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package eu.dnetlib.repo.manager.server.services;
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import eu.dnetlib.domain.data.Repository;
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import eu.dnetlib.gwt.server.service.SpringGwtRemoteServiceServlet;
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import eu.dnetlib.repo.manager.client.services.BrokerService;
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import eu.dnetlib.repo.manager.shared.BrokerException;
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import eu.dnetlib.repo.manager.shared.RepositoryServiceException;
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import eu.dnetlib.repo.manager.shared.Tuple;
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import eu.dnetlib.repo.manager.shared.broker.AdvQueryObject;
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import eu.dnetlib.repo.manager.shared.broker.BrowseEntry;
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import eu.dnetlib.repo.manager.shared.broker.DatasourcesBroker;
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import eu.dnetlib.repo.manager.shared.broker.EventsPage;
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import eu.dnetlib.repos.RepoApi;
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import org.apache.log4j.Logger;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.beans.factory.annotation.Value;
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import org.springframework.core.ParameterizedTypeReference;
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import org.springframework.http.HttpEntity;
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import org.springframework.http.HttpMethod;
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import org.springframework.http.ResponseEntity;
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import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
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import org.springframework.stereotype.Service;
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import org.springframework.util.LinkedMultiValueMap;
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import org.springframework.util.MultiValueMap;
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import org.springframework.web.client.RestClientException;
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import org.springframework.web.client.RestTemplate;
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import org.springframework.web.util.UriComponentsBuilder;
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import javax.servlet.ServletConfig;
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import javax.servlet.ServletException;
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import java.util.*;
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/**
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* Created by stefanos on 10/26/16.
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*/
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@SuppressWarnings("serial")
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@Service("brokerService")
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public class BrokerServiceImpl extends SpringGwtRemoteServiceServlet implements BrokerService {
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private static final Logger LOGGER = Logger
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.getLogger(BrokerServiceImpl.class);
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@Autowired
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private RepoApi repoAPI;
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@Override
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public void init(ServletConfig config) throws ServletException {
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super.init(config);
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LOGGER.info("broker service init");
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}
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@Value("${services.broker.url}:${services.broker.port}/${services.broker.path}")
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private String apiPath;
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/**
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* @param datasourceName the name of the data source
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* @return a list of BrowseEvent entries for that datasource
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* @throws BrokerException containing the error code from the server
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* @author stefanos
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*/
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@Override
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public List<BrowseEntry> getTopicsForDatasource(String datasourceName) throws BrokerException {
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final String service = "/topicsForDatasource";
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//build the uri params
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UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl(apiPath + service)
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.queryParam("ds", datasourceName);
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//create new template engine
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RestTemplate template = new RestTemplate();
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template.getMessageConverters().add(new MappingJackson2HttpMessageConverter());
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ResponseEntity<List<BrowseEntry>> resp;
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try {
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//communicate with endpoint
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resp = template.exchange(
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builder.build().encode().toUri(),
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HttpMethod.GET,
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null,
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new ParameterizedTypeReference<List<BrowseEntry>>() {
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});
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} catch (RestClientException e) {
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throw new BrokerException(e);
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}
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return resp.getBody();
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}
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/**
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* @param datasourceName the name of the datasource
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* @param topic the name of the topic to filter
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* @param page the page number
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* @return an Events page with a constant 50 max number of entires
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* @throws BrokerException containing the error code from the server
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*/
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@Override
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public EventsPage showEvents(String datasourceName, String topic, long page) throws BrokerException {
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final String service = "/showEvents";
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//build the uri params
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UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl(apiPath + service)
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.queryParam("ds", datasourceName)
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.queryParam("topic", topic)
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.queryParam("page", page);
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//create new template engine
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RestTemplate template = new RestTemplate();
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template.getMessageConverters().add(new MappingJackson2HttpMessageConverter());
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ResponseEntity<EventsPage> resp;
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try {
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//communicate with endpoint
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resp = template.exchange(
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builder.build().encode().toUri(),
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HttpMethod.GET,
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null,
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new ParameterizedTypeReference<EventsPage>() {
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});
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} catch (RestClientException e) {
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throw new BrokerException(e);
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}
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return resp.getBody();
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}
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/**
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* @param advQueryObject a pojo class containing the filter parameters
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* @param page the number of the page
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* @param pageSize the page size
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* @return
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* @throws BrokerException
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*/
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@Override
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public EventsPage advancedShowEvents(AdvQueryObject advQueryObject, long page, long pageSize) throws BrokerException {
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final String service = "/advancedShowEvents/{page}/{pageSize}";
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// URI (URL) parameters
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Map<String, Long> uriParams = new HashMap<>();
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uriParams.put("page", page);
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uriParams.put("pageSize", pageSize);
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//build the uri params
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UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl(apiPath + service);
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//Header info
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MultiValueMap<String, String> headers = new LinkedMultiValueMap<>();
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headers.add("Content-Type", "application/json");
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advQueryObject.setPage(page);
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HttpEntity<AdvQueryObject> entity = new HttpEntity<>(advQueryObject, headers);
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//create new template engine
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RestTemplate template = new RestTemplate();
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template.getMessageConverters().add(new MappingJackson2HttpMessageConverter());
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ResponseEntity<EventsPage> resp;
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try {
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//communicate with endpoint
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resp = template.exchange(
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builder.buildAndExpand(uriParams).encode().toUri(),
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HttpMethod.POST,
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entity,
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new ParameterizedTypeReference<EventsPage>() {
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}
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);
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} catch (RestClientException e) {
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throw new BrokerException(e);
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}
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return resp.getBody();
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}
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@Override
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public DatasourcesBroker getDatasourcesOfUser(String userEmail, boolean includeShared, boolean includeByOthers) throws BrokerException {
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DatasourcesBroker ret = new DatasourcesBroker();
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try {
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LOGGER.debug("In getDatasourcesOfUser");
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//set for user
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ret.setDatasourcesOfUser(getDatasourcesOfUserType(this.repoAPI.getRepositoriesOfUser(userEmail, false)));
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//set for shared
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if (includeShared) {
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//TODO whatever nikonas was saying
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List<String> sharedDatasourceIds = new ArrayList<String>();
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ret.setSharedDatasources(getDatasourcesOfUserType(this.repoAPI.getReposByIds(sharedDatasourceIds)));
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}
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//set others
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if (includeByOthers) {
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ret.setDatasourcesOfOthers(getDatasourcesOfUserType(this.repoAPI.getRepositoriesOfUser(userEmail, true)));
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}
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} catch (RepositoryServiceException e) {
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e.printStackTrace();
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throw new BrokerException(e);
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} catch (Exception e) {
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e.printStackTrace();
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}
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return ret;
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}
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/**
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* Helper class to aggregate the datasources topic sizes by datasource name.
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*
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* @param repositories to be aggregated
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* @return a List of BrowseEntry with the official name and the number of topics for each repo and logo url
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* @throws BrokerException
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*/
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private List<Tuple<BrowseEntry, String>> getDatasourcesOfUserType(List<Repository> repositories) throws BrokerException {
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//get user entries
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LOGGER.debug("getDatasourcesOfUserType : " + repositories.size());
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List<Tuple<BrowseEntry, String>> entries = new ArrayList<>();
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for (Repository repo : repositories) {
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BrowseEntry temp = new BrowseEntry();
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temp.setValue(repo.getOfficialName());
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temp.setSize(new Long(0));
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for (BrowseEntry e : this.getTopicsForDatasource(repo.getOfficialName())) {
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temp.setSize(temp.getSize() + e.getSize());
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}
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Tuple<BrowseEntry, String> tup = new Tuple<>(temp, repo.getLogoUrl());
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entries.add(tup);
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}
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// sort the collection by the second field of the tuple which is size
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Collections.sort(entries, new Comparator<Tuple<BrowseEntry, String>>() {
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@Override
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public int compare(Tuple<BrowseEntry, String> e1, Tuple<BrowseEntry, String> e2) {
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return (int) (e2.getFirst().getSize().longValue() - e1.getFirst().getSize().longValue());
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}
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});
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return entries;
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}
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}
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