Author: jerome
Date: Mon Jun 12 13:52:37 2006
New Revision: 413743
URL: http://svn.apache.org/viewvc?rev=413743&view=rev
Log:
NUTCH-303 : Add missing LogUtil class
Added:
lucene/nutch/trunk/src/java/org/apache/nutch/util/LogUtil.java (with
props)
Added: lucene/nutch/trunk/src/java/org/apache/nutch/util/LogUtil.java
URL:
http://svn.apache.org/viewvc/lucene/nutch/trunk/src/java/org/apache/nutch/util/LogUtil.java?rev=413743&view=auto
==============================================================================
--- lucene/nutch/trunk/src/java/org/apache/nutch/util/LogUtil.java (added)
+++ lucene/nutch/trunk/src/java/org/apache/nutch/util/LogUtil.java Mon Jun 12
13:52:37 2006
@@ -0,0 +1,110 @@
+/**
+ * Copyright 2005 The Apache Software Foundation
+ *
+ * Licensed 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.nutch.util;
+
+// JDK imports
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.PrintStream;
+import java.lang.reflect.Method;
+
+// Commons Logging imports
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+
+/**
+ * Utility class for logging.
+ *
+ * @author Jérôme Charron
+ */
+public class LogUtil {
+
+ private final static Log LOG = LogFactory.getLog(LogUtil.class);
+
+ private static Method TRACE = null;
+ private static Method DEBUG = null;
+ private static Method INFO = null;
+ private static Method WARN = null;
+ private static Method ERROR = null;
+ private static Method FATAL = null;
+
+ static {
+ try {
+ TRACE = Log.class.getMethod("trace", new Class[] { Object.class });
+ DEBUG = Log.class.getMethod("debug", new Class[] { Object.class });
+ INFO = Log.class.getMethod("info", new Class[] { Object.class });
+ WARN = Log.class.getMethod("warn", new Class[] { Object.class });
+ ERROR = Log.class.getMethod("error", new Class[] { Object.class });
+ FATAL = Log.class.getMethod("fatal", new Class[] { Object.class });
+ } catch(Exception e) {
+ LOG.error("Cannot init log methods", e);
+ }
+ }
+
+
+ public static PrintStream getTraceStream(final Log logger) {
+ return getLogStream(logger, TRACE);
+ }
+
+ public static PrintStream getDebugStream(final Log logger) {
+ return getLogStream(logger, DEBUG);
+ }
+
+ public static PrintStream getInfoStream(final Log logger) {
+ return getLogStream(logger, INFO);
+ }
+
+ public static PrintStream getWarnStream(final Log logger) {
+ return getLogStream(logger, WARN);
+ }
+
+ public static PrintStream getErrorStream(final Log logger) {
+ return getLogStream(logger, ERROR);
+ }
+
+ public static PrintStream getFatalStream(final Log logger) {
+ return getLogStream(logger, FATAL);
+ }
+
+ /** Returns a stream that, when written to, adds log lines. */
+ private static PrintStream getLogStream(final Log logger, final Method
method) {
+ return new PrintStream(new ByteArrayOutputStream() {
+ private int scan = 0;
+
+ private boolean hasNewline() {
+ for (; scan < count; scan++) {
+ if (buf[scan] == '\n')
+ return true;
+ }
+ return false;
+ }
+
+ public void flush() throws IOException {
+ if (!hasNewline())
+ return;
+ try {
+ method.invoke(logger, new Object[] { toString().trim() });
+ } catch (Exception e) {
+ LOG.fatal("Cannot log with method [" + method + "]", e);
+ }
+ reset();
+ scan = 0;
+ }
+ }, true);
+ }
+
+}
Propchange: lucene/nutch/trunk/src/java/org/apache/nutch/util/LogUtil.java
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