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80 lines
2.6 KiB
Java
80 lines
2.6 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package examples;
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import org.apache.log4j.Logger;
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import org.apache.log4j.BasicConfigurator;
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import org.apache.log4j.NDC;
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/**
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View the <a href="doc-files/Trivial.java">source code</a> of this a
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trivial usage example. Running <code>java examples.Trivial</code>
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should output something similar to:
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<pre>
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0 INFO [main] examples.Trivial (Client #45890) - Awake awake. Put on thy strength.
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15 DEBUG [main] examples.Trivial (Client #45890 DB) - Now king David was old.
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278 INFO [main] examples.Trivial$InnerTrivial (Client #45890) - Entered foo.
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293 INFO [main] examples.Trivial (Client #45890) - Exiting Trivial.
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</pre>
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<p> The increasing numbers at the beginning of each line are the
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times elapsed since the start of the program. The string between
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the parentheses is the nested diagnostic context.
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<p>See {@link Sort} and {@link SortAlgo} for sligtly more elaborate
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examples.
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<p>Note thent class files for the example code is not included in
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any of the distributed log4j jar files. You will have to add the
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directory <code>/dir-where-you-unpacked-log4j/classes</code> to
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your classpath before trying out the examples.
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*/
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public class Trivial {
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static Logger logger = Logger.getLogger(Trivial.class);
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public static void main(String[] args) {
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BasicConfigurator.configure();
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NDC.push("Client #45890");
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logger.info("Awake awake. Put on thy strength.");
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Trivial.foo();
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InnerTrivial.foo();
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logger.info("Exiting Trivial.");
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}
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static
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void foo() {
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NDC.push("DB");
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logger.debug("Now king David was old.");
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NDC.pop();
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}
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static class InnerTrivial {
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static Logger logger = Logger.getLogger(InnerTrivial.class);
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static
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void foo() {
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logger.info("Entered foo.");
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}
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}
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}
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