/*
* Copyright 2007-2008 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.operation;
import org.impalaframework.module.ModificationExtractor;
import org.impalaframework.module.ModificationExtractorType;
import org.impalaframework.module.ModuleStateHolder;
import org.impalaframework.module.TransitionSet;
import org.impalaframework.module.definition.ModuleDefinition;
import org.impalaframework.module.definition.ModuleState;
import org.impalaframework.module.definition.RootModuleDefinition;
import org.impalaframework.module.modification.ModificationExtractorRegistry;
import org.springframework.util.Assert;
public class ReloadNamedModuleOperation extends BaseModuleOperation {
protected ReloadNamedModuleOperation() {
super();
}
public ModuleOperationResult doExecute(ModuleOperationInput moduleOperationInput) {
Assert.notNull(moduleOperationInput, "moduleOperationInput cannot be null");
String moduleToReload = moduleOperationInput.getModuleName();
Assert.notNull(moduleToReload, "moduleName is required as it specifies the name of the module to reload in "
+ this.getClass().getName());
ModuleStateHolder moduleStateHolder = getModuleStateHolder();
RootModuleDefinition oldRootDefinition = moduleStateHolder.cloneRootModuleDefinition();
RootModuleDefinition newRootDefinition = moduleStateHolder.cloneRootModuleDefinition();
ModificationExtractorRegistry modificationExtractor = getModificationExtractorRegistry();
ModificationExtractor calculator = modificationExtractor
.getModificationExtractor(ModificationExtractorType.STRICT);
ModuleDefinition childDefinition = newRootDefinition.findChildDefinition(moduleToReload, true);
if (childDefinition != null) {
childDefinition.setState(ModuleState.STALE);
TransitionSet transitions = calculator.getTransitions(oldRootDefinition, newRootDefinition);
moduleStateHolder.processTransitions(transitions);
boolean result = !transitions.getModuleTransitions().isEmpty();
return result ? ModuleOperationResult.TRUE : ModuleOperationResult.FALSE;
}
return ModuleOperationResult.FALSE;
}
}