001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements. See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache license, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License. You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the license for the specific language governing permissions and
015     * limitations under the license.
016     */
017    package org.apache.logging.log4j.core.jmx;
018    
019    import javax.management.ObjectName;
020    
021    import org.apache.logging.log4j.core.selector.ContextSelector;
022    import org.apache.logging.log4j.core.util.Assert;
023    
024    /**
025     * Implementation of the {@code ContextSelectorAdminMBean} interface.
026     */
027    public class ContextSelectorAdmin implements ContextSelectorAdminMBean {
028    
029        private final ObjectName objectName;
030        private final ContextSelector selector;
031    
032        /**
033         * Constructs a new {@code ContextSelectorAdmin}.
034         * 
035         * @param contextName name of the LoggerContext under which to register this
036         *            ContextSelectorAdmin. Note that the ContextSelector may be
037         *            registered multiple times, once for each LoggerContext. In web
038         *            containers, each web application has its own LoggerContext and
039         *            by associating the ContextSelector with the LoggerContext, all
040         *            associated MBeans can be unloaded when the web application is
041         *            undeployed.
042         * @param selector the instrumented object
043         */
044        public ContextSelectorAdmin(final String contextName, final ContextSelector selector) {
045            super();
046            this.selector = Assert.requireNonNull(selector, "ContextSelector");
047            try {
048                final String mbeanName = String.format(PATTERN, Server.escape(contextName));
049                objectName = new ObjectName(mbeanName);
050            } catch (final Exception e) {
051                throw new IllegalStateException(e);
052            }
053        }
054    
055        /**
056         * Returns the {@code ObjectName} of this mbean.
057         * 
058         * @return the {@code ObjectName}
059         * @see ContextSelectorAdminMBean#NAME
060         */
061        public ObjectName getObjectName() {
062            return objectName;
063        }
064    
065        @Override
066        public String getImplementationClassName() {
067            return selector.getClass().getName();
068        }
069    }