ʻOrg.apache.http.client` Make an HTTP request from an HTTP client generated using I want to retry depending on the returned HTTP status (200, 404, 503, etc.) There is a time to say, and the solution at that time.
(The project member told me that it was hard to write the version, so I will write the working version for the time being.)
It has been confirmed to work in the environment using!
Instead of a memorandum, hoping that someday it will help someone.
RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(timeout).build();
final HttpClientBuilder hcBuilder = HttpClientBuilder.create()
.setDefaultRequestConfig(requestConfig)
//Retry when HTTP IO error occurs
.setRetryHandler(new DefaultHttpRequestRetryHandler())
//Whether to retry or not depends on the boolean value of retryRequest at the time of HTTP request
.setServiceUnavailableRetryStrategy(new ServiceUnavailableRetryStrategy() {
@Override
public boolean retryRequest(
final HttpResponse response, final int executionCount, final HttpContext context) {
int statusCode = response.getStatusLine().getStatusCode();
return Arrays.asList(RETRY_HTTP_STATUSES).contains(statusCode)
&& executionCount < MAX_RETRY_COUNT;
}
@Override
public long getRetryInterval() {
return RETRY_INTERVAL_MILLI_SEC;
}
});
return hcBuilder.build();
Needless to say, but if you supplement
-RETRY_HTTP_STATUSES is an array of ʻInteger type, and define the HTTP status code group that you want to retry.
-MAX_RETRY_COUNT defines a maximum number of retries.
· RETRY_INTERVAL_MILL_SEC defines the millisecond of the retry interval.
Now even a copy / paste programmer can write a retry process!
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