Examples with CallbackResponse com.google.cloud.spanner.AsyncResultSet.CallbackResponse used on opensource projects

Example 6 with CallbackResponse

use of com.google.cloud.spanner.AsyncResultSet.CallbackResponse in project grpc-gcp-java by GoogleCloudPlatform.

the class SpannerClient method singleQueryAsync.

public ApiFuture<Void> singleQueryAsync() {
    final AsyncResultSet asyncResultSet = dbClient.singleUse().executeQueryAsync(Statement.of("SELECT Key,StringValue FROM " + TABLE_NAME + " WHERE -123  != " + uniqueString()));
    final ApiFuture<Void> queryFuture = asyncResultSet.setCallback(executor, new ReadyCallback() {

        @Override
        public CallbackResponse cursorReady(AsyncResultSet resultSet) {
            while (true) {
                switch(resultSet.tryNext()) {
                    case OK:
                        // System.out.println(resultSet.getString("StringValue"));
                        break;
                    case NOT_READY:
                        return CallbackResponse.CONTINUE;
                    case DONE:
                        return CallbackResponse.DONE;
                    default:
                        throw new IllegalStateException();
                }
            }
        }
    });
    return queryFuture;
}

Example 7 with CallbackResponse

use of com.google.cloud.spanner.AsyncResultSet.CallbackResponse in project cloud-spanner-r2dbc by GoogleCloudPlatform.

the class ReactiveResultSetCallbackTest method callbackEmitsOnOk.

@Test
void callbackEmitsOnOk() {
    when(this.mockResultSet.tryNext()).thenReturn(CursorState.OK);
    Struct struct = Struct.newBuilder().add(Value.string("some result")).build();
    when(this.mockResultSet.getCurrentRowAsStruct()).thenReturn(struct);
    StepVerifier.create(Flux.<SpannerClientLibraryRow>create(sink -> {
        ReactiveResultSetCallback cb = new ReactiveResultSetCallback(sink, this.mockResultSet);
        CallbackResponse response = cb.cursorReady(this.mockResultSet);
        assertThat(response).isSameAs(CallbackResponse.CONTINUE);
    })).assertNext(r -> assertThat(r.get(1)).isEqualTo("some result")).thenCancel().verify();
}

Example 8 with CallbackResponse

use of com.google.cloud.spanner.AsyncResultSet.CallbackResponse in project java-spanner by googleapis.

the class ITAsyncExamplesTest method readUsingIndexAsync.

@Test
public void readUsingIndexAsync() throws Exception {
    final SettableApiFuture<List<String>> future = SettableApiFuture.create();
    try (AsyncResultSet rs = client.singleUse().readUsingIndexAsync(TABLE_NAME, INDEX_NAME, KeySet.all(), ALL_COLUMNS)) {
        rs.setCallback(executor, new ReadyCallback() {

            final List<String> values = new LinkedList<>();

            @Override
            public CallbackResponse cursorReady(AsyncResultSet resultSet) {
                try {
                    while (true) {
                        switch(resultSet.tryNext()) {
                            case DONE:
                                future.set(values);
                                return CallbackResponse.DONE;
                            case NOT_READY:
                                return CallbackResponse.CONTINUE;
                            case OK:
                                values.add(resultSet.getString("StringValue"));
                                break;
                        }
                    }
                } catch (Throwable t) {
                    future.setException(t);
                    return CallbackResponse.DONE;
                }
            }
        });
    }
    assertThat(future.get()).containsExactlyElementsIn(ALL_VALUES_IN_PK_ORDER);
}

Example 9 with CallbackResponse

use of com.google.cloud.spanner.AsyncResultSet.CallbackResponse in project java-spanner by googleapis.

the class ITAsyncExamplesTest method executeQueryAsync.

@Test
public void executeQueryAsync() throws Exception {
    final ImmutableList<String> keys = ImmutableList.of("k3", "k4");
    final SettableApiFuture<List<String>> future = SettableApiFuture.create();
    try (AsyncResultSet rs = client.singleUse().executeQueryAsync(Statement.newBuilder("SELECT StringValue FROM TestTable WHERE Key IN UNNEST(@keys)").bind("keys").toStringArray(keys).build())) {
        rs.setCallback(executor, new ReadyCallback() {

            final List<String> values = new LinkedList<>();

            @Override
            public CallbackResponse cursorReady(AsyncResultSet resultSet) {
                try {
                    while (true) {
                        switch(resultSet.tryNext()) {
                            case DONE:
                                future.set(values);
                                return CallbackResponse.DONE;
                            case NOT_READY:
                                return CallbackResponse.CONTINUE;
                            case OK:
                                values.add(resultSet.getString("StringValue"));
                                break;
                        }
                    }
                } catch (Throwable t) {
                    future.setException(t);
                    return CallbackResponse.DONE;
                }
            }
        });
    }
    assertThat(future.get()).containsExactly("v3", "v4");
}

Example 10 with CallbackResponse

use of com.google.cloud.spanner.AsyncResultSet.CallbackResponse in project cloud-spanner-r2dbc by GoogleCloudPlatform.

the class ReactiveResultSetCallbackTest method callbackStopsSinkOnCompletion.

@Test
void callbackStopsSinkOnCompletion() {
    when(this.mockResultSet.tryNext()).thenReturn(CursorState.DONE);
    StepVerifier.create(Flux.<SpannerClientLibraryRow>create(sink -> {
        CallbackResponse response = new ReactiveResultSetCallback(sink, this.mockResultSet).cursorReady(this.mockResultSet);
        assertThat(response).isSameAs(CallbackResponse.DONE);
    })).verifyComplete();
}