BaseLoggerFinder.java

/*
 * Copyright (c) 2015, 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.
 *
 * 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
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 */

import jdk.internal.logger.SimpleConsoleLogger;

import java.lang.System.Logger;
import java.lang.System.LoggerFinder;
import java.security.AccessController;
import java.security.PrivilegedAction;

public class BaseLoggerFinder extends LoggerFinder
        implements LoggerFinderLoaderTest.TestLoggerFinder {

    static final RuntimePermission LOGGERFINDER_PERMISSION =
            new RuntimePermission("loggerFinder");

    public BaseLoggerFinder() {
        if (fails.get()) {
            throw new RuntimeException("Simulate exception while loading provider");
        }
    }

    Logger createSimpleLogger(String name) {
        PrivilegedAction<Logger> pa = () -> SimpleConsoleLogger.makeSimpleLogger(name);
        return AccessController.doPrivileged(pa);
    }

    @Override
    public Logger getLogger(String name, Module caller) {
        SecurityManager sm = System.getSecurityManager();
        if (sm != null) {
            sm.checkPermission(LOGGERFINDER_PERMISSION);
        }
        PrivilegedAction<ClassLoader> pa = () -> caller.getClassLoader();
        ClassLoader callerLoader = AccessController.doPrivileged(pa);
        if (callerLoader == null) {
            return system.computeIfAbsent(name, (n) -> new LoggerImpl(n, createSimpleLogger(name)));
        } else {
            return user.computeIfAbsent(name, (n) -> new LoggerImpl(n, createSimpleLogger(name)));
        }
    }
}