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FeignRibbonClientAutoConfiguration.java
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FeignRibbonClientAutoConfiguration.java
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/*
* 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.feign.ribbon;
import org.apache.http.client.HttpClient;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.conn.HttpClientConnectionManager;
import org.apache.http.impl.client.CloseableHttpClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.AutoConfigureBefore;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.cloud.client.loadbalancer.LoadBalancedRetryPolicyFactory;
import org.springframework.cloud.commons.httpclient.ApacheHttpClientConnectionManagerFactory;
import org.springframework.cloud.commons.httpclient.ApacheHttpClientFactory;
import org.springframework.cloud.netflix.feign.FeignAutoConfiguration;
import org.springframework.cloud.netflix.feign.support.FeignHttpClientProperties;
import org.springframework.cloud.netflix.ribbon.SpringClientFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import com.netflix.loadbalancer.ILoadBalancer;
import feign.Client;
import feign.Feign;
import feign.Request;
import feign.httpclient.ApacheHttpClient;
import feign.okhttp.OkHttpClient;
import java.util.Timer;
import java.util.TimerTask;
import javax.annotation.PreDestroy;
/**
* Autoconfiguration to be activated if Feign is in use and needs to be use Ribbon as a
* load balancer.
*
* @author Dave Syer
*/
@ConditionalOnClass({ ILoadBalancer.class, Feign.class })
@Configuration
@AutoConfigureBefore(FeignAutoConfiguration.class)
@EnableConfigurationProperties({FeignHttpClientProperties.class})
public class FeignRibbonClientAutoConfiguration {
@Bean
@Primary
@ConditionalOnMissingClass("org.springframework.retry.support.RetryTemplate")
public CachingSpringLoadBalancerFactory cachingLBClientFactory(
SpringClientFactory factory) {
return new CachingSpringLoadBalancerFactory(factory);
}
@Bean
@Primary
@ConditionalOnClass(name = "org.springframework.retry.support.RetryTemplate")
public CachingSpringLoadBalancerFactory retryabeCachingLBClientFactory(
SpringClientFactory factory, LoadBalancedRetryPolicyFactory retryPolicyFactory) {
return new CachingSpringLoadBalancerFactory(factory, retryPolicyFactory, true);
}
@Bean
@ConditionalOnMissingBean
public Client feignClient(CachingSpringLoadBalancerFactory cachingFactory,
SpringClientFactory clientFactory) {
return new LoadBalancerFeignClient(new Client.Default(null, null),
cachingFactory, clientFactory);
}
@Bean
@ConditionalOnMissingBean
public Request.Options feignRequestOptions() {
return LoadBalancerFeignClient.DEFAULT_OPTIONS;
}
@Configuration
@ConditionalOnClass(ApacheHttpClient.class)
@ConditionalOnProperty(value = "feign.httpclient.enabled", matchIfMissing = true)
protected static class HttpClientFeignLoadBalancedConfiguration {
private final Timer connectionManagerTimer = new Timer(
"FeignApacheHttpClientConfiguration.connectionManagerTimer", true);
private CloseableHttpClient httpClient;
@Autowired(required = false)
private RegistryBuilder registryBuilder;
@Bean
public HttpClientConnectionManager connectionManager(ApacheHttpClientConnectionManagerFactory connectionManagerFactory,
FeignHttpClientProperties httpClientProperties) {
final HttpClientConnectionManager connectionManager = connectionManagerFactory.newConnectionManager(false, httpClientProperties.getMaxConnections(),
httpClientProperties.getMaxConnectionsPerRoute(), httpClientProperties.getTimeToLive(),
httpClientProperties.getTimeToLiveUnit(),
registryBuilder);
this.connectionManagerTimer.schedule(new TimerTask() {
@Override
public void run() {
connectionManager.closeExpiredConnections();
}
}, 30000, httpClientProperties.getConnectionTimerRepeat());
return connectionManager;
}
@Bean
public CloseableHttpClient httpClient(ApacheHttpClientFactory httpClientFactory, HttpClientConnectionManager httpClientConnectionManager,
FeignHttpClientProperties httpClientProperties) {
RequestConfig defaultRequestConfig = RequestConfig.custom().
setConnectTimeout(httpClientProperties.getConnectionTimeout()).
setRedirectsEnabled(httpClientProperties.isFollowRedirects()).
build();
this.httpClient = httpClientFactory.createClient(defaultRequestConfig, httpClientConnectionManager);
return this.httpClient;
}
@Bean
@ConditionalOnMissingBean(Client.class)
public Client feignClient(CachingSpringLoadBalancerFactory cachingFactory,
SpringClientFactory clientFactory, HttpClient httpClient) {
ApacheHttpClient delegate = new ApacheHttpClient(httpClient);
return new LoadBalancerFeignClient(delegate, cachingFactory, clientFactory);
}
@PreDestroy
public void destroy() throws Exception {
connectionManagerTimer.cancel();
httpClient.close();
}
}
@Configuration
@ConditionalOnClass(OkHttpClient.class)
@ConditionalOnProperty(value = "feign.okhttp.enabled", matchIfMissing = true)
protected static class OkHttpFeignLoadBalancedConfiguration {
@Autowired(required = false)
private okhttp3.OkHttpClient okHttpClient;
@Bean
@ConditionalOnMissingBean(Client.class)
public Client feignClient(CachingSpringLoadBalancerFactory cachingFactory,
SpringClientFactory clientFactory) {
OkHttpClient delegate;
if (this.okHttpClient != null) {
delegate = new OkHttpClient(this.okHttpClient);
}
else {
delegate = new OkHttpClient();
}
return new LoadBalancerFeignClient(delegate, cachingFactory, clientFactory);
}
}
}