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/*
* JBoss, Home of Professional Open Source.
* Copyright 2012, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.cli.impl;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import javax.net.ssl.SSLContext;
import javax.security.auth.callback.CallbackHandler;
import org.jboss.as.cli.CommandLineException;
import org.jboss.as.cli.Util;
import org.jboss.as.cli.impl.ModelControllerClientFactory.ConnectionCloseHandler;
import org.jboss.as.controller.client.impl.AbstractModelControllerClient;
import org.jboss.as.protocol.ProtocolChannelClient;
import org.jboss.as.protocol.StreamUtils;
import org.jboss.as.protocol.mgmt.ManagementChannelAssociation;
import org.jboss.as.protocol.mgmt.ManagementChannelHandler;
import org.jboss.as.protocol.mgmt.ManagementClientChannelStrategy;
import org.wildfly.security.manager.GetAccessControlContextAction;
import org.jboss.dmr.ModelNode;
import org.jboss.remoting3.Channel;
import org.jboss.remoting3.CloseHandler;
import org.jboss.remoting3.Connection;
import org.jboss.remoting3.Endpoint;
import org.jboss.remoting3.Remoting;
import org.jboss.remoting3.RemotingOptions;
import org.jboss.remoting3.remote.HttpUpgradeConnectionProviderFactory;
import org.jboss.remoting3.remote.RemoteConnectionProviderFactory;
import org.jboss.threads.JBossThreadFactory;
import org.xnio.OptionMap;
import org.xnio.Options;
import static java.security.AccessController.doPrivileged;
/**
* @author Alexey Loubyansky
*
*/
public class CLIModelControllerClient extends AbstractModelControllerClient {
private static final OptionMap DEFAULT_OPTIONS = OptionMap.create(RemotingOptions.TRANSMIT_WINDOW_SIZE, ProtocolChannelClient.Configuration.DEFAULT_WINDOW_SIZE,
RemotingOptions.RECEIVE_WINDOW_SIZE, ProtocolChannelClient.Configuration.DEFAULT_WINDOW_SIZE);
private static final ThreadPoolExecutor executorService;
private static final Endpoint endpoint;
static {
final BlockingQueue workQueue = new LinkedBlockingQueue();
final ThreadFactory threadFactory = new JBossThreadFactory(new ThreadGroup("cli-remoting"), Boolean.FALSE, null,
"%G - %t", null, null, doPrivileged(GetAccessControlContextAction.getInstance()));
executorService = new ThreadPoolExecutor(2, 4, 60L, TimeUnit.SECONDS, workQueue, threadFactory);
// Allow the core threads to time out as well
executorService.allowCoreThreadTimeOut(true);
try {
endpoint = Remoting.createEndpoint("cli-client", OptionMap.create(Options.THREAD_DAEMON, true));
endpoint.addConnectionProvider("remote", new RemoteConnectionProviderFactory(), OptionMap.EMPTY);
endpoint.addConnectionProvider("http-remoting", new HttpUpgradeConnectionProviderFactory(), OptionMap.create(Options.SSL_ENABLED, Boolean.FALSE));
endpoint.addConnectionProvider("https-remoting", new HttpUpgradeConnectionProviderFactory(), OptionMap.create(Options.SSL_ENABLED, Boolean.TRUE));
} catch (IOException e) {
throw new IllegalStateException("Failed to create remoting endpoint", e);
}
CliShutdownHook.add(new CliShutdownHook.Handler() {
@Override
public void shutdown() {
executorService.shutdown();
try {
executorService.awaitTermination(1, TimeUnit.SECONDS);
} catch (InterruptedException e) {}
try {
endpoint.close();
} catch (IOException e) {}
}
});
}
private final Object lock = "lock";
private final CallbackHandler handler;
private final SSLContext sslContext;
private final ConnectionCloseHandler closeHandler;
private final ManagementChannelHandler channelAssociation;
private ManagementClientChannelStrategy strategy;
private final ProtocolChannelClient.Configuration channelConfig;
private boolean closed;
CLIModelControllerClient(final String protocol, CallbackHandler handler, String hostName, int connectionTimeout,
final ConnectionCloseHandler closeHandler, int port, SSLContext sslContext) throws IOException {
this.handler = handler;
this.sslContext = sslContext;
this.closeHandler = closeHandler;
this.channelAssociation = new ManagementChannelHandler(new ManagementClientChannelStrategy() {
@Override
public Channel getChannel() throws IOException {
return getOrCreateChannel();
}
@Override
public void close() throws IOException {
}
}, executorService, this);
channelConfig = new ProtocolChannelClient.Configuration();
try {
channelConfig.setUri(new URI(protocol +"://" + formatPossibleIpv6Address(hostName) + ":" + port));
} catch (URISyntaxException e) {
throw new IOException("Failed to create URI" , e);
}
channelConfig.setOptionMap(DEFAULT_OPTIONS);
if(connectionTimeout > 0) {
channelConfig.setConnectionTimeout(connectionTimeout);
}
channelConfig.setEndpoint(endpoint);
}
@Override
protected ManagementChannelAssociation getChannelAssociation() throws IOException {
return channelAssociation;
}
protected Channel getOrCreateChannel() throws IOException {
synchronized(lock) {
if (strategy == null) {
final ProtocolChannelClient setup = ProtocolChannelClient.create(channelConfig);
final ChannelCloseHandler channelCloseHandler = new ChannelCloseHandler();
strategy = ManagementClientChannelStrategy.create(setup, channelAssociation, handler, null, sslContext,
channelCloseHandler);
channelCloseHandler.setOriginalStrategy(strategy);
}
lock.notifyAll();
return strategy.getChannel();
}
}
public boolean isConnected() {
return strategy != null;
}
@Override
public void close() throws IOException {
if(closed) {
return;
}
synchronized (lock) {
if(closed) {
return;
}
closed = true;
// Don't allow any new request
channelAssociation.shutdown();
// First close the channel and connection
if (strategy != null) {
StreamUtils.safeClose(strategy);
strategy = null;
}
// Cancel all still active operations
channelAssociation.shutdownNow();
try {
channelAssociation.awaitCompletion(1, TimeUnit.SECONDS);
} catch (InterruptedException ignore) {
Thread.currentThread().interrupt();
}
lock.notifyAll();
}
}
public ModelNode execute(ModelNode operation, boolean awaitClose) throws IOException {
final ModelNode response = super.execute(operation);
if(!Util.isSuccess(response)) {
return response;
}
if (awaitClose) {
synchronized(lock) {
if(strategy != null) {
try {
lock.wait(5000);
} catch (InterruptedException e) {
}
StreamUtils.safeClose(strategy);
strategy = null;
}
}
}
return response;
}
public boolean isClosed() {
return closed;
}
public void ensureConnected(long timeoutMillis) throws CommandLineException {
boolean doTry = true;
final long start = System.currentTimeMillis();
IOException ioe = null;
while (doTry) {
synchronized (lock) {
try {
getOrCreateChannel().getConnection();
doTry = false;
} catch (IOException e) {
ioe = e;
if (strategy != null) {
StreamUtils.safeClose(strategy);
strategy = null;
}
}
lock.notifyAll();
}
if (ioe != null) {
if (System.currentTimeMillis() - start > timeoutMillis) {
throw new CommandLineException("Failed to establish connection in " + (System.currentTimeMillis() - start)
+ "ms", ioe);
}
ioe = null;
try {
Thread.sleep(500);
} catch (InterruptedException e) {
throw new CommandLineException("Interrupted while pausing before reconnecting.", e);
}
}
}
}
private static String formatPossibleIpv6Address(String address) {
if (address == null) {
return address;
}
if (!address.contains(":")) {
return address;
}
if (address.startsWith("[") && address.endsWith("]")) {
return address;
}
return "[" + address + "]";
}
private final class ChannelCloseHandler implements CloseHandler {
private ManagementClientChannelStrategy originalStrategy;
void setOriginalStrategy(ManagementClientChannelStrategy strategy) {
if(originalStrategy != null) {
throw new IllegalArgumentException("The strategy has already been initialized.");
}
originalStrategy = strategy;
}
@Override
public void handleClose(final Channel closed, final IOException exception) {
if(CLIModelControllerClient.this.closed) {
return;
}
synchronized(lock) {
if (strategy != null) {
if(strategy != originalStrategy) {
new Exception("Channel close handler " + strategy + " " + originalStrategy).printStackTrace();
}
strategy = null;
closeHandler.handleClose();
}
channelAssociation.handleChannelClosed(closed, exception);
lock.notifyAll();
}
// Closing the strategy in this handler may result in race conditions
// with connection closing and then deadlocks in remoting
// it's safer to close the strategy from the connection close handler
closed.getConnection().addCloseHandler(new CloseHandler(){
@Override
public void handleClose(Connection closed, IOException exception) {
StreamUtils.safeClose(originalStrategy);
}});
}
}
}
