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:exit>} tag.
26 *
27 * @since 2.0
28 */
29 public class ExitTag extends LoggerAwareTagSupport {
30 private static final long serialVersionUID = 1L;
31
32 private static final String FQCN = ExitTag.class.getName();
33
34 private transient Object result;
35
36 @Override
37 protected void init() {
38 super.init();
39 this.result = null;
40 }
41
42 public void setResult(final Object result) {
43 this.result = result;
44 }
45
46 @Override
47 public int doEndTag() throws JspException {
48 final Log4jTaglibLogger logger = this.getLogger();
49
50 if (TagUtils.isEnabled(logger, Level.TRACE, null)) {
51 if (this.result == null) {
52 logger.exit(FQCN, null);
53 } else {
54 logger.exit(FQCN, this.result);
55 }
56 }
57
58 return Tag.EVAL_PAGE;
59 }
60 }