/*

 * 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) {

        // Logging level is not initialized because of lack of Xlog support in jdk8,

        // so this method returns true directly now.

        return true; // TODO: level.level >= tag.tagSetLevel;

    }

}