| /* |
| * Copyright (c) 2011, Rickard Öberg. |
| * Copyright (c) 2012, Niclas Hedhman. |
| * Copyright (c) 2012, Paul Merlin. |
| * |
| * Licensed 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.qi4j.api.activation; |
| |
| /** |
| * Interface used by Structure elements and Services that can be activated and passivated. |
| * <p>Application and Layer expose this interface so you can activate and passivate them.</p> |
| * <p>Module and ServiceComposite activation/passivation is handled by the Zest runtime.</p> |
| */ |
| public interface Activation |
| { |
| /** |
| * Activate. |
| * <p>Fail fast execution order is:</p> |
| * <ul> |
| * <li>Fire {@link ActivationEvent.EventType#ACTIVATING}</li> |
| * <li>Call {@link Activator#beforeActivation(java.lang.Object)} on each Activator</li> |
| * <li>Call {@link #activate()} children</li> |
| * <li>Call {@link Activator#afterActivation(java.lang.Object)} on each Activator</li> |
| * <li>Fire {@link ActivationEvent.EventType#ACTIVATED}</li> |
| * </ul> |
| * <p>If an Exception is thrown, already activated nodes are passivated.</p> |
| * @throws ActivationException with first Exception of activation plus the PassivationException if any |
| */ |
| void activate() |
| throws ActivationException; |
| |
| /** |
| * Passivate. |
| * <p>Fail safe execution order is:</p> |
| * <ul> |
| * <li>Fire {@link ActivationEvent.EventType#PASSIVATING}</li> |
| * <li>Call {@link Activator#beforePassivation(java.lang.Object)} on each Activator</li> |
| * <li>Call {@link #passivate()} children</li> |
| * <li>Call {@link Activator#afterPassivation(java.lang.Object)} on each Activator</li> |
| * <li>Fire {@link ActivationEvent.EventType#PASSIVATED}</li> |
| * </ul> |
| * @throws PassivationException after passivation with all Exceptions of passivation if any |
| */ |
| void passivate() |
| throws PassivationException; |
| } |