/*
* 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 java.util.HashMap;
import java.util.Map;
import org.impalaframework.module.ModuleDefinition;
import org.impalaframework.module.RootModuleDefinition;
import org.impalaframework.module.spi.ModuleStateHolder;
import org.springframework.util.Assert;
/**
* {@link ModuleOperation} implementation which contains functionality for implementing reloading of a named module.
* Unlike {@link ReloadNamedModuleOperation}, this class does not require an exact match of the module to be renamed.
* Instead, it searches the module hierarchy/graph, and reloads the first module whose name contains the supplied
* String on which to match.
*
* @see ReloadNamedModuleOperation
* @author Phil Zoio
*/
public class ReloadModuleNamedLikeOperation extends BaseModuleOperation {
private ModuleOperationRegistry moduleOperationRegistry;
protected ReloadModuleNamedLikeOperation() {
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 used to match the module to reload in "
+ this.getClass().getName());
ModuleStateHolder moduleStateHolder = getModuleStateHolder();
RootModuleDefinition newDefinition = moduleStateHolder.cloneRootModuleDefinition();
ModuleDefinition found = newDefinition.findChildDefinition(moduleToReload, false);
if (found != null) {
String foundModuleName = found.getName();
Assert.notNull(moduleOperationRegistry, "moduleOperationRegistry cannot be null");
ModuleOperation operation = moduleOperationRegistry.getOperation(
ModuleOperationConstants.ReloadNamedModuleOperation);
operation.execute(new ModuleOperationInput(null, null, foundModuleName));
Map<String, Object> resultMap = new HashMap<String, Object>();
resultMap.put("moduleName", foundModuleName);
return new ModuleOperationResult(true, resultMap);
}
else {
return ModuleOperationResult.FALSE;
}
}
public void setModuleOperationRegistry(ModuleOperationRegistry moduleOperationRegistry) {
this.moduleOperationRegistry = moduleOperationRegistry;
}
}