使用Java协议缓冲区的批量Google数据存储区查询

Question

任何人都可以请告诉我如何使用协议缓冲区在Java中执行批量/多个数据存储区查询。

Python已批量获取和放置。但如何在Java？

Answer 1

Cloud Client Library for Java解决了我所有的问题。

Datastore datastore; 
DatastoreOptions options = DatastoreOptions.newBuilder().setProjectId("yourprojectID").setCredentials(GoogleCredentials.fromStream(new FileInputStream("localKeyFile.json"))).build(); 
dataStore = options.getService(); 

List<Key> queryKeys = new ArrayList<>(); 
Key key = datastore.newKeyFactory().setKind("SomeKind").newKey(1234L); 
queryKeys.add(key); 

// Add more keys if you need to the List..then start query! 

Iterable<Key> keyIterable = queryKeys; 
List<Entity> entities = null; 

// Get Results 

entities = dataStore.fetch(keyIterable); 

请参阅以下指向下载库和文档的链接。

请投票支持！

http://googlecloudplatform.github.io/google-cloud-java/0.21.1/index.html

而且Docs- https://github.com/GoogleCloudPlatform/google-cloud-java