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package eu.dnetlib.datasource.publisher.clients;
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import java.util.List;
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import java.util.Queue;
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import java.util.concurrent.*;
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import com.google.common.base.Function;
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import com.google.common.base.Joiner;
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import com.google.common.base.Predicate;
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import com.google.common.collect.Iterables;
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import com.google.common.util.concurrent.*;
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import eu.dnetlib.datasource.publisher.DatasourceException;
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import eu.dnetlib.datasource.publisher.model.*;
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import org.apache.commons.lang.exception.ExceptionUtils;
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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.apache.cxf.common.i18n.Exception;
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import org.springframework.beans.factory.annotation.Autowired;
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/**
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* Created by claudio on 20/10/2016.
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*/
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public class DatasourceInfoRetriever {
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private static final Log log = LogFactory.getLog(DatasourceInfoRetriever.class);
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@Autowired
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private MongoLoggerClient mongoLoggerClient;
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@Autowired
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private DatasourceIndexClient datasourceIndexClient;
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@Autowired
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private ISLookupClient lookupClient;
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@Autowired
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private JdbcDatasourceDao jdbcDatasourceDao;
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private ListeningExecutorService service;
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private final static int WORKERS = 100;
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public DatasourceInfoRetriever() {
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service = MoreExecutors.listeningDecorator(
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new ScheduledThreadPoolExecutor(WORKERS,
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new ThreadFactoryBuilder().setNameFormat("datasource-info-retriever-%d").build()));
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}
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public DatasourceInfo getInfo(final String dsId) throws DatasourceException {
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final CountDownLatch outerLatch = new CountDownLatch(3);
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final Queue<Throwable> errors = new ConcurrentLinkedQueue<>();
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final DatasourceInfo datasourceInfo = new DatasourceInfo();
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Futures.addCallback(getAggregationHistory(dsId), new FutureCallback<List<AggregationInfo>>() {
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public void onSuccess(List<AggregationInfo> info) {
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setAggregationHistory(datasourceInfo, info);
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outerLatch.countDown();
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}
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public void onFailure(Throwable e) {
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errors.offer(e);
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outerLatch.countDown();
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}
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});
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Futures.addCallback(getDatasourceDetails(dsId), new FutureCallback<Datasource>() {
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@Override
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public void onSuccess(final Datasource datasource) {
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datasourceInfo.setDatasource(datasource);
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outerLatch.countDown();
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}
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@Override
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public void onFailure(final Throwable e) {
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errors.offer(e);
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outerLatch.countDown();
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}
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});
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Futures.addCallback(calculateCurrentIndexDsInfo(), new FutureCallback<IndexDsInfo>() {
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public void onSuccess(final IndexDsInfo info) {
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final CountDownLatch innerLatch = new CountDownLatch(1);
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Futures.addCallback(getIndexInfo(dsId, info), new FutureCallback<IndexRecordsInfo>() {
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public void onSuccess(IndexRecordsInfo info) {
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datasourceInfo.setIndexRecords(info.getCount()).setLastIndexingDate(info.getDate());
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innerLatch.countDown();
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}
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public void onFailure(Throwable e) {
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errors.offer(e);
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innerLatch.countDown();
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}
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});
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waitLatch(innerLatch, errors, 10);
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outerLatch.countDown();
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}
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public void onFailure(final Throwable e) {
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errors.offer(e);
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outerLatch.countDown();
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}
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});
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waitLatch(outerLatch, errors, 10);
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if (!errors.isEmpty()) {
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datasourceInfo.getResponseHeader().setError(Joiner.on("\n").join(Iterables.transform(errors, new Function<Throwable, String>() {
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@Override
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public String apply(final Throwable e) {
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return e.getMessage();
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}
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})));
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log.error(Joiner.on("\n").join(Iterables.transform(errors, new Function<Throwable, String>() {
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@Override
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public String apply(final Throwable e) {
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return ExceptionUtils.getFullStackTrace(e);
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}
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})));
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}
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return datasourceInfo;
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}
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private ListenableFuture<Datasource> getDatasourceDetails(final String dsId) {
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return service.submit(new Callable<Datasource>() {
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@Override
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public Datasource call() throws DatasourceException {
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return jdbcDatasourceDao.getDatasource(dsId);
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}
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});
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}
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private ListenableFuture<IndexDsInfo> calculateCurrentIndexDsInfo() {
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return service.submit(new Callable<IndexDsInfo>() {
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public IndexDsInfo call() throws DatasourceException {
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return lookupClient.calculateCurrentIndexDsInfo();
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}
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});
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}
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private ListenableFuture<IndexRecordsInfo> getIndexInfo(final String dsId, final IndexDsInfo info) {
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return service.submit(new Callable<IndexRecordsInfo>() {
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public IndexRecordsInfo call() throws DatasourceException {
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return datasourceIndexClient.getIndexInfo(dsId, info);
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}
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});
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}
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private ListenableFuture<List<AggregationInfo>> getAggregationHistory(final String dsId) {
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return service.submit(new Callable<List<AggregationInfo>>() {
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public List<AggregationInfo> call() throws DatasourceException {
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return mongoLoggerClient.getAggregationHistory(dsId);
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}
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});
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}
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private void setAggregationHistory(DatasourceInfo datasourceInfo, final List<AggregationInfo> info) {
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datasourceInfo.setAggregationHistory(info);
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if (!info.isEmpty()) {
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datasourceInfo.setLastCollection(Iterables.find(info, new Predicate<AggregationInfo>() {
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@Override
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public boolean apply(final AggregationInfo a) {
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return AggregationStage.COLLECT.equals(a.getAggregationStage());
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}
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})).setLastTransformation(Iterables.find(info, new Predicate<AggregationInfo>() {
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@Override
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public boolean apply(final AggregationInfo a) {
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return AggregationStage.TRANSFORM.equals(a.getAggregationStage());
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}
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}));
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}
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}
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private void waitLatch(final CountDownLatch latch, final Queue<Throwable> errors, final int waitSeconds) {
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try {
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if (!latch.await(waitSeconds, TimeUnit.SECONDS)) {
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errors.offer(new TimeoutException("Waiting for requests to complete has timed out."));
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}
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} catch (final InterruptedException e) {
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errors.offer(e);
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}
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}
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}
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