org.springframework.boot.devtools.tunnel.server.RemoteDebugPortProvider Maven / Gradle / Ivy
/*
* Copyright 2012-2016 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
*
* 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.springframework.boot.devtools.tunnel.server;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.boot.lang.UsesUnsafeJava;
/**
* {@link PortProvider} that provides the port being used by the Java remote debugging.
*
* @author Phillip Webb
* @author Andy Wilkinson
*/
public class RemoteDebugPortProvider implements PortProvider {
private static final String JDWP_ADDRESS_PROPERTY = "sun.jdwp.listenerAddress";
private static final Log logger = LogFactory.getLog(RemoteDebugPortProvider.class);
@Override
public int getPort() {
if (!isRemoteDebugRunning()) {
throw new RemoteDebugNotRunningException();
}
return getRemoteDebugPort();
}
public static boolean isRemoteDebugRunning() {
return getRemoteDebugPort() != -1;
}
@UsesUnsafeJava
@SuppressWarnings("restriction")
private static int getRemoteDebugPort() {
String property = sun.misc.VMSupport.getAgentProperties()
.getProperty(JDWP_ADDRESS_PROPERTY);
try {
if (property != null && property.contains(":")) {
return Integer.valueOf(property.split(":")[1]);
}
}
catch (Exception ex) {
logger.trace(
"Unable to get JDWP port from property value '" + property + "'");
}
return -1;
}
}