2aa18cafc6
With CoreDNS now supporting etcdv3 as the DNS backend, we can update our federation target to etcdv3. Users will now be able to use etcdv3 server as the federation backbone. Minio will update bucket data to etcdv3 and CoreDNS can pick that data up and serve it as bucket style DNS path.
93 lines
3 KiB
Go
93 lines
3 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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// allow interceptor to see all applicable call options, which means those
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// configured as defaults from dial option as well as per-call options
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opts = combine(cc.dopts.callOptions, opts)
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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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func combine(o1 []CallOption, o2 []CallOption) []CallOption {
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// we don't use append because o1 could have extra capacity whose
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// elements would be overwritten, which could cause inadvertent
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// sharing (and race connditions) between concurrent calls
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if len(o1) == 0 {
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return o2
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} else if len(o2) == 0 {
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return o1
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}
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ret := make([]CallOption, len(o1)+len(o2))
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copy(ret, o1)
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copy(ret[len(o1):], o2)
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return ret
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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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