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package org.apache.james.imap.functional;

import java.io.ByteArrayInputStream;
import java.util.Date;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.atomic.AtomicBoolean;

import javax.mail.Flags;

import org.apache.commons.logging.impl.SimpleLog;
import org.apache.james.mailbox.MailboxConstants;
import org.apache.james.mailbox.MailboxException;
import org.apache.james.mailbox.MailboxPath;
import org.apache.james.mailbox.MailboxSession;
import org.apache.james.mailbox.MessageManager;
import org.apache.james.mailbox.store.StoreMailboxManager;
import org.junit.Test;

public abstract class AbstractStressTest {

    private final static int APPEND_OPERATIONS = 200;
    
    
    protected abstract StoreMailboxManager getMailboxManager();
    
    @Test
    public void testStessTest() throws InterruptedException, MailboxException {
       
        final CountDownLatch latch = new CountDownLatch(APPEND_OPERATIONS);
        final ExecutorService pool = Executors.newFixedThreadPool(APPEND_OPERATIONS/2);
        
        MailboxSession session = getMailboxManager().createSystemSession("test", new SimpleLog("Test"));
        getMailboxManager().startProcessingRequest(session);
        final MailboxPath path = new MailboxPath(MailboxConstants.USER_NAMESPACE, "username", "INBOX");
        getMailboxManager().createMailbox(path, session);
        getMailboxManager().endProcessingRequest(session);
        getMailboxManager().logout(session, false);
        final AtomicBoolean fail = new AtomicBoolean(false);
        
        // fire of 1000 append operations
        for (int i = 0 ; i < APPEND_OPERATIONS; i++) {
            pool.execute(new Runnable() {
                
                public void run() {
                    if (fail.get()){
                        latch.countDown();
                        return;
                    }
                    
                    MailboxSession session = getMailboxManager().createSystemSession("test", new SimpleLog("Test"));

                    try {
                        getMailboxManager().startProcessingRequest(session);
                        MessageManager m = getMailboxManager().getMailbox(path, session);
                        
                        System.out.println("Append message with uid=" + m.appendMessage(new ByteArrayInputStream("Subject: test\r\n\r\ntestmail".getBytes()), new Date(), session, false, new Flags()));
                        getMailboxManager().endProcessingRequest(session);
                        getMailboxManager().logout(session,false);
                    } catch (MailboxException e) {
                        e.printStackTrace();
                        fail.set(true);
                    } finally {
                        latch.countDown();
                    }
                    
                    
                }
            });
        }
        
        latch.await();
        
        org.junit.Assert.assertFalse("Unable to append all messages",fail.get());
        pool.shutdown();

        
    }
}