alpha/alpha-fsm/src/main/java/org/apache/servicecomb/pack/alpha/fsm/FsmAutoConfiguration.java

/*
 * 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.
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package org.apache.servicecomb.pack.alpha.fsm;

import static org.apache.servicecomb.pack.alpha.fsm.spring.integration.akka.SpringAkkaExtension.SPRING_EXTENSION_PROVIDER;

import akka.actor.ActorSystem;
import com.typesafe.config.Config;
import com.typesafe.config.ConfigFactory;
import java.util.Map;
import org.apache.servicecomb.pack.alpha.fsm.channel.ActiveMQActorEventChannel;
import org.apache.servicecomb.pack.alpha.fsm.sink.ActorEventSink;
import org.apache.servicecomb.pack.alpha.fsm.channel.ActorEventChannel;
import org.apache.servicecomb.pack.alpha.fsm.channel.KafkaActorEventChannel;
import org.apache.servicecomb.pack.alpha.fsm.channel.MemoryActorEventChannel;
import org.apache.servicecomb.pack.alpha.fsm.channel.RedisActorEventChannel;
import org.apache.servicecomb.pack.alpha.fsm.sink.SagaActorEventSender;
import org.apache.servicecomb.pack.alpha.fsm.spring.integration.akka.AkkaConfigPropertyAdapter;
import org.apache.servicecomb.pack.alpha.fsm.spring.integration.eventbus.EventSubscribeBeanPostProcessor;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.env.ConfigurableEnvironment;

@Configuration
@ConditionalOnProperty(value = {"alpha.feature.akka.enabled"})
public class FsmAutoConfiguration {

  @Value("${alpha.feature.akka.channel.memory.size:-1}")
  int memoryEventChannelMemorySize;

  @Bean
  public ActorSystem actorSystem(ConfigurableApplicationContext applicationContext, ConfigurableEnvironment environment) {
    ActorSystem system = ActorSystem.create("alpha-akka", akkaConfiguration(applicationContext,environment));
    SPRING_EXTENSION_PROVIDER.get(system).initialize(applicationContext);
    return system;
  }

  @Bean
  public Config akkaConfiguration(ConfigurableApplicationContext applicationContext, ConfigurableEnvironment environment) {
    final Map<String, Object> converted = AkkaConfigPropertyAdapter.getPropertyMap(environment);
    return ConfigFactory.parseMap(converted).withFallback(ConfigFactory.defaultReference(applicationContext.getClassLoader()));
  }

  @Bean
  public EventSubscribeBeanPostProcessor eventSubscribeBeanPostProcessor(){
    return new EventSubscribeBeanPostProcessor();
  }

  @Bean
  public ActorEventSink actorEventSink(){
    return new SagaActorEventSender();
  }

  @Bean
  @ConditionalOnMissingBean(ActorEventChannel.class)
  @ConditionalOnProperty(value = "alpha.feature.akka.channel.type", havingValue = "memory", matchIfMissing = true)
  public ActorEventChannel memoryEventChannel(ActorEventSink actorEventSink){
    return new MemoryActorEventChannel(actorEventSink, memoryEventChannelMemorySize);
  }

  @Bean
  @ConditionalOnProperty(value = "alpha.feature.akka.channel.type", havingValue = "activemq")
  public ActorEventChannel activeMqEventChannel(ActorEventSink actorEventSink){
    return new ActiveMQActorEventChannel(actorEventSink);
  }

  @Bean
  @ConditionalOnProperty(value = "alpha.feature.akka.channel.type", havingValue = "kafka")
  public ActorEventChannel kafkaEventChannel(ActorEventSink actorEventSink){
    return new KafkaActorEventChannel(actorEventSink);
  }

  @Bean
  @ConditionalOnProperty(value = "alpha.feature.akka.channel.type", havingValue = "redis")
  public ActorEventChannel redisEventChannel(ActorEventSink actorEventSink){
    return new RedisActorEventChannel(actorEventSink);
  }

}