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fix: Move settings for the topic backlog reader to TopicBacklogReader…
…Settings (#254) * Add an independent TopicBacklogReaderSettings * Delete Example.java
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83
...te-beam-io/src/main/java/com/google/cloud/pubsublite/beam/TopicBacklogReaderSettings.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| /* | ||
| * Copyright 2020 Google LLC | ||
| * | ||
| * Licensed 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. | ||
| */ | ||
|
|
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| package com.google.cloud.pubsublite.beam; | ||
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| import com.google.auto.value.AutoValue; | ||
| import com.google.cloud.pubsublite.AdminClient; | ||
| import com.google.cloud.pubsublite.AdminClientSettings; | ||
| import com.google.cloud.pubsublite.SubscriptionPath; | ||
| import com.google.cloud.pubsublite.TopicPath; | ||
| import com.google.cloud.pubsublite.internal.ExtractStatus; | ||
| import com.google.cloud.pubsublite.internal.TopicStatsClient; | ||
| import com.google.cloud.pubsublite.internal.TopicStatsClientSettings; | ||
| import com.google.cloud.pubsublite.proto.TopicStatsServiceGrpc.TopicStatsServiceBlockingStub; | ||
| import com.google.common.base.Optional; | ||
| import io.grpc.StatusException; | ||
| import java.io.Serializable; | ||
| import java.util.concurrent.ExecutionException; | ||
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| @AutoValue | ||
| public abstract class TopicBacklogReaderSettings implements Serializable { | ||
| /** | ||
| * The topic path for this backlog reader. Either topicPath or subscriptionPath must be set. If | ||
| * both are set, subscriptionPath will be ignored. | ||
| */ | ||
| abstract TopicPath topicPath(); | ||
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| // Optional parameters | ||
| abstract Optional<SerializableSupplier<TopicStatsServiceBlockingStub>> stub(); | ||
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| public static Builder newBuilder() { | ||
| return new AutoValue_TopicBacklogReaderSettings.Builder(); | ||
| } | ||
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| @AutoValue.Builder | ||
| public abstract static class Builder { | ||
| // Required parameters. | ||
| public abstract Builder setTopicPath(TopicPath topicPath); | ||
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| public Builder setTopicPathFromSubscriptionPath(SubscriptionPath subscriptionPath) | ||
| throws StatusException { | ||
| try (AdminClient adminClient = | ||
| AdminClient.create( | ||
| AdminClientSettings.newBuilder() | ||
| .setRegion(subscriptionPath.location().region()) | ||
| .build())) { | ||
| setTopicPath( | ||
| TopicPath.parse(adminClient.getSubscription(subscriptionPath).get().getTopic())); | ||
| return this; | ||
| } catch (ExecutionException e) { | ||
| throw ExtractStatus.toCanonical(e.getCause()); | ||
| } catch (Throwable t) { | ||
| throw ExtractStatus.toCanonical(t); | ||
| } | ||
| } | ||
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| public abstract Builder setStub(SerializableSupplier<TopicStatsServiceBlockingStub> stub); | ||
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| public abstract TopicBacklogReaderSettings build(); | ||
| } | ||
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| TopicBacklogReader instantiate() throws StatusException { | ||
| TopicStatsClientSettings.Builder builder = TopicStatsClientSettings.newBuilder(); | ||
| if (stub().isPresent()) { | ||
| builder.setStub(stub().get().get()); | ||
| } | ||
| builder.setRegion(topicPath().location().region()); | ||
| return new TopicBacklogReaderImpl(TopicStatsClient.create(builder.build()), topicPath()); | ||
| } | ||
| } |