| /* |
| * |
| * 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.model; |
| |
| public interface ConfigurationChangeListener |
| { |
| /** |
| * Inform the listener that the passed object has changed state |
| * |
| * @param object the object whose state has changed |
| * @param oldState the state prior to the change |
| * @param newState the state after the change |
| */ |
| void stateChanged(ConfiguredObject<?> object, State oldState, State newState); |
| |
| void childAdded(ConfiguredObject<?> object, ConfiguredObject<?> child); |
| |
| void childRemoved(ConfiguredObject<?> object, ConfiguredObject<?> child); |
| |
| void attributeSet(ConfiguredObject<?> object, String attributeName, Object oldAttributeValue, Object newAttributeValue); |
| |
| /** |
| * Inform the listener that several attributes of an object are about to change. |
| * |
| * The listener may choose to defer any action in attributeSet until bulkChangeEnd is called. |
| * There should not be multiple calls to bulkChangeStart without matching bulkChangeEnd calls in between. |
| * There should be no calls to attributeSet for objects other than the one passed as an argument until bulkChangeEnd is called. |
| * There should be no call to childRemove between bulkChangeStart/-End calls. |
| * @param object the object whose state is about to change |
| * @see #bulkChangeEnd |
| */ |
| void bulkChangeStart(ConfiguredObject<?> object); |
| |
| /** |
| * Inform the listener that the changes announced by bulkChangeStart are complete. |
| * |
| * The listener who has chosen to defer any action in attributeSet after bulkChangeStart was called should now act on those changes. |
| * A call to bulkChangeEnd without a prior matching call to bulkChangeStart should have no effect. |
| * @param object the object whose state has changed |
| * @see #bulkChangeStart |
| */ |
| void bulkChangeEnd(ConfiguredObject<?> object); |
| } |