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/*
* JBoss, Home of Professional Open Source.
* Copyright 2016, 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.wildfly.naming.client.remote;
import static org.wildfly.naming.client.remote.ProtocolUtils.createMarshaller;
import static org.wildfly.naming.client.remote.ProtocolUtils.createUnmarshaller;
import static org.wildfly.naming.client.remote.ProtocolUtils.readId;
import static org.wildfly.naming.client.remote.ProtocolUtils.writeId;
import static org.xnio.IoUtils.safeClose;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import javax.management.RuntimeMBeanException;
import javax.naming.Binding;
import javax.naming.Context;
import javax.naming.Name;
import javax.naming.NameClassPair;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import org.jboss.marshalling.ContextClassResolver;
import org.jboss.marshalling.Marshaller;
import org.jboss.marshalling.MarshallingConfiguration;
import org.jboss.marshalling.Unmarshaller;
import org.jboss.remoting3.Channel;
import org.jboss.remoting3.MessageInputStream;
import org.jboss.remoting3.MessageOutputStream;
import org.jboss.remoting3.util.MessageTracker;
import org.wildfly.naming.client._private.Messages;
/**
* The server side of the remote naming transport protocol.
*
* @author Farah Juma
*/
final class RemoteServerTransport {
private final MarshallingConfiguration configuration;
private final Channel channel;
private final int version;
private final Context localContext;
private final MessageTracker messageTracker;
RemoteServerTransport(final Channel channel, final int version, final MessageTracker messageTracker, final Context localContext) {
this.channel = channel;
this.version = version;
this.messageTracker = messageTracker;
this.localContext = localContext;
this.configuration = new MarshallingConfiguration();
configuration.setVersion(version == 2 ? 4 : 2);
configuration.setClassResolver(new ContextClassResolver());
}
public void start() {
channel.receiveMessage(new Channel.Receiver() {
public void handleError(final Channel channel, final IOException error) {
safeClose(channel);
}
public void handleEnd(final Channel channel) {
safeClose(channel);
}
public void handleMessage(final Channel channel, final MessageInputStream message) {
try (MessageInputStream mis = message) {
final byte messageId = mis.readByte();
final int id = readId(mis, version);
try {
switch (messageId) {
case Protocol.CMD_LOOKUP:
handleLookup(mis, messageId, id, false);
break;
case Protocol.CMD_LOOKUP_LINK:
handleLookup(mis, messageId, id, true);
break;
case Protocol.CMD_BIND:
handleBind(mis, messageId, id, false);
break;
case Protocol.CMD_REBIND:
handleBind(mis, messageId, id, true);
break;
case Protocol.CMD_UNBIND:
handleUnbind(mis, messageId, id);
break;
case Protocol.CMD_RENAME:
handleRename(mis, messageId, id);
break;
case Protocol.CMD_DESTROY_SUBCTX:
handleDestroySubcontext(mis, messageId, id);
break;
case Protocol.CMD_CREATE_SUBCTX:
handleCreateSubcontext(mis, messageId, id);
break;
case Protocol.CMD_LIST:
handleList(mis, messageId, id);
break;
case Protocol.CMD_LIST_BINDINGS:
handleListBindings(mis, messageId, id);
break;
default:
throw Messages.log.unrecognizedMessageId();
}
} catch (Throwable t) {
if (id != 0x00) {
Exception response;
if (t instanceof IOException || t instanceof RuntimeMBeanException) {
response = (Exception) t;
} else {
response = new IOException("Internal server error.");
Messages.log.unexpectedError(t);
}
sendException(response, messageId, id);
} else {
Messages.log.nullCorrelationId(t);
}
}
} catch (Throwable t) {
Messages.log.unexpectedError(t);
} finally {
channel.receiveMessage(this);
}
}
});
}
void handleLookup(final MessageInputStream message, final int messageId, final int id, final boolean preserveLinks) throws IOException {
final Object result;
try (MessageInputStream mis = message) {
if (version == 1) {
try (Unmarshaller unmarshaller = createUnmarshaller(mis, configuration)) {
final int parameterType = unmarshaller.readUnsignedByte();
if (parameterType != Protocol.P_NAME) {
Messages.log.unexpectedParameterType(Protocol.P_NAME, parameterType);
}
final Name name = unmarshaller.readObject(Name.class);
if (preserveLinks) {
result = localContext.lookupLink(name);
} else {
result = localContext.lookup(name);
}
} catch (ClassNotFoundException e) {
throw new IOException(e);
}
} else {
mis.readInt(); // consume authId
final String name = mis.readUTF();
if (preserveLinks) {
result = localContext.lookupLink(name);
} else {
result = localContext.lookup(name);
}
}
} catch (NamingException e) {
writeExceptionResponse(e, messageId, id);
return;
}
writeSuccessResponse(messageId, id, result);
}
void handleBind(final MessageInputStream message, final int messageId, final int id, final boolean rebind) throws IOException {
try (MessageInputStream mis = message) {
if (version == 1) {
try (Unmarshaller unmarshaller = createUnmarshaller(mis, configuration)) {
int parameterType = unmarshaller.readUnsignedByte();
if (parameterType != Protocol.P_NAME) {
Messages.log.unexpectedParameterType(Protocol.P_NAME, parameterType);
}
final Name name = unmarshaller.readObject(Name.class);
parameterType = unmarshaller.readUnsignedByte();
if (parameterType != Protocol.P_OBJECT) {
Messages.log.unexpectedParameterType(Protocol.P_OBJECT, parameterType);
}
final Object object = unmarshaller.readObject();
if (rebind) {
localContext.rebind(name, object);
} else {
localContext.bind(name, object);
}
}
} else {
mis.readInt(); // consume authId
final String name = mis.readUTF();
try (Unmarshaller unmarshaller = createUnmarshaller(mis, configuration)) {
final Object object = unmarshaller.readObject();
if (rebind) {
localContext.rebind(name, object);
} else {
localContext.bind(name, object);
}
}
}
} catch (ClassNotFoundException e) {
throw new IOException(e);
} catch (NamingException e) {
writeExceptionResponse(e, messageId, id);
return;
}
writeSuccessResponse(messageId, id);
}
void handleUnbind(final MessageInputStream message, final int messageId, final int id) throws IOException {
try (MessageInputStream mis = message) {
if (version == 1) {
try (Unmarshaller unmarshaller = createUnmarshaller(mis, configuration)) {
final int parameterType = unmarshaller.readUnsignedByte();
if (parameterType != Protocol.P_NAME) {
Messages.log.unexpectedParameterType(Protocol.P_NAME, parameterType);
}
final Name name = unmarshaller.readObject(Name.class);
localContext.unbind(name);
} catch (ClassNotFoundException e) {
throw new IOException(e);
}
} else {
mis.readInt(); // consume authId
final String name = mis.readUTF();
localContext.unbind(name);
}
} catch (NamingException e) {
writeExceptionResponse(e, messageId, id);
return;
}
writeSuccessResponse(messageId, id);
}
void handleRename(final MessageInputStream message, final int messageId, final int id) throws IOException {
try (MessageInputStream mis = message) {
if (version == 1) {
try (Unmarshaller unmarshaller = createUnmarshaller(mis, configuration)) {
int parameterType = unmarshaller.readUnsignedByte();
if (parameterType != Protocol.P_NAME) {
Messages.log.unexpectedParameterType(Protocol.P_NAME, parameterType);
}
final Name oldName = unmarshaller.readObject(Name.class);
parameterType = unmarshaller.readUnsignedByte();
if (parameterType != Protocol.P_NAME) {
Messages.log.unexpectedParameterType(Protocol.P_NAME, parameterType);
}
final Name newName = unmarshaller.readObject(Name.class);
localContext.rename(oldName, newName);
} catch (ClassNotFoundException e) {
throw new IOException(e);
}
} else {
mis.readInt(); // consume authId
final String oldName = mis.readUTF();
final String newName = mis.readUTF();
localContext.rename(oldName, newName);
}
} catch (NamingException e) {
writeExceptionResponse(e, messageId, id);
return;
}
writeSuccessResponse(messageId, id);
}
void handleDestroySubcontext(final MessageInputStream message, final int messageId, final int id) throws IOException {
try (MessageInputStream mis = message) {
if (version == 1) {
try (Unmarshaller unmarshaller = createUnmarshaller(mis, configuration)) {
final int parameterType = unmarshaller.readUnsignedByte();
if (parameterType != Protocol.P_NAME) {
Messages.log.unexpectedParameterType(Protocol.P_NAME, parameterType);
}
final Name name = unmarshaller.readObject(Name.class);
localContext.destroySubcontext(name);
} catch (ClassNotFoundException e) {
throw new IOException(e);
}
} else {
mis.readInt(); // consume authId
final String name = mis.readUTF();
localContext.destroySubcontext(name);
}
} catch (NamingException e) {
writeExceptionResponse(e, messageId, id);
return;
}
writeSuccessResponse(messageId, id);
}
void handleCreateSubcontext(final MessageInputStream message, final int messageId, final int id) throws IOException {
final Object result;
try (MessageInputStream mis = message) {
if (version == 1) {
try (Unmarshaller unmarshaller = createUnmarshaller(mis, configuration)) {
final int parameterType = unmarshaller.readUnsignedByte();
if (parameterType != Protocol.P_NAME) {
Messages.log.unexpectedParameterType(Protocol.P_NAME, parameterType);
}
final Name name = unmarshaller.readObject(Name.class);
result = localContext.createSubcontext(name);
} catch (ClassNotFoundException e) {
throw new IOException(e);
}
} else {
mis.readInt(); // consume authId
final String name = mis.readUTF();
result = localContext.createSubcontext(name);
}
} catch (NamingException e) {
writeExceptionResponse(e, messageId, id);
return;
}
writeSuccessResponse(messageId, id, result);
}
void handleList(final MessageInputStream message, final int messageId, final int id) throws IOException {
final NamingEnumeration results;
final List resultList;
try (MessageInputStream mis = message) {
if (version == 1) {
try (Unmarshaller unmarshaller = createUnmarshaller(mis, configuration)) {
final int parameterType = unmarshaller.readUnsignedByte();
if (parameterType != Protocol.P_NAME) {
Messages.log.unexpectedParameterType(Protocol.P_NAME, parameterType);
}
final Name name = unmarshaller.readObject(Name.class);
results = localContext.list(name);
} catch (ClassNotFoundException e) {
throw new IOException(e);
}
} else {
mis.readInt(); // consume authId
final String name = mis.readUTF();
results = localContext.list(name);
}
resultList = new ArrayList<>();
while (results.hasMore()) {
resultList.add(results.next());
}
} catch (NamingException e) {
writeExceptionResponse(e, messageId, id);
return;
}
try (MessageOutputStream mos = messageTracker.openMessageUninterruptibly()) {
mos.writeByte(messageId);
writeId(mos, version, id);
mos.writeByte(Protocol.SUCCESS);
if (version == 1) {
mos.writeByte(Protocol.P_LIST);
mos.writeInt(resultList.size());
try (Marshaller marshaller = createMarshaller(mos, configuration)) {
for (NameClassPair nameClassPair : resultList) {
marshaller.writeObject(nameClassPair);
}
}
} else {
mos.writeInt(resultList.size());
for (NameClassPair nameClassPair : resultList) {
mos.writeUTF(nameClassPair.getName());
mos.writeUTF(nameClassPair.getClassName());
}
}
}
}
void handleListBindings(final MessageInputStream message, final int messageId, final int id) throws IOException {
final NamingEnumeration results;
final List resultList;
try (MessageInputStream mis = message) {
if (version == 1) {
try (Unmarshaller unmarshaller = createUnmarshaller(mis, configuration)) {
final int parameterType = unmarshaller.readUnsignedByte();
if (parameterType != Protocol.P_NAME) {
Messages.log.unexpectedParameterType(Protocol.P_NAME, parameterType);
}
final Name name = unmarshaller.readObject(Name.class);
results = localContext.listBindings(name);
} catch (ClassNotFoundException e) {
throw new IOException(e);
}
} else {
mis.readInt(); // consume authId
final String name = mis.readUTF();
results = localContext.listBindings(name);
}
resultList = new ArrayList<>();
while (results.hasMore()) {
resultList.add(results.next());
}
} catch (NamingException e) {
writeExceptionResponse(e, messageId, id);
return;
}
try (MessageOutputStream mos = messageTracker.openMessageUninterruptibly()) {
mos.writeByte(messageId);
writeId(mos, version, id);
mos.writeByte(Protocol.SUCCESS);
if (version == 1) {
mos.writeByte(Protocol.P_LIST);
}
mos.writeInt(resultList.size());
try (Marshaller marshaller = createMarshaller(mos, configuration)) {
for (Binding binding : resultList) {
if (binding.getObject() instanceof Context) {
marshaller.writeByte(Protocol.P_CONTEXT);
marshaller.writeUTF(binding.getName());
} else {
marshaller.writeByte(Protocol.P_BINDING);
marshaller.writeObject(binding);
}
}
}
}
}
private void writeSuccessResponse(final int messageId, final int id) throws IOException {
try (MessageOutputStream mos = messageTracker.openMessageUninterruptibly()) {
mos.writeByte(messageId);
writeId(mos, version, id);
mos.writeByte(Protocol.SUCCESS);
}
}
private void writeSuccessResponse(final int messageId, final int id, final Object result) throws IOException {
try (MessageOutputStream mos = messageTracker.openMessageUninterruptibly()) {
mos.writeByte(messageId);
writeId(mos, version, id);
mos.writeByte(Protocol.SUCCESS);
if (result instanceof Context) {
mos.writeByte(Protocol.P_CONTEXT);
} else {
mos.writeByte(Protocol.P_OBJECT);
try (Marshaller marshaller = createMarshaller(mos, configuration)) {
marshaller.writeObject(result);
}
}
}
}
private void writeExceptionResponse(final Exception e, final int messageId, final int id) throws IOException {
try (MessageOutputStream mos = messageTracker.openMessageUninterruptibly()) {
mos.writeByte(messageId);
writeId(mos, version, id);
mos.writeByte(Protocol.FAILURE);
mos.writeByte(Protocol.P_EXCEPTION);
try (Marshaller marshaller = createMarshaller(mos, configuration)) {
marshaller.writeObject(e);
}
}
}
private void sendException(final Exception e, final int messageId, final int id) {
try {
writeExceptionResponse(e, messageId, id);
} catch (IOException ioe) {
Messages.log.failedToSendExceptionResponse(ioe);
}
}
}
