View Javadoc

    1   /*
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements.  See the NOTICE file distributed with
    4    * this work for additional information regarding copyright ownership.
    5    * The ASF licenses this file to You under the Apache License, Version 2.0
    6    * (the "License"); you may not use this file except in compliance with
    7    * the License.  You may obtain a copy of the License at
    8    *
    9    *      http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17
    18  package org.apache.log4j;
    19
    20  import org.apache.log4j.spi.LoggingEvent;
    21
    22  /**
    23     SimpleLayout consists of the level of the log statement,
    24     followed by " - " and then the log message itself. For example,
    25
    26     <pre>
    27             DEBUG - Hello world
    28     </pre>
    29
    30     <p>
    31     @author Ceki G&uuml;lc&uuml;
    32     @since version 0.7.0
    33
    34     <p>{@link PatternLayout} offers a much more powerful alternative.
    35  */
    36  public class SimpleLayout extends Layout {
    37
    38    StringBuffer sbuf = new StringBuffer(128);
    39
    40    public SimpleLayout() {
    41    }
    42
    43    public
    44    void activateOptions() {
    45    }
    46
    47    /**
    48       Returns the log statement in a format consisting of the
    49       <code>level</code>, followed by " - " and then the
    50       <code>message</code>. For example, <pre> INFO - "A message"
    51       </pre>
    52
    53       <p>The <code>category</code> parameter is ignored.
    54       <p>
    55       @return A byte array in SimpleLayout format.
    56      */
    57    public
    58    String format(LoggingEvent event) {
    59
    60      sbuf.setLength(0);
    61      sbuf.append(event.getLevel().toString());
    62      sbuf.append(" - ");
    63      sbuf.append(event.getRenderedMessage());
    64      sbuf.append(LINE_SEP);
    65      return sbuf.toString();
    66    }
    67
    68  /**
    69       The SimpleLayout does not handle the throwable contained within
    70       {@link LoggingEvent LoggingEvents}. Thus, it returns
    71       <code>true</code>.
    72
    73       @since version 0.8.4 */
    74    public
    75    boolean ignoresThrowable() {
    76      return true;
    77    }
    78  }