| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.beam.sdk.io.gcp.spanner; |
| |
| import java.util.Map; |
| import org.apache.beam.sdk.Pipeline; |
| import org.apache.beam.sdk.transforms.PTransform; |
| import org.apache.beam.sdk.values.PCollection; |
| import org.apache.beam.sdk.values.PInput; |
| import org.apache.beam.sdk.values.POutput; |
| import org.apache.beam.sdk.values.PValue; |
| import org.apache.beam.sdk.values.TupleTag; |
| import org.apache.beam.vendor.guava.v20_0.com.google.common.collect.ImmutableMap; |
| |
| /** |
| * The results of a {@link SpannerIO#write()} transform. |
| * |
| * <p>Use {@link #getFailedMutations()} to access a {@link PCollection} of MutationGroups that |
| * failed to write. |
| * |
| * <p>The {@link PCollection} returned by {@link #getOutput()} can be used in batch pipelines as a |
| * completion signal to {@link org.apache.beam.sdk.transforms.Wait Wait.OnSignal} to indicate when |
| * all input has been written. Note that in streaming pipelines, this signal will never be triggered |
| * as the input is unbounded and this {@link PCollection} is using the {@link |
| * org.apache.beam.sdk.transforms.windowing.GlobalWindow GlobalWindow}. |
| */ |
| public class SpannerWriteResult implements POutput { |
| private final Pipeline pipeline; |
| private final PCollection<Void> output; |
| private final PCollection<MutationGroup> failedMutations; |
| private final TupleTag<MutationGroup> failedMutationsTag; |
| |
| public SpannerWriteResult( |
| Pipeline pipeline, |
| PCollection<Void> output, |
| PCollection<MutationGroup> failedMutations, |
| TupleTag<MutationGroup> failedMutationsTag) { |
| this.pipeline = pipeline; |
| this.output = output; |
| this.failedMutations = failedMutations; |
| this.failedMutationsTag = failedMutationsTag; |
| } |
| |
| @Override |
| public Pipeline getPipeline() { |
| return pipeline; |
| } |
| |
| @Override |
| public Map<TupleTag<?>, PValue> expand() { |
| return ImmutableMap.of(failedMutationsTag, failedMutations); |
| } |
| |
| public PCollection<MutationGroup> getFailedMutations() { |
| return failedMutations; |
| } |
| |
| public PCollection<Void> getOutput() { |
| return output; |
| } |
| |
| @Override |
| public void finishSpecifyingOutput( |
| String transformName, PInput input, PTransform<?, ?> transform) {} |
| } |