spring ConnectorDelegate 源码
spring ConnectorDelegate 代码
文件路径：/spring-context/src/main/java/org/springframework/jmx/access/ConnectorDelegate.java
/*
* Copyright 2002-2017 the original author or authors.
*
* 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
*
* https://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.springframework.jmx.access;
import java.io.IOException;
import java.util.Map;
import javax.management.MBeanServerConnection;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXServiceURL;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.jmx.MBeanServerNotFoundException;
import org.springframework.jmx.support.JmxUtils;
import org.springframework.lang.Nullable;
/**
* Internal helper class for managing a JMX connector.
*
* @author Juergen Hoeller
* @since 2.5.2
*/
class ConnectorDelegate {
private static final Log logger = LogFactory.getLog(ConnectorDelegate.class);
@Nullable
private JMXConnector connector;
/**
* Connects to the remote {@code MBeanServer} using the configured {@code JMXServiceURL}:
* to the specified JMX service, or to a local MBeanServer if no service URL specified.
* @param serviceUrl the JMX service URL to connect to (may be {@code null})
* @param environment the JMX environment for the connector (may be {@code null})
* @param agentId the local JMX MBeanServer's agent id (may be {@code null})
*/
public MBeanServerConnection connect(@Nullable JMXServiceURL serviceUrl, @Nullable Map<String, ?> environment, @Nullable String agentId)
throws MBeanServerNotFoundException {
if (serviceUrl != null) {
if (logger.isDebugEnabled()) {
logger.debug("Connecting to remote MBeanServer at URL [" + serviceUrl + "]");
}
try {
this.connector = JMXConnectorFactory.connect(serviceUrl, environment);
return this.connector.getMBeanServerConnection();
}
catch (IOException ex) {
throw new MBeanServerNotFoundException("Could not connect to remote MBeanServer [" + serviceUrl + "]", ex);
}
}
else {
logger.debug("Attempting to locate local MBeanServer");
return JmxUtils.locateMBeanServer(agentId);
}
}
/**
* Closes any {@code JMXConnector} that may be managed by this interceptor.
*/
public void close() {
if (this.connector != null) {
try {
this.connector.close();
}
catch (IOException ex) {
logger.debug("Could not close JMX connector", ex);
}
}
}
}
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