net.di2e.ecdr.federation

Class FifoFederationStrategy

Show UML class diagram

java.lang.Object

net.di2e.ecdr.federation.FifoFederationStrategy

All Implemented Interfaces:

ddf.catalog.federation.FederationStrategy

public class FifoFederationStrategy
extends Object
implements ddf.catalog.federation.FederationStrategy

The Class FifoFederationStrategy represents a First In First Out (FIFO) federation strategy that returns results in the order they are received. This means that the first results received by this strategy are the first results sent back to the client.

Constructor Summary

Constructors

Constructor and Description
FifoFederationStrategy(ExecutorService queryExecutorService, List<ddf.catalog.plugin.PreFederatedQueryPlugin> preQuery, List<ddf.catalog.plugin.PostFederatedQueryPlugin> postQuery) Instantiates a FifoFederationStrategy with the provided ExecutorService.

Method Summary

Methods

Modifier and Type	Method and Description
protected ddf.catalog.operation.QueryResponse	executePostFederationPlugins(ddf.catalog.operation.QueryResponse queryResponse)
protected void	executeSourceQueries(List<ddf.catalog.source.Source> sources, Map<ddf.catalog.source.Source,Future<ddf.catalog.operation.SourceResponse>> futures, ddf.catalog.operation.QueryRequest modifiedQueryRequest)
ddf.catalog.operation.QueryResponse	federate(List<ddf.catalog.source.Source> sources, ddf.catalog.operation.QueryRequest queryRequest)
protected ddf.catalog.operation.Query	getModifiedQuery(ddf.catalog.operation.Query originalQuery, int numberOfSources, int offset, int pageSize)

Methods inherited from class java.lang.Object

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

Constructor Detail

FifoFederationStrategy

public FifoFederationStrategy(ExecutorService queryExecutorService,
                      List<ddf.catalog.plugin.PreFederatedQueryPlugin> preQuery,
                      List<ddf.catalog.plugin.PostFederatedQueryPlugin> postQuery)

Instantiates a FifoFederationStrategy with the provided ExecutorService.

Parameters:

queryExecutorService - the ExecutorService for queries

Method Detail

federate

public ddf.catalog.operation.QueryResponse federate(List<ddf.catalog.source.Source> sources,
                                           ddf.catalog.operation.QueryRequest queryRequest)

Specified by:

federate in interface ddf.catalog.federation.FederationStrategy

executePostFederationPlugins

protected ddf.catalog.operation.QueryResponse executePostFederationPlugins(ddf.catalog.operation.QueryResponse queryResponse)

executeSourceQueries

protected void executeSourceQueries(List<ddf.catalog.source.Source> sources,
                        Map<ddf.catalog.source.Source,Future<ddf.catalog.operation.SourceResponse>> futures,
                        ddf.catalog.operation.QueryRequest modifiedQueryRequest)

getModifiedQuery

protected ddf.catalog.operation.Query getModifiedQuery(ddf.catalog.operation.Query originalQuery,
                                           int numberOfSources,
                                           int offset,
                                           int pageSize)