Package org.apache.druid.discovery

Class DataServerClient

java.lang.Object

org.apache.druid.discovery.DataServerClient

public class DataServerClient
extends Object

Client to query data servers given a query.

Constructor Summary

Constructors

Constructor	Description
DataServerClient(ServiceClientFactory serviceClientFactory, ServiceLocation serviceLocation, com.fasterxml.jackson.databind.ObjectMapper objectMapper)

Method Summary

Modifier and Type	Method	Description
<T> com.google.common.util.concurrent.ListenableFuture<Sequence<T>>	run(Query<T> query, ResponseContext responseContext, com.fasterxml.jackson.databind.JavaType queryResultType, Closer closer)	Issue a query.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

DataServerClient

public DataServerClient(ServiceClientFactory serviceClientFactory,
 ServiceLocation serviceLocation,
 com.fasterxml.jackson.databind.ObjectMapper objectMapper)

Method Details

run

public <T>
com.google.common.util.concurrent.ListenableFuture<Sequence<T>> run(Query<T> query,
 ResponseContext responseContext,
 com.fasterxml.jackson.databind.JavaType queryResultType,
 Closer closer)

Issue a query. Returns a future that resolves when the server starts sending its response.

Parameters:

query - query to run

responseContext - response context to populate

queryResultType - type of result object

closer - closer; this call will register a query canceler with this closer