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.geronimo.monitoring;
018    
019    import java.net.URI;
020    import java.util.HashSet;
021    import java.util.Iterator;
022    import java.util.Set;
023    
024    import javax.management.ObjectName;
025    
026    import org.apache.geronimo.kernel.Kernel;
027    import org.apache.geronimo.kernel.KernelRegistry;
028    
029    import org.apache.geronimo.gbean.AbstractName;
030    import org.apache.geronimo.gbean.AbstractNameQuery;
031    
032    public class MBeanHelper {
033        
034        /**
035         * Return all MBeans that provide stats
036         */
037        public static Set<String> getStatsProvidersMBeans(Set<String> allMBeans) {
038            Kernel kernel = KernelRegistry.getSingleKernel();
039            Set<String> result = new HashSet();
040    
041            try {
042                for (Iterator it = allMBeans.iterator(); it.hasNext(); ) {
043                    try {
044                        String mbeanName = (String) it.next();
045                        Boolean statisticsProvider = (Boolean) kernel.getAttribute(new ObjectName(mbeanName), "statisticsProvider");
046                        if (Boolean.TRUE.equals(statisticsProvider)) {
047                            result.add(mbeanName);
048                        }
049                    } catch (Exception e) {
050                        // this will happen if there is not a matching attribute "statisticsProvider"
051                    }
052                }
053            } catch(Exception e) {
054                e.printStackTrace();
055            }
056    
057            return result;
058        }
059    }