| /* |
| * Copyright (c) 2016, 2018, 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 jdk.jfr.internal; |
| |
| import java.util.function.Supplier; |
| |
| /** |
| * JFR logger |
| * |
| */ |
| |
| public final class Logger { |
| |
| private final static int MAX_SIZE = 10000; |
| static { |
| // This will try to initialize the JVM logging system |
| JVMSupport.tryToInitializeJVM(); |
| } |
| |
| |
| public static void log(LogTag logTag, LogLevel logLevel, String message) { |
| if (shouldLog(logTag, logLevel)) { |
| logInternal(logTag, logLevel, message); |
| } |
| } |
| |
| public static void log(LogTag logTag, LogLevel logLevel, Supplier<String> messageSupplier) { |
| if (shouldLog(logTag, logLevel)) { |
| logInternal(logTag, logLevel, messageSupplier.get()); |
| } |
| } |
| |
| private static void logInternal(LogTag logTag, LogLevel logLevel, String message) { |
| if (message == null || message.length() < MAX_SIZE) { |
| JVM.log(logTag.id, logLevel.level, message); |
| } else { |
| JVM.log(logTag.id, logLevel.level, message.substring(0, MAX_SIZE)); |
| } |
| } |
| |
| public static boolean shouldLog(LogTag tag, LogLevel level) { |
| return level.level >= tag.tagSetLevel; |
| } |
| } |