Package com.yahoo.search.dispatch

Class InterleavedSearchInvoker

java.lang.Object

com.yahoo.search.dispatch.CloseableInvoker

com.yahoo.search.dispatch.SearchInvoker

com.yahoo.search.dispatch.InterleavedSearchInvoker

All Implemented Interfaces:

ResponseMonitor<SearchInvoker>, Closeable, AutoCloseable

public class InterleavedSearchInvoker
extends SearchInvoker
implements ResponseMonitor<SearchInvoker>

InterleavedSearchInvoker uses multiple SearchInvoker objects to interface with content nodes in parallel. Operationally it first sends requests to all contained invokers and then collects the results. The user of this class is responsible for merging the results if needed.

Author:

ollivir

Constructor Summary

Constructors

Constructor	Description
InterleavedSearchInvoker(Collection<SearchInvoker> invokers, SearchCluster searchCluster, Group group, Set<Integer> alreadyFailedNodes)

Method Summary

Modifier and Type	Method	Description
protected long	currentTime()
protected InvokerResult	getSearchResult(Execution execution)
protected LinkedBlockingQueue<SearchInvoker>	newQueue()
protected void	release()
void	responseAvailable(SearchInvoker from)
protected Object	sendSearchRequest(Query query, Object unusedContext)	Sends search queries to the contained SearchInvoker sub-invokers.
protected void	setMonitor(ResponseMonitor<SearchInvoker> monitor)

Methods inherited from class com.yahoo.search.dispatch.SearchInvoker

distributionKey, errorResult, responseAvailable, search

Methods inherited from class com.yahoo.search.dispatch.CloseableInvoker

close, setFinalStatus, teardown

Methods inherited from class java.lang.Object

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

Constructor Detail

InterleavedSearchInvoker

public InterleavedSearchInvoker(Collection<SearchInvoker> invokers,
                                SearchCluster searchCluster,
                                Group group,
                                Set<Integer> alreadyFailedNodes)

Method Detail

sendSearchRequest

protected Object sendSearchRequest(Query query,
                                   Object unusedContext)
                            throws IOException

Sends search queries to the contained SearchInvoker sub-invokers. If the search query has an offset other than zero, it will be reset to zero and the expected hit amount will be adjusted accordingly.

Specified by:

sendSearchRequest in class SearchInvoker

Parameters:

query - the query to send

unusedContext - a context object that can be used to pass context among different invokers, e.g for reuse of preserialized data.

Returns:

an object that can be passed to the next invocation of sendSearchRequest

Throws:

IOException

getSearchResult

protected InvokerResult getSearchResult(Execution execution)
                                 throws IOException

Specified by:

getSearchResult in class SearchInvoker

Throws:

IOException

release

protected void release()

Specified by:

release in class CloseableInvoker

responseAvailable

public void responseAvailable(SearchInvoker from)

Specified by:

responseAvailable in interface ResponseMonitor<SearchInvoker>

setMonitor

protected void setMonitor(ResponseMonitor<SearchInvoker> monitor)

Overrides:

setMonitor in class SearchInvoker

currentTime

protected long currentTime()

newQueue

protected LinkedBlockingQueue<SearchInvoker> newQueue()