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/*
* Copyright (c) 2004, 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.jvmstat.perfdata.monitor;
import sun.jvmstat.monitor.*;
import sun.management.counter.Variability;
import java.nio.ByteBuffer;
/**
* Class for monitoring a constant PerfData String instrument. The
* value associated with a constant string instrument is fixed at
* the string instrument's creation time. Its value and length never
* change.
*
* @author Brian Doherty
* @since 1.5
*/
public class PerfStringConstantMonitor extends PerfStringMonitor {
/**
* The cached value of the string instrument.
*/
String data;
/**
* Constructor to create a StringMonitor object for the constant string
* instrument object represented by the data in the given buffer.
*
* @param name the name of the instrumentation object
* @param supported support level indicator
* @param bb the buffer containing the string instrument data
*/
public PerfStringConstantMonitor(String name, boolean supported,
ByteBuffer bb) {
super(name, Variability.CONSTANT, supported, bb);
this.data = super.stringValue();
}
/**
* {@inheritDoc}
*/
public Object getValue() {
return data; // return the cached string
}
/**
* {@inheritDoc}
*/
public String stringValue() {
return data; // return the cached string
}
}
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