Examples of com.linkedin.r2.message.MessageBuilder

com.linkedin.r2.message.rest.RestException
An object that builds new messages (rest/rpc, request/response).
{@link Message}s in the R2 system are immutable and are safe to use across threads. Builders provide a way to build new Messages, either from scratch or by copying an existing message or builder. Builders are not thread-safe, so they should be used only from one thread or proper synchronization should be used. Alternatively, a message, which is immutable, can be used as a template across threads - use {@link com.linkedin.r2.message.Message#builder()} to modify alocal copy.
Builders are designed to be chainable. For example, the following is a possible use of a RestBuilder:
```
 final RestRequest request = new RestRequestBuilder(URI.create("test")) .setEntity(new byte[] {1,2,3,4}) .setHeader("k1", "v1") .setMethod(RestMethod.PUT) .build() 
```
@see com.linkedin.r2.message.rest.RestRequestBuilder @see com.linkedin.r2.message.rest.RestResponseBuilder @see com.linkedin.r2.message.rpc.RpcRequestBuilder @see com.linkedin.r2.message.rpc.RpcResponseBuilder @author Chris Pettitt @version $Revision$


      // N.B. since QueryParamMockCollection is implemented using the synchronous rest.li interface,
      // RestLiServer.handleRequest() will invoke the application resource *and* the callback
      // *synchronously*, ensuring that the all instances of the callback are invoked before the
      // loop terminates.
      server.handleRequest(restRequest, new RequestContext(), new Callback<RestResponse>()
      {
        @Override
        public void onError(Throwable e)
        {
          Assert.fail();

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  private void executeRequestThroughParseqDebugHandler(URI uri, Callback<RestResponse> callback)
  {
    ParseqTraceDebugRequestHandler requestHandler = new ParseqTraceDebugRequestHandler();
    RestRequestBuilder requestBuilder = new RestRequestBuilder(uri);
    RestRequest request = requestBuilder.build();
    RequestContext requestContext = new RequestContext();


    requestHandler.handleRequest(request,
                                  requestContext,
                                  new RestLiDebugRequestHandler.ResourceDebugRequestHandler()
                                  {

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    // create the load balancer
    SimpleLoadBalancer loadBalancer = new SimpleLoadBalancer(state);


    final TransportClient tc = loadBalancer.getClient(new URIRequest("d2://browsemaps/52"),
                                                      new RequestContext());
    final Client c = new TransportClientAdapter(tc);
    c.restRequest(null);
  }

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                }
            }


        } catch(ExecutionException e) {
            if(e.getCause() instanceof RestException) {
                RestException exception = (RestException) e.getCause();
                if(logger.isDebugEnabled()) {
                    logger.debug("REST EXCEPTION STATUS : " + exception.getResponse().getStatus());
                }
                if(exception.getResponse().getStatus() == NOT_FOUND.getCode()) {
                    return false;
                }
            } else {
                throw new VoldemortException("Unknown HTTP request execution exception: "
                                             + e.getMessage(), e);

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                    logger.debug("Did not get any response!");
                }
            }
        } catch(ExecutionException e) {
            if(e.getCause() instanceof RestException) {
                RestException exception = (RestException) e.getCause();
                if(logger.isDebugEnabled()) {
                    logger.debug("REST EXCEPTION STATUS : " + exception.getResponse().getStatus());
                }


            } else {
                throw new VoldemortException("Unknown HTTP request execution exception: "
                                             + e.getMessage(), e);

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            RestResponse response = fetchGetResponse(rb, FETCH_SCHEMA_TIMEOUT_MS);
            return response.getEntity().asString("UTF-8");
        } catch(ExecutionException e) {
            if(e.getCause() instanceof RestException) {
                RestException exception = (RestException) e.getCause();
                if(logger.isDebugEnabled()) {
                    logger.debug("REST EXCEPTION STATUS : " + exception.getResponse().getStatus());
                }
            } else {
                throw new VoldemortException("Unknown HTTP request execution exception: "
                                             + e.getMessage(), e);
            }

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                    logger.debug("Empty response !");
                }
            }
        } catch(ExecutionException e) {
            if(e.getCause() instanceof RestException) {
                RestException exception = (RestException) e.getCause();
                if(logger.isDebugEnabled()) {
                    logger.debug("REST EXCEPTION STATUS : " + exception.getResponse().getStatus());
                }


                int httpErrorStatus = exception.getResponse().getStatus();
                if(httpErrorStatus == BAD_REQUEST.getCode()) {
                    throw new VoldemortException("Bad request: " + e.getMessage(), e);
                } else if(httpErrorStatus == PRECONDITION_FAILED.getCode()) {
                    throw new ObsoleteVersionException(e.getMessage());
                } else if(httpErrorStatus == REQUEST_TIMEOUT.getCode()

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                    }
                }
            }
        } catch(ExecutionException e) {
            if(e.getCause() instanceof RestException) {
                RestException exception = (RestException) e.getCause();
                if(logger.isDebugEnabled()) {
                    logger.debug("REST EXCEPTION STATUS : " + exception.getResponse().getStatus());
                }
            } else {
                throw new VoldemortException("Unknown HTTP request execution exception: "
                                             + e.getMessage(), e);
            }

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                    logger.debug("Did not get any response!");
                }
            }
        } catch(ExecutionException e) {
            if(e.getCause() instanceof RestException) {
                RestException exception = (RestException) e.getCause();
                if(logger.isDebugEnabled()) {
                    logger.debug("REST EXCEPTION STATUS : " + exception.getResponse().getStatus());
                }


            } else {
                throw new VoldemortException("Unknown HTTP request execution exception: "
                                             + e.getMessage(), e);

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    }


    private void handleRequestAndResponseException(Exception e) {
        if(e instanceof ExecutionException) {
            if(e.getCause() instanceof RestException) {
                RestException re = (RestException) e.getCause();
                if(logger.isDebugEnabled()) {
                    logger.debug("REST Exception Status: " + re.getResponse().getStatus());
                }
            } else {
                throw new VoldemortException("Unknown HTTP request execution exception: "
                                             + e.getMessage(), e);
            }

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