How to put/get multiple entities at once in Google cloud Datastore using java -

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In this, I did not know how to put or retrieve many entities at one go. Further, by using GULL, I was unable to execute such select * questions, from where (key '1', 'key2', 'key3') __ key __

Can someone help me, how do I insert / retrieve many entities once in Java ??

Thanks,

Cloud Datastore, a LookupRequest and CommitRequest allow multiple keys and institutions respectively to specify, for example: 

  LookupRequest request = LookupRequest.newBuilder () .addKey (key1). AddKey (key2) .build ();   
 or:  
  CommitRequest request = CommitRequest.newBuilder () .setMode (CommitRequest.Mode.NON_TRANSACTIONAL) .setMutation (Mutation.newBuilder () .addInsert (Unit 1) .addInsert (entity2)) .build ();   
 These pages are slight variations on the examples given at:  
 Cloud Datastore Jikyuel current  IN  or does not support writing.

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