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java/org/apache/juli/logging/DirectJDKLog.java

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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.juli.logging;
+
+import java.util.logging.ConsoleHandler;
+import java.util.logging.Formatter;
+import java.util.logging.Handler;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ * Hard-coded java.util.logging commons-logging implementation.
+ */
+class DirectJDKLog implements Log {
+    // no reason to hide this - but good reasons to not hide
+    public final Logger logger;
+
+    // Alternate config reader and console format
+    private static final String SIMPLE_FMT="java.util.logging.SimpleFormatter";
+    private static final String FORMATTER="org.apache.juli.formatter";
+
+    static {
+        if (System.getProperty("java.util.logging.config.class") == null  &&
+                System.getProperty("java.util.logging.config.file") == null) {
+            // default configuration - it sucks. Let's override at least the
+            // formatter for the console
+            try {
+                Formatter fmt= (Formatter) Class.forName(System.getProperty(
+                        FORMATTER, SIMPLE_FMT)).getConstructor().newInstance();
+                // it is also possible that the user modified jre/lib/logging.properties -
+                // but that's really stupid in most cases
+                Logger root=Logger.getLogger("");
+                for (Handler handler : root.getHandlers()) {
+                    // I only care about console - that's what's used in default config anyway
+                    if (handler instanceof  ConsoleHandler) {
+                        handler.setFormatter(fmt);
+                    }
+                }
+            } catch (Throwable t) {
+                // maybe it wasn't included - the ugly default will be used.
+            }
+
+        }
+    }
+
+    public DirectJDKLog(String name ) {
+        logger=Logger.getLogger(name);
+    }
+
+    @Override
+    public final boolean isErrorEnabled() {
+        return logger.isLoggable(Level.SEVERE);
+    }
+
+    @Override
+    public final boolean isWarnEnabled() {
+        return logger.isLoggable(Level.WARNING);
+    }
+
+    @Override
+    public final boolean isInfoEnabled() {
+        return logger.isLoggable(Level.INFO);
+    }
+
+    @Override
+    public final boolean isDebugEnabled() {
+        return logger.isLoggable(Level.FINE);
+    }
+
+    @Override
+    public final boolean isFatalEnabled() {
+        return logger.isLoggable(Level.SEVERE);
+    }
+
+    @Override
+    public final boolean isTraceEnabled() {
+        return logger.isLoggable(Level.FINER);
+    }
+
+    @Override
+    public final void debug(Object message) {
+        log(Level.FINE, String.valueOf(message), null);
+    }
+
+    @Override
+    public final void debug(Object message, Throwable t) {
+        log(Level.FINE, String.valueOf(message), t);
+    }
+
+    @Override
+    public final void trace(Object message) {
+        log(Level.FINER, String.valueOf(message), null);
+    }
+
+    @Override
+    public final void trace(Object message, Throwable t) {
+        log(Level.FINER, String.valueOf(message), t);
+    }
+
+    @Override
+    public final void info(Object message) {
+        log(Level.INFO, String.valueOf(message), null);
+    }
+
+    @Override
+    public final void info(Object message, Throwable t) {
+        log(Level.INFO, String.valueOf(message), t);
+    }
+
+    @Override
+    public final void warn(Object message) {
+        log(Level.WARNING, String.valueOf(message), null);
+    }
+
+    @Override
+    public final void warn(Object message, Throwable t) {
+        log(Level.WARNING, String.valueOf(message), t);
+    }
+
+    @Override
+    public final void error(Object message) {
+        log(Level.SEVERE, String.valueOf(message), null);
+    }
+
+    @Override
+    public final void error(Object message, Throwable t) {
+        log(Level.SEVERE, String.valueOf(message), t);
+    }
+
+    @Override
+    public final void fatal(Object message) {
+        log(Level.SEVERE, String.valueOf(message), null);
+    }
+
+    @Override
+    public final void fatal(Object message, Throwable t) {
+        log(Level.SEVERE, String.valueOf(message), t);
+    }
+
+    // from commons logging. This would be my number one reason why java.util.logging
+    // is bad - design by committee can be really bad ! The impact on performance of
+    // using java.util.logging - and the ugliness if you need to wrap it - is far
+    // worse than the unfriendly and uncommon default format for logs.
+
+    private void log(Level level, String msg, Throwable ex) {
+        if (logger.isLoggable(level)) {
+            // Hack (?) to get the stack trace.
+            Throwable dummyException=new Throwable();
+            StackTraceElement locations[]=dummyException.getStackTrace();
+            // Caller will be the third element
+            String cname = "unknown";
+            String method = "unknown";
+            if (locations != null && locations.length >2) {
+                StackTraceElement caller = locations[2];
+                cname = caller.getClassName();
+                method = caller.getMethodName();
+            }
+            if (ex==null) {
+                logger.logp(level, cname, method, msg);
+            } else {
+                logger.logp(level, cname, method, msg, ex);
+            }
+        }
+    }
+
+    static Log getInstance(String name) {
+        return new DirectJDKLog( name );
+    }
+}
+
+