org.jboss.ejb.protocol.remote.EJBSimpleTransactionControl Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
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/*
* JBoss, Home of Professional Open Source.
* Copyright 2017 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed 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 org.jboss.ejb.protocol.remote;
import java.io.IOException;
import jakarta.transaction.HeuristicMixedException;
import jakarta.transaction.HeuristicRollbackException;
import jakarta.transaction.RollbackException;
import jakarta.transaction.SystemException;
import org.jboss.ejb.client.UserTransactionID;
import org.jboss.marshalling.Marshalling;
import org.jboss.marshalling.Unmarshaller;
import org.jboss.remoting3.MessageInputStream;
import org.jboss.remoting3.MessageOutputStream;
import org.jboss.remoting3.util.BlockingInvocation;
import org.jboss.remoting3.util.InvocationTracker;
import org.wildfly.transaction.client._private.Log;
import org.wildfly.transaction.client.provider.remoting.SimpleIdResolver;
import org.wildfly.transaction.client.spi.SimpleTransactionControl;
/**
* @author David M. Lloyd
*/
class EJBSimpleTransactionControl implements SimpleTransactionControl {
private final EJBClientChannel channel;
private final UserTransactionID transactionID;
private final SimpleIdResolver simpleIdResolver;
EJBSimpleTransactionControl(final EJBClientChannel channel) {
this.channel = channel;
final UserTransactionID transactionID = channel.allocateUserTransactionID();
this.transactionID = transactionID;
simpleIdResolver = connection -> {
if (channel.getChannel().getConnection() != connection) {
throw Log.log.invalidTransactionConnection();
}
return transactionID.getId();
};
}
public void commit() throws RollbackException, HeuristicMixedException, HeuristicRollbackException, SecurityException, SystemException {
executeSimpleInvocation(Protocol.TXN_COMMIT_REQUEST, true);
}
public void rollback() throws SecurityException, SystemException {
executeSimpleInvocation(Protocol.TXN_ROLLBACK_REQUEST, false);
}
private void executeSimpleInvocation(int type, boolean withParam) throws SystemException {
final EJBClientChannel channel = this.channel;
final InvocationTracker invocationTracker = channel.getInvocationTracker();
final EJBTransactionOperations.PlainTransactionInvocation invocation = invocationTracker.addInvocation(EJBTransactionOperations.PlainTransactionInvocation::new);
try (MessageOutputStream os = invocationTracker.allocateMessage(invocation)) {
os.writeByte(type);
os.writeShort(invocation.getIndex());
final byte[] encoded = transactionID.getEncodedForm();
PackedInteger.writePackedInteger(os, encoded.length);
os.write(encoded);
if (withParam) {
os.writeBoolean(true);
}
} catch (IOException e) {
throw new SystemException();
}
try (BlockingInvocation.Response response = invocation.getResponse()) {
switch (response.getParameter()) {
case Protocol.TXN_RESPONSE: {
final MessageInputStream inputStream = response.getInputStream();
boolean flag = inputStream.readBoolean();
if (flag) {
// unrecognized parameter
throw new SystemException();
}
return;
}
case Protocol.APPLICATION_EXCEPTION: {
throw readAppException(channel, response);
}
default: {
throw new SystemException();
}
}
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
invocation.cancel();
throw new SystemException();
} catch (IOException e) {
throw new SystemException();
} finally {
invocationTracker.remove(invocation);
}
}
static SystemException readAppException(final EJBClientChannel channel, final BlockingInvocation.Response response) throws SystemException {
Exception e;
try (final Unmarshaller unmarshaller = channel.createUnmarshaller()) {
try (MessageInputStream inputStream = response.getInputStream()) {
unmarshaller.start(Marshalling.createByteInput(inputStream));
e = unmarshaller.readObject(Exception.class);
unmarshaller.finish();
// The version is probably < 3 else we would not be here
// drain off attachments so the server doesn't complain
while (inputStream.read() != -1) {
inputStream.skip(Long.MAX_VALUE);
}
}
} catch (IOException | ClassNotFoundException e1) {
throw new SystemException();
}
if (e == null) {
throw new SystemException();
}
try {
throw e;
} catch (RuntimeException | SystemException e1) {
throw e1;
} catch (Exception e1) {
final SystemException e2 = new SystemException();
e2.initCause(e1);
return e2;
}
}
public T getProviderInterface(final Class providerInterfaceType) {
if (providerInterfaceType.isAssignableFrom(SimpleIdResolver.class)) {
return providerInterfaceType.cast(simpleIdResolver);
}
return null;
}
}