org.jboss.ejb.client.remoting.NoSuchEJBExceptionResponseHandler Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of wildfly-client-all

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).

There is a newer version: 32.0.0.Final

Show newest version

/*
 * 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.ejb.client.remoting;

import org.jboss.ejb.client.EJBReceiverInvocationContext;
import org.jboss.logging.Logger;

import javax.ejb.NoSuchEJBException;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 * Responsible for handling {@link NoSuchEJBException} response from a server and retrying that invocation
 * on a different node, if possible
 *
 * @author Jaikiran Pai
 */
class NoSuchEJBExceptionResponseHandler extends ProtocolMessageHandler {

    private static final Logger logger = Logger.getLogger(NoSuchEJBExceptionResponseHandler.class);

    private final ChannelAssociation channelAssociation;

    NoSuchEJBExceptionResponseHandler(final ChannelAssociation channelAssociation) {
        this.channelAssociation = channelAssociation;
    }

    /**
     * Process the passed MessageInputStream for the invocation failure
     *
     *
     * @param inputStream@throws java.io.IOException If there's a problem while reading the stream
     */
    @Override
    protected void processMessage(InputStream inputStream) throws IOException {
        final DataInputStream dataInputStream = new DataInputStream(inputStream);
        final NoSuchEJBException noSuchEJBException;
        final short invocationId;
        try {
            // read invocation id
            invocationId = dataInputStream.readShort();
            final String failureMessage = dataInputStream.readUTF();
            noSuchEJBException = new NoSuchEJBException(failureMessage);
        } finally {
            dataInputStream.close();
        }
        final EJBReceiverInvocationContext receiverInvocationContext = this.channelAssociation.getEJBReceiverInvocationContext(invocationId);
        if (receiverInvocationContext == null) {
            logger.info("Cannot retry invocation which failed with exception:", noSuchEJBException);
            // let the client know the result, since we can't retry without a receiver invocation context
            this.channelAssociation.resultReady(invocationId, new ResultProducer(noSuchEJBException));
            return;
        }
        // retry the invocation on a different node
        try {
            logger.info("Retrying invocation which failed on node " + receiverInvocationContext.getNodeName() + " with exception:", noSuchEJBException);
            receiverInvocationContext.retryInvocation(true);

            // EJBCLIENT-130: remove any stale invocationID associated with the failed invocation from
            // the ChannelAssociation map of waiting method invocations, if the retry is successful
            this.channelAssociation.cleanupStaleResponse(invocationId);
        } catch (Exception e) {
            // retry failed, let the waiting client know of this failure
            this.channelAssociation.resultReady(invocationId, new ResultProducer(e));
            return;
        }
    }

    /**
     * A ResultProducer which throws back {@link NoSuchEJBException}
     */
    private class ResultProducer implements EJBReceiverInvocationContext.ResultProducer {

        private final Exception exception;

        ResultProducer(final Exception exception) {
            this.exception = exception;
        }


        @Override
        public Object getResult() throws Exception {
            // glue the client side exception with the server side
            NoSuchEJBExceptionResponseHandler.this.glueStackTraces(this.exception, Thread.currentThread().getStackTrace(), 1, "asynchronous invocation");
            throw this.exception;
        }

        @Override
        public void discardResult() {
        }
    }
}