ProcessUtil.java

/*
 * *
 *  Copyright 2015 Yusuke Yamamoto
 *
 *  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 samurai.remotedump;

import sun.jvmstat.monitor.*;

import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;

public class ProcessUtil {
    public static List<VM> getVMs(String host) throws URISyntaxException, MonitorException {
        List<VM> vms = new ArrayList<>();
        HostIdentifier hi = new HostIdentifier(host);
        MonitoredHost mh = MonitoredHost.getMonitoredHost(hi);
        Set jvms = mh.activeVms();
        for (Object pidInteger : jvms) {
            try {
                int pid = (Integer) pidInteger;
                MonitoredVm mv = mh.getMonitoredVm(new VmIdentifier("//" + pid + "?mode=r"), 0);
                StringMonitor sm = (StringMonitor) mv.findByName("sun.rt.javaCommand");
                String fullCommandLine = "";
                if (sm != null) {
                    fullCommandLine = sm.stringValue();
                }
                vms.add(new VM(pid, fullCommandLine));
            }catch(MonitorException me){
                // target process is no longer available
            }
        }
        return Collections.unmodifiableList(vms);
    }

    public static void main(String... args) throws URISyntaxException, MonitorException {
        List<VM> vms = getVMs("localhost");
        vms.forEach(e -> System.out.println(String.format("%s %s", e.getPid(), e.getFqcn())));
    }

}