引起：io.grpc.StatusRuntimeException：NOT_FOUND：找不到資源

Question

我嘗試編寫pubsub的測試：

@Test
public void sendTopic() throws Exception {

    CustomSubscriber customSubscriber = new CustomSubscriber();
    customSubscriber.startAndWait();

    CustomPublisher customPublisher = new CustomPublisher();
    customPublisher.publish("123");
}

和：

public CustomSubscriber() {
    this.subscriptionName = SubscriptionName.create(SdkServiceConfig.s.GCP_PROJECT_ID, SdkServiceConfig.s.TOPIC_ID );
    this.receiveMsgAction = (message, consumer) -> {
        // handle incoming message, then ack/nack the received message
        System.out.println("Id : " + message.getMessageId());
        System.out.println("Data : " + message.getData().toStringUtf8());
        consumer.ack();
    };
    this.afterStopAction = new ApiFutureEmpty();
}

// [TARGET startAsync()]
public void startAndWait() throws Exception {
    Subscriber subscriber = createSubscriberWithCustomCredentials();
    subscriber.startAsync();

    // Wait for a stop signal.
    afterStopAction.get();
    subscriber.stopAsync().awaitTerminated();
}

和：

public ApiFuture<String> publish(String message) throws Exception {
    ByteString data = ByteString.copyFromUtf8(message);
    PubsubMessage pubsubMessage = PubsubMessage.newBuilder().setData(data).build();
    ApiFuture<String> messageIdFuture = publisher.publish(pubsubMessage);

    ApiFutures.addCallback(messageIdFuture, new ApiFutureCallback<String>() {
        public void onSuccess(String messageId) {
            System.out.println("published with message id: " + messageId);
        }

        public void onFailure(Throwable t) {
            System.out.println("failed to publish: " + t);
        }
    });
    return messageIdFuture;
}

/**
 * Example of creating a {@code Publisher}.
 */
// [TARGET newBuilder(TopicName)]
// [VARIABLE "my_project"]
// [VARIABLE "my_topic"]
public void createPublisher(String projectId, String topicId) throws Exception {
    TopicName topic = TopicName.create(projectId, topicId);
    try {
        publisher = createPublisherWithCustomCredentials(topic);

    } finally {
        // When finished with the publisher, make sure to shutdown to free up resources.
        publisher.shutdown();
    }
}

當我運行代碼時，我收到此錯誤：

Caused by: io.grpc.StatusRuntimeException: NOT_FOUND: Resource not found (resource=add-partner-request).

我錯過了什么？

Answer 1

無論什么實體被命名為“add-partner-request”都沒有成功創建或不屬於該項目。 如果“add-partner-request”是主題，那么您實際上需要創建主題; TopicName.create(projectId, topicId)行不足以創建主題本身。 通常，可以在Cloud控制台的Cloud Pub / Sub部分中創建主題，或者通過gcloud命令創建主題，例如，

gcloud pubsub topics create add-partner-request

確保您在控制台中登錄的項目是代碼中使用的項目。 您還應該在通過--project標志創建主題時顯式設置項目，或者驗證默認項目是否正確：

gcloud config list --format='text(core.project)'

對於測試，通常在代碼中創建和刪除。 例如，要創建主題：

Topic topic = null;
ProjectTopicName topicName = ProjectTopicName.of(projectId, topicId);
TopicAdminClient topicAdminClient = TopicAdminClient.create();
try {
  topic = topicAdminClient.createTopic(topicName);
} catch (APIException e) {
  System.out.println("Issue creating topic!");
}

如果“add-partner-request”是訂閱名稱，則適用相同的內容。 gcloud命令會改變一點：

gcloud pubsub subscriptions create add-partner-request --topic=<topic name>

在Java中創建訂閱的命令如下：

Subscription subscription = null;
ProjectTopicName topicName = ProjectTopicName.of(projectId, topicId);
ProjectSubscriptionName subscriptionName = ProjectSubscriptionName.of(projectId, subscriptionId);
SubscriptionAdminClient subscriptionAdminClient = SubscriptionAdminClient.create();
try {
  subscription = subscriptionAdminClient.createSubscription(
          subscriptionName, topicName, PushConfig.newBuilder().build(), 600);
} catch (APIException e) {
  System.out.println("Issue creating topic!");
}

Answer 2

我假設TOPIC_ID是你主題的名字; 你實際上需要引用訂閱。 您可以從GCP控制台輕松創建訂閱，然后在SubscriptionName.create（project，yoursubscriptionname）中引用該名稱

Answer 3

我認為您忘記使用以下名稱“add-partner-request”在項目中創建主題。 您可以使用以下代碼創建它：

try (TopicAdminClient topicAdminClient = TopicAdminClient.create()) {
  // projectId <=  unique project identifier, eg. "my-project-id"
  TopicName topicName = TopicName.create(projectId, "add-partner-request");
  Topic topic = topicAdminClient.createTopic(topicName);
  return topic;
}