/*
 * Copyright (C) 2003-2007 eXo Platform SAS.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see<http://www.gnu.org/licenses/>.
 */
package org.exoplatform.container.monitor.jvm;

import java.lang.management.ManagementFactory;
import java.lang.management.RuntimeMXBean;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.picocontainer.Startable;

import org.exoplatform.commons.utils.ExoProperties;
import org.exoplatform.container.xml.InitParams;
import org.exoplatform.container.xml.PropertiesParam;

/**
 * @author Tuan Nguyen (tuan08@users.sourceforge.net)
 * @since Nov 8, 2004
 * @version $Id: JVMRuntimeInfoImpl.java 5799 2006-05-28 17:55:42Z geaz $
 */
public class JVMRuntimeInfoImpl implements JVMRuntimeInfo, Startable {
  private RuntimeMXBean mxbean_;

  public JVMRuntimeInfoImpl(InitParams params) throws Exception {
    mxbean_ = ManagementFactory.getRuntimeMXBean();

    PropertiesParam param = params.getPropertiesParam("add.system.properties");
    if (param != null) {
      ExoProperties props = param.getProperties();
      Iterator i = props.entrySet().iterator();
      while (i.hasNext()) {
        Map.Entry entry = (Map.Entry) i.next();
        System.setProperty((String) entry.getKey(), (String) entry.getValue());
      }
    }
  }

  public String getName() {
    return mxbean_.getName();
  }

  public String getSpecName() {
    return mxbean_.getSpecName();
  }

  public String getSpecVendor() {
    return mxbean_.getSpecVendor();
  }

  public String getSpecVersion() {
    return mxbean_.getSpecVersion();
  }

  public String getManagementSpecVersion() {
    return mxbean_.getManagementSpecVersion();
  }

  public String getVmName() {
    return mxbean_.getVmName();
  }

  public String getVmVendor() {
    return mxbean_.getVmVendor();
  }

  public String getVmVersion() {
    return mxbean_.getVmVersion();
  }

  public List getInputArguments() {
    return mxbean_.getInputArguments();
  }

  public Map getSystemProperties() {
    return mxbean_.getSystemProperties();
  }

  public boolean getBootClassPathSupported() {
    return mxbean_.isBootClassPathSupported();
  }

  public String getBootClassPath() {
    return mxbean_.getBootClassPath();
  }

  public String getClassPath() {
    return mxbean_.getClassPath();
  }

  public String getLibraryPath() {
    return mxbean_.getLibraryPath();
  }

  public long getStartTime() {
    return mxbean_.getStartTime();
  }

  public long getUptime() {
    return mxbean_.getUptime();
  }

  public boolean isManagementSupported() {
    return true;
  }

  public String getSystemPropertiesAsText() {
    StringBuffer b = new StringBuffer();
    Iterator i = System.getProperties().entrySet().iterator();
    while (i.hasNext()) {
      Map.Entry entry = (Map.Entry) i.next();
      b.append(entry.getKey()).append("=").append(entry.getValue()).append("\n");
    }
    return b.toString();
  }

  public void start() {
  }

  public void stop() {
  }

  public String toString() {
    StringBuilder b = new StringBuilder();
    b.append("Name: ").append(getName()).append("\n");
    b.append("Specification Name: ").append(getSpecName()).append("\n");
    b.append("Specification Vendor: ").append(getSpecVendor()).append("\n");
    b.append("Specification Version: ").append(getSpecVersion()).append("\n");
    b.append("Management Spec Version: ").append(getManagementSpecVersion()).append("\n\n");

    b.append("Virtual Machine Name: ").append(getVmName()).append("\n");
    b.append("Virtual Machine Vendor: ").append(getVmVendor()).append("\n");
    b.append("Virtual Machine Version: ").append(getVmVersion()).append("\n\n");

    b.append("Input Arguments: ").append(getInputArguments()).append("\n");
    b.append("System Properties: ").append(getSystemProperties()).append("\n\n");

    b.append("Boot Class Path Support: ").append(getBootClassPathSupported()).append("\n");
    b.append("Boot Class Path: ").append(getBootClassPath()).append("\n");
    b.append("Class Path: ").append(getClassPath()).append("\n");
    b.append("Library Path: ").append(getLibraryPath()).append("\n\n");

    b.append("Start Time: ").append(new Date(getStartTime())).append("\n");
    b.append("Up Time: ").append(getUptime() / (1000 * 60)).append("min\n");
    return b.toString();
  }
}