/*
* 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.modification;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.impalaframework.module.ModuleDefinition;
import org.impalaframework.module.ModuleState;
import org.impalaframework.module.RootModuleDefinition;
import org.impalaframework.module.definition.DependencyManager;
import org.impalaframework.module.definition.ModuleDefinitionUtils;
import org.impalaframework.module.spi.Application;
import org.impalaframework.module.spi.ModificationExtractor;
import org.impalaframework.module.spi.ModuleStateChange;
import org.impalaframework.module.spi.Transition;
import org.impalaframework.module.spi.TransitionSet;
/**
* Builds transition set which corresponds with moving all modules currently in {@link ModuleState#ERROR}
* or {@link ModuleState#DEPENDENCY_FAILED} into {@link ModuleState#LOADED}.
*
* @author Phil Zoio
*/
public class RepairModificationExtractor implements ModificationExtractor {
public TransitionSet getTransitions(Application application, RootModuleDefinition originalDefinition, RootModuleDefinition newDefinition) {
List<ModuleStateChange> transitions = new ArrayList<ModuleStateChange>();
RootModuleDefinition copy = ModuleDefinitionUtils.cloneAndUnfreeze(originalDefinition);
DependencyManager dependencyManager = new DependencyManager(copy);
Collection<ModuleDefinition> sortedModules = dependencyManager.getAllModules();
for (ModuleDefinition moduleDefinition : sortedModules) {
if (ModuleState.ERROR.equals(moduleDefinition.getState()) || ModuleState.DEPENDENCY_FAILED.equals(moduleDefinition.getState())) {
transitions.add(new ModuleStateChange(Transition.UNLOADED_TO_LOADED, moduleDefinition));
moduleDefinition.setState(ModuleState.LOADING);
}
}
copy.freeze();
return new TransitionSet(transitions, copy);
}
}