// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you 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 com.cloud.async;

import java.util.List;

import javax.inject.Inject;

import junit.framework.TestCase;

import org.apache.log4j.Logger;
import org.junit.Assert;


public class TestSyncQueueManager extends TestCase {
    public static final Logger s_logger = Logger.getLogger(TestSyncQueueManager.class.getName());

    private volatile int count = 0;
    private volatile long expectingCurrent = 1;
    @Inject SyncQueueManager mgr;

    public void leftOverItems() {

        List<SyncQueueItemVO> l = mgr.getActiveQueueItems(1L, false);
        if(l != null && l.size() > 0) {
            for(SyncQueueItemVO item : l) {
                s_logger.info("Left over item: " + item.toString());
                mgr.purgeItem(item.getId());
            }
        }
    }

    public void dequeueFromOneQueue() {
        final int totalRuns = 5000;
        final SyncQueueVO queue = mgr.queue("vm_instance", 1L, "Async-job", 1, 1);
        for(int i = 1; i < totalRuns; i++)
            mgr.queue("vm_instance", 1L, "Async-job", i+1, 1);

        count = 0;
        expectingCurrent = 1;
        Thread thread1 = new Thread(new Runnable() {
            @Override
            public void run() {
                while(count < totalRuns) {
                    SyncQueueItemVO item = mgr.dequeueFromOne(queue.getId(), 1L);
                    if(item != null) {
                        s_logger.info("Thread 1 process item: " + item.toString());

                        Assert.assertEquals(expectingCurrent, item.getContentId().longValue());
                        expectingCurrent++;
                        count++;

                        mgr.purgeItem(item.getId());
                    }
                    try {
                        Thread.sleep(100);
                    } catch (InterruptedException e) {
                    }
                }
            }
        }
                );

        Thread thread2 = new Thread(new Runnable() {
            @Override
            public void run() {
                while(count < totalRuns) {
                    SyncQueueItemVO item = mgr.dequeueFromOne(queue.getId(), 1L);
                    if(item != null) {
                        s_logger.info("Thread 2 process item: " + item.toString());

                        Assert.assertEquals(expectingCurrent, item.getContentId().longValue());
                        expectingCurrent++;
                        count++;
                        mgr.purgeItem(item.getId());
                    }

                    try {
                        Thread.sleep(100);
                    } catch (InterruptedException e) {
                    }
                }
            }
        }
                ); 

        thread1.start();
        thread2.start();
        try {
            thread1.join();
        } catch (InterruptedException e) {
        }
        try {
            thread2.join();
        } catch (InterruptedException e) {
        }

        Assert.assertEquals(totalRuns, count);
    }

    public void dequeueFromAnyQueue() {
        // simulate 30 queues
        final int queues = 30;
        final int totalRuns = 100;
        final int itemsPerRun = 20;
        for(int q = 1; q <= queues; q++)
            for(int i = 0; i < totalRuns; i++)
                mgr.queue("vm_instance", q, "Async-job", i+1, 1);

        count = 0;
        Thread thread1 = new Thread(new Runnable() {
            @Override
            public void run() {
                while(count < totalRuns*queues) {
                    List<SyncQueueItemVO> l = mgr.dequeueFromAny(1L, itemsPerRun);
                    if(l != null && l.size() > 0) {
                        s_logger.info("Thread 1 get " + l.size() + " dequeued items");

                        for(SyncQueueItemVO item : l) {
                            s_logger.info("Thread 1 process item: " + item.toString());
                            count++;

                            mgr.purgeItem(item.getId());
                        }
                    }
                    try {
                        Thread.sleep(100);
                    } catch (InterruptedException e) {
                    }
                }
            }
        }
                );

        Thread thread2 = new Thread(new Runnable() {
            @Override
            public void run() {
                while(count < totalRuns*queues) {
                    List<SyncQueueItemVO> l = mgr.dequeueFromAny(1L, itemsPerRun);
                    if(l != null && l.size() > 0) {
                        s_logger.info("Thread 2 get " + l.size() + " dequeued items");

                        for(SyncQueueItemVO item : l) {
                            s_logger.info("Thread 2 process item: " + item.toString());
                            count++;
                            mgr.purgeItem(item.getId());
                        }
                    }

                    try {
                        Thread.sleep(100);
                    } catch (InterruptedException e) {
                    }
                }
            }
        }
                ); 

        thread1.start();
        thread2.start();
        try {
            thread1.join();
        } catch (InterruptedException e) {
        }
        try {
            thread2.join();
        } catch (InterruptedException e) {
        }
        Assert.assertEquals(queues*totalRuns, count);
    }

    public void testPopulateQueueData() {
        final int queues = 30000;
        final int totalRuns = 100;

        for(int q = 1; q <= queues; q++)
            for(int i = 0; i < totalRuns; i++)
                mgr.queue("vm_instance", q, "Async-job", i+1, 1);
    }

    public void testSyncQueue() {

        mgr.queue("vm_instance", 1, "Async-job", 1, 1);
        mgr.queue("vm_instance", 1, "Async-job", 2, 1);
        mgr.queue("vm_instance", 1, "Async-job", 3, 1);
        mgr.dequeueFromAny(100L, 1);

        List<SyncQueueItemVO> l = mgr.getBlockedQueueItems(100000, false);
        for(SyncQueueItemVO item : l) {
            System.out.println("Blocked item. " + item.getContentType() + "-" + item.getContentId());
            mgr.purgeItem(item.getId());
        }
    }
}