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UpdateTopicSchemaExample.java
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UpdateTopicSchemaExample.java
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/*
* Copyright 2023 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 pubsub;
// [START pubsub_update_topic_schema]
import com.google.cloud.pubsub.v1.TopicAdminClient;
import com.google.protobuf.FieldMask;
import com.google.pubsub.v1.SchemaSettings;
import com.google.pubsub.v1.Topic;
import com.google.pubsub.v1.TopicName;
import com.google.pubsub.v1.UpdateTopicRequest;
import java.io.IOException;
public class UpdateTopicSchemaExample {
public static void main(String... args) throws Exception {
// TODO(developer): Replace these variables before running the sample.
String projectId = "your-project-id";
// This is an existing topic that has schema settings attached to it.
String topicId = "your-topic-id";
// Set the minimum and maximum revsion ID
String firstRevisionId = "your-revision-id";
String lastRevisionId = "your-revision-id";
UpdateTopicSchemaExample.updateTopicSchemaExample(
projectId, topicId, firstRevisionId, lastRevisionId);
}
public static void updateTopicSchemaExample(
String projectId, String topicId, String firstRevisionid, String lastRevisionId)
throws IOException {
try (TopicAdminClient topicAdminClient = TopicAdminClient.create()) {
TopicName topicName = TopicName.of(projectId, topicId);
// Construct the schema settings with the changes you want to make.
SchemaSettings schemaSettings =
SchemaSettings.newBuilder()
.setFirstRevisionId(firstRevisionid)
.setLastRevisionId(lastRevisionId)
.build();
// Construct the topic with the schema settings you want to change.
Topic topic =
Topic.newBuilder()
.setName(topicName.toString())
.setSchemaSettings(schemaSettings)
.build();
// Construct a field mask to indicate which field to update in the topic.
FieldMask updateMask =
FieldMask.newBuilder()
.addPaths("schema_settings.first_revision_id")
.addPaths("schema_settings.last_revision_id")
.build();
UpdateTopicRequest request =
UpdateTopicRequest.newBuilder().setTopic(topic).setUpdateMask(updateMask).build();
Topic response = topicAdminClient.updateTopic(request);
System.out.println("Updated topic with schema: " + topic.getName());
}
}
}
// [END pubsub_update_topic_schema]