--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/util/logging/SimpleLogManager.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2013, 2016, 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
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import java.util.*;
+import java.util.logging.*;
+import sun.util.logging.PlatformLogger;
+
+/*
+ * @test
+ * @bug 8005615
+ * @summary A LogManager subclass overrides its own implementation of named
+ *          logger (see the subclassing information in the Logger class specification)
+ *
+ * @modules java.base/sun.util.logging
+ *          java.logging
+ * @compile -XDignore.symbol.file CustomLogManager.java SimpleLogManager.java
+ * @run main/othervm -Djava.util.logging.manager=SimpleLogManager SimpleLogManager
+ */
+public class SimpleLogManager extends CustomLogManager {
+    public static void main(String[] args) {
+        String classname = System.getProperty("java.util.logging.manager");
+        if (!classname.equals("SimpleLogManager")) {
+            throw new RuntimeException("java.util.logging.manager not set");
+        }
+
+        Logger logger = Logger.getLogger(SimpleLogManager.class.getName());
+        Logger.getLogger("org.foo.bar.Foo");
+
+        // a platform logger used by the system code is just a Logger instance.
+        PlatformLogger.getLogger("org.openjdk.core.logger");
+
+        LogManager mgr = LogManager.getLogManager();
+        if (mgr != CustomLogManager.INSTANCE || !(mgr instanceof SimpleLogManager)) {
+             throw new RuntimeException(LogManager.getLogManager() + " not SimpleLogManager");
+        }
+
+        checkCustomLogger(SimpleLogManager.class.getName(), null);
+        checkCustomLogger("org.foo.bar.Foo", null);
+        checkCustomLogger("org.openjdk.core.logger", "sun.util.logging.resources.logging");
+
+        // ## The LogManager.demandLogger method does not handle custom log manager
+        // ## that overrides the getLogger method to return a custom logger
+        // ## (see the test case in 8005640).  Logger.getLogger may return
+        // ## a Logger instance but LogManager overrides it with a custom Logger
+        // ## instance like this case.
+        //
+        // However, the specification of LogManager and Logger subclassing is
+        // not clear whether this is supported or not.  The following check
+        // just captures the current behavior.
+        if (logger instanceof CustomLogger) {
+            throw new RuntimeException(logger + " not CustomLogger");
+        }
+    }
+
+    private static void checkCustomLogger(String name, String resourceBundleName) {
+        CustomLogManager.checkLogger(name, resourceBundleName);
+        Logger logger1 = Logger.getLogger(name);
+        Logger logger2 = LogManager.getLogManager().getLogger(name);
+        if (logger1 != logger2) {
+            throw new RuntimeException(logger1 + " != " + logger2);
+        }
+        if (!(logger1 instanceof CustomLogger)) {
+            throw new RuntimeException(logger1 + " not CustomLogger");
+        }
+    }
+
+    /*
+     * This SimpleLogManager overrides the addLogger method to replace
+     * the given logger with a custom logger.
+     *
+     * It's unclear what the recommended way to use custom logger is.
+     * A LogManager subclass might override the getLogger method to return
+     * a custom Logger and create a new custom logger if not exist so that
+     * Logger.getLogger() can return a custom Logger instance but that violates
+     * the LogManager.getLogger() spec which should return null if not found.
+     */
+    public synchronized boolean addLogger(Logger logger) {
+        String name = logger.getName();
+        if (namedLoggers.containsKey(name)) {
+            return false;
+        }
+        CustomLogger newLogger = new CustomLogger(logger);
+        return super.addLogger(newLogger);
+    }
+
+    public class CustomLogger extends Logger {
+        final Logger keepRef; // keep a strong reference to avoid GC.
+        CustomLogger(Logger logger) {
+            super(logger.getName(), logger.getResourceBundleName());
+            keepRef = logger;
+        }
+    }
+}