325N/A/*
325N/A * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
325N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
325N/A *
325N/A * This code is free software; you can redistribute it and/or modify it
325N/A * under the terms of the GNU General Public License version 2 only, as
325N/A * published by the Free Software Foundation. Oracle designates this
325N/A * particular file as subject to the "Classpath" exception as provided
325N/A * by Oracle in the LICENSE file that accompanied this code.
325N/A *
325N/A * This code is distributed in the hope that it will be useful, but WITHOUT
325N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
325N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
325N/A * version 2 for more details (a copy is included in the LICENSE file that
325N/A * accompanied this code).
325N/A *
325N/A * You should have received a copy of the GNU General Public License version
325N/A * 2 along with this work; if not, write to the Free Software Foundation,
325N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
325N/A *
325N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
325N/A * or visit www.oracle.com if you need additional information or have any
325N/A * questions.
325N/A */
325N/A
325N/Apackage sun.management;
325N/A
325N/Aimport java.lang.management.MemoryUsage;
325N/Aimport java.util.Iterator;
325N/Aimport java.util.Map;
325N/Aimport java.util.HashMap;
325N/A
325N/A/**
325N/A * An abstract sensor.
325N/A *
325N/A * <p>
325N/A * A <tt>AbstractSensor</tt> object consists of two attributes:
325N/A * <ul>
325N/A * <li><tt>on</tt> is a boolean flag indicating if a sensor is
325N/A * triggered. This flag will be set or cleared by the
325N/A * component that owns the sensor.</li>
325N/A * <li><tt>count</tt> is the total number of times that a sensor
325N/A * has been triggered.</li>
325N/A * </ul>
325N/A *
325N/A * @author Mandy Chung
325N/A * @since 1.5
325N/A */
325N/A
325N/Apublic abstract class Sensor {
325N/A private Object lock;
325N/A private String name;
325N/A private long count;
325N/A private boolean on;
325N/A
325N/A /**
325N/A * Constructs a <tt>Sensor</tt> object.
325N/A *
325N/A * @param name The name of this sensor.
325N/A */
325N/A public Sensor(String name) {
325N/A this.name = name;
325N/A this.count = 0;
325N/A this.on = false;
325N/A this.lock = new Object();
325N/A }
325N/A
325N/A /**
325N/A * Returns the name of this sensor.
325N/A *
325N/A * @return the name of this sensor.
325N/A */
325N/A public String getName() {
325N/A return name;
325N/A }
325N/A
325N/A /**
325N/A * Returns the total number of times that this sensor has been triggered.
325N/A *
325N/A * @return the total number of times that this sensor has been triggered.
325N/A */
325N/A public long getCount() {
325N/A synchronized (lock) {
325N/A return count;
325N/A }
325N/A }
325N/A
325N/A /**
325N/A * Tests if this sensor is currently on.
325N/A *
325N/A * @return <tt>true</tt> if the sensor is currently on;
325N/A * <tt>false</tt> otherwise.
325N/A *
325N/A */
325N/A public boolean isOn() {
325N/A synchronized (lock) {
325N/A return on;
325N/A }
325N/A }
325N/A
325N/A /**
325N/A * Triggers this sensor. This method first sets this sensor on
325N/A * and increments its sensor count.
325N/A */
325N/A public void trigger() {
325N/A synchronized (lock) {
325N/A on = true;
325N/A count++;
325N/A }
325N/A triggerAction();
325N/A }
325N/A
325N/A /**
325N/A * Triggers this sensor. This method sets this sensor on
325N/A * and increments the count with the input <tt>increment</tt>.
325N/A */
325N/A public void trigger(int increment) {
325N/A synchronized (lock) {
325N/A on = true;
325N/A count += increment;
325N/A // Do something here...
325N/A }
325N/A triggerAction();
325N/A }
325N/A
325N/A /**
325N/A * Triggers this sensor piggybacking a memory usage object.
325N/A * This method sets this sensor on
325N/A * and increments the count with the input <tt>increment</tt>.
325N/A */
325N/A public void trigger(int increment, MemoryUsage usage) {
325N/A synchronized (lock) {
325N/A on = true;
325N/A count += increment;
325N/A // Do something here...
325N/A }
325N/A triggerAction(usage);
325N/A }
325N/A
325N/A /**
325N/A * Clears this sensor.
325N/A */
325N/A public void clear() {
325N/A synchronized (lock) {
325N/A on = false;
325N/A }
325N/A clearAction();
325N/A }
325N/A
325N/A
325N/A /**
325N/A * Clears this sensor
325N/A * and increments the count with the input <tt>increment</tt>.
325N/A */
325N/A public void clear(int increment) {
325N/A synchronized (lock) {
325N/A on = false;
325N/A count += increment;
325N/A }
325N/A clearAction();
325N/A }
325N/A
325N/A public String toString() {
325N/A return "Sensor - " + getName() +
325N/A (isOn() ? " on " : " off ") +
" count = " + getCount();
}
abstract void triggerAction();
abstract void triggerAction(MemoryUsage u);
abstract void clearAction();
}