Examples of com.linkedin.r2.filter.FilterChain

com.linkedin.r2.transport.common.bridge.client.TransportClientAdapter
A chain of {@link Filter}s that get a chance to process or modify the request, wire attributes, and local attributes.

Immutability

Filter chains are immutable. Adding a new filter does not change the filter chain but instead produces a copy of the filter chain with the new filter inserted.

Filter Order

Requests are processed starting from the beginning of the chain and move towards the end of the filter chain. Responses are processed from the end of the filter chain and move back towards the beginning of the filter chain.
If a request filter throws an exception, calls {@code nextFilter.onResponse(...)}, or calls {@code nextFilter.onError(..)} then that filter will have the appropriate responsemethod invoked (onResponse or onError). The response will flow back towards the beginning of the filter chain. Filters later in the chain will not get a change to process the request or the response.

Filter Priority

It is possible to implement a generic message filter and a message filter specific to a request type (RPC or REST). In general, this should be avoided. If a filter implements both types of interfaces then the more specific one is invoked and the less specific one is ignored.

Wire Attributes

Wire attributes provide a mechanism for sending request or response metadata to the remote endpoint. As an example, this facility can be used to send a unique request identifier from a client to a server.

Local Attributes

Filters must be stateless, so local attributes provide a mechanism for saving some state during the request which can be used during response processing. As an example, this facility can be used to store the time at which a request began so that total request latency can be logged when the response is received.

@author Chris Pettitt

        .setStatus(status)
        .setHeaders(getHeaders())
        .setProtocolVersion(getProtocolVersion())
        .build();


    RestResponse restResponse = new RestResponseBuilder()
        .setEntity(entity)
        .setStatus(status)
        .setHeaders(decodedResponse.getHeaders())
        .build();

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                                    @Override
                                    public void handleRequest(RestRequest request,
                                                               RequestContext requestContext,
                                                               RequestExecutionCallback<RestResponse> callback)
                                    {
                                      RestResponse response = EasyMock.createMock(RestResponse.class);
                                      RequestExecutionReportBuilder executionReportBuilder =
                                         new RequestExecutionReportBuilder();
                                      JsonTraceCodec jsonTraceCodec = new JsonTraceCodec();
                                      Trace t = null;

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      headers.putAll(getHeaders());
    }
    headers.put(errorHeaderName, "true");
    headers.put(RestConstants.HEADER_RESTLI_PROTOCOL_VERSION, protocolVersion.toString());


    RestResponse restResponse = new RestResponseBuilder()
        .setEntity(entity)
        .setStatus(status)
        .setHeaders(Collections.unmodifiableMap(headers))
        .build();

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        .setStatus(status)
        .setHeaders(getHeaders())
        .setProtocolVersion(getProtocolVersion())
        .build();


    RestResponse restResponse = new RestResponseBuilder()
        .setEntity(entity)
        .setStatus(status)
        .setHeaders(decodedResponse.getHeaders())
        .build();

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                        .setMaxR2ConnectionPoolSize(100);
        clientFactory = new HttpClientFactory();
        Map<String, String> properties = new HashMap<String, String>();
        properties.put(HttpClientFactory.HTTP_POOL_SIZE,
                       Integer.toString(restClientConfig.getMaxR2ConnectionPoolSize()));
        TransportClient transportClient = clientFactory.getClient(properties);
        R2Store r2Store = new R2Store(STORE_NAME,
                                      restClientConfig.getHttpBootstrapURL(),
                                      "0",
                                      transportClient,
                                      restClientConfig,

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                   int zoneId) {
        super(storeName);
        if(transportClient == null) {
            this.client = d2Client;
        } else {
            this.client = new TransportClientAdapter(transportClient);
        }
        this.config = config;
        this.restBootstrapURL = restBootstrapURL;
        this.mapper = new ObjectMapper();
        this.routingTypeCode = routingCodeStr;

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        this.config = config;
        this.httpClientFactory = new HttpClientFactory();
        Map<String, String> properties = Maps.newHashMap();
        properties.put(HttpClientFactory.HTTP_POOL_SIZE,
                       Integer.toString(this.config.getMaxR2ConnectionPoolSize()));
        this.client = new TransportClientAdapter(httpClientFactory.getClient(properties));
    }

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    int index = entries * 4 - 1;
    for (String operation: compressionOperations)
    {
      Map<String, String> clientProperties = new HashMap<String, String>();
      clientProperties.put(HttpClientFactory.HTTP_RESPONSE_COMPRESSION_OPERATIONS, operation);
      TransportClientAdapter clientAdapter = new TransportClientAdapter(new HttpClientFactory(FilterChains.empty()).getClient(clientProperties));
      RestClient client = new RestClient(clientAdapter, URI_PREFIX);
      result[index--] = new Object[]{ client, operation, RestliRequestOptions.DEFAULT_OPTIONS, Arrays.asList(1000L, 2000L), 0 };
      result[index--] = new Object[]{ client, operation, TestConstants.FORCE_USE_NEXT_OPTIONS, Arrays.asList(1000L, 2000L), 0 };
      result[index--] = new Object[]{ client, operation, RestliRequestOptions.DEFAULT_OPTIONS, Arrays.asList(1L, 2L, 3L, 4L), 4 };
      result[index--] = new Object[]{ client, operation, TestConstants.FORCE_USE_NEXT_OPTIONS, Arrays.asList(1L, 2L, 3L, 4L), 4 };

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    int index = entries * 4 - 1;
    for (String operation: compressionOperations)
    {
      Map<String, String> clientProperties = new HashMap<String, String>();
      clientProperties.put(HttpClientFactory.HTTP_RESPONSE_COMPRESSION_OPERATIONS, operation);
      TransportClientAdapter clientAdapter = new TransportClientAdapter(new HttpClientFactory(FilterChains.empty()).getClient(clientProperties));
      RestClient client = new RestClient(clientAdapter, URI_PREFIX);
      result[index--] = new Object[]{ client, operation, new RootBuilderWrapper<Long, Greeting>(new GreetingsBuilders()) };
      result[index--] = new Object[]{ client, operation, new RootBuilderWrapper<Long, Greeting>(new GreetingsBuilders(TestConstants.FORCE_USE_NEXT_OPTIONS)) };
      result[index--] = new Object[]{ client, operation, new RootBuilderWrapper<Long, Greeting>(new GreetingsRequestBuilders()) };
      result[index--] = new Object[]{ client, operation, new RootBuilderWrapper<Long, Greeting>(new GreetingsRequestBuilders(TestConstants.FORCE_USE_NEXT_OPTIONS)) };

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   */
  @DataProvider(name = com.linkedin.restli.internal.common.TestConstants.RESTLI_PROTOCOL_1_2_PREFIX + "clientsCookbookDataProvider")
  public Object[][] clientsCookbookDataProvider()
  {
    // need separate TransportClientAdapter for shutdown test
    TransportClientAdapter clientAdapter1 = new TransportClientAdapter(new HttpClientFactory(FilterChains.empty()).
      getClient(Collections.<String, String>emptyMap()));
    TransportClientAdapter clientAdapter2 = new TransportClientAdapter(new HttpClientFactory(FilterChains.empty()).
      getClient(Collections.<String, String>emptyMap()));
    return new Object[][]
      {
        { new RestClient(clientAdapter1, URI_PREFIX), RestliRequestOptions.DEFAULT_OPTIONS },
        { new RestClient(clientAdapter2, URI_PREFIX), TestConstants.FORCE_USE_NEXT_OPTIONS },

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