Package org.apache.druid.rpc

Interface Summary

Interface	Description
ServiceClient	Mid-level client that provides an API similar to low-level HttpClient, but accepts RequestBuilder instead of Request, and internally handles service location and retries.
ServiceClientFactory	Factory for creating ServiceClient.
ServiceLocator	Used by ServiceClient to locate services.
ServiceRetryPolicy	Used by ServiceClient to decide whether to retry requests.

Class Summary

Class	Description
DiscoveryServiceLocator	A ServiceLocator that uses DruidNodeDiscovery.
FixedSetServiceLocator	Basic implmentation of ServiceLocator that returns a service location from a static set of locations.
IgnoreHttpResponseHandler	An HTTP response handler that discards the response and returns nothing.
RequestBuilder	Used by ServiceClient to generate Request objects for an HttpClient.
ServiceClientFactoryImpl	Production implementation of ServiceClientFactory.
ServiceClientImpl	Production implementation of ServiceClient.
ServiceLocation	Represents a service location at a particular point in time.
ServiceLocations	Returned by ServiceLocator.locate().
StandardRetryPolicy	Retry policy configurable with a maximum number of attempts and min/max wait time.
StandardRetryPolicy.Builder

Exception Summary

Exception	Description
HttpResponseException	Returned by ServiceClient.asyncRequest(org.apache.druid.rpc.RequestBuilder, org.apache.druid.java.util.http.client.response.HttpResponseHandler<IntermediateType, FinalType>) when a request has failed due to an HTTP response.
RpcException	Returned by ServiceClient.asyncRequest(org.apache.druid.rpc.RequestBuilder, org.apache.druid.java.util.http.client.response.HttpResponseHandler<IntermediateType, FinalType>) when a request has failed.
ServiceClosedException	Returned by ServiceClient.asyncRequest(org.apache.druid.rpc.RequestBuilder, org.apache.druid.java.util.http.client.response.HttpResponseHandler<IntermediateType, FinalType>) when a request has failed because the service is closed.
ServiceNotAvailableException	Returned by ServiceClient.asyncRequest(org.apache.druid.rpc.RequestBuilder, org.apache.druid.java.util.http.client.response.HttpResponseHandler<IntermediateType, FinalType>) when a request has failed because the service is not available.