/* * 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.logging.*; import java.lang.reflect.Field; /** * Simple log message tracer class. This class * prints all log messages regardless of log Level. * Note that we read LogRecord's private "message" * field using "field()" and "objectValue()" built-ins. */ @BTrace public class LogTracer { private static Field msgField = Reflective.field("java.util.logging.LogRecord", "message"); @OnMethod( clazz="+java.util.logging.Logger", method="log" ) public static void onLog(@Self Logger self, LogRecord record) { println(Reflective.get(msgField, record)); } }