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/*-
* ============LICENSE_START=======================================================
* Integrity Monitor
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
/**
*
*/
package org.onap.policy.common.im.jmx;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import javax.management.MBeanServerConnection;
import javax.management.Notification;
import javax.management.NotificationListener;
import javax.management.remote.JMXConnectionNotification;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXServiceURL;
/**
* Class to create a JMX RMI connection to the JmxAgent.
*/
public final class JmxAgentConnection {
private static final String DEFAULT_HOST = "localhost";
private static final String DEFAULT_PORT = "9996";
private String host;
private String port;
private JMXConnector connector;
private String jmxUrl = null;
/**
* Set up the host/port from the properties. Use defaults if missing from the properties.
* @param properties the properties used to look for host and port
*/
public JmxAgentConnection() {
host = DEFAULT_HOST;
port = DEFAULT_PORT;
}
public JmxAgentConnection(String url) {
jmxUrl = url;
}
/**
* Generate jmxAgent url.
* service:jmx:rmi:///jndi/rmi://host.domain:9999/jmxAgent
*
* @param host
* host.domain
* @param port
* 9999
* @return jmxAgent url.
*/
private static String jmxAgentUrl(String host, String port) {
String url = "service:jmx:rmi:///jndi/rmi://" + host + ":" + port
+ "/jmxrmi";
return url;
}
/**
* Get a connection to the jmxAgent MBeanServer.
* @return the connection
* @throws Exception on error
*/
public MBeanServerConnection getMBeanConnection() throws Exception {
JMXServiceURL url;
if (jmxUrl == null) {
url = new JMXServiceURL(jmxAgentUrl(host, port));
}
else {
url = new JMXServiceURL(jmxUrl);
}
Map<String, Object> env = new HashMap<>();
connector = JMXConnectorFactory.newJMXConnector(url, env);
connector.connect();
connector.addConnectionNotificationListener(
new NotificationListener() {
@Override
public void handleNotification(
Notification notification, Object handback) {
if (notification.getType().equals(
JMXConnectionNotification.FAILED)) {
// handle disconnect
disconnect();
}
}
}, null, null);
return connector.getMBeanServerConnection();
}
/**
* Disconnect.
*/
public void disconnect() {
if (connector != null) {
try { connector.close(); } catch (IOException e) { }
}
}
}
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