/* * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */package sun.management;import java.lang.management.MemoryUsage;import java.util.Iterator;import java.util.Map;import java.util.HashMap;/** * An abstract sensor. * * <p> * A <tt>AbstractSensor</tt> object consists of two attributes: * <ul> * <li><tt>on</tt> is a boolean flag indicating if a sensor is * triggered. This flag will be set or cleared by the * component that owns the sensor.</li> * <li><tt>count</tt> is the total number of times that a sensor * has been triggered.</li> * </ul> * * @author Mandy Chung * @since 1.5 */public abstract class Sensor { private Object lock; private String name; private long count; private boolean on; /** * Constructs a <tt>Sensor</tt> object. * * @param name The name of this sensor. */ public Sensor(String name) { this.name = name; this.count = 0; this.on = false; this.lock = new Object(); } /** * Returns the name of this sensor. * * @return the name of this sensor. */ public String getName() { return name; } /** * Returns the total number of times that this sensor has been triggered. * * @return the total number of times that this sensor has been triggered. */ public long getCount() { synchronized (lock) { return count; } } /** * Tests if this sensor is currently on. * * @return <tt>true</tt> if the sensor is currently on; * <tt>false</tt> otherwise. * */ public boolean isOn() { synchronized (lock) { return on; } } /** * Triggers this sensor. This method first sets this sensor on * and increments its sensor count. */ public void trigger() { synchronized (lock) { on = true; count++; } triggerAction(); } /** * Triggers this sensor. This method sets this sensor on * and increments the count with the input <tt>increment</tt>. */ public void trigger(int increment) { synchronized (lock) { on = true; count += increment; // Do something here... } triggerAction(); } /** * Triggers this sensor piggybacking a memory usage object. * This method sets this sensor on * and increments the count with the input <tt>increment</tt>. */ public void trigger(int increment, MemoryUsage usage) { synchronized (lock) { on = true; count += increment; // Do something here... } triggerAction(usage); } /** * Clears this sensor. */ public void clear() { synchronized (lock) { on = false; } clearAction(); } /** * Clears this sensor * and increments the count with the input <tt>increment</tt>. */ public void clear(int increment) { synchronized (lock) { on = false; count += increment; } clearAction(); } public String toString() { return "Sensor - " + getName() + (isOn() ? " on " : " off ") + " count = " + getCount(); } abstract void triggerAction(); abstract void triggerAction(MemoryUsage u); abstract void clearAction();}
/*
* Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.management;
import java.lang.management.MemoryUsage;
import java.util.Iterator;
import java.util.Map;
import java.util.HashMap;
/**
* An abstract sensor.
*
* <p>
* A <tt>AbstractSensor</tt> object consists of two attributes:
* <ul>
* <li><tt>on</tt> is a boolean flag indicating if a sensor is
* triggered. This flag will be set or cleared by the
* component that owns the sensor.</li>
* <li><tt>count</tt> is the total number of times that a sensor
* has been triggered.</li>
* </ul>
*
* @author Mandy Chung
* @since 1.5
*/
public abstract class Sensor {
private Object lock;
private String name;
private long count;
private boolean on;
/**
* Constructs a <tt>Sensor</tt> object.
*
* @param name The name of this sensor.
*/
public Sensor(String name) {
this.name = name;
this.count = 0;
this.on = false;
this.lock = new Object();
}
/**
* Returns the name of this sensor.
*
* @return the name of this sensor.
*/
public String getName() {
return name;
}
/**
* Returns the total number of times that this sensor has been triggered.
*
* @return the total number of times that this sensor has been triggered.
*/
public long getCount() {
synchronized (lock) {
return count;
}
}
/**
* Tests if this sensor is currently on.
*
* @return <tt>true</tt> if the sensor is currently on;
* <tt>false</tt> otherwise.
*
*/
public boolean isOn() {
synchronized (lock) {
return on;
}
}
/**
* Triggers this sensor. This method first sets this sensor on
* and increments its sensor count.
*/
public void trigger() {
synchronized (lock) {
on = true;
count++;
}
triggerAction();
}
/**
* Triggers this sensor. This method sets this sensor on
* and increments the count with the input <tt>increment</tt>.
*/
public void trigger(int increment) {
synchronized (lock) {
on = true;
count += increment;
// Do something here...
}
triggerAction();
}
/**
* Triggers this sensor piggybacking a memory usage object.
* This method sets this sensor on
* and increments the count with the input <tt>increment</tt>.
*/
public void trigger(int increment, MemoryUsage usage) {
synchronized (lock) {
on = true;
count += increment;
// Do something here...
}
triggerAction(usage);
}
/**
* Clears this sensor.
*/
public void clear() {
synchronized (lock) {
on = false;
}
clearAction();
}
/**
* Clears this sensor
* and increments the count with the input <tt>increment</tt>.
*/
public void clear(int increment) {
synchronized (lock) {
on = false;
count += increment;
}
clearAction();
}
public String toString() {
return "Sensor - " + getName() +
(isOn() ? " on " : " off ") +
" count = " + getCount();
}
abstract void triggerAction();
abstract void triggerAction(MemoryUsage u);
abstract void clearAction();
}