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/*
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* Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package jdk.jfr.internal;
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import java.util.function.Supplier;
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/**
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* JFR logger
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*
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*/
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public final class Logger {
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private final static int MAX_SIZE = 10000;
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static {
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// This will try to initialize the JVM logging system
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JVMSupport.tryToInitializeJVM();
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}
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public static void log(LogTag logTag, LogLevel logLevel, String message) {
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if (shouldLog(logTag, logLevel)) {
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logInternal(logTag, logLevel, message);
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}
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}
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public static void log(LogTag logTag, LogLevel logLevel, Supplier<String> messageSupplier) {
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if (shouldLog(logTag, logLevel)) {
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logInternal(logTag, logLevel, messageSupplier.get());
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}
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}
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private static void logInternal(LogTag logTag, LogLevel logLevel, String message) {
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if (message == null || message.length() < MAX_SIZE) {
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JVM.log(logTag.id, logLevel.level, message);
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} else {
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JVM.log(logTag.id, logLevel.level, message.substring(0, MAX_SIZE));
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}
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}
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public static boolean shouldLog(LogTag tag, LogLevel level) {
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return level.level >= tag.tagSetLevel;
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}
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}
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