Examples with DefaultScatterGatherStrategy com.linkedin.restli.client.DefaultScatterGatherStrategy used on opensource projects

Example 1 with DefaultScatterGatherStrategy

use of com.linkedin.restli.client.DefaultScatterGatherStrategy in project rest.li by linkedin.

the class LatencyInstrumentationResource method create.

/**
 * This is the "upstream endpoint" which is queried directly by the integration test.
 * This endpoint makes a call to {@link #batchPartialUpdate(BatchPatchRequest)} (the "downstream endpoint"),
 * then packs all the client-side timing data into the original server-side request context.
 */
@ReturnEntity
@RestMethod.Create
public CreateKVResponse<Long, InstrumentationControl> create(InstrumentationControl control) {
    final boolean forceException = control.isForceException();
    final boolean useScatterGather = control.isUseScatterGather();
    final String uriPrefix = control.getServiceUriPrefix();
    // Build the downstream request
    final BatchPartialUpdateEntityRequestBuilder<Long, InstrumentationControl> builder = new LatencyInstrumentationBuilders().batchPartialUpdateAndGet();
    final PatchRequest<InstrumentationControl> patch = PatchGenerator.diffEmpty(control);
    for (long i = 0; i < DOWNSTREAM_BATCH_SIZE; i++) {
        builder.input(i, patch);
    }
    final BatchPartialUpdateEntityRequest<Long, InstrumentationControl> request = builder.build();
    // Set up the Rest.li client config
    final RestLiClientConfig clientConfig = new RestLiClientConfig();
    clientConfig.setUseStreaming(control.isUseStreaming());
    if (useScatterGather) {
        clientConfig.setScatterGatherStrategy(new DefaultScatterGatherStrategy(new DummyUriMapper()));
    }
    final TransportClient transportClient = new HttpClientFactory.Builder().build().getClient(Collections.emptyMap());
    final RestClient restClient = new ForceScatterGatherRestClient(new TransportClientAdapter(transportClient), uriPrefix, clientConfig);
    final RequestContext serverRequestContext = getContext().getRawRequestContext();
    final RequestContext clientRequestContext = new RequestContext();
    // Load the timing importance threshold from the server context into the client context
    clientRequestContext.putLocalAttr(TimingContextUtil.TIMING_IMPORTANCE_THRESHOLD_KEY_NAME, serverRequestContext.getLocalAttr(TimingContextUtil.TIMING_IMPORTANCE_THRESHOLD_KEY_NAME));
    try {
        // Make the request, then assert that the returned errors (if any) are as expected
        BatchKVResponse<Long, UpdateEntityStatus<InstrumentationControl>> response = restClient.sendRequest(request, clientRequestContext).getResponseEntity();
        final Map<Long, ErrorResponse> errors = response.getErrors();
        if (forceException && errors.isEmpty()) {
            throw new RestLiServiceException(HttpStatus.S_500_INTERNAL_SERVER_ERROR, "Expected failures for the downstream batch request, but found none.");
        }
        if (!forceException && !errors.isEmpty()) {
            throw new RestLiServiceException(HttpStatus.S_500_INTERNAL_SERVER_ERROR, "Expected no failures for the downstream batch request, but found some.");
        }
        for (ErrorResponse errorResponse : errors.values()) {
            if (!DOWNSTREAM_ERROR_CODE.equals(errorResponse.getCode())) {
                throw new RestLiServiceException(HttpStatus.S_500_INTERNAL_SERVER_ERROR, "Encountered a downstream failure with an unexpected or missing error code.");
            }
        }
    } catch (RemoteInvocationException e) {
        throw new RestLiServiceException(HttpStatus.S_500_INTERNAL_SERVER_ERROR, "Downstream failures should be batch entry failures, but encountered a top-level request failure.", e);
    }
    Map<TimingKey, TimingContextUtil.TimingContext> clientTimingsMap = TimingContextUtil.getTimingsMap(clientRequestContext);
    Map<TimingKey, TimingContextUtil.TimingContext> serverTimingsMap = TimingContextUtil.getTimingsMap(serverRequestContext);
    // Load all client timings into the server timings map
    serverTimingsMap.putAll(clientTimingsMap);
    getContext().setResponseHeader(HAS_CLIENT_TIMINGS_HEADER, Boolean.TRUE.toString());
    if (forceException) {
        throw new RestLiServiceException(HttpStatus.S_400_BAD_REQUEST, "You wanted me to fail, so I failed.").setCode(UPSTREAM_ERROR_CODE);
    }
    return new CreateKVResponse<>(1L, control);
}