13975c0702
This is pre-work to implementing retry support. Each retry attempt will have its own csAttempt. The fields left in clientStream are the same across all attempts.
75 lines
2.4 KiB
Go
75 lines
2.4 KiB
Go
/*
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*
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* Copyright 2014 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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package grpc
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import (
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"golang.org/x/net/context"
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)
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// Invoke sends the RPC request on the wire and returns after response is
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// received. This is typically called by generated code.
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//
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// All errors returned by Invoke are compatible with the status package.
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func (cc *ClientConn) Invoke(ctx context.Context, method string, args, reply interface{}, opts ...CallOption) error {
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if cc.dopts.unaryInt != nil {
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return cc.dopts.unaryInt(ctx, method, args, reply, cc, invoke, opts...)
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}
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return invoke(ctx, method, args, reply, cc, opts...)
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}
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// Invoke sends the RPC request on the wire and returns after response is
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// received. This is typically called by generated code.
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//
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// DEPRECATED: Use ClientConn.Invoke instead.
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func Invoke(ctx context.Context, method string, args, reply interface{}, cc *ClientConn, opts ...CallOption) error {
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return cc.Invoke(ctx, method, args, reply, opts...)
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}
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var unaryStreamDesc = &StreamDesc{ServerStreams: false, ClientStreams: false}
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func invoke(ctx context.Context, method string, req, reply interface{}, cc *ClientConn, opts ...CallOption) error {
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// TODO: implement retries in clientStream and make this simply
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// newClientStream, SendMsg, RecvMsg.
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firstAttempt := true
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for {
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csInt, err := newClientStream(ctx, unaryStreamDesc, cc, method, opts...)
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if err != nil {
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return err
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}
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cs := csInt.(*clientStream)
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if err := cs.SendMsg(req); err != nil {
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if !cs.c.failFast && cs.attempt.s.Unprocessed() && firstAttempt {
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// TODO: Add a field to header for grpc-transparent-retry-attempts
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firstAttempt = false
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continue
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}
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return err
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}
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if err := cs.RecvMsg(reply); err != nil {
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if !cs.c.failFast && cs.attempt.s.Unprocessed() && firstAttempt {
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// TODO: Add a field to header for grpc-transparent-retry-attempts
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firstAttempt = false
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continue
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}
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return err
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}
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return nil
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}
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}
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