| /* |
| * 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.pubsublite; |
| |
| import static org.apache.beam.vendor.guava.v26_0_jre.com.google.common.base.Preconditions.checkNotNull; |
| |
| import com.google.api.gax.rpc.ApiException; |
| import com.google.auto.value.AutoValue; |
| import com.google.cloud.pubsublite.AdminClient; |
| import com.google.cloud.pubsublite.AdminClientSettings; |
| import com.google.cloud.pubsublite.Partition; |
| 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 java.io.Serializable; |
| import java.util.concurrent.ExecutionException; |
| import javax.annotation.Nonnull; |
| import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.base.Ticker; |
| |
| @AutoValue |
| abstract class TopicBacklogReaderSettings implements Serializable { |
| private static final long serialVersionUID = -4001752066450248673L; |
| |
| /** |
| * 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(); |
| |
| abstract Partition partition(); |
| |
| static Builder newBuilder() { |
| return new AutoValue_TopicBacklogReaderSettings.Builder(); |
| } |
| |
| @AutoValue.Builder |
| abstract static class Builder { |
| |
| // Required parameters. |
| abstract Builder setTopicPath(TopicPath topicPath); |
| |
| @SuppressWarnings("assignment.type.incompatible") |
| Builder setTopicPathFromSubscriptionPath(SubscriptionPath subscriptionPath) |
| throws ApiException { |
| try (AdminClient adminClient = |
| AdminClient.create( |
| AdminClientSettings.newBuilder() |
| .setRegion(subscriptionPath.location().extractRegion()) |
| .build())) { |
| return setTopicPath( |
| TopicPath.parse(adminClient.getSubscription(subscriptionPath).get().getTopic())); |
| } catch (ExecutionException e) { |
| @Nonnull Throwable cause = checkNotNull(e.getCause()); |
| throw ExtractStatus.toCanonical(cause).underlying; |
| } catch (Throwable t) { |
| throw ExtractStatus.toCanonical(t).underlying; |
| } |
| } |
| |
| abstract Builder setPartition(Partition partition); |
| |
| abstract TopicBacklogReaderSettings build(); |
| } |
| |
| TopicBacklogReader instantiate() throws ApiException { |
| TopicStatsClientSettings settings = |
| TopicStatsClientSettings.newBuilder() |
| .setRegion(topicPath().location().extractRegion()) |
| .build(); |
| TopicBacklogReader impl = |
| new TopicBacklogReaderImpl(TopicStatsClient.create(settings), topicPath(), partition()); |
| return new LimitingTopicBacklogReader(impl, Ticker.systemTicker()); |
| } |
| } |