/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.oodt.cas.workflow.engine;
//OODT imports
import org.apache.oodt.cas.metadata.util.PathUtils;
import org.apache.oodt.cas.workflow.engine.runner.EngineRunner;
import org.apache.oodt.cas.workflow.instrepo.WorkflowInstanceRepository;
import org.apache.oodt.cas.workflow.lifecycle.WorkflowLifecycleManager;
import org.apache.oodt.cas.workflow.repository.WorkflowRepository;
import org.apache.oodt.cas.workflow.structs.PrioritySorter;
import org.apache.oodt.cas.workflow.util.GenericWorkflowObjectFactory;
/**
*
* Constructs an instance of the {@link PrioritizedQueueBasedWorkflowEngine},
* based on its constituent instance repository, workflow task prioritizer,
* workflow lifecycle, and engine runner.
*
* @author mattmann
* @version $Revision$
*
*/
public class PrioritizedQueueBasedWorkflowEngineFactory implements
WorkflowEngineFactory {
private static final String MODEL_REPO_FACTORY_PROPERTY = "workflow.repo.factory";
private static final String INSTANCE_REPO_FACTORY_PROPERTY = "workflow.engine.instanceRep.factory";
private static final String PRIORITIZER_CLASS_PROPERTY = "org.apache.oodt.cas.workflow.wengine.prioritizer";
private static final String LIFECYCLES_FILE_PATH_PROPERTY = "org.apache.oodt.cas.workflow.lifecycle.filePath";
private static final String ENGINE_RUNNER_CLASS = "workflow.wengine.runner.factory";
private static final String WAIT_SECS_PROPERTY = "org.apache.oodt.cas.workflow.wengine.taskquerier.waitSeconds";
/*
* (non-Javadoc)
*
* @see
* org.apache.oodt.cas.workflow.engine.WorkflowEngineFactory#createWorkflowEngine
* ()
*/
@Override
public WorkflowEngine createWorkflowEngine() {
try {
return new PrioritizedQueueBasedWorkflowEngine(
getWorkflowInstanceRepository(), getPrioritizer(),
getWorkflowLifecycle(), getEngineRunner(), getModelRepository(),
getWaitSeconds());
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
protected WorkflowRepository getModelRepository() {
return GenericWorkflowObjectFactory
.getWorkflowRepositoryFromClassName(System
.getProperty(MODEL_REPO_FACTORY_PROPERTY));
}
protected long getWaitSeconds() {
return Long.getLong(WAIT_SECS_PROPERTY, 2);
}
protected EngineRunner getEngineRunner() {
return GenericWorkflowObjectFactory.getEngineRunnerFromClassName(System
.getProperty(ENGINE_RUNNER_CLASS));
}
protected WorkflowLifecycleManager getWorkflowLifecycle()
throws InstantiationException {
return new WorkflowLifecycleManager(PathUtils.replaceEnvVariables(System
.getProperty(LIFECYCLES_FILE_PATH_PROPERTY)));
}
protected PrioritySorter getPrioritizer() {
return GenericWorkflowObjectFactory.getPrioritySorterFromClassName(System
.getProperty(PRIORITIZER_CLASS_PROPERTY));
}
protected WorkflowInstanceRepository getWorkflowInstanceRepository() {
return GenericWorkflowObjectFactory
.getWorkflowInstanceRepositoryFromClassName(System
.getProperty(INSTANCE_REPO_FACTORY_PROPERTY));
}
}