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RestTemplateConfig

package com.newland.iot.config;import org.apache.http.client.HttpClient;import org.apache.http.impl.client.DefaultConnectionKeepAliveStrategy;import org.apache.http.impl.client.DefaultHttpRequestRetryHandler;import org.apache.http.impl.client.HttpClientBuilder;import org.apache.http.impl.client.HttpClients;import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;import org.springframework.cloud.client.loadbalancer.LoadBalanced;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import org.springframework.http.client.ClientHttpRequestFactory;import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;import org.springframework.web.client.RestTemplate;import java.util.concurrent.TimeUnit;@Configurationpublic class RestTemplateConfig {	@Bean	@LoadBalanced	public RestTemplate restTemplate() {		RestTemplate restTemplate = new RestTemplate(RestTemplateConfig.newClientHttpRequestFactory());	return restTemplate;	}	/**	 * 自定义RestTemplate配置	 * 1、设置最大连接数	 * 2、设置路由并发数	 * 3、设置重试次数	 * @author Hux	 * @return	 */	public static ClientHttpRequestFactory newClientHttpRequestFactory() {				// 长连接保持时长30秒		PoolingHttpClientConnectionManager pollingConnectionManager = new PoolingHttpClientConnectionManager(				30, TimeUnit.SECONDS);		// 最大连接数		pollingConnectionManager.setMaxTotal(3000);		// 单路由的并发数		pollingConnectionManager.setDefaultMaxPerRoute(100);		HttpClientBuilder httpClientBuilder = HttpClients.custom();		httpClientBuilder.setConnectionManager(pollingConnectionManager);		// 重试次数2次，并开启		httpClientBuilder.setRetryHandler(new DefaultHttpRequestRetryHandler(2,				true));		// 保持长连接配置，需要在头添加Keep-Alive		httpClientBuilder				.setKeepAliveStrategy(new DefaultConnectionKeepAliveStrategy());		HttpClient httpClient = httpClientBuilder.build();		// httpClient连接底层配置clientHttpRequestFactory		HttpComponentsClientHttpRequestFactory clientHttpRequestFactory =		new HttpComponentsClientHttpRequestFactory(httpClient);		clientHttpRequestFactory.setReadTimeout(5000);// ms		clientHttpRequestFactory.setConnectTimeout(15000);//		return clientHttpRequestFactory;	}}

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