/**
* 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;
//JDK imports
import java.util.Calendar;
//OODT imports
import org.apache.oodt.cas.metadata.Metadata;
import org.apache.oodt.cas.workflow.engine.processor.TaskProcessor;
import org.apache.oodt.cas.workflow.engine.processor.WorkflowProcessorQueue;
import org.apache.oodt.cas.workflow.structs.PrioritySorter;
import org.apache.oodt.commons.date.DateUtils;
/**
*
* Intercepts the calls to {@link TaskQuerier#getNext()} and injects
* StartDateTime (and potentially other met fields into the
* {@link TaskProcessor#getDynamicMetadata()}.
*
* @author mattmann
* @version $Revision$
*
*/
public class MetSetterTaskQuerier extends TaskQuerier {
private static final long WAIT_SECS=1;
/**
* @param processorQueue
* @param prioritizer
*/
public MetSetterTaskQuerier(WorkflowProcessorQueue processorQueue,
PrioritySorter prioritizer) {
super(processorQueue, prioritizer, null, WAIT_SECS);
}
/*
* (non-Javadoc)
*
* @see org.apache.oodt.cas.workflow.engine.TaskQuerier#getNext()
*/
@Override
public TaskProcessor getNext() {
TaskProcessor taskProcessor = super.getNext();
if(taskProcessor == null) return null;
Metadata met = new Metadata();
met.addMetadata("StartDateTime", DateUtils.toString(Calendar.getInstance()));
taskProcessor.getWorkflowInstance().setSharedContext(met);
return taskProcessor;
}
}