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Openfire monitoring messagearchive

I’m sorry for my bad english.
Hello there, please help me. There are two user names, user1 and user2.
User1’s message and User2 received. But I can not find this code. Where are these messages encoded for monitoring?
package com.reucon.openfire.plugin.archive.impl;
public class JdbcPersistenceManager
but there was no movement.
Photos;
openfire1

where is the piece of code that loads the messages in the received?