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/*
* Copyright (c) 2008, 2015, 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 com.sun.btrace.samples;
import com.sun.btrace.annotations.*;
import static com.sun.btrace.BTraceUtils.*;
import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;
/**
* This sample collects histogram of javax.swing.JComponets
* created by traced app. The histogram is printed once
* every 4 seconds.
*/
@BTrace public class Histogram {
private static Map<String, AtomicInteger> histo = Collections.newHashMap();
@OnMethod(
clazz="javax.swing.JComponent",
method="<init>"
)
public static void onnewObject(@Self Object obj) {
String cn = Reflective.name(classOf(obj));
AtomicInteger ai = Collections.get(histo, cn);
if (ai == null) {
ai = Atomic.newAtomicInteger(1);
Collections.put(histo, cn, ai);
} else {
Atomic.incrementAndGet(ai);
}
}
@OnTimer(4000)
public static void print() {
if (Collections.size(histo) != 0) {
printNumberMap("Component Histogram", histo);
}
}
}