| // Copyright 2007 The Apache Software Foundation |
| // |
| // 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.apache.tapestry.ioc.internal.services; |
| |
| import org.apache.tapestry.ioc.Registry; |
| import org.apache.tapestry.ioc.internal.util.OneShotLock; |
| import org.slf4j.Logger; |
| |
| import java.util.List; |
| |
| /** |
| * Startup service for Tapestry IoC: automatically invoked at {@linkplain Registry#performRegistryStartup() registry |
| * startup} to execute a series of operations, via its ordered configuration of Runnable objects. |
| */ |
| public class RegistryStartup implements Runnable |
| { |
| private final Logger logger; |
| |
| private final List<Runnable> configuration; |
| |
| private final OneShotLock lock = new OneShotLock(); |
| |
| public RegistryStartup(Logger logger, final List<Runnable> configuration) |
| { |
| this.logger = logger; |
| this.configuration = configuration; |
| } |
| |
| /** |
| * Invokes run() on each contributed object. If the object throws a runtime exception, it is logged but startup |
| * continues anyway. This method may only be {@linkplain OneShotLock invoked once}. |
| */ |
| public void run() |
| { |
| lock.lock(); |
| |
| // Do we want extra exception catching here? |
| |
| for (Runnable r : configuration) |
| { |
| try |
| { |
| r.run(); |
| } |
| catch (RuntimeException ex) |
| { |
| logger.error(ServiceMessages.startupFailure(ex)); |
| } |
| } |
| |
| // We don't need them any more since this method can only be run once. It's a insignificant |
| // savings, but still a nice thing to do. |
| |
| configuration.clear(); |
| } |
| |
| } |