/*
* Copyright 2013-2015 the original author or authors.
*
* 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
*
* 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 org.springframework.cloud.netflix.hystrix.stream;
import javax.annotation.PostConstruct;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.cloud.client.actuator.HasFeatures;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.cloud.stream.annotation.EnableBinding;
import org.springframework.cloud.stream.annotation.Output;
import org.springframework.cloud.stream.config.BindingProperties;
import org.springframework.cloud.stream.config.ChannelBindingServiceProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.messaging.MessageChannel;
import org.springframework.scheduling.annotation.EnableScheduling;
import com.netflix.hystrix.HystrixCircuitBreaker;
/**
* Autoconfiguration for a Spring Cloud Hystrix on Spring Cloud Stream. Enabled by default
* if spring-cloud-stream is on the classpath, and can be switched off with
* <code>hystrix.stream.queue.enabled</code>. There are some high level configuration
* options in {@link HystrixStreamProperties}. The binding name for Spring Cloud Stream is
* {@link HystrixStreamClient#OUTPUT} so you can configure stream other properties through
* that.
*
* @author Spencer Gibb
* @author Dave Syer
*/
@Configuration
@ConditionalOnClass({ HystrixCircuitBreaker.class, EnableBinding.class })
@ConditionalOnProperty(value = "hystrix.stream.queue.enabled", matchIfMissing = true)
@EnableConfigurationProperties
@EnableScheduling
@EnableBinding(HystrixStreamClient.class)
public class HystrixStreamAutoConfiguration {
@Autowired
private ChannelBindingServiceProperties bindings;
@Autowired
private HystrixStreamProperties properties;
@Autowired
@Output(HystrixStreamClient.OUTPUT)
private MessageChannel outboundChannel;
@Bean
public HasFeatures hystrixStreamQueueFeature() {
return HasFeatures.namedFeature("Hystrix Stream (Queue)",
HystrixStreamAutoConfiguration.class);
}
@PostConstruct
public void init() {
BindingProperties outputBinding = this.bindings.getBindings()
.get(HystrixStreamClient.OUTPUT);
if (outputBinding == null) {
this.bindings.getBindings().put(HystrixStreamClient.OUTPUT,
new BindingProperties());
}
BindingProperties output = this.bindings.getBindings()
.get(HystrixStreamClient.OUTPUT);
if (output.getDestination() == null) {
output.setDestination(this.properties.getDestination());
}
if (output.getContentType() == null) {
output.setContentType(this.properties.getContentType());
}
}
@Bean
public HystrixStreamProperties hystrixStreamProperties() {
return new HystrixStreamProperties();
}
@Bean
public HystrixStreamTask hystrixStreamTask(DiscoveryClient discoveryClient) {
return new HystrixStreamTask(this.outboundChannel, discoveryClient, this.properties);
}
}