/*
* Copyright 2007-2010 the original author or authors.
*
* 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.impalaframework.module.spring.transition;
import java.util.ArrayList;
import java.util.List;
import org.impalaframework.module.ModuleDefinition;
import org.impalaframework.module.RootModuleDefinition;
import org.impalaframework.module.loader.ModuleLoaderRegistry;
import org.impalaframework.module.runtime.ModuleRuntimeUtils;
import org.impalaframework.module.spi.Application;
import org.impalaframework.module.spi.ModuleLoader;
import org.impalaframework.module.spi.ModuleStateHolder;
import org.impalaframework.module.spi.TransitionProcessor;
import org.impalaframework.spring.module.SpringModuleLoader;
import org.impalaframework.spring.module.SpringModuleUtils;
import org.impalaframework.util.ObjectUtils;
import org.springframework.beans.factory.support.BeanDefinitionReader;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.core.io.Resource;
public class AddLocationsTransitionProcessor implements TransitionProcessor {
private ModuleLoaderRegistry moduleLoaderRegistry;
private ModuleStateHolder moduleStateHolder;
public AddLocationsTransitionProcessor(ModuleLoaderRegistry moduleLoaderRegistry) {
super();
this.moduleLoaderRegistry = moduleLoaderRegistry;
}
public void process(Application application, RootModuleDefinition newRootDefinition, ModuleDefinition moduleDefinition) {
final ModuleLoader loader = moduleLoaderRegistry.getModuleLoader(ModuleRuntimeUtils.getModuleLoaderKey(newRootDefinition));
final SpringModuleLoader moduleLoader = ObjectUtils.cast(loader, SpringModuleLoader.class);
ConfigurableApplicationContext parentContext = SpringModuleUtils.getRootSpringContext(moduleStateHolder);
ClassLoader classLoader = parentContext.getClassLoader();
RootModuleDefinition existingModuleDefinition = moduleStateHolder.getRootModuleDefinition();
String applicationId = application.getId();
Resource[] existingResources = moduleLoader.getSpringConfigResources(applicationId, existingModuleDefinition, classLoader);
Resource[] newResources = moduleLoader.getSpringConfigResources(applicationId, newRootDefinition, classLoader);
// compare difference
List<Resource> existingResourceList = newResourceList(existingResources);
List<Resource> newResourceList = newResourceList(newResources);
List<Resource> toAddList = new ArrayList<Resource>();
for (Resource resource : newResourceList) {
if (!existingResourceList.contains(resource)) {
toAddList.add(resource);
}
}
BeanDefinitionReader beanDefinitionReader = moduleLoader.newBeanDefinitionReader(applicationId,
parentContext, newRootDefinition);
beanDefinitionReader.loadBeanDefinitions(toAddList.toArray(new Resource[toAddList.size()]));
}
private List<Resource> newResourceList(Resource[] array) {
List<Resource> list = new ArrayList<Resource>();
for (Resource resource : array) {
list.add(resource);
}
return list;
}
public void setModuleStateHolder(ModuleStateHolder moduleStateHolder) {
this.moduleStateHolder = moduleStateHolder;
}
}