/*
 * Copyright 2008-2010 Sun Microsystems, Inc.  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.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

package com.sun.btrace.samples;

/*
 * This sample demonstrates simple preprocessor in BTrace. 
 * When you run this sample against a Java process, you have
 * to specify -I . option so that the preprocessor can find 
 * the "btracedefs.h" file:
 *
 *    btrace -I . <pid> ThreadBean.java
 *
 * Without -I option in command, BTrace skips preprocessor
 * invocation.
 */
#include "btracedefs.h"

BTRACE_IMPORT

/**
 * This sample demonstrates that you can expose a BTrace
 * class as a JMX MBean. After connecting BTrace to the
 * target application, connect VisualVM or jconsole or 
 * any other JMX client to the same application.
 */ 
BTRACE ThreadBean {

    // PROPERTY makes the count field to be exposed
    // as an attribute of this MBean.
    PROPERTY long count;

    @OnMethod(
        clazz="java.lang.Thread",
        method="start"
    ) 
    ACTION onnewThread(@Self Thread t) {
        count++;
    }

    @OnTimer(2000) 
    ACTION ontimer() {
        println(count);
    }
}