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    • org.jboss.remoting3.spi.SpiUtils Maven / Gradle / Ivy

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    This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging 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: 35.0.0.Beta1
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    /*
 * JBoss, Home of Professional Open Source
 * Copyright 2010, JBoss Inc., and individual contributors as indicated
 * by the @authors tag. See the copyright.txt 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.remoting3.spi;

import java.io.Closeable;
import java.io.IOException;
import java.util.Arrays;
import org.jboss.remoting3.Channel;
import org.jboss.remoting3.CloseHandler;
import org.jboss.remoting3.HandleableCloseable;
import org.jboss.remoting3.OpenListener;
import org.xnio.IoUtils;
import org.jboss.logging.Logger;

/**
 * Utility methods for Remoting service providers.
 */
public final class SpiUtils {

    private SpiUtils() {}

    private static final Logger heLog = Logger.getLogger("org.jboss.remoting.handler-errors");

    /**
     * Safely handle a close notification.
     *
     * @param handler the close handler
     * @param closed the object that was closed
     * @param exception the close exception, or {@code null} if the close succeeded
     * @param  the type of the closed resource
     */
    public static  void safeHandleClose(final CloseHandler handler, final T closed, final IOException exception) {
        try {
            if (handler != null && closed != null) handler.handleClose(closed, exception);
        } catch (Throwable t) {
            heLog.error("Close handler threw an exception", t);
        }
    }

    /**
     * A close handler which closes another resource.
     *
     * @param c the resource to close
     * @return the close handler
     */
    public static CloseHandler closingCloseHandler(final Closeable c) {
        return new CloseHandler() {
            public void handleClose(final Object closed, final IOException exception) {
                IoUtils.safeClose(c);
            }
        };
    }

    /**
     * A close handler which closes another resource asynchronously.
     *
     * @param c the resource to close
     * @return the close handler
     */
    public static CloseHandler asyncClosingCloseHandler(final HandleableCloseable c) {
        return new CloseHandler() {
            public void handleClose(final Object closed, final IOException exception) {
                c.closeAsync();
            }
        };
    }

    /**
     * Glue two stack traces together.
     *
     * @param exception the exception which occurred in another thread
     * @param userStackTrace the stack trace of the current thread from {@link Thread#getStackTrace()}
     * @param trimCount the number of frames to trim
     * @param msg the message to use
     */
    public static void glueStackTraces(final Throwable exception, final StackTraceElement[] userStackTrace, final int trimCount, final String msg) {
        final StackTraceElement[] est = exception.getStackTrace();
        final StackTraceElement[] fst = Arrays.copyOf(est, est.length + userStackTrace.length - trimCount + 1);
        fst[est.length] = new StackTraceElement("..." + msg + "..", "", null, -1);
        System.arraycopy(userStackTrace, trimCount, fst, est.length + 1, userStackTrace.length - trimCount);
        exception.setStackTrace(fst);
    }

    /**
     * Get an executor task for opening a service.
     *
     * @param newChannel the new service channel
     * @param listener the service open listener
     * @return the runnable task
     */
    public static Runnable getServiceOpenTask(final Channel newChannel, final OpenListener listener) {
        return new ServiceOpenTask(listener, newChannel);
    }

    static class ServiceOpenTask implements Runnable {

        private final OpenListener listener;
        private final Channel newChannel;

        public ServiceOpenTask(final OpenListener listener, final Channel newChannel) {
            this.listener = listener;
            this.newChannel = newChannel;
        }

        public void run() {
            listener.channelOpened(newChannel);
        }
    }
}
    
    
    
    

    




    
    
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