Package io.grpc

Class ClientInterceptors.CheckedForwardingClientCall<ReqT,​RespT>

    • Constructor Detail

      • CheckedForwardingClientCall

        protected CheckedForwardingClientCall​(ClientCall<ReqT,​RespT> delegate)
    • Method Detail

      • checkedStart

        protected abstract void checkedStart​(ClientCall.Listener<RespT> responseListener,
                                             Metadata headers)
                                      throws Exception
        Subclasses implement the start logic here that would normally belong to start().

        Implementation should call this.delegate().start() in the normal path. Exceptions may safely be thrown prior to calling this.delegate().start(). Such exceptions will be handled by CheckedForwardingClientCall and be delivered to responseListener. Exceptions must not be thrown after calling this.delegate().start(), as this can result in ClientCall.Listener.onClose(io.grpc.Status, io.grpc.Metadata) being called multiple times.

      • request

        public void request​(int numMessages)
        Description copied from class: ClientCall
        Requests up to the given number of messages from the call to be delivered to ClientCall.Listener.onMessage(Object). No additional messages will be delivered.

        Message delivery is guaranteed to be sequential in the order received. In addition, the listener methods will not be accessed concurrently. While it is not guaranteed that the same thread will always be used, it is guaranteed that only a single thread will access the listener at a time.

        If it is desired to bypass inbound flow control, a very large number of messages can be specified (e.g. Integer.MAX_VALUE).

        If called multiple times, the number of messages able to delivered will be the sum of the calls.

        This method is safe to call from multiple threads without external synchronization.

        Specified by:
        request in class ClientCall<ReqT,​RespT>
        numMessages - the requested number of messages to be delivered to the listener. Must be non-negative.
      • cancel

        public void cancel​(@Nullable
                           String message,
                           Throwable cause)
        Description copied from class: ClientCall
        Prevent any further processing for this ClientCall. No further messages may be sent or will be received. The server is informed of cancellations, but may not stop processing the call. Cancellation is permitted even if previously ClientCall.halfClose()d. Cancelling an already cancel()ed ClientCall has no effect.

        No other methods on this class can be called after this method has been called.

        It is recommended that at least one of the arguments to be non-null, to provide useful debug information. Both argument being null may log warnings and result in suboptimal performance. Also note that the provided information will not be sent to the server.

        Specified by:
        cancel in class ClientCall<ReqT,​RespT>
        message - if not null, will appear as the description of the CANCELLED status
        cause - if not null, will appear as the cause of the CANCELLED status
      • halfClose

        public void halfClose()
        Description copied from class: ClientCall
        Close the call for request message sending. Incoming response messages are unaffected. This should be called when no more messages will be sent from the client.
        Specified by:
        halfClose in class ClientCall<ReqT,​RespT>
      • setMessageCompression

        public void setMessageCompression​(boolean enabled)
        Description copied from class: ClientCall
        Enables per-message compression, if an encoding type has been negotiated. If no message encoding has been negotiated, this is a no-op. By default per-message compression is enabled, but may not have any effect if compression is not enabled on the call.
        setMessageCompression in class ClientCall<ReqT,​RespT>
      • isReady

        public boolean isReady()
        Description copied from class: ClientCall
        If true, indicates that the call is capable of sending additional messages without requiring excessive buffering internally. This event is just a suggestion and the application is free to ignore it, however doing so may result in excessive buffering within the call.

        If false, ClientCall.Listener.onReady() will be called after isReady() transitions to true.

        If the type of the call is either MethodDescriptor.MethodType.UNARY or MethodDescriptor.MethodType.SERVER_STREAMING, this method may persistently return false. Calls that send exactly one message should not check this method.

        This abstract class's implementation always returns true. Implementations generally override the method.

        isReady in class ClientCall<ReqT,​RespT>