scouter.xtra.tools.JVM Maven / Gradle / Ivy
/*
* Copyright 2015 the original author or authors.
* @https://github.com/scouter-project/scouter
*
* 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 scouter.xtra.tools;
import java.io.IOException;
import java.util.Properties;
import com.sun.tools.attach.AttachNotSupportedException;
import com.sun.tools.attach.VirtualMachine;
public class JVM {
public JVM(String pid) {
this.pid = pid;
}
private String pid;
private VirtualMachine vm = null;
private String desc;
public boolean isConnected() {
return vm != null;
}
public String getPid() {
return pid;
}
public boolean connect() throws AttachNotSupportedException, IOException {
this.vm = VirtualMachine.attach(pid);
this.desc = vm.getSystemProperties().getProperty("sun.java.command");
return true;
}
public void close() {
if (this.vm != null) {
try {
this.vm.detach();
} catch (Exception e) {
e.printStackTrace();
}
}
this.pid = null;
this.vm = null;
}
public Properties getSystemProperties() throws IOException {
if (vm == null)
throw new RuntimeException("Not connected to jvm");
return vm.getSystemProperties();
}
public VirtualMachine getVM() {
return vm;
}
public String getDesc() {
return this.desc;
}
}