在理解RestTemplate如何处理超时方面存在问题。
我将RestTemplate
配置为Bean
,如下所示:
@Bean
public RestTemplate rest(final RestTemplateBuilder builder) {
final RestTemplate restTemplate = new RestTemplate(getClientHttpRequestFactory());
return restTemplate;
}
private ClientHttpRequestFactory getClientHttpRequestFactory() {
final int timeout = 50000;
final RequestConfig config = RequestConfig.custom().setConnectTimeout(timeout).setConnectionRequestTimeout(timeout).setSocketTimeout(timeout).build();
final CloseableHttpClient client = HttpClientBuilder.create().setDefaultRequestConfig(config).build();
return new HttpComponentsClientHttpRequestFactory(client);
}
50000只是一个学术价值。
我在RestTemplate
包装的服务连接器中使用Hystrix
:
@HystrixCommand(commandProperties = { @HystrixProperty(name = "execution.isolation.strategy", value = "SEMAPHORE") }, fallbackMethod = "fallbackActivityCall")
public Optional<ResponseActivityValue> callForActivity() {
final StringBuilder urlBuilder = new StringBuilder(accessConfig.getTracking().getUrl());
final HttpEntity<String> entity = new HttpEntity<>(buildAuthHeader());
final ResponseEntity<ResponseActivityValue> re = restTemplate.exchange(urlBuilder.toString(), HttpMethod.GET, entity, ResponseActivityValue.class);
final HttpStatus code = re.getStatusCode();
return Optional.ofNullable(re.getBody());
}
我使用停止通话的服务对其进行了测试。该方法将在3秒后返回,而不是预期的50000。我在te RestTemplate
中配置哪个值都没有关系,它总是在3秒后返回。
有人有主意吗?
答案 0 :(得分:1)
您可以直接使用RestTemplateBuilder构建器来构建您的Rest Template实例:如下
.h
并尝试在const
@Bean
public RestTemplate rest(final RestTemplateBuilder builder) {
return builder
.setConnectTimeout(50000)
.setReadTimeout(50000)
.build()
}
或直接在命令中(application.properties
)
hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds=50000