/*
* 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.server.mgmt.domain;
import org.jboss.as.controller.ModelController;
import org.jboss.as.controller.remote.TransactionalProtocolOperationHandler;
import org.jboss.as.protocol.ProtocolConnectionConfiguration;
import org.jboss.as.protocol.ProtocolConnectionManager;
import org.jboss.as.protocol.ProtocolConnectionUtils;
import org.jboss.as.protocol.ProtocolMessages;
import org.jboss.as.protocol.StreamUtils;
import org.jboss.as.protocol.mgmt.AbstractManagementRequest;
import org.jboss.as.protocol.mgmt.ActiveOperation;
import org.jboss.as.protocol.mgmt.FlushableDataOutput;
import org.jboss.as.protocol.mgmt.FutureManagementChannel;
import org.jboss.as.protocol.mgmt.ManagementChannelHandler;
import org.jboss.as.protocol.mgmt.ManagementPingRequest;
import org.jboss.as.protocol.mgmt.ManagementRequestContext;
import org.jboss.as.remoting.management.ManagementRemotingServices;
import org.jboss.as.server.ServerLogger;
import org.jboss.dmr.ModelNode;
import org.jboss.remoting3.Channel;
import org.jboss.remoting3.Connection;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.NameCallback;
import javax.security.auth.callback.PasswordCallback;
import javax.security.auth.callback.UnsupportedCallbackException;
import javax.security.sasl.RealmCallback;
import javax.security.sasl.RealmChoiceCallback;
import java.io.DataInput;
import java.io.IOException;
import java.io.InterruptedIOException;
import java.net.URI;
import java.nio.charset.Charset;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
/**
* The connection to the host-controller. In case the channel is closed it's the host-controllers responsibility
* to ask individual managed servers to reconnect.
*
* @author Emanuel Muckenhuber
*/
class HostControllerConnection extends FutureManagementChannel {
private static final String SERVER_CHANNEL_TYPE = ManagementRemotingServices.SERVER_CHANNEL;
private static final Charset UTF_8 = Charset.forName("UTF-8");
private final String userName;
private final String serverProcessName;
private final ProtocolConnectionManager connectionManager;
private final ManagementChannelHandler channelHandler;
private ProtocolConnectionConfiguration configuration;
HostControllerConnection(final String serverProcessName, final String userName, final ProtocolConnectionConfiguration configuration, final ExecutorService executorService) {
this.userName = userName;
this.serverProcessName = serverProcessName;
this.configuration = configuration;
this.channelHandler = new ManagementChannelHandler(this, executorService);
this.connectionManager = ProtocolConnectionManager.create(configuration, this, new ReconnectTask());
}
ManagementChannelHandler getChannelHandler() {
return channelHandler;
}
@Override
public Channel getChannel() throws IOException {
final Channel channel = super.getChannel();
if(channel == null) {
// Fail fast, don't try to await a new channel
throw ProtocolMessages.MESSAGES.channelClosed();
}
return channel;
}
/**
* Connect to the HC and retrieve the current model updates.
*
* @param controller the server controller
* @param callback the operation completed callback
* @return the boot operations
* @throws IOException for any error
*/
synchronized void openConnection(final ModelController controller, final ActiveOperation.CompletedCallback<ModelNode> callback) throws Exception {
boolean ok = false;
final Connection connection = connectionManager.connect();
try {
channelHandler.executeRequest(new ServerRegisterRequest(), null, callback);
channelHandler.addHandlerFactory(new TransactionalProtocolOperationHandler(controller, channelHandler));
ok = true;
} finally {
if(!ok) {
connection.close();
}
}
}
/**
* Reconnect to the HC.
*
* @param reconnectUri the reconnection uri
* @param authKey the auth key
* @return whether the server is still in sync
* @throws IOException
*/
synchronized boolean reConnect(final URI reconnectUri, byte[] authKey) throws IOException {
// In case we are still connected, test the connection and see if we can reuse it
if(connectionManager.isConnected()) {
try {
final Future<Long> result = channelHandler.executeRequest(ManagementPingRequest.INSTANCE, null).getResult();
result.get(15, TimeUnit.SECONDS); // Hmm, perhaps 15 is already too much
return true;
} catch (Exception e) {
ServerLogger.AS_ROOT_LOGGER.debugf(e, "failed to ping the host-controller, going to reconnect");
}
// Disconnect - the HC might have closed the connection without us noticing and is asking for a reconnect
final Connection connection = connectionManager.getConnection();
StreamUtils.safeClose(connection);
if(connection != null) {
try {
// Wait for the connection to be closed
connection.awaitClosed();
} catch (InterruptedException e) {
throw new InterruptedIOException();
}
}
}
// Tweak the configuration with the new credentials
final ProtocolConnectionConfiguration config = ProtocolConnectionConfiguration.copy(configuration);
config.setCallbackHandler(createClientCallbackHandler(userName, authKey));
config.setUri(reconnectUri);
this.configuration = config;
boolean ok = false;
final Connection connection = connectionManager.connect();
try {
// Reconnect to the host-controller
final ActiveOperation<Boolean, Void> result = channelHandler.executeRequest(new ServerReconnectRequest(), null);
try {
boolean inSync = result.getResult().get();
ok = true;
return inSync;
} catch (ExecutionException e) {
throw new IOException(e);
} catch (InterruptedException e) {
throw new InterruptedIOException();
}
} finally {
if(!ok) {
StreamUtils.safeClose(connection);
}
}
}
/**
* Send the started notification
*/
synchronized void started() {
try {
if(isConnected()) {
channelHandler.executeRequest(new ServerStartedRequest(), null).getResult().await();
}
} catch (Exception e) {
ServerLogger.AS_ROOT_LOGGER.debugf(e, "failed to send started notification");
}
}
@Override
public void connectionOpened(final Connection connection) throws IOException {
final Channel channel = openChannel(connection, SERVER_CHANNEL_TYPE, configuration.getOptionMap());
if(setChannel(channel)) {
channel.receiveMessage(channelHandler.getReceiver());
channel.addCloseHandler(channelHandler);
} else {
channel.closeAsync();
}
}
@Override
public void close() throws IOException {
try {
connectionManager.shutdown();
} finally {
super.close();
}
}
/**
* The server registration request.
*/
private class ServerRegisterRequest extends AbstractManagementRequest<ModelNode, Void> {
@Override
public byte getOperationType() {
return DomainServerProtocol.REGISTER_REQUEST;
}
@Override
protected void sendRequest(final ActiveOperation.ResultHandler<ModelNode> resultHandler, final ManagementRequestContext<Void> context, final FlushableDataOutput output) throws IOException {
// output.write(DomainServerProtocol.PARAM_SERVER_NAME);
output.writeUTF(serverProcessName);
}
@Override
public void handleRequest(DataInput input, ActiveOperation.ResultHandler<ModelNode> resultHandler, ManagementRequestContext<Void> voidManagementRequestContext) throws IOException {
final byte param = input.readByte();
if(param == DomainServerProtocol.PARAM_OK) {
final ModelNode operations = new ModelNode();
operations.readExternal(input);
resultHandler.done(operations);
} else {
resultHandler.failed(new IOException());
}
}
}
/**
* The server reconnect request. Additionally to registering the server at the HC, the response will
* contain whether this server is still in sync or needs to be restarted.
*/
public class ServerReconnectRequest extends AbstractManagementRequest<Boolean, Void> {
@Override
public byte getOperationType() {
return DomainServerProtocol.SERVER_RECONNECT_REQUEST;
}
@Override
protected void sendRequest(final ActiveOperation.ResultHandler<Boolean> resultHandler, final ManagementRequestContext<Void> context, final FlushableDataOutput output) throws IOException {
output.write(DomainServerProtocol.PARAM_SERVER_NAME);
output.writeUTF(serverProcessName);
}
@Override
public void handleRequest(final DataInput input, final ActiveOperation.ResultHandler<Boolean> resultHandler, final ManagementRequestContext<Void> context) throws IOException {
final byte param = input.readByte();
context.executeAsync(new ManagementRequestContext.AsyncTask<Void>() {
@Override
public void execute(ManagementRequestContext<Void> voidManagementRequestContext) throws Exception {
if(param == DomainServerProtocol.PARAM_OK) {
// Still in sync with the HC
resultHandler.done(Boolean.TRUE);
} else {
// Out of sync, set restart-required
resultHandler.done(Boolean.FALSE);
}
}
});
}
}
public class ServerStartedRequest extends AbstractManagementRequest<Void, Void> {
private final String message = ""; // started / failed message
@Override
public byte getOperationType() {
return DomainServerProtocol.SERVER_STARTED_REQUEST;
}
@Override
protected void sendRequest(ActiveOperation.ResultHandler<Void> resultHandler, ManagementRequestContext<Void> voidManagementRequestContext, FlushableDataOutput output) throws IOException {
output.write(DomainServerProtocol.PARAM_OK); // TODO handle server start failed message
output.writeUTF(message);
resultHandler.done(null);
}
@Override
public void handleRequest(DataInput input, ActiveOperation.ResultHandler<Void> resultHandler, ManagementRequestContext<Void> voidManagementRequestContext) throws IOException {
//
}
}
private class ReconnectTask implements ProtocolConnectionManager.ConnectTask {
@Override
public Connection connect() throws IOException {
// Reconnect with a potentially new configuration
return ProtocolConnectionUtils.connectSync(configuration);
}
@Override
public ProtocolConnectionManager.ConnectionOpenHandler getConnectionOpenedHandler() {
return HostControllerConnection.this;
}
@Override
public ProtocolConnectionManager.ConnectTask connectionClosed() {
return this;
}
@Override
public void shutdown() {
//
}
}
/**
* Create the client callback handler.
*
* @param userName the username
* @param authKey the authentication key
* @return the callback handler
*/
static CallbackHandler createClientCallbackHandler(final String userName, final byte[] authKey) {
return new ClientCallbackHandler(userName, authKey);
}
private static class ClientCallbackHandler implements CallbackHandler {
private final String userName;
private final byte[] authKey;
private ClientCallbackHandler(String userName, byte[] authKey) {
this.userName = userName;
this.authKey = authKey;
}
public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
for (Callback current : callbacks) {
if (current instanceof RealmCallback) {
RealmCallback rcb = (RealmCallback) current;
String defaultText = rcb.getDefaultText();
rcb.setText(defaultText); // For now just use the realm suggested.
} else if (current instanceof RealmChoiceCallback) {
throw new UnsupportedCallbackException(current, "Realm choice not currently supported.");
} else if (current instanceof NameCallback) {
NameCallback ncb = (NameCallback) current;
ncb.setName(userName);
} else if (current instanceof PasswordCallback) {
PasswordCallback pcb = (PasswordCallback) current;
pcb.setPassword(new String(authKey, UTF_8).toCharArray());
} else {
throw new UnsupportedCallbackException(current);
}
}
}
}
}