Package com.yahoo.prelude.fastsearch

Class VespaBackend

java.lang.Object

com.yahoo.prelude.fastsearch.VespaBackend

Direct Known Subclasses:

IndexedBackend, StreamingBackend

public abstract class VespaBackend
extends Object

Superclass for backend searchers.

Author:

baldersheim

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static class	VespaBackend.FillHitsResult

Field Summary

Fields

Modifier and Type	Field	Description
static final String	SORTABLE_ATTRIBUTES_SUMMARY_CLASS	for vespa-internal use only; consider renaming the summary class

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	VespaBackend(ClusterParams clusterParams)

Method Summary

Modifier and Type	Method	Description
protected abstract void	doPartialFill(Result result, String summaryClass)
protected abstract Result	doSearch2(String schema, Query query)	Searches a search cluster This is an endpoint - searchers will never propagate the search to any nested searcher.
protected String	ensureLegalSummaryClass(Query query, String summaryClass)
void	fill(Result result, String summaryClass)
protected VespaBackend.FillHitsResult	fillHits(Result result, DocsumPacket[] packets, String summaryClass)	Fills the hits.
protected final String	getDefaultDocsumClass()
DocumentDatabase	getDocumentDatabase(Query query)
final String	getName()
String	getServerId()
Result	search(String schema, Query query)
void	shutDown()
boolean	summaryNeedsQuery(Query query)	Returns whether we need to send the query when fetching summaries.
protected void	transformQuery(Query query)

Methods inherited from class java.lang.Object

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

Field Details

SORTABLE_ATTRIBUTES_SUMMARY_CLASS

public static final String SORTABLE_ATTRIBUTES_SUMMARY_CLASS

for vespa-internal use only; consider renaming the summary class

See Also:

• Constant Field Values

Constructor Details

VespaBackend

protected VespaBackend(ClusterParams clusterParams)

Method Details

getName

public final String getName()

getDefaultDocsumClass

protected final String getDefaultDocsumClass()

doSearch2

protected abstract Result doSearch2(String schema,
 Query query)

Searches a search cluster This is an endpoint - searchers will never propagate the search to any nested searcher.

Parameters:

query - the query to search

doPartialFill

protected abstract void doPartialFill(Result result,
 String summaryClass)

summaryNeedsQuery

public boolean summaryNeedsQuery(Query query)

Returns whether we need to send the query when fetching summaries. This is necessary if the query requests summary features or dynamic snippeting.

getServerId

public String getServerId()

getDocumentDatabase

public DocumentDatabase getDocumentDatabase(Query query)

transformQuery

protected void transformQuery(Query query)

search

public Result search(String schema,
 Query query)

fill

public void fill(Result result,
 String summaryClass)

ensureLegalSummaryClass

protected String ensureLegalSummaryClass(Query query,
 String summaryClass)

fillHits

protected VespaBackend.FillHitsResult fillHits(Result result,
 DocsumPacket[] packets,
 String summaryClass)

Fills the hits.

Returns:

the number of hits that we did not return data for, and an optional error message. when things are working normally we return 0.

shutDown

public void shutDown()