1 /*
   2  * Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package jdk.jfr.internal;
  27 
  28 import java.util.function.Supplier;
  29 
  30 /**
  31  * JFR logger
  32  *
  33  */
  34 
  35 public final class Logger {
  36 
  37     private final static int MAX_SIZE = 10000;
  38 
  39     public static void log(LogTag logTag, LogLevel logLevel, String message) {
  40         if (logTag.shouldLog(logLevel.level)) {
  41             logInternal(logTag, logLevel, message);
  42         }
  43     }
  44 
  45     public static void log(LogTag logTag, LogLevel logLevel, Supplier<String> messageSupplier) {
  46         if (logTag.shouldLog(logLevel.level)) {
  47             logInternal(logTag, logLevel, messageSupplier.get());
  48         }
  49     }
  50 
  51     private static void logInternal(LogTag logTag, LogLevel logLevel, String message) {
  52         if (message == null || message.length() < MAX_SIZE) {
  53             JVM.log(logTag.id, logLevel.level, message);
  54         } else {
  55             JVM.log(logTag.id, logLevel.level, message.substring(0, MAX_SIZE));
  56         }
  57     }
  58 }