Examples with Transaction com.apple.foundationdb.Transaction used on opensource projects

Example 36 with Transaction

use of com.apple.foundationdb.Transaction in project fdb-record-layer by FoundationDB.

the class FDBReverseDirectoryCacheTest method testPutIfNotExists.

@Test
public void testPutIfNotExists() throws Exception {
    final Random random = new Random();
    final String name = "dir_" + Math.abs(random.nextInt());
    final Long id;
    ScopedValue<String> scopedName = globalScope.wrap(name);
    FDBReverseDirectoryCache rdc = fdb.getReverseDirectoryCache();
    try (FDBRecordContext context = openContext()) {
        Transaction tr = context.ensureActive();
        id = Tuple.fromBytes(DirectoryLayer.getDefault().createOrOpen(tr, PathUtil.from(name)).get().pack()).getLong(0);
        commit(context);
    }
    // Initial store should be considered a hard miss
    try (FDBRecordContext context = openContext()) {
        rdc.putIfNotExists(context, scopedName, id).get();
        // A few more calls to make sure that we only put it in once
        rdc.putIfNotExists(context, scopedName, id).get();
        rdc.putIfNotExists(context, scopedName, id).get();
        rdc.putIfNotExists(context, scopedName, id).get();
        assertEquals(3L, rdc.getPersistentCacheHitCount());
        assertEquals(1L, rdc.getPersistentCacheMissCount());
        assertEquals(3L, context.getTimer().getCount(FDBStoreTimer.Counts.REVERSE_DIR_PERSISTENT_CACHE_HIT_COUNT));
        assertEquals(1L, context.getTimer().getCount(FDBStoreTimer.Counts.REVERSE_DIR_PERSISTENT_CACHE_MISS_COUNT));
        commit(context);
    }
    // Second attempt should miss the in-memory cache but hit the persistent cache
    rdc.clearStats();
    try (FDBRecordContext context = openContext()) {
        rdc.putIfNotExists(context, scopedName, id).get();
        assertEquals(1L, rdc.getPersistentCacheHitCount());
        assertEquals(0L, rdc.getPersistentCacheMissCount());
        assertEquals(1L, context.getTimer().getCount(FDBStoreTimer.Counts.REVERSE_DIR_PERSISTENT_CACHE_HIT_COUNT));
        assertEquals(0L, context.getTimer().getCount(FDBStoreTimer.Counts.REVERSE_DIR_PERSISTENT_CACHE_MISS_COUNT));
        commit(context);
    }
}

Example 37 with Transaction

use of com.apple.foundationdb.Transaction in project fdb-record-layer by FoundationDB.

the class FDBReverseDirectoryCacheTest method testGetInReverseCacheSubspace.

@Test
public void testGetInReverseCacheSubspace() {
    final Random random = new Random();
    final String name = "dir_" + Math.abs(random.nextInt());
    final Long id;
    try (FDBRecordContext context = openContext()) {
        Transaction tr = context.ensureActive();
        // need to use the FDB DirectoryLayer to bypass LocatableResolver which populates the reverse directory cache automatically
        id = Tuple.fromBytes(DirectoryLayer.getDefault().createOrOpen(tr, Collections.singletonList(name)).join().getKey()).getLong(0);
        commit(context);
    }
    ScopedValue<Long> scopedId = globalScope.wrap(id);
    FDBStoreTimer timer = new FDBStoreTimer();
    assertThat("the lookup does not return a value", fdb.getReverseDirectoryCache().getInReverseDirectoryCacheSubspace(timer, scopedId).join(), is(Optional.empty()));
    assertEquals(fdb.getReverseDirectoryCache().getPersistentCacheMissCount(), 1);
    assertEquals(fdb.getReverseDirectoryCache().getPersistentCacheHitCount(), 0);
    assertThat("it does not scan the directory layer", timer.getCount(FDBStoreTimer.DetailEvents.RD_CACHE_DIRECTORY_SCAN), is(0));
    // assert that the last lookup did not populate the cache
    assertThat("the lookup still does not return a value", fdb.getReverseDirectoryCache().getInReverseDirectoryCacheSubspace(timer, scopedId).join(), is(Optional.empty()));
    assertEquals(fdb.getReverseDirectoryCache().getPersistentCacheMissCount(), 2);
    assertEquals(fdb.getReverseDirectoryCache().getPersistentCacheHitCount(), 0);
    assertThat("it does not scan the directory layer", timer.getCount(FDBStoreTimer.DetailEvents.RD_CACHE_DIRECTORY_SCAN), is(0));
}

Example 38 with Transaction

use of com.apple.foundationdb.Transaction in project lionrock by panghy.

the class RemoteDatabase method run.

public <T> T run(String name, Function<? super Transaction, T> retryable, Executor e) {
    Transaction t = this.createTransaction(name, e);
    try {
        while (true) {
            try {
                T returnVal = retryable.apply(t);
                t.commit().join();
                return returnVal;
            } catch (RuntimeException err) {
                t = t.onError(err).join();
            }
        }
    } finally {
        t.close();
    }
}

Example 39 with Transaction

use of com.apple.foundationdb.Transaction in project lionrock by panghy.

the class AbstractFoundationDBClientTests method setKeyAndCommit.

long setKeyAndCommit(Database db, byte[] key, byte[] value) {
    Transaction tx = db.createTransaction();
    tx.set(key, value);
    tx.commit().join();
    return tx.getCommittedVersion();
}

Example 40 with Transaction

use of com.apple.foundationdb.Transaction in project lionrock by panghy.

the class AbstractFoundationDBClientTests method clearRangeAndCommit.

long clearRangeAndCommit(Database db, byte[] start, byte[] end) {
    Transaction tx = db.createTransaction();
    tx.clear(start, end);
    tx.commit().join();
    return tx.getCommittedVersion();
}