Examples with PreWriteCheck com.apple.foundationdb.record.provider.foundationdb.keyspace.ResolverCreateHooks.PreWriteCheck used on opensource projects

Example 1 with PreWriteCheck

use of com.apple.foundationdb.record.provider.foundationdb.keyspace.ResolverCreateHooks.PreWriteCheck in project fdb-record-layer by FoundationDB.

the class ResolverCreateHooksTest method testPreWriteChecks.

@Test
void testPreWriteChecks() {
    // reads the key, and chooses the resolver based on the value
    final PreWriteCheck check = (context, providedResolver) -> {
        CompletableFuture<LocatableResolver> expectedResolverFuture = root().add("should-use-A").toTupleAsync(context).thenCompose(keyTuple -> context.ensureActive().get(keyTuple.pack())).thenApply(value -> {
            boolean useA = Tuple.fromBytes(value).getBoolean(0);
            return new ScopedInterningLayer(database, resolverPath(context, useA ? "A" : "B"));
        });
        return expectedResolverFuture.thenApply(expectedResolver -> expectedResolver.equals(providedResolver));
    };
    final ResolverCreateHooks hooks = new ResolverCreateHooks(check, ResolverCreateHooks.DEFAULT_HOOK);
    // use resolver A
    database.run(context -> root().add("should-use-A").toTupleAsync(context).thenAccept(tuple -> context.ensureActive().set(tuple.pack(), Tuple.from(true).pack())));
    try (FDBRecordContext context = database.openContext()) {
        LocatableResolver resolverA = new ScopedInterningLayer(database, resolverPath(context, "A"));
        LocatableResolver resolverB = new ScopedInterningLayer(database, resolverPath(context, "B"));
        assertChecks(context, resolverA, hooks, true);
        assertChecks(context, resolverB, hooks, false);
    }
    // use resolver B
    database.run(context -> root().add("should-use-A").toTupleAsync(context).thenAccept(tuple -> context.ensureActive().set(tuple.pack(), Tuple.from(false).pack())));
    // after migration
    try (FDBRecordContext context = database.openContext()) {
        LocatableResolver resolverA = new ScopedInterningLayer(database, resolverPath(context, "A"));
        LocatableResolver resolverB = new ScopedInterningLayer(database, resolverPath(context, "B"));
        assertChecks(context, resolverA, hooks, false);
        assertChecks(context, resolverB, hooks, true);
    }
}

Example 2 with PreWriteCheck

use of com.apple.foundationdb.record.provider.foundationdb.keyspace.ResolverCreateHooks.PreWriteCheck in project fdb-record-layer by FoundationDB.

the class LocatableResolverTest method testWriteSafetyCheck.

@Test
public void testWriteSafetyCheck() {
    KeySpace keySpace = new KeySpace(new KeySpaceDirectory("path1", KeyType.STRING, "path1"), new KeySpaceDirectory("path2", KeyType.STRING, "path2"));
    final LocatableResolver path1Resolver;
    final LocatableResolver path2Resolver;
    try (FDBRecordContext context = database.openContext()) {
        ResolvedKeySpacePath path1 = keySpace.path("path1").toResolvedPath(context);
        ResolvedKeySpacePath path2 = keySpace.path("path2").toResolvedPath(context);
        path1Resolver = resolverFactory.create(path1);
        path2Resolver = resolverFactory.create(path2);
    }
    PreWriteCheck validCheck = (context, resolver) -> CompletableFuture.completedFuture(Objects.equals(path1Resolver, resolver));
    PreWriteCheck invalidCheck = (context, resolver) -> CompletableFuture.completedFuture(Objects.equals(path2Resolver, resolver));
    ResolverCreateHooks validHooks = new ResolverCreateHooks(validCheck, DEFAULT_HOOK);
    ResolverCreateHooks invalidHooks = new ResolverCreateHooks(invalidCheck, DEFAULT_HOOK);
    Long value = path1Resolver.resolve("some-key", validHooks).join();
    try (FDBRecordContext context = database.openContext()) {
        assertThat("it succeeds and writes the value", path1Resolver.mustResolve(context, "some-key").join(), is(value));
    }
    assertThat("when reading the same key it doesn't perform the check", path1Resolver.resolve("some-key", invalidHooks).join(), is(value));
    try {
        path1Resolver.resolve("another-key", invalidHooks).join();
        fail("should throw CompletionException");
    } catch (CompletionException ex) {
        assertThat("it has the correct cause", ex.getCause(), is(instanceOf(LocatableResolverLockedException.class)));
        assertThat(ex, hasMessageContaining("prewrite check failed"));
    }
}