Examples with CachingIndexManager org.apache.nifi.provenance.lucene.CachingIndexManager used on opensource projects

Example 1 with CachingIndexManager

use of org.apache.nifi.provenance.lucene.CachingIndexManager in project nifi by apache.

the class TestPersistentProvenanceRepository method testModifyIndexWhileSearching.

@Test(timeout = 10000)
public void testModifyIndexWhileSearching() throws IOException, InterruptedException, ParseException {
    assumeFalse(isWindowsEnvironment());
    final RepositoryConfiguration config = createConfiguration();
    config.setMaxRecordLife(30, TimeUnit.SECONDS);
    config.setMaxStorageCapacity(1024L * 1024L * 10);
    config.setMaxEventFileLife(500, TimeUnit.MILLISECONDS);
    config.setMaxEventFileCapacity(1024L * 1024L * 10);
    config.setSearchableFields(new ArrayList<>(SearchableFields.getStandardFields()));
    final CountDownLatch obtainIndexSearcherLatch = new CountDownLatch(2);
    repo = new PersistentProvenanceRepository(config, DEFAULT_ROLLOVER_MILLIS) {

        private CachingIndexManager wrappedManager = null;

        // Create an IndexManager that adds a delay before returning the Index Searcher.
        @Override
        protected synchronized CachingIndexManager getIndexManager() {
            if (wrappedManager == null) {
                final IndexManager mgr = super.getIndexManager();
                final Logger logger = LoggerFactory.getLogger("IndexManager");
                wrappedManager = new CachingIndexManager() {

                    final AtomicInteger indexSearcherCount = new AtomicInteger(0);

                    @Override
                    public EventIndexSearcher borrowIndexSearcher(File indexDir) throws IOException {
                        final EventIndexSearcher searcher = mgr.borrowIndexSearcher(indexDir);
                        final int idx = indexSearcherCount.incrementAndGet();
                        obtainIndexSearcherLatch.countDown();
                        // second thread is still holding the searcher
                        try {
                            if (idx == 1) {
                                Thread.sleep(3000L);
                            } else {
                                Thread.sleep(5000L);
                            }
                        } catch (InterruptedException e) {
                            throw new IOException("Interrupted", e);
                        }
                        logger.info("Releasing index searcher");
                        return searcher;
                    }

                    @Override
                    public EventIndexWriter borrowIndexWriter(File indexingDirectory) throws IOException {
                        return mgr.borrowIndexWriter(indexingDirectory);
                    }

                    @Override
                    public void close() throws IOException {
                        mgr.close();
                    }

                    @Override
                    public boolean removeIndex(File indexDirectory) {
                        mgr.removeIndex(indexDirectory);
                        return true;
                    }

                    @Override
                    public void returnIndexSearcher(EventIndexSearcher searcher) {
                        mgr.returnIndexSearcher(searcher);
                    }

                    @Override
                    public void returnIndexWriter(EventIndexWriter writer) {
                        mgr.returnIndexWriter(writer);
                    }
                };
            }
            return wrappedManager;
        }
    };
    repo.initialize(getEventReporter(), null, null, IdentifierLookup.EMPTY);
    final String uuid = "10000000-0000-0000-0000-000000000000";
    final Map<String, String> attributes = new HashMap<>();
    attributes.put("abc", "xyz");
    attributes.put("xyz", "abc");
    attributes.put("filename", "file-" + uuid);
    final ProvenanceEventBuilder builder = new StandardProvenanceEventRecord.Builder();
    builder.setEventTime(System.currentTimeMillis());
    builder.setEventType(ProvenanceEventType.RECEIVE);
    builder.setTransitUri("nifi://unit-test");
    attributes.put("uuid", uuid);
    builder.fromFlowFile(createFlowFile(3L, 3000L, attributes));
    builder.setComponentId("1234");
    builder.setComponentType("dummy processor");
    for (int i = 0; i < 10; i++) {
        builder.fromFlowFile(createFlowFile(i, 3000L, attributes));
        attributes.put("uuid", "00000000-0000-0000-0000-00000000000" + i);
        repo.registerEvent(builder.build());
    }
    repo.waitForRollover();
    // Perform a query. This will ensure that an IndexSearcher is created and cached.
    final Query query = new Query(UUID.randomUUID().toString());
    query.addSearchTerm(SearchTerms.newSearchTerm(SearchableFields.Filename, "file-*"));
    query.addSearchTerm(SearchTerms.newSearchTerm(SearchableFields.ComponentID, "12?4"));
    query.addSearchTerm(SearchTerms.newSearchTerm(SearchableFields.TransitURI, "nifi://*"));
    query.setMaxResults(100);
    // Run a query in a background thread. When this thread goes to obtain the IndexSearcher, it will have a 5 second delay.
    // That delay will occur as the main thread is updating the index. This should result in the search creating a new Index Reader
    // that can properly query the index.
    final int numThreads = 2;
    final CountDownLatch performSearchLatch = new CountDownLatch(numThreads);
    final Runnable searchRunnable = new Runnable() {

        @Override
        public void run() {
            QueryResult result;
            try {
                result = repo.queryEvents(query, createUser());
            } catch (IOException e) {
                e.printStackTrace();
                Assert.fail(e.toString());
                return;
            }
            System.out.println("Finished search: " + result);
            performSearchLatch.countDown();
        }
    };
    // Kick off the searcher threads
    for (int i = 0; i < numThreads; i++) {
        final Thread searchThread = new Thread(searchRunnable);
        searchThread.start();
    }
    // Wait until we've obtained the Index Searchers before modifying the index.
    obtainIndexSearcherLatch.await();
    // add more events to the repo
    for (int i = 0; i < 10; i++) {
        builder.fromFlowFile(createFlowFile(i, 3000L, attributes));
        attributes.put("uuid", "00000000-0000-0000-0000-00000000000" + i);
        repo.registerEvent(builder.build());
    }
    // Force a rollover to occur. This will modify the index.
    repo.rolloverWithLock(true);
    // Wait for the repository to roll over.
    repo.waitForRollover();
    // Wait for the searches to complete.
    performSearchLatch.await();
}