RestTemplate 連接池配置
RestTemplate是Spring提供的用於訪問Rest服務的客戶端,RestTemplate提供了多種便捷訪問遠程Http服務的方法,能夠大大提高客戶端的編寫效率。
RestTemplate的默認連接池是 SimpleClientHttpRequestFactory
。
自定義連接池如下所示
配置文件類
/**
* RestTemplate 客戶端 Httpclient 的線程池配置
*
* @author fengxuechao
* @version 0.1
* @date 2019/11/12
*/
@ConfigurationProperties(prefix = "http-pool")
@Data
public class HttpPoolProperties {
/**
* 最大線程數
*/
private Integer maxTotal = 20;
/**
* 默認線程數
*/
private Integer defaultMaxPerRoute = 10;
/**
* 連接上服務器(握手成功)的時間
*/
private Integer connectTimeout = 1000;
/**
* 從連接池中獲取連接的超時時間
*/
private Integer connectionRequestTimeout = 3000;
/**
* 服務器返回數據(response)的時間
*/
private Integer socketTimeout = 5000;
/**
* 用於校驗線程空閒的時間
*/
private Integer validateAfterInactivity = 7000;
/**
* 開啓異步線程池
*/
private Boolean async = false;
}
連接池配置類
忽略SSL
/**
* @author fengxuechao
* @version 0.1
* @date 2019/12/17
*/
@Slf4j
@Component
public class HttpClientHelper {
public SSLContext getSslContext() {
// 在調用SSL之前需要重寫驗證方法,取消檢測SSL
X509TrustManager trustManager = new X509TrustManager() {
@Override
public X509Certificate[] getAcceptedIssuers() {
return null;
}
@Override
public void checkClientTrusted(X509Certificate[] xcs, String str) {
}
@Override
public void checkServerTrusted(X509Certificate[] xcs, String str) {
}
};
SSLContext ctx = null;
try {
ctx = SSLContext.getInstance(SSLConnectionSocketFactory.TLS);
ctx.init(null, new TrustManager[]{trustManager}, null);
} catch (NoSuchAlgorithmException | KeyManagementException e) {
log.error("創建 SSL 失敗", e);
}
assert ctx != null;
return ctx;
}
}
配置類
/**
* HttpClient 的配置
*
* @author fengxuechao
* @version 0.1
* @date 2019/11/12
*/
@Slf4j
@Configuration
@ConditionalOnClass({HttpClient.class})
@EnableConfigurationProperties(HttpPoolProperties.class)
public class HttpClientConfig {
@Autowired
private HttpPoolProperties httpPoolProperties;
@Autowired
private HttpClientHelper helper;
@Bean("httpRequestFactory")
@ConditionalOnMissingBean
public ClientHttpRequestFactory httpRequestFactory() {
return new HttpComponentsClientHttpRequestFactory(httpClient());
}
@Bean("httpClient")
@ConditionalOnMissingBean
public HttpClient httpClient() {
// 在調用SSL之前需要重寫驗證方法,取消檢測SSL
X509TrustManager trustManager = new X509TrustManager() {
@Override public X509Certificate[] getAcceptedIssuers() {
return null;
}
@Override public void checkClientTrusted(X509Certificate[] xcs, String str) {}
@Override public void checkServerTrusted(X509Certificate[] xcs, String str) {}
};
SSLConnectionSocketFactory socketFactory = null;
try {
SSLContext ctx = helper.getSslContext();
ctx.init(null, new TrustManager[] { trustManager }, null);
socketFactory = new SSLConnectionSocketFactory(ctx, NoopHostnameVerifier.INSTANCE);
} catch (KeyManagementException e) {
log.error("創建 SSL 失敗", e);
}
assert socketFactory != null;
Registry<ConnectionSocketFactory> registry = RegistryBuilder.<ConnectionSocketFactory>create()
.register("http", PlainConnectionSocketFactory.getSocketFactory())
.register("https", socketFactory)
.build();
PoolingHttpClientConnectionManager connectionManager = new PoolingHttpClientConnectionManager(registry);
connectionManager.setMaxTotal(httpPoolProperties.getMaxTotal());
connectionManager.setDefaultMaxPerRoute(httpPoolProperties.getDefaultMaxPerRoute());
connectionManager.setValidateAfterInactivity(httpPoolProperties.getValidateAfterInactivity());
RequestConfig requestConfig = RequestConfig.custom()
//服務器返回數據(response)的時間,超過拋出read timeout
.setSocketTimeout(httpPoolProperties.getSocketTimeout())
//連接上服務器(握手成功)的時間,超出拋出connect timeout
.setConnectTimeout(httpPoolProperties.getConnectTimeout())
//從連接池中獲取連接的超時時間,超時間未拿到可用連接,會拋出org.apache.http.conn.ConnectionPoolTimeoutException: Timeout waiting for connection from pool
.setConnectionRequestTimeout(httpPoolProperties.getConnectionRequestTimeout())
.build();
return HttpClientBuilder.create()
.setDefaultRequestConfig(requestConfig)
.setConnectionManager(connectionManager)
.build();
}
}
RestTemplate 配置
/**
* @author fengxuechao
* @version 0.1
* @date 2019/11/12
*/
@Configuration
@Import({HttpClientConfig.class})
public class RestTemplateConfiguration {
/**
* 普通的 RestTemplate
*
* @return
*/
@Bean("restTemplate")
@ConditionalOnMissingBean
@ConditionalOnBean(value = ClientHttpRequestFactory.class)
public RestTemplate restTemplate(ClientHttpRequestFactory httpRequestFactory) {
RestTemplate restTemplate = new RestTemplate(httpRequestFactory);
restTemplate.getMessageConverters().set(1, new StringHttpMessageConverter(StandardCharsets.UTF_8));
return restTemplate;
}
}