| /* |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| package org.apache.qpid.server.configuration.store; |
| |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Set; |
| import java.util.TreeSet; |
| import java.util.UUID; |
| |
| import org.apache.qpid.server.configuration.ConfigurationEntry; |
| import org.apache.qpid.server.configuration.ConfigurationEntryStore; |
| import org.apache.qpid.server.model.Broker; |
| import org.apache.qpid.server.model.ConfigurationChangeListener; |
| import org.apache.qpid.server.model.ConfiguredObject; |
| import org.apache.qpid.server.model.Model; |
| import org.apache.qpid.server.model.State; |
| import org.apache.qpid.server.model.VirtualHost; |
| |
| public class StoreConfigurationChangeListener implements ConfigurationChangeListener |
| { |
| private ConfigurationEntryStore _store; |
| |
| public StoreConfigurationChangeListener(ConfigurationEntryStore store) |
| { |
| super(); |
| _store = store; |
| } |
| |
| @Override |
| public void stateChanged(ConfiguredObject object, State oldState, State newState) |
| { |
| if (newState == State.DELETED) |
| { |
| _store.remove(object.getId()); |
| object.removeChangeListener(this); |
| } |
| } |
| |
| @Override |
| public void childAdded(ConfiguredObject object, ConfiguredObject child) |
| { |
| // exclude VirtualHost children from storing in broker store |
| if (!(object instanceof VirtualHost)) |
| { |
| child.addChangeListener(this); |
| ConfigurationEntry parentEntry = toConfigurationEntry(object); |
| ConfigurationEntry childEntry = toConfigurationEntry(child); |
| _store.save(parentEntry, childEntry); |
| } |
| |
| } |
| |
| @Override |
| public void childRemoved(ConfiguredObject object, ConfiguredObject child) |
| { |
| _store.save(toConfigurationEntry(object)); |
| } |
| |
| @Override |
| public void attributeSet(ConfiguredObject object, String attrinuteName, Object oldAttributeValue, Object newAttributeValue) |
| { |
| _store.save(toConfigurationEntry(object)); |
| } |
| |
| private ConfigurationEntry toConfigurationEntry(ConfiguredObject object) |
| { |
| Class<? extends ConfiguredObject> objectType = getConfiguredObjectType(object); |
| Set<UUID> childrenIds = getChildernIds(object, objectType); |
| ConfigurationEntry entry = new ConfigurationEntry(object.getId(), objectType.getSimpleName(), |
| object.getActualAttributes(), childrenIds, _store); |
| return entry; |
| } |
| |
| private Set<UUID> getChildernIds(ConfiguredObject object, Class<? extends ConfiguredObject> objectType) |
| { |
| // Virtual Host children's IDs should not be stored in broker store |
| if (object instanceof VirtualHost) |
| { |
| return Collections.emptySet(); |
| } |
| Set<UUID> childrenIds = new TreeSet<UUID>(); |
| Collection<Class<? extends ConfiguredObject>> childClasses = Model.getInstance().getChildTypes(objectType); |
| if (childClasses != null) |
| { |
| for (Class<? extends ConfiguredObject> childClass : childClasses) |
| { |
| Collection<? extends ConfiguredObject> children = object.getChildren(childClass); |
| if (children != null) |
| { |
| for (ConfiguredObject childObject : children) |
| { |
| childrenIds.add(childObject.getId()); |
| } |
| } |
| } |
| } |
| return childrenIds; |
| } |
| |
| private Class<? extends ConfiguredObject> getConfiguredObjectType(ConfiguredObject object) |
| { |
| if (object instanceof Broker) |
| { |
| return Broker.class; |
| } |
| return getConfiguredObjectTypeFromImplementedInterfaces(object.getClass()); |
| } |
| |
| @SuppressWarnings("unchecked") |
| private Class<? extends ConfiguredObject> getConfiguredObjectTypeFromImplementedInterfaces(Class<?> objectClass) |
| { |
| // get all implemented interfaces extending ConfiguredObject |
| Set<Class<?>> interfaces = getImplementedInterfacesExtendingSuper(objectClass, ConfiguredObject.class); |
| |
| if (interfaces.size() == 0) |
| { |
| throw new RuntimeException("Can not identify the configured object type"); |
| } |
| |
| if (interfaces.size() == 1) |
| { |
| return (Class<? extends ConfiguredObject>)interfaces.iterator().next(); |
| } |
| |
| Set<Class<?>> superInterfaces = new HashSet<Class<?>>(); |
| |
| // find all super interfaces |
| for (Class<?> interfaceClass : interfaces) |
| { |
| for (Class<?> interfaceClass2 : interfaces) |
| { |
| if (interfaceClass != interfaceClass2) |
| { |
| if (interfaceClass.isAssignableFrom(interfaceClass2)) |
| { |
| superInterfaces.add(interfaceClass); |
| } |
| } |
| } |
| } |
| |
| // remove super interfaces |
| for (Class<?> superInterface : superInterfaces) |
| { |
| interfaces.remove(superInterface); |
| } |
| |
| if (interfaces.size() == 1) |
| { |
| return (Class<? extends ConfiguredObject>)interfaces.iterator().next(); |
| } |
| else |
| { |
| throw new RuntimeException("Can not identify the configured object type as an it implements" |
| + " more than one configured object interfaces: " + interfaces); |
| } |
| |
| } |
| |
| private Set<Class<?>> getImplementedInterfacesExtendingSuper(Class<?> classInstance, Class<?> superInterface) |
| { |
| Set<Class<?>> interfaces = new HashSet<Class<?>>(); |
| Class<?>[] classInterfaces = classInstance.getInterfaces(); |
| for (Class<?> interfaceClass : classInterfaces) |
| { |
| if (interfaceClass!= superInterface && superInterface.isAssignableFrom(interfaceClass)) |
| { |
| interfaces.add(interfaceClass); |
| } |
| } |
| Class<?> superClass = classInstance.getSuperclass(); |
| if (superClass != null) |
| { |
| Set<Class<?>> superClassInterfaces = getImplementedInterfacesExtendingSuper(superClass, superInterface); |
| interfaces.addAll(superClassInterfaces); |
| } |
| return interfaces; |
| } |
| |
| @Override |
| public String toString() |
| { |
| return "StoreConfigurationChangeListener [store=" + _store + "]"; |
| } |
| } |