com.google.cloud.spanner.spi.v1

Interface SpannerRpc.StreamingCall

Enclosing interface:

SpannerRpc

public static interface SpannerRpc.StreamingCall

Handle for cancellation of a streaming read or query call.

Method Summary

Modifier and Type	Method and Description
void	cancel(String message) Cancels the call.
void	request(int numMessages) Requests more messages from the stream.

Method Detail

request

void request(int numMessages)

Requests more messages from the stream. We disable the auto flow control mechanisam in grpc, so we need to request messages ourself. This gives us more control over how much buffer we maintain in the client. Grpc will request 1 initial message automatically so we don't need to call this at the beginning. After that it should be called whenever there is a flow control window available based on the flow control setting configured by the client. Currently we do not have any flow control so this is called automatically when a message is received.

cancel

void cancel(@Nullable
            String message)

Cancels the call.

Parameters:

message - a message to use in the final status of any underlying RPC