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Asynchronous and scheduled task executor
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/*
 * Copyright (c) 2020-2023 Sonu Kumar
 *
 * 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
 *
 *     https://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.github.sonus21.rqueue.config;

import com.github.sonus21.rqueue.utils.Constants;
import lombok.Getter;
import lombok.Setter;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.listener.RedisMessageListenerContainer;

@Configuration
@Getter
@Setter
public class RqueueSchedulerConfig {

  /**
   * Whether scheduling feature is enabled or not. This can be used to control different servers
   * where on a server only scheduler is running, while on other only workers are running.
   */
  @Value("${rqueue.scheduler.enabled:true}")
  private boolean enabled;

  /**
   * This is used to control whether same redis {@link RedisMessageListenerContainer} would be used
   * or new one should be created, this must be set to true when using two different connection for
   * Rqueue and application Redis.
   */
  @Value("${rqueue.scheduler.listener.shared:true}")
  private boolean listenerShared;

  /**
   * This is used to control message scheduler auto start feature, if it's disabled then messages
   * are moved only when a message is received from Redis PUB/SUB channel.
   */
  @Value("${rqueue.scheduler.auto.start:true}")
  private boolean autoStart;

  /**
   * This is used to control message scheduler redis pub/sub interaction, this can be used to
   * completely disable the redis PUB/SUB interaction
   */
  @Value("${rqueue.scheduler.redis.enabled:true}")
  private boolean redisEnabled;

  // Number of threads used to process scheduled-queue messages
  @Value("${rqueue.scheduler.scheduled.message.thread.pool.size:3}")
  private int scheduledMessageThreadPoolSize;

  //  Number of threads used to process processing-queue messages
  @Value("${rqueue.scheduler.processing.message.thread.pool.size:1}")
  private int processingMessageThreadPoolSize;

  // How frequently messages should be moved from scheduled queues to source queue
  @Value("${rqueue.scheduler.scheduled.message.time.interval:2000}")
  private long scheduledMessageTimeIntervalInMilli;

  // How long the application should wait for task termination
  @Value("${rqueue.scheduler.termination.wait.time:200}")
  private long terminationWaitTime;

  // Maximum delay for message mover task due to failure
  @Value("${rqueue.scheduler.max.message.mover.delay:60000}")
  private long maxMessageMoverDelay;

  // Minimum amount of time between two consecutive message move calls
  @Value("${rqueue.scheduler.min.message.mover.delay:100}")
  private long minMessageMoverDelay;

  // Maximum number of messages that should be copied from scheduled to normal queue
  @Value("${rqueue.scheduler.max.message.count:100}")
  private long maxMessageCount;

  public long minMessageMoveDelay() {
    if (minMessageMoverDelay <= 0) {
      return Constants.MIN_SCHEDULE_INTERVAL;
    }
    return minMessageMoverDelay;
  }
}