(path, ALGORITHM, KEY_SIZE)) .setIdleTimeout(DEFAULT_IDLE_TIMEOUT).createSshProxyServerConfiguration()); return sshProxyServer; } }