com.yahoo.bard.webservice.web.handlers

Class SplitQueryRequestHandler

java.lang.Object

com.yahoo.bard.webservice.web.handlers.SplitQueryRequestHandler

All Implemented Interfaces:

DataRequestHandler

public class SplitQueryRequestHandler
extends Object
implements DataRequestHandler

Request handler breaks a query up into smaller time grain queries for parallel processing.

It creates a common response processor which serves as an accumulator to receive all replies before delegating to the result set processing.

Field Summary

Fields

Modifier and Type	Field and Description
protected DataRequestHandler	next
static com.codahale.metrics.Meter	SPLIT_QUERIES
static com.codahale.metrics.Meter	SPLITS

Constructor Summary

Constructors

Constructor and Description
SplitQueryRequestHandler(DataRequestHandler next) Build a Split Query Request Handler.

Method Summary

Modifier and Type	Method and Description
boolean	handleRequest(RequestContext context, DataApiRequest request, DruidAggregationQuery<?> druidQuery, ResponseProcessor response) Handle the response, passing the request down the chain as necessary.

Methods inherited from class java.lang.Object

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

Field Detail

SPLIT_QUERIES

public static final com.codahale.metrics.Meter SPLIT_QUERIES

SPLITS

public static final com.codahale.metrics.Meter SPLITS

next

@NotNull
protected final DataRequestHandler next

Constructor Detail

SplitQueryRequestHandler

public SplitQueryRequestHandler(DataRequestHandler next)

Build a Split Query Request Handler.

Parameters:

next - The next handler in the chain

Method Detail

handleRequest

public boolean handleRequest(RequestContext context,
                             DataApiRequest request,
                             DruidAggregationQuery<?> druidQuery,
                             ResponseProcessor response)

Description copied from interface: DataRequestHandler

Handle the response, passing the request down the chain as necessary.

Specified by:

handleRequest in interface DataRequestHandler

Parameters:

context - The context for the Request

request - The Api Request Object

druidQuery - The druid query

response - The Async response

Returns:

True if the async response has been processed or passed to a future for processing