GetFriendsTimeLineOperation.java

/*******************************************************************************
 * Copyright 2010 Universidade do Minho, Ricardo Vila�a and Francisco Cruz
 * 
 * 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.ublog.benchmark.social.voldemort;


import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.log4j.Logger;
import org.ublog.benchmark.BenchOperation;
import org.ublog.benchmark.ComplexBenchMarkClient;
import org.ublog.benchmark.operations.CollectionOperation;
import org.ublog.benchmark.operations.DataStoreOperation;
import org.ublog.benchmark.operations.GetOperation;
import org.ublog.benchmark.operations.MultiGetOperation;
import org.ublog.benchmark.operations.OperationListener;
import org.ublog.benchmark.social.Message;
import org.ublog.benchmark.social.SocialBenchmark;
import org.ublog.benchmark.social.Utils;



public class GetFriendsTimeLineOperation implements BenchOperation,OperationListener{


	private Logger logger= Logger.getLogger(GetFriendsTimeLineOperation.class);

	private ComplexBenchMarkClient client;
	private String userId;
	private List<Message> tweetList;
	private List<String> timeline;
	private int start;
	private int count;

	public GetFriendsTimeLineOperation(ComplexBenchMarkClient client,String userId,int start,int count)
	{
		this.client=client;
		this.userId=userId;
		this.count=count;
		this.timeline=null;
		this.tweetList = null;
		this.start=start;
	}


	@Override
	public void handleFinishedOperation(DataStoreOperation op) {
		if (this.timeline==null)
		{
			timeline =(List<String>) ((GetOperation) op).getResult();
			if (this.timeline==null)
				this.timeline=new ArrayList<String>();
			if (logger.isInfoEnabled())
				logger.info("TimeLine:"+this.timeline);
		}
		else
		{
			Map<Comparable,Object> res=((MultiGetOperation<Comparable>) op).getResult();
			this.tweetList=new ArrayList<Message>(res.size());
			for(Comparable key:res.keySet())
			{
				this.tweetList.add(Utils.toTweet((Map<String,String>) res.get(key)));
			}
			Collections.sort(this.tweetList, new Comparator<Message>() {
				public int compare(Message o1, Message o2) {
					return -o1.getDate().compareTo(o2.getDate());
				}
			});
			this.client.handleFinishedComplexOperation(this);
			if (logger.isInfoEnabled())
				logger.info("Result of GetFriendsTimeline with userId:"+this.userId+", start:"+start+", and count:"+this.count+" is:"+this.tweetList);
		}
	}

	public List<Message> getResult()
	{
		return this.tweetList;
	}

	@Override
	public String getName() {
		return "twitter:getFriendsTimeLine";
	}


	@Override
	public CollectionOperation getNextDBOperation() {
		CollectionOperation res=null;
		if (this.timeline==null)
		{
			
			res=new GetOperation(client,SocialBenchmark.friendsTimeLineTable,this.userId,250);
		}
		else
		{

			int count = Math.min(this.count, timeline.size()-this.start);
			int end=this.start+count;
			if (logger.isInfoEnabled())
				logger.info("Indexes- start:"+this.start+";count:"+this.count+";timeline size:"+this.timeline.size()+";end:"+end);
			Set<String> keys=new HashSet<String>();
			for(int i=this.start;i<end;i++)
			{
				String idAndTime = timeline.get(i/*start*/);
				String[] split = idAndTime.split(":");
				keys.add(split[0]);
			}
			res=new MultiGetOperation<String>(client,SocialBenchmark.tweetsTable,keys);
		}
		res.addListener(this);
		return res;
	}


	@Override
	public boolean hasMoreDBOperations() {
		return this.tweetList==null;
	}


	@Override
	public String toString() {
		return "GetFriendsTimeLineOperation [count=" + count
		+ ", timelineIndex=" + start + ", userId=" + userId
		+ "]";
	}


	@Override
	public boolean isInit() {
		return false;
	}


	@Override
	public boolean isReadOnly() {
		return false;
	}


	@Override
	public void setInit(boolean init) {		
	}

}