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package eu.dnetlib.data.search.solr;
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import eu.dnetlib.api.data.IndexService;
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import eu.dnetlib.api.enabling.ISLookUpService;
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import eu.dnetlib.api.enabling.ISLookUpServiceException;
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import gr.uoa.di.driver.util.ServiceLocator;
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import org.apache.log4j.Logger;
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import java.util.List;
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/**
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* Created by antleb on 2/4/14.
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*/
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public class SolrClientLocator implements ServiceLocator<IndexService> {
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private Logger logger = Logger.getLogger(getClass());
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private SolrIndexClient indexClient = null;
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private ServiceLocator<ISLookUpService> lookUpServiceServiceLocator = null;
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private String interpretation = null;
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private String cachedUrl = null;
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@Override
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public IndexService getService() {
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if (indexClient == null) {
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indexClient = locateIndexService();
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}
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return indexClient;
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}
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private SolrIndexClient locateIndexService() {
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SolrIndexClient client = new SolrIndexClient();
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try {
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List<String> urls = lookUpServiceServiceLocator.getService().quickSearchProfile("for $x in //RESOURCE_PROFILE//PROTOCOL[./@name='solr'] return data($x/@address)");
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if (urls.size() > 0) {
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logger.debug("cached url " + cachedUrl);
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cachedUrl = chooseIndexService(urls);
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} else {
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cachedUrl = getCachedIndexService(urls);
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logger.warn("Falling back to cached value for index : " + cachedUrl);
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throw new IllegalArgumentException("Could not locate an index service with a SOLR interface");
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}
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} catch (ISLookUpServiceException ise) {
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logger.warn("Error locating service", ise);
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} finally {
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logger.warn("Falling back to cached value for index : " + cachedUrl);
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client.setSolrServerUrl(cachedUrl);
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client.setInterpretation(this.interpretation);
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}
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return client;
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}
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private String getCachedIndexService(List<String> urls) {
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if (cachedUrl.equals("${services.index.default.url}"))
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return urls.get(0);
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return cachedUrl;
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}
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private String chooseIndexService(List<String> urls) {
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return urls.get(0);
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}
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public ServiceLocator<ISLookUpService> getLookUpServiceServiceLocator() {
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return lookUpServiceServiceLocator;
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}
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public void setLookUpServiceServiceLocator(ServiceLocator<ISLookUpService> lookUpServiceServiceLocator) {
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this.lookUpServiceServiceLocator = lookUpServiceServiceLocator;
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}
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public String getInterpretation() {
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return interpretation;
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}
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public void setInterpretation(String interpretation) {
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this.interpretation = interpretation;
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}
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public String getCachedUrl() {
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return cachedUrl;
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}
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public void setCachedUrl(String cachedUrl) {
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this.cachedUrl = cachedUrl;
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}
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}
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