[appengine-java] Re: CPU Time Overload

[Ted Conn]

Ok, I actually read that article before but somehow didnt think it
would apply to me... Now I am using a counter object which I am
retrieving by id, and trying to increment a value in an array by 1 and
then just referencing that counter object to retrieve the values
(instead of creating a new Vote object every time there is a vote)


What I am experiencing now is that the integer in the array is not
being incremented. It increments but then when I submit a new vote,
retrieve the counter by poll_id, and read the value in the array, it is
mysteriously back to its original value of zero.


Its like its not being persistent, I am calling
pm.makePersistent(counter) after incrementing, is there any
known "gotchas" to incrementing an object or maintaining persistence?


Attached is my counter object and vote(int answerId) is the method I am
calling to increment the value in the array...

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package net.creativelift.snappypoll;

import javax.jdo.annotations.IdGeneratorStrategy;
import javax.jdo.annotations.IdentityType;
import javax.jdo.annotations.PersistenceCapable;
import javax.jdo.annotations.Persistent;
import javax.jdo.annotations.PrimaryKey;

import com.google.appengine.api.datastore.Key;

@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class Counter
{
	@PrimaryKey
	@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
	private Key key;
	
	@Persistent
	private String poll_id;
	
	@Persistent
	private int[] answers;
	
	public Counter(String poll_id, int[] answers)
	{
		this.poll_id = poll_id;
		this.answers = answers;
	}
	
	public Key getKey()
	{
		return key;
	}
	
	public int[] getAnswers()
	{
		return answers;
	}
	
	public String getPollId()
	{
		return poll_id;
	}
	
	public void setPollId(String poll_id)
	{
		this.poll_id = poll_id;
	}
	
	public int getVote(Integer answerId)
	{
		return answers[answerId];
	}
	
	public int vote(int answerId)
	{
		answers[answerId] += 1;
		return answers[answerId];
	}
}