/**
* Responsible for handling an error response, including unmarshalling the error response into the
* most specific exception type possible, and throwing the exception.
*
* @param request The request that generated the error response being handled.
* @param errorResponseHandler The response handler responsible for unmarshalling the error
* response.
* @param method The HTTP method containing the actual response content.
* @throws IOException If any problems are encountering reading the error response.
*/
private AmazonServiceException handleErrorResponse(
Request<?> request,
HttpResponseHandler<AmazonServiceException> errorResponseHandler,
HttpRequestBase method,
org.apache.http.HttpResponse apacheHttpResponse)
throws IOException {
int status = apacheHttpResponse.getStatusLine().getStatusCode();
HttpResponse response = createResponse(method, request, apacheHttpResponse);
if (errorResponseHandler.needsConnectionLeftOpen()
&& method instanceof HttpEntityEnclosingRequestBase) {
HttpEntityEnclosingRequestBase entityEnclosingRequest =
(HttpEntityEnclosingRequestBase) method;
response.setContent(new HttpMethodReleaseInputStream(entityEnclosingRequest));
}
AmazonServiceException exception = null;
try {
exception = errorResponseHandler.handle(response);
requestLog.debug("Received error response: " + exception.toString());
} catch (Exception e) {
// If the errorResponseHandler doesn't work, then check for error
// responses that don't have any content
if (status == 413) {
exception = new AmazonServiceException("Request entity too large");
exception.setServiceName(request.getServiceName());
exception.setStatusCode(413);
exception.setErrorType(ErrorType.Client);
exception.setErrorCode("Request entity too large");
} else if (status == 503
&& "Service Unavailable"
.equalsIgnoreCase(apacheHttpResponse.getStatusLine().getReasonPhrase())) {
exception = new AmazonServiceException("Service unavailable");
exception.setServiceName(request.getServiceName());
exception.setStatusCode(503);
exception.setErrorType(ErrorType.Service);
exception.setErrorCode("Service unavailable");
} else if (e instanceof IOException) {
throw (IOException) e;
} else {
String errorMessage =
"Unable to unmarshall error response ("
+ e.getMessage()
+ "). Response Code: "
+ status
+ ", Response Text: "
+ apacheHttpResponse.getStatusLine().getReasonPhrase();
throw new AmazonClientException(errorMessage, e);
}
}
exception.setStatusCode(status);
exception.setServiceName(request.getServiceName());
exception.fillInStackTrace();
return exception;
}
@Override
public AmazonServiceException handle(HttpResponse response) throws Exception {
JsonErrorResponse error;
try {
error = JsonErrorResponse.fromResponse(response);
} catch (IOException e) {
throw new AmazonClientException("Unable to parse error response", e);
}
AmazonServiceException ase = runErrorUnmarshallers(error);
if (ase == null) return null;
ase.setStatusCode(response.getStatusCode());
if (response.getStatusCode() < 500) {
ase.setErrorType(ErrorType.Client);
} else {
ase.setErrorType(ErrorType.Service);
}
ase.setErrorCode(error.getErrorCode());
for (Entry<String, String> headerEntry : response.getHeaders().entrySet()) {
if (headerEntry.getKey().equalsIgnoreCase("X-Amzn-RequestId")) {
ase.setRequestId(headerEntry.getValue());
}
}
return ase;
}
@Override
public AmazonServiceException handle(com.amazonaws.http.HttpResponse response)
throws Exception {
AmazonServiceException ase = new AmazonServiceException("Fake service exception.");
ase.setStatusCode(response.getStatusCode());
ase.setErrorCode(response.getStatusText());
return ase;
}
@Test
@SuppressWarnings("unchecked")
public void testDoWithRetry_ThrottleException() throws Exception {
AmazonElasticMapReduceCustomClient client =
new AmazonElasticMapReduceCustomClient("dummy", "dummy");
client.setRequestInterval(100);
Callable callable = mock(Callable.class);
AmazonServiceException exception = new AmazonServiceException("Rate exceeded");
exception.setErrorCode("Throttling");
exception.setStatusCode(400);
when(callable.call()).thenThrow(exception, exception, exception).thenReturn(new Object());
long startTime = System.currentTimeMillis();
Object result = client.doThrottleSafe(callable);
assertNotNull(result);
assertThat(
(System.currentTimeMillis() - startTime),
greaterThanOrEqualTo(3 * client.getRequestInterval()));
}
