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Protocol handler for communicating via JMX
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/*
 * JBoss, Home of Professional Open Source
 * Copyright 2009 Red Hat Inc. and/or its affiliates and other contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * 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.arquillian.protocol.jmx;

import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.management.MBeanServerConnection;
import javax.management.MBeanServerInvocationHandler;
import javax.management.Notification;
import javax.management.NotificationListener;
import javax.management.ObjectName;
import org.jboss.arquillian.container.test.spi.ContainerMethodExecutor;
import org.jboss.arquillian.container.test.spi.command.Command;
import org.jboss.arquillian.container.test.spi.command.CommandCallback;
import org.jboss.arquillian.test.spi.TestMethodExecutor;
import org.jboss.arquillian.test.spi.TestResult;
import org.jboss.arquillian.test.spi.TestResult.Status;

/**
 * JMXMethodExecutor
 *
 * @author [email protected]
 */
public class JMXMethodExecutor implements ContainerMethodExecutor {

    // Provide logging
    private static Logger log = Logger.getLogger(JMXMethodExecutor.class.getName());

    private final MBeanServerConnection mbeanServer;
    private final String objectName;
    private final CommandCallback callback;
    private final Map protocolProps;

    public JMXMethodExecutor(MBeanServerConnection mbeanServer, CommandCallback callback) {
        this(mbeanServer, callback, JMXTestRunnerMBean.OBJECT_NAME, null);
    }

    public JMXMethodExecutor(MBeanServerConnection mbeanServer, CommandCallback callback, String objectName,
        Map protocolProps) {
        this.mbeanServer = mbeanServer;
        this.callback = callback;
        this.objectName = objectName;
        this.protocolProps = protocolProps;
    }

    public TestResult invoke(TestMethodExecutor testMethodExecutor) {
        if (testMethodExecutor == null) {
            throw new IllegalArgumentException("TestMethodExecutor null");
        }

        String testClass = testMethodExecutor.getInstance().getClass().getName();
        String testMethod = testMethodExecutor.getMethodName();
        String testCanonicalName = testClass + "." + testMethod;

        NotificationListener commandListener = null;
        ObjectName objectName = null;
        TestResult result = null;
        try {
            objectName = new ObjectName(this.objectName);
            commandListener = new CallbackNotificationListener(objectName);
            mbeanServer.addNotificationListener(objectName, commandListener, null, null);

            JMXTestRunnerMBean testRunner = getMBeanProxy(objectName, JMXTestRunnerMBean.class);
            log.fine("Invoke " + testCanonicalName);
            result =
                Serializer.toObject(TestResult.class, testRunner.runTestMethod(testClass, testMethod, protocolProps));
        } catch (final Throwable th) {
            result = new TestResult(Status.FAILED);
            result.setThrowable(th);
        } finally {
            result.setEnd(System.currentTimeMillis());
            if (objectName != null && commandListener != null) {
                try {
                    mbeanServer.removeNotificationListener(objectName, commandListener);
                } catch (Throwable th) {
                    log.log(Level.SEVERE, "Cannot remove notification listener", th);
                }
            }
        }
        log.fine("Result: " + result);
        if (result.getStatus() == Status.FAILED) {
            log.log(Level.SEVERE, "Failed: " + testCanonicalName, result.getThrowable());
        }
        return result;
    }

    private  T getMBeanProxy(ObjectName name, Class interf) {
        return MBeanServerInvocationHandler.newProxyInstance(mbeanServer, name, interf, false);
    }

    private class CallbackNotificationListener implements NotificationListener {
        private ObjectName serviceName;

        public CallbackNotificationListener(ObjectName serviceName) {
            this.serviceName = serviceName;
        }

        @Override
        public void handleNotification(Notification notification, Object handback) {
            String eventMessage = notification.getMessage();
            Command command = Serializer.toObject(Command.class, (byte[]) notification.getUserData());
            callback.fired(command);

            try {
                mbeanServer.invoke(serviceName, "push", new Object[] {eventMessage, Serializer.toByteArray(command)},
                    new String[] {String.class.getName(),
                        byte[].class.getName()});
            } catch (Exception e) {
                throw new RuntimeException("Could not return command result for command " + command, e);
            }
        }
    }
}