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package eu.dnetlib.services;
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import java.io.InputStream;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Set;
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import org.antlr.stringtemplate.StringTemplate;
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import org.apache.commons.io.IOUtils;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.scheduling.annotation.Scheduled;
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import org.springframework.stereotype.Component;
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import com.google.common.collect.Sets;
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import eu.dnetlib.clients.ISLookUpClient;
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import eu.dnetlib.clients.ISRegistryClient;
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import eu.dnetlib.enabling.annotations.DnetServiceType;
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import eu.dnetlib.exceptions.ISLookUpException;
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@Component
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public class ServiceRegistrationManager {
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private static final Log log = LogFactory.getLog(ServiceRegistrationManager.class);
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@Autowired
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private ISLookUpClient isLookup;
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@Autowired
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private ISRegistryClient isRegistry;
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private boolean disabled = false;
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@Autowired(required = false)
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private List<BaseService> services = new ArrayList<>();
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@Scheduled(fixedDelay = 20000)
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public void registerAllServices() throws Exception {
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if (disabled) { return; }
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log.info("registering services...");
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disabled = true;
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final Set<String> schemas = Sets.newHashSet(isLookup.listSchemas());
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for (final BaseService service : services) {
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if (!schemas.contains(service.getServiceType())) {
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registerSchema(service.getServiceType());
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}
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if (!isAlreadyRegistered(service)) {
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registerService(service);
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}
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}
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log.info("...all services registered");
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}
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private boolean isAlreadyRegistered(final BaseService service) throws ISLookUpException {
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final String query = "for $x in collection('/db/DRIVER/DnetService') "
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+ "where $x//baseUrl='" + service.getBaseUrl() + "' "
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+ "and $x//type/@value = '" + service.getServiceType() + "' "
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+ "return $x//id/text()";
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final List<String> profIds = isLookup.find(query);
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if (profIds.isEmpty()) {
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log.debug("there is no service registered for service: " + service.getServiceType());
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return false;
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} else {
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service.setProfileId(profIds.get(0));
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return true;
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}
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}
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private void registerService(final BaseService service) throws Exception {
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final DnetServiceType type = service.getServiceType();
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final String st = IOUtils.toString(getClass().getResourceAsStream("ServiceProfileTemplate.st"));
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final StringTemplate templ = new StringTemplate(st);
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templ.setAttribute("resourceType", type);
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templ.setAttribute("baseUrl", service.getBaseUrl());
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templ.setAttribute("properties", new HashMap<>());
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final String profId = isRegistry.register(templ.toString());
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log.info(" new service: " + profId);
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service.setProfileId(profId);
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}
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private void registerSchema(final DnetServiceType type) throws Exception {
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final InputStream schemaStream = getClass().getResourceAsStream("ServiceProfileSchemaTemplate.st");
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if (schemaStream == null) { throw new IllegalStateException("cannot find service profile schema template"); }
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final StringTemplate schema = new StringTemplate(IOUtils.toString(schemaStream));
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schema.setAttribute("resourceType", type);
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isRegistry.registerSchema(type.toString(), schema.toString());
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log.info(" new schema : " + type);
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}
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public boolean isDisabled() {
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return disabled;
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}
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}
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