MBeanServerConnectionProvider.java

/*
 * Copyright 2015 Red Hat, Inc.
 *
 * 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.as.arquillian.container;

import java.io.Closeable;
import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;

import javax.management.MBeanServerConnection;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXServiceURL;

import org.jboss.logging.Logger;
import org.xnio.IoUtils;

/**
 * A provider for the JSR160 connection.
 *
 * @author Thomas.Diesler@jboss.com
 * @since 03-Dec-2010
 */
public final class MBeanServerConnectionProvider implements Closeable {

    private static final Logger log = Logger.getLogger(MBeanServerConnectionProvider.class);
    private final InetAddress hostAddr;
    private final int port;

    private JMXConnector jmxConnector;

    public static MBeanServerConnectionProvider defaultProvider() throws UnknownHostException {
        return new MBeanServerConnectionProvider(InetAddress.getByName("127.0.0.1"), 9990);
    }

    public MBeanServerConnectionProvider(InetAddress hostAddr, int port) {
        this.hostAddr = hostAddr;
        this.port = port;
    }

    public MBeanServerConnection getConnection() {
        String host = hostAddr.getHostAddress();
        String urlString = System.getProperty("jmx.service.url", "service:jmx:remote+http://" + NetworkUtils.formatPossibleIpv6Address(host) + ":" + port);
        try {
            if (jmxConnector == null) {
                log.debug("Connecting JMXConnector to: " + urlString);
                JMXServiceURL serviceURL = new JMXServiceURL(urlString);
                jmxConnector = JMXConnectorFactory.connect(serviceURL, null);
            }
            return jmxConnector.getMBeanServerConnection();
        } catch (IOException ex) {
            throw new IllegalStateException("Cannot obtain MBeanServerConnection to: " + urlString, ex);
        }
    }

    public MBeanServerConnection getConnection(long timeout) {
        while (timeout > 0) {
            try {
                return getConnection();
            } catch (Exception ex) {
                // ignore
            }
            try {
                Thread.sleep(100);
                timeout -= 100;
            } catch (InterruptedException ex) {
                // ignore
            }
        }
        throw new IllegalStateException("MBeanServerConnection not available");
    }

    @Override
    public void close() throws IOException {
        IoUtils.safeClose(jmxConnector);
    }
}