feat(PubSub): Add create_topic_with_confluent_cloud_ingestion sample (#2094)

Author: cy-yun

pubsub/api/src/create_topic_with_confluent_cloud_ingestion.php

@@ -0,0 +1,70 @@
+<?php
+
+/**
+ * Copyright 2025 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.
+ */
+
+/**
+ * For instructions on how to run the full sample:
+ *
+ * @see https://github.com/GoogleCloudPlatform/php-docs-samples/blob/main/pubsub/api/README.md
+ */
+
+namespace Google\Cloud\Samples\PubSub;
+
+# [START pubsub_create_topic_with_confluent_cloud_ingestion]
+use Google\Cloud\PubSub\PubSubClient;
+
+/**
+ * Creates a Pub/Sub topic with Confluent Cloud ingestion.
+ *
+ * @param string $projectId  The Google project ID.
+ * @param string $topicName  The Pub/Sub topic name.
+ * @param string $bootstrapServer  The address of the bootstrap server. The format is url:port.
+ * @param string $clusterId  The id of the cluster.
+ * @param string $confluentTopic  The name of the topic in the Confluent Cloud cluster that Pub/Sub will import from.
+ * @param string $identityPoolId  The id of the identity pool to be used for Federated Identity authentication with Confluent Cloud.
+ * @param string $gcpServiceAccount  The GCP service account to be used for Federated Identity authentication with identity_pool_id.
+ */
+function create_topic_with_confluent_cloud_ingestion(
+    string $projectId,
+    string $topicName,
+    string $bootstrapServer,
+    string $clusterId,
+    string $confluentTopic,
+    string $identityPoolId,
+    string $gcpServiceAccount
+): void {
+    $pubsub = new PubSubClient([
+        'projectId' => $projectId,
+    ]);
+
+    $topic = $pubsub->createTopic($topicName, [
+        'ingestionDataSourceSettings' => [
+            'confluent_cloud' => [
+                'bootstrap_server' => $bootstrapServer,
+                'cluster_id' => $clusterId,
+                'topic' => $confluentTopic,
+                'identity_pool_id' => $identityPoolId,
+                'gcp_service_account' => $gcpServiceAccount
+            ]
+        ]
+    ]);
+
+    printf('Topic created: %s' . PHP_EOL, $topic->name());
+}
+# [END pubsub_create_topic_with_confluent_cloud_ingestion]
+require_once __DIR__ . '/../../../testing/sample_helpers.php';
+\Google\Cloud\Samples\execute_sample(__FILE__, __NAMESPACE__, $argv);

pubsub/api/test/pubsubTest.php

@@ -673,4 +673,29 @@ public function testCreateTopicWithAwsMskIngestion()
         $this->assertMatchesRegularExpression('/Topic deleted:/', $output);
         $this->assertMatchesRegularExpression(sprintf('/%s/', $topic), $output);
     }
+
+    public function testCreateTopicWithConfluentCloudIngestion()
+    {
+        $this->requireEnv('PUBSUB_EMULATOR_HOST');
+
+        $topic = 'test-topic-' . rand();
+        $output = $this->runFunctionSnippet('create_topic_with_confluent_cloud_ingestion', [
+            self::$projectId,
+            $topic,
+            'fake-bootstrap-server-id.us-south1.gcp.confluent.cloud:9092',
+            'fake-cluster-id',
+            'fake-confluent-topic-name',
+            'fake-identity-pool-id',
+            self::$gcpServiceAccount
+        ]);
+        $this->assertMatchesRegularExpression('/Topic created:/', $output);
+        $this->assertMatchesRegularExpression(sprintf('/%s/', $topic), $output);
+
+        $output = $this->runFunctionSnippet('delete_topic', [
+            self::$projectId,
+            $topic,
+        ]);
+        $this->assertMatchesRegularExpression('/Topic deleted:/', $output);
+        $this->assertMatchesRegularExpression(sprintf('/%s/', $topic), $output);
+    }
 }