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  package org.apache.logging.log4j.taglib;
    18
    19  import javax.servlet.jsp.JspException;
    20  import javax.servlet.jsp.tagext.Tag;
    21
    22  import org.apache.logging.log4j.Level;
    23
    24  /**
    25   * This class implements the {@code <log:catching>} tag.
    26   *
    27   * @since 2.0
    28   */
    29  public class CatchingTag extends ExceptionAwareTagSupport {
    30      private static final long serialVersionUID = 1L;
    31
    32      private static final String FQCN = CatchingTag.class.getName();
    33
    34      private Level level;
    35
    36      @Override
    37      protected void init() {
    38          super.init();
    39          this.level = null;
    40      }
    41
    42      public void setLevel(final Object level) {
    43          this.level = TagUtils.resolveLevel(level);
    44      }
    45
    46      @Override
    47      public int doEndTag() throws JspException {
    48          final Log4jTaglibLogger logger = this.getLogger();
    49
    50          if (this.level == null) {
    51              logger.catching(FQCN, Level.ERROR, this.getException());
    52          } else {
    53              logger.catching(FQCN, this.level, this.getException());
    54          }
    55
    56          return Tag.EVAL_PAGE;
    57      }
    58  }