/**
* Handles a successful response from a service call by unmarshalling the results using the
* specified response handler.
*
* @param <T> The type of object expected in the response.
* @param request The original request that generated the response being handled.
* @param responseHandler The response unmarshaller used to interpret the contents of the
* response.
* @param method The HTTP method that was invoked, and contains the contents of the response.
* @param executionContext Extra state information about the request currently being executed.
* @return The contents of the response, unmarshalled using the specified response handler.
* @throws IOException If any problems were encountered reading the response contents from the
* HTTP method object.
*/
private <T> T handleResponse(
Request<?> request,
HttpResponseHandler<AmazonWebServiceResponse<T>> responseHandler,
HttpRequestBase method,
org.apache.http.HttpResponse apacheHttpResponse,
ExecutionContext executionContext)
throws IOException {
HttpResponse httpResponse = createResponse(method, request, apacheHttpResponse);
if (responseHandler.needsConnectionLeftOpen() && method instanceof HttpEntityEnclosingRequest) {
HttpEntityEnclosingRequest httpEntityEnclosingRequest = (HttpEntityEnclosingRequest) method;
httpResponse.setContent(new HttpMethodReleaseInputStream(httpEntityEnclosingRequest));
}
try {
CountingInputStream countingInputStream = null;
if (System.getProperty(PROFILING_SYSTEM_PROPERTY) != null) {
countingInputStream = new CountingInputStream(httpResponse.getContent());
httpResponse.setContent(countingInputStream);
}
long startTime = System.currentTimeMillis();
AmazonWebServiceResponse<? extends T> awsResponse = responseHandler.handle(httpResponse);
long endTime = System.currentTimeMillis();
if (System.getProperty(PROFILING_SYSTEM_PROPERTY) != null) {
if (executionContext.getTimingInfo() != null) {
TimingInfo timingInfo = executionContext.getTimingInfo();
TimingInfo responseProcessingTiming = new TimingInfo(startTime, endTime);
timingInfo.addSubMeasurement(
RESPONSE_PROCESSING_SUBMEASUREMENT, responseProcessingTiming);
if (countingInputStream != null) {
responseProcessingTiming.addCounter(
BYTES_PROCESSED_COUNTER, countingInputStream.getByteCount());
}
}
}
if (awsResponse == null) throw new RuntimeException("Unable to unmarshall response metadata");
responseMetadataCache.add(request.getOriginalRequest(), awsResponse.getResponseMetadata());
if (requestLog.isDebugEnabled()) {
requestLog.debug(
"Received successful response: "
+ apacheHttpResponse.getStatusLine().getStatusCode()
+ ", AWS Request ID: "
+ awsResponse.getRequestId());
}
return awsResponse.getResult();
} catch (Exception e) {
String errorMessage = "Unable to unmarshall response (" + e.getMessage() + ")";
log.warn(errorMessage, e);
throw new AmazonClientException(errorMessage, e);
}
}
/**
* Executes the request and returns the result.
*
* @param request The AmazonWebServices request to send to the remote server
* @param responseHandler A response handler to accept a successful response from the remote
* server
* @param errorResponseHandler A response handler to accept an unsuccessful response from the
* remote server
* @param executionContext Additional information about the context of this web service call
*/
public <T> T execute(
Request<?> request,
HttpResponseHandler<AmazonWebServiceResponse<T>> responseHandler,
HttpResponseHandler<AmazonServiceException> errorResponseHandler,
ExecutionContext executionContext)
throws AmazonClientException, AmazonServiceException {
long startTime = System.currentTimeMillis();
if (executionContext == null)
throw new AmazonClientException(
"Internal SDK Error: No execution context parameter specified.");
List<RequestHandler> requestHandlers = executionContext.getRequestHandlers();
if (requestHandlers == null) requestHandlers = new ArrayList<RequestHandler>();
// Apply any additional service specific request handlers that need to be run
for (RequestHandler requestHandler : requestHandlers) {
requestHandler.beforeRequest(request);
}
try {
TimingInfo timingInfo = new TimingInfo(startTime);
executionContext.setTimingInfo(timingInfo);
T t = executeHelper(request, responseHandler, errorResponseHandler, executionContext);
timingInfo.setEndTime(System.currentTimeMillis());
for (RequestHandler handler : requestHandlers) {
try {
handler.afterResponse(request, t, timingInfo);
} catch (ClassCastException cce) {
}
}
return t;
} catch (AmazonClientException e) {
for (RequestHandler handler : requestHandlers) {
handler.afterError(request, e);
}
throw e;
}
}
