管理分页

Java 库中的大多数列表方法都会返回 Google Cloud PagedResponse 对象。这样，您就可以迭代处理结果，而无需手动管理页面令牌。

处理分页的最简单方法是使用 iterateAll() 方法。当您遍历集合时，该库会在后台自动提取新页面。

import com.google.cloud.secretmanager.v1.ListSecretsRequest;
import com.google.cloud.secretmanager.v1.ProjectName;
import com.google.cloud.secretmanager.v1.Secret;
import com.google.cloud.secretmanager.v1.SecretManagerServiceClient;

try (SecretManagerServiceClient secretManager = SecretManagerServiceClient.create()) {
    // Prepare the request
    ListSecretsRequest request = ListSecretsRequest.newBuilder()
        .setParent(ProjectName.of("my-project").toString())
        .build();

    // Call the API
    // This returns a PagedResponse
    SecretManagerServiceClient.ListSecretsPagedResponse response = secretManager.listSecrets(request);

    // Automatically fetches subsequent pages of secrets
    for (Secret secret : response.iterateAll()) {
        System.out.printf("Secret: %s%n", secret.getName());
    }
}

手动分页（访问令牌）

如果您需要手动控制分页（例如，对于向前端发送令牌的 Web API），可以从响应中访问 nextPageToken。

// Prepare request with page size and optional token
ListSecretsRequest.Builder requestBuilder = ListSecretsRequest.newBuilder()
    .setParent(ProjectName.of("my-project").toString())
    .setPageSize(10);

// Check if we have a token from a previous request (e.g., from a query parameter)
String pageToken = request.getParameter("page_token");
if (pageToken != null) {
    requestBuilder.setPageToken(pageToken);
}

SecretManagerServiceClient.ListSecretsPagedResponse response = secretManager.listSecrets(requestBuilder.build());

// Process current page items
for (Secret secret : response.getPage().getValues()) {
    // Process current page items
}

// Get the token for the next page (empty string if no more pages)
String nextToken = response.getNextPageToken();