    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#PATTERN
    060         */
    061        public ObjectName getObjectName() {
    062            return objectName;
    063        }
    064
    065        @Override
    066        public String getImplementationClassName() {
    067            return selector.getClass().getName();
    068        }
    069    }