使用Java協議緩衝區的批量Google數據存儲區查詢

Question

任何人都可以請告訴我如何使用協議緩衝區在Java中執行批量/多個數據存儲區查詢。

Python已批量獲取和放置。但如何在Java？

Answer 1

Cloud Client Library for Java解決了我所有的問題。

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); 

請參閱以下指向下載庫和文檔的鏈接。

請投票支持！

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

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