org.gcube.opensearch.opensearchoperator

Class OpenSearchWorker

java.lang.Object

org.gcube.opensearch.opensearchoperator.OpenSearchWorker

All Implemented Interfaces:

Runnable

public class OpenSearchWorker
extends Object
implements Runnable

Used to perform the actual OpenSearchOp operations needed to obtain results and to return the locator of the output

Author:

gerasimos.farantatos, NKUA

Constructor Summary

Constructors

Constructor and Description
OpenSearchWorker(OpenSearchResource resource, ResourceRepository resources, OpenSearchOpConfig config, String terms, Map<String,String> params, String fixedTerms, Map<String,String> fixedParams, Set<String> queryNamespaces, Object synchLocator) Creates a new OpenSearchWorker

Method Summary

Modifier and Type	Method and Description
Integer	getFinalResultCount()
URI	getLocator() Returns the locator of the output
void	run() Performs the operations needed to obtain the requested search results.

Methods inherited from class java.lang.Object

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

Constructor Detail

OpenSearchWorker

public OpenSearchWorker(OpenSearchResource resource,
                        ResourceRepository resources,
                        OpenSearchOpConfig config,
                        String terms,
                        Map<String,String> params,
                        String fixedTerms,
                        Map<String,String> fixedParams,
                        Set<String> queryNamespaces,
                        Object synchLocator)
                 throws Exception

Creates a new OpenSearchWorker

Parameters:

resource - The OpenSearchResource associated with the provider that will be queried for results

resources - A repository capable of retrieving OpenSearchResources on demand

config - The configuration to be used

terms - The search terms to be used while querying the provider

params - The OpenSearch parameters that to be used while querying the provider

fixedTerms - The pre-fixed terms to be used while querying the top-level broker

fixedParams - The pre-fixed parameters to be used while querying the top-level broker

queryNamespaces - The namespaces present in the query

Throws:

Exception - An error has ocurred

Method Detail

getLocator

public URI getLocator()

Returns the locator of the output

Returns:

The locator of the output

getFinalResultCount

public Integer getFinalResultCount()

run

public void run()

Performs the operations needed to obtain the requested search results. After analyzing the description document corresponding to the provider described in the OpenSearchResource that is being processed, search queries are issued to obtain the results page by page. At each step the results are transformed using a transformation specification described in the OpenSearchResource, matching one of the result MIME types that the provider supports. If the provider acts as a broker, the OpenSearchResource objects of the brokered providers are retrieved and are used to obtain the actual results from the brokered providers, either sequentially or concurrently depending on configuration

Specified by:

run in interface Runnable