/
AdminUtils.java
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/
AdminUtils.java
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/*
* Copyright 2021 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.
*/
package pubsublite.spark;
import com.google.api.core.ApiFuture;
import com.google.api.core.ApiFutures;
import com.google.api.gax.rpc.AlreadyExistsException;
import com.google.api.gax.rpc.ApiException;
import com.google.cloud.pubsub.v1.AckReplyConsumer;
import com.google.cloud.pubsub.v1.MessageReceiver;
import com.google.cloud.pubsublite.AdminClient;
import com.google.cloud.pubsublite.AdminClient.BacklogLocation;
import com.google.cloud.pubsublite.AdminClientSettings;
import com.google.cloud.pubsublite.CloudRegion;
import com.google.cloud.pubsublite.CloudZone;
import com.google.cloud.pubsublite.MessageMetadata;
import com.google.cloud.pubsublite.ProjectNumber;
import com.google.cloud.pubsublite.SubscriptionName;
import com.google.cloud.pubsublite.SubscriptionPath;
import com.google.cloud.pubsublite.TopicName;
import com.google.cloud.pubsublite.TopicPath;
import com.google.cloud.pubsublite.cloudpubsub.FlowControlSettings;
import com.google.cloud.pubsublite.cloudpubsub.Publisher;
import com.google.cloud.pubsublite.cloudpubsub.PublisherSettings;
import com.google.cloud.pubsublite.cloudpubsub.Subscriber;
import com.google.cloud.pubsublite.cloudpubsub.SubscriberSettings;
import com.google.cloud.pubsublite.proto.Subscription;
import com.google.cloud.pubsublite.proto.Topic;
import com.google.protobuf.ByteString;
import com.google.protobuf.util.Durations;
import com.google.pubsub.v1.PubsubMessage;
import java.util.ArrayList;
import java.util.List;
import java.util.Queue;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
public class AdminUtils {
public static void createTopicExample(
String cloudRegion, char zoneId, long projectNumber, String topicId, int partitions)
throws Exception {
TopicPath topicPath =
TopicPath.newBuilder()
.setProject(ProjectNumber.of(projectNumber))
.setLocation(CloudZone.of(CloudRegion.of(cloudRegion), zoneId))
.setName(TopicName.of(topicId))
.build();
Topic topic =
Topic.newBuilder()
.setPartitionConfig(
Topic.PartitionConfig.newBuilder()
// Set throughput capacity per partition in MiB/s.
.setCapacity(
Topic.PartitionConfig.Capacity.newBuilder()
// Must be 4-16 MiB/s.
.setPublishMibPerSec(4)
// Must be 4-32 MiB/s.
.setSubscribeMibPerSec(8)
.build())
.setCount(partitions))
.setRetentionConfig(
Topic.RetentionConfig.newBuilder()
// How long messages are retained.
.setPeriod(Durations.fromDays(1))
// Set storage per partition to 30 GiB. This must be 30 GiB-10 TiB.
// If the number of bytes stored in any of the topic's partitions grows
// beyond this value, older messages will be dropped to make room for
// newer ones, regardless of the value of `period`.
.setPerPartitionBytes(30 * 1024 * 1024 * 1024L))
.setName(topicPath.toString())
.build();
AdminClientSettings adminClientSettings =
AdminClientSettings.newBuilder().setRegion(CloudRegion.of(cloudRegion)).build();
try (AdminClient adminClient = AdminClient.create(adminClientSettings)) {
Topic response = adminClient.createTopic(topic).get();
System.out.println(response.getAllFields() + "created successfully.");
} catch (ExecutionException e) {
if (e.getCause() instanceof AlreadyExistsException) {
System.out.println(topicPath + " already exists");
} else {
throw e;
}
}
}
public static void createSubscriptionExample(
String cloudRegion, char zoneId, long projectNumber, String topicId, String subscriptionId)
throws Exception {
TopicPath topicPath =
TopicPath.newBuilder()
.setProject(ProjectNumber.of(projectNumber))
.setLocation(CloudZone.of(CloudRegion.of(cloudRegion), zoneId))
.setName(TopicName.of(topicId))
.build();
SubscriptionPath subscriptionPath =
SubscriptionPath.newBuilder()
.setLocation(CloudZone.of(CloudRegion.of(cloudRegion), zoneId))
.setProject(ProjectNumber.of(projectNumber))
.setName(SubscriptionName.of(subscriptionId))
.build();
Subscription subscription =
Subscription.newBuilder()
.setDeliveryConfig(
// Possible values for DeliveryRequirement:
// - `DELIVER_IMMEDIATELY`
// - `DELIVER_AFTER_STORED`
// You may choose whether to wait for a published message to be successfully written
// to storage before the server delivers it to subscribers. `DELIVER_IMMEDIATELY` is
// suitable for applications that need higher throughput.
Subscription.DeliveryConfig.newBuilder()
.setDeliveryRequirement(
Subscription.DeliveryConfig.DeliveryRequirement.DELIVER_IMMEDIATELY))
.setName(subscriptionPath.toString())
.setTopic(topicPath.toString())
.build();
AdminClientSettings adminClientSettings =
AdminClientSettings.newBuilder().setRegion(CloudRegion.of(cloudRegion)).build();
try (AdminClient adminClient = AdminClient.create(adminClientSettings)) {
Subscription response =
adminClient.createSubscription(subscription, BacklogLocation.BEGINNING).get();
System.out.println(response.getAllFields() + "created successfully.");
} catch (ExecutionException e) {
if (e.getCause() instanceof AlreadyExistsException) {
System.out.println(topicPath + " already exists");
} else {
throw e;
}
}
}
public static void deleteSubscriptionExample(
String cloudRegion, SubscriptionPath subscriptionPath) throws Exception {
AdminClientSettings adminClientSettings =
AdminClientSettings.newBuilder().setRegion(CloudRegion.of(cloudRegion)).build();
try (AdminClient adminClient = AdminClient.create(adminClientSettings)) {
adminClient.deleteSubscription(subscriptionPath).get();
System.out.println(subscriptionPath + " deleted successfully.");
}
}
public static void deleteTopicExample(String cloudRegion, TopicPath topicPath) throws Exception {
AdminClientSettings adminClientSettings =
AdminClientSettings.newBuilder().setRegion(CloudRegion.of(cloudRegion)).build();
try (AdminClient adminClient = AdminClient.create(adminClientSettings)) {
adminClient.deleteTopic(topicPath).get();
System.out.println(topicPath + " deleted successfully.");
}
}
public static void publisherExample(
String cloudRegion, char zoneId, long projectNumber, String topicId, List<String> words)
throws ApiException, ExecutionException, InterruptedException {
TopicPath topicPath =
TopicPath.newBuilder()
.setProject(ProjectNumber.of(projectNumber))
.setLocation(CloudZone.of(CloudRegion.of(cloudRegion), zoneId))
.setName(TopicName.of(topicId))
.build();
Publisher publisher = null;
List<ApiFuture<String>> futures = new ArrayList<>();
try {
PublisherSettings publisherSettings =
PublisherSettings.newBuilder().setTopicPath(topicPath).build();
publisher = Publisher.create(publisherSettings);
// Start the publisher. Upon successful starting, its state will become RUNNING.
publisher.startAsync().awaitRunning();
for (String word : words) {
// Include the count in message, and convert the message to a byte string
ByteString data = ByteString.copyFromUtf8(word + "_1");
PubsubMessage pubsubMessage = PubsubMessage.newBuilder().setData(data).build();
// Publish a message. Messages are automatically batched.
ApiFuture<String> future = publisher.publish(pubsubMessage);
futures.add(future);
}
} finally {
ArrayList<MessageMetadata> metadata = new ArrayList<>();
List<String> ackIds = ApiFutures.allAsList(futures).get();
for (String id : ackIds) {
// Decoded metadata contains partition and offset.
metadata.add(MessageMetadata.decode(id));
}
System.out.println(metadata + "\nPublished " + ackIds.size() + " messages.");
if (publisher != null) {
// Shut down the publisher.
publisher.stopAsync().awaitTerminated();
System.out.println("Publisher is shut down.");
}
}
}
public static Queue<PubsubMessage> subscriberExample(
String cloudRegion, char zoneId, long projectNumber, String subscriptionId)
throws ApiException {
// Sample has at most 200 messages.
Queue<PubsubMessage> result = new ArrayBlockingQueue<>(1000);
SubscriptionPath subscriptionPath =
SubscriptionPath.newBuilder()
.setLocation(CloudZone.of(CloudRegion.of(cloudRegion), zoneId))
.setProject(ProjectNumber.of(projectNumber))
.setName(SubscriptionName.of(subscriptionId))
.build();
MessageReceiver receiver =
(PubsubMessage message, AckReplyConsumer consumer) -> {
result.add(message);
consumer.ack();
};
FlowControlSettings flowControlSettings =
FlowControlSettings.builder()
.setBytesOutstanding(10 * 1024 * 1024L)
.setMessagesOutstanding(1000L)
.build();
SubscriberSettings subscriberSettings =
SubscriberSettings.newBuilder()
.setSubscriptionPath(subscriptionPath)
.setReceiver(receiver)
.setPerPartitionFlowControlSettings(flowControlSettings)
.build();
Subscriber subscriber = Subscriber.create(subscriberSettings);
// Start the subscriber. Upon successful starting, its state will become RUNNING.
subscriber.startAsync().awaitRunning();
try {
System.out.println(subscriber.state());
// Wait 90 seconds for the subscriber to reach TERMINATED state. If it encounters
// unrecoverable errors before then, its state will change to FAILED and an
// IllegalStateException will be thrown.
subscriber.awaitTerminated(90, TimeUnit.SECONDS);
} catch (TimeoutException t) {
// Shut down the subscriber. This will change the state of the subscriber to TERMINATED.
subscriber.stopAsync().awaitTerminated();
System.out.println("Subscriber is shut down: " + subscriber.state());
}
return result;
}
}