source: xssim/trunk/src/schedframe/scheduling/TimeRequirements.java @ 104

package schedframe.scheduling;

import java.io.StringWriter;
import java.io.Writer;
import java.util.Iterator;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.joda.time.DateTime;
import org.joda.time.Duration;
import org.joda.time.ReadableDuration;


import org.qcg.broker.schemas.resreqs.ExecutionTimeType;
import org.qcg.broker.schemas.resreqs.Task;

/**
 * 
 * @author Marcin Krystek
 *
 */
public class TimeRequirements extends AbstractTimeRequirements<ExecutionTimeType>{
        
        protected static Log log = LogFactory.getLog(TimeRequirements.class);

        private static final long serialVersionUID = -4011141375443906415L;

        protected TimeRequirements(){
        }
        
        public TimeRequirements(ExecutionTimeType execTimeType) throws NoSuchFieldException{
                this.timeRequirements = execTimeType;
                DateTime startTime = null;
                DateTime endTime = null;

                org.exolab.castor.types.Duration cd = execTimeType.getExecutionDuration();
                this.expectedDuration = new Duration(cd.toLong());

                
                try {
                        startTime = new DateTime(execTimeType.getTimePeriod().getPeriodStart().getTime());
                } catch (Exception e){
                        startTime = new DateTime();
                        log.warn("Period start is not defined.\n" + e.getMessage() + " Using current time: " + startTime);
                }
                
                try {
                        endTime = new DateTime(execTimeType.getTimePeriod().getTimePeriodChoice().getPeriodEnd().getTime());
                } catch (Exception e){
                        log.warn("Period end is not defined. Trying period duration...\n" + e.getMessage());
                        try {
                                org.exolab.castor.types.Duration duration = execTimeType.getTimePeriod().
                                                                                                                getTimePeriodChoice().getPeriodDuration();
                                endTime = new DateTime(startTime.getMillis() + duration.toLong());
                        } catch(Exception e1){
                                endTime = new DateTime(Long.MAX_VALUE);
                                log.warn("Period duration is not defined.\n" + e1.getMessage() + " Using infinity: " + endTime);
                        }
                }
                
                setEnd(endTime);
                setStart(startTime);
                
        }
        
        public TimeRequirements(TaskInterface<?> task) throws NoSuchFieldException{

                this.expectedDuration = task.getExpectedDuration();
                
                DateTime startTime = null;
                DateTime endTime = null;
                
                try {
                        startTime = task.getExecutionStartTime();
                } catch (NoSuchFieldException e) {
                        startTime = new DateTime();
                        log.warn(e.getMessage() + " Using current time as Start Time " + startTime);
                }
                
                try {
                        endTime = task.getExecutionEndTime();
                } catch(NoSuchFieldException e){
                        endTime = new DateTime(Long.MAX_VALUE);
                        log.warn(e.getMessage() + " Using infinity as End Time " + endTime);
                }
                
                setEnd(endTime);
                setStart(startTime);
                
                this.timeRequirements = ((Task)task.getDescription()).getExecutionTime();
                
        }
        
        public TimeRequirements(TaskInterface<?> task, long startInterval, long endInterval) throws NoSuchFieldException{
                long taskLength = task.getLength();
                long reqCpu = (long)task.getCpuCntRequest();
                long taskDuration = taskLength/reqCpu;
                long workloadLogWaitTime = task.getWorkloadLogWaitTime();
                long workloadLogStartTime = task.getSubmissionTimeToBroker().getMillis()/1000 + workloadLogWaitTime;
                long possibleStartTime = workloadLogStartTime - Math.min(workloadLogWaitTime, startInterval);

                DateTime startTime = null;
                DateTime endTime = null;
                                
                try {
                        startTime = task.getExecutionStartTime();
                } catch (NoSuchFieldException e) {
                        startTime = new DateTime(possibleStartTime * 1000);
                        log.warn(e.getMessage() + " Using current time as Start Time " + startTime);
                }

                try {
                        endTime = task.getExecutionEndTime();
                } catch(NoSuchFieldException e){
                        endTime = new DateTime(startTime.getMillis() + (int)taskDuration * 1000 + endInterval * 1000);
                        log.warn(e.getMessage() + " Using " + endTime + " as End Time");
                }
                
                setEnd(endTime);
                setStart(startTime);
                
                this.timeRequirements = ((Task)task.getDescription()).getExecutionTime();
                
        }

        public void setExpectedDuration(ReadableDuration duration){
                this.expectedDuration = duration;
        }
        
        public ExecutionTimeType getDescription() {
                return this.timeRequirements;
        }
        
        public String getDocument() throws Exception {
                Writer w = new StringWriter();
                this.timeRequirements.marshal(w);
                return w.toString();
        }
        
        public Iterator<AbstractTimeRequirements<?>> iterator(long interval){
                return new TimeIntervalItr(this, interval);
        }
        
        
        protected class LocalTimeRequirements extends AbstractTimeRequirements<Object> {

                private static final long serialVersionUID = 5132710437273933809L;

                public LocalTimeRequirements(DateTime startTime, DateTime endTime, ReadableDuration duration){
                        setEnd(endTime);
                        setStart(startTime);
                        this.expectedDuration = duration;
                }
                
                public Object getDescription() {
                        throw new RuntimeException("Not implementd.");
                }

                public String getDocument() throws Exception {
                        throw new RuntimeException("Not implemented.");
                }
                
        }
        
        protected class TimeIntervalItr implements Iterator<AbstractTimeRequirements<?>> {

                protected long interval;
                protected ReadableDuration duration;
                protected long endTime;
                protected AbstractTimeRequirements<?> next;
                
                public TimeIntervalItr(AbstractTimeRequirements<?> timeReq, long interval){
                        this.interval = interval;
                        this.endTime = timeReq.getEndMillis();
                        this.duration = timeReq.getExpectedDuration();
                        
                        DateTime start = timeReq.getStart();
                        DateTime end = start.plus(timeReq.getExpectedDuration());
                        
                        this.next = new LocalTimeRequirements(start, end, this.duration);
                }
                
                public boolean hasNext() {
                        
                        long intervalEnd = this.next.getEndMillis();
                        
                        return (intervalEnd <= endTime); 
                        
                }

                public AbstractTimeRequirements<?> next() {
                        AbstractTimeRequirements<?> ret = this.next;
                        
                        if(interval == 0) {
                                endTime = 0;
                        } else {
                                DateTime start = this.next.getStart().plus(interval);
                                DateTime end = this.next.getEnd().plus(interval);
                                
                                this.next = new LocalTimeRequirements(start, end, this.duration);
                        }
                        
                        return ret;
                        
                }

                public void remove() {
                        throw new RuntimeException("Not implemented.");
                }
                
        }

}