RestTemplate connection pool setting

You can set the connection pool to restTemplate by using connection manager.


- Configuration

package org.blog.test;

import lombok.extern.slf4j.Slf4j;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.web.client.RestTemplate;

@SpringBootApplication
@Slf4j
public class RestTemplateApplication {
    public static void main(String[] args) {
        SpringApplication.run(RestTemplateApplication.class, args);
    }

    @Bean
    public RestTemplate restTemplate() {
        return new RestTemplate() {{
            setRequestFactory(new HttpComponentsClientHttpRequestFactory(HttpClientBuilder
                    .create()
                    .setConnectionManager(new PoolingHttpClientConnectionManager() {{
                        setDefaultMaxPerRoute(20);
                        setMaxTotal(200);
                    }}).build()));
        }};
    }
}