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, Comparable<com.yahoo.component.Component>

public class Dispatcher
extends com.yahoo.component.AbstractComponent

A dispatcher communicates with search nodes to perform queries and fill hits. This is currently not functionally complete: Queries can only be dispatched to a single node, and summaries can only be requested when they do not need the query. This class is multithread safe.

Author:

bratseth

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Dispatcher.GetDocsumsResponseReceiver Receiver of the responses to a set of getDocsums requests

Field Summary

Fields

Modifier and Type	Field and Description
private Client	client
private com.yahoo.compress.Compressor	compressor
private static Logger	log
private com.google.common.collect.ImmutableMap<Integer,Client.NodeConnection>	nodeConnections Connections to the search nodes this talks to, indexed by node id ("partid")
private SearchCluster	searchCluster A model of the search cluster this dispatches to

Fields inherited from class com.yahoo.component.AbstractComponent

isDeconstructable

Constructor Summary

Constructors

Constructor and Description
Dispatcher(com.yahoo.vespa.config.search.DispatchConfig dispatchConfig, FS4ResourcePool fs4ResourcePool, int containerClusterSize, com.yahoo.container.handler.VipStatus vipStatus)
Dispatcher(Map<Integer,Client.NodeConnection> nodeConnections, Client client) For testing

Method Summary

Modifier and Type	Method and Description
void	deconstruct()
void	fill(Result result, String summaryClass, DocumentDatabase documentDb, com.yahoo.compress.CompressionType compression) Fills the given summary class by sending RPC requests to the right search nodes
private static com.yahoo.collections.ListMap<Integer,FastHit>	hitsByNode(Result result) Return a map of hits by their search node (partition) id
SearchCluster	searchCluster() Returns the search cluster this dispatches to
private void	sendGetDocsumsRequest(int nodeId, List<FastHit> hits, String summaryClass, com.yahoo.compress.CompressionType compression, Result result, Dispatcher.GetDocsumsResponseReceiver responseReceiver) Send a getDocsums request to a node.
private static com.yahoo.slime.Slime	toSlime(String rankProfile, String summaryClass, String docType, SessionId sessionId, List<FastHit> hits)

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 Detail

log

private static final Logger log

client

private final Client client

searchCluster

private final SearchCluster searchCluster

A model of the search cluster this dispatches to

nodeConnections

private final com.google.common.collect.ImmutableMap<Integer,Client.NodeConnection> nodeConnections

Connections to the search nodes this talks to, indexed by node id ("partid")

compressor

private final com.yahoo.compress.Compressor compressor

Constructor Detail

Dispatcher

public Dispatcher(com.yahoo.vespa.config.search.DispatchConfig dispatchConfig,
                  FS4ResourcePool fs4ResourcePool,
                  int containerClusterSize,
                  com.yahoo.container.handler.VipStatus vipStatus)

Dispatcher

public Dispatcher(Map<Integer,Client.NodeConnection> nodeConnections,
                  Client client)

For testing

Method Detail

searchCluster

public SearchCluster searchCluster()

Returns the search cluster this dispatches to

fill

public void fill(Result result,
                 String summaryClass,
                 DocumentDatabase documentDb,
                 com.yahoo.compress.CompressionType compression)

Fills the given summary class by sending RPC requests to the right search nodes

hitsByNode

private static com.yahoo.collections.ListMap<Integer,FastHit> hitsByNode(Result result)

Return a map of hits by their search node (partition) id

sendGetDocsumsRequest

private void sendGetDocsumsRequest(int nodeId,
                                   List<FastHit> hits,
                                   String summaryClass,
                                   com.yahoo.compress.CompressionType compression,
                                   Result result,
                                   Dispatcher.GetDocsumsResponseReceiver responseReceiver)

Send a getDocsums request to a node. Responses will be added to the given receiver.

toSlime

private static com.yahoo.slime.Slime toSlime(String rankProfile,
                                             String summaryClass,
                                             String docType,
                                             SessionId sessionId,
                                             List<FastHit> hits)

deconstruct

public void deconstruct()

Overrides:

deconstruct in class com.yahoo.component.AbstractComponent