org.apache.solr.handler.component

Class SuggestComponent

java.lang.Object

org.apache.solr.handler.component.SearchComponent

org.apache.solr.handler.component.SuggestComponent

All Implemented Interfaces:

AutoCloseable, Accountable, SolrInfoBean, SolrMetricProducer, SuggesterParams, NamedListInitializedPlugin, SolrCoreAware

public class SuggestComponent
extends SearchComponent
implements SolrCoreAware, SuggesterParams, Accountable, SolrMetricProducer

SuggestComponent: interacts with multiple SolrSuggester to serve up suggestions Responsible for routing commands and queries to the appropriate SolrSuggester and for initializing them as specified by SolrConfig

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.solr.core.SolrInfoBean

SolrInfoBean.Category, SolrInfoBean.Group

Field Summary

Fields

Modifier and Type	Field and Description
static String	COMPONENT_NAME Name used to identify whether the user query concerns this component
protected NamedList	initParams
protected SolrMetricsContext	metricsContext
protected Map<String,SolrSuggester>	suggesters Key is the dictionary name used in SolrConfig, value is the corresponding SolrSuggester

Fields inherited from class org.apache.solr.handler.component.SearchComponent

metricNames, registry, standard_components

Fields inherited from interface org.apache.solr.spelling.suggest.SuggesterParams

SUGGEST_ALL_TERMS_REQUIRED, SUGGEST_BUILD, SUGGEST_BUILD_ALL, SUGGEST_CONTEXT_FILTER_QUERY, SUGGEST_COUNT, SUGGEST_DICT, SUGGEST_HIGHLIGHT, SUGGEST_PREFIX, SUGGEST_Q, SUGGEST_RELOAD, SUGGEST_RELOAD_ALL

Fields inherited from interface org.apache.lucene.util.Accountable

NULL_ACCOUNTABLE

Constructor Summary

Constructors

Constructor and Description
SuggestComponent()

Method Summary

Modifier and Type	Method and Description
int	distributedProcess(ResponseBuilder rb) Dispatch shard request in STAGE_EXECUTE_QUERY stage
void	finishStage(ResponseBuilder rb) Used in Distributed Search, merges the suggestion results from every shard
Collection<Accountable>	getChildResources()
String	getDescription() Simple one or two line description
SolrMetricsContext	getSolrMetricsContext() Implementing classes should override this method to provide the context obtained in SolrMetricProducer.initializeMetrics(SolrMetricsContext, String) to ensure proper cleanup of metrics at the end of the life-cycle of this component.
void	inform(SolrCore core)
void	init(NamedList args)
void	initializeMetrics(SolrMetricsContext parentContext, String scope) Initialize metrics specific to this producer.
void	prepare(ResponseBuilder rb) Responsible for issuing build and rebuild command to the specified SolrSuggester
void	process(ResponseBuilder rb) Responsible for using the specified suggester to get the suggestions for the query and write the results
long	ramBytesUsed()

Methods inherited from class org.apache.solr.handler.component.SearchComponent

getCategory, getMetricNames, getMetricRegistry, getName, handleResponses, modifyRequest, setName

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.solr.metrics.SolrMetricProducer

close, getUniqueMetricTag, initializeMetrics

Methods inherited from interface org.apache.solr.core.SolrInfoBean

getMetricsSnapshot, registerMetricName

Field Detail

COMPONENT_NAME

public static final String COMPONENT_NAME

Name used to identify whether the user query concerns this component

See Also:

Constant Field Values

initParams

protected NamedList initParams

metricsContext

protected SolrMetricsContext metricsContext

suggesters

protected Map<String,SolrSuggester> suggesters

Key is the dictionary name used in SolrConfig, value is the corresponding SolrSuggester

Constructor Detail

SuggestComponent

public SuggestComponent()

Method Detail

init

public void init(NamedList args)

Specified by:

init in interface NamedListInitializedPlugin

Overrides:

init in class SearchComponent

inform

public void inform(SolrCore core)

Specified by:

inform in interface SolrCoreAware

prepare

public void prepare(ResponseBuilder rb)
             throws IOException

Responsible for issuing build and rebuild command to the specified SolrSuggester

Specified by:

prepare in class SearchComponent

Parameters:

rb - The ResponseBuilder

Throws:

IOException - If there is a low-level I/O error.

distributedProcess

public int distributedProcess(ResponseBuilder rb)

Dispatch shard request in STAGE_EXECUTE_QUERY stage

Overrides:

distributedProcess in class SearchComponent

Returns:

the next stage for this component

process

public void process(ResponseBuilder rb)
             throws IOException

Responsible for using the specified suggester to get the suggestions for the query and write the results

Specified by:

process in class SearchComponent

Parameters:

rb - The ResponseBuilder

Throws:

IOException - If there is a low-level I/O error.

finishStage

public void finishStage(ResponseBuilder rb)

Used in Distributed Search, merges the suggestion results from every shard

Overrides:

finishStage in class SearchComponent

getDescription

public String getDescription()

Description copied from interface: SolrInfoBean

Simple one or two line description

Specified by:

getDescription in interface SolrInfoBean

Specified by:

getDescription in class SearchComponent

getSolrMetricsContext

public SolrMetricsContext getSolrMetricsContext()

Description copied from interface: SolrMetricProducer

Implementing classes should override this method to provide the context obtained in SolrMetricProducer.initializeMetrics(SolrMetricsContext, String) to ensure proper cleanup of metrics at the end of the life-cycle of this component.

Specified by:

getSolrMetricsContext in interface SolrMetricProducer

initializeMetrics

public void initializeMetrics(SolrMetricsContext parentContext,
                              String scope)

Description copied from interface: SolrMetricProducer

Initialize metrics specific to this producer.

Specified by:

initializeMetrics in interface SolrMetricProducer

Parameters:

parentContext - parent metrics context. If this component has the same life-cycle as the parent it can simply use the parent context, otherwise it should obtain a child context using SolrMetricsContext.getChildContext(Object) passing this as the child.

scope - component scope

ramBytesUsed

public long ramBytesUsed()

Specified by:

ramBytesUsed in interface Accountable

getChildResources

public Collection<Accountable> getChildResources()

Specified by:

getChildResources in interface Accountable