Package com.yahoo.search.dispatch

Class Dispatcher

java.lang.Object

com.yahoo.component.AbstractComponent

com.yahoo.search.dispatch.Dispatcher

All Implemented Interfaces:

com.yahoo.component.Component, com.yahoo.component.Deconstructable, Comparable<com.yahoo.component.Component>

Direct Known Subclasses:

ReconfigurableDispatcher

public class Dispatcher
extends com.yahoo.component.AbstractComponent

A dispatcher communicates with search nodes to perform queries and fill hits.

This class allocates SearchInvoker and FillInvoker objects based on query properties and general system status. The caller can then use the provided invocation object to execute the search or fill.

This class is multithread safe.

Author:

bratseth, ollvir

Field Summary

Fields

Modifier and Type	Field	Description
static final String	DISPATCH
static final com.yahoo.processing.request.CompoundName	topKProbability	If set will control computation of how many hits will be fetched from each partition.

Fields inherited from class com.yahoo.component.AbstractComponent

isDeconstructable

Constructor Summary

Constructors

Constructor	Description
Dispatcher(com.yahoo.component.ComponentId clusterId, com.yahoo.vespa.config.search.DispatchConfig dispatchConfig, com.yahoo.vespa.config.search.DispatchNodesConfig nodesConfig, com.yahoo.container.handler.VipStatus vipStatus)

Method Summary

Modifier and Type	Method	Description
boolean	allGroupsHaveSize1()
void	deconstruct()
static QueryProfileType	getArgumentType()
FillInvoker	getFillInvoker(Result result, VespaBackEndSearcher searcher)
SearchInvoker	getSearchInvoker(Query query, VespaBackEndSearcher searcher)

Methods inherited from class com.yahoo.component.AbstractComponent

clone, compareTo, getClassName, getId, getIdString, hasInitializedId, initId, isDeconstructable, setIsDeconstructable, toString

Methods inherited from class java.lang.Object

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

Field Details

DISPATCH

public static final String DISPATCH

See Also:

• Constant Field Values

topKProbability

public static final com.yahoo.processing.request.CompoundName topKProbability

If set will control computation of how many hits will be fetched from each partition.

Constructor Details

Dispatcher

@Inject
public Dispatcher(com.yahoo.component.ComponentId clusterId,
 com.yahoo.vespa.config.search.DispatchConfig dispatchConfig,
 com.yahoo.vespa.config.search.DispatchNodesConfig nodesConfig,
 com.yahoo.container.handler.VipStatus vipStatus)

Method Details

getArgumentType

public static QueryProfileType getArgumentType()

allGroupsHaveSize1

public boolean allGroupsHaveSize1()

deconstruct

public void deconstruct()

Specified by:

deconstruct in interface com.yahoo.component.Deconstructable

Overrides:

deconstruct in class com.yahoo.component.AbstractComponent

getFillInvoker

public FillInvoker getFillInvoker(Result result,
 VespaBackEndSearcher searcher)

getSearchInvoker

public SearchInvoker getSearchInvoker(Query query,
 VespaBackEndSearcher searcher)