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authorGravatar Miek Gieben <miek@miek.nl> 2017-08-28 17:49:28 +0200
committerGravatar Yong Tang <yong.tang.github@outlook.com> 2017-08-28 08:49:28 -0700
commit7e63bdbee8340d3ce2d2488f93d0fb1d4d16a201 (patch)
tree2734029ca19d1a21794ffc65299c0d57254f5352 /vendor/google.golang.org/grpc/stream.go
parent558f4bea41e0493dd4b0e6d0f73b0220a39d1e67 (diff)
downloadcoredns-7e63bdbee8340d3ce2d2488f93d0fb1d4d16a201.tar.gz
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coredns-7e63bdbee8340d3ce2d2488f93d0fb1d4d16a201.zip
dep ensure -update (#1001)
* dep ensure -update Run "dep ensure -update` to update all dependencies. No code changes; just the dependencies. * dep prune * add new venderod
Diffstat (limited to 'vendor/google.golang.org/grpc/stream.go')
-rw-r--r--vendor/google.golang.org/grpc/stream.go180
1 files changed, 104 insertions, 76 deletions
diff --git a/vendor/google.golang.org/grpc/stream.go b/vendor/google.golang.org/grpc/stream.go
index 33f1c787b..1c621ba87 100644
--- a/vendor/google.golang.org/grpc/stream.go
+++ b/vendor/google.golang.org/grpc/stream.go
@@ -1,33 +1,18 @@
/*
*
- * Copyright 2014, Google Inc.
- * All rights reserved.
+ * Copyright 2014 gRPC authors.
*
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
*
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
+ * http://www.apache.org/licenses/LICENSE-2.0
*
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
*
*/
@@ -44,6 +29,7 @@ import (
"golang.org/x/net/trace"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/metadata"
+ "google.golang.org/grpc/peer"
"google.golang.org/grpc/stats"
"google.golang.org/grpc/status"
"google.golang.org/grpc/transport"
@@ -73,11 +59,17 @@ type Stream interface {
// side. On server side, it simply returns the error to the caller.
// SendMsg is called by generated code. Also Users can call SendMsg
// directly when it is really needed in their use cases.
+ // It's safe to have a goroutine calling SendMsg and another goroutine calling
+ // recvMsg on the same stream at the same time.
+ // But it is not safe to call SendMsg on the same stream in different goroutines.
SendMsg(m interface{}) error
// RecvMsg blocks until it receives a message or the stream is
// done. On client side, it returns io.EOF when the stream is done. On
// any other error, it aborts the stream and returns an RPC status. On
// server side, it simply returns the error to the caller.
+ // It's safe to have a goroutine calling SendMsg and another goroutine calling
+ // recvMsg on the same stream at the same time.
+ // But it is not safe to call RecvMsg on the same stream in different goroutines.
RecvMsg(m interface{}) error
}
@@ -93,6 +85,11 @@ type ClientStream interface {
// CloseSend closes the send direction of the stream. It closes the stream
// when non-nil error is met.
CloseSend() error
+ // Stream.SendMsg() may return a non-nil error when something wrong happens sending
+ // the request. The returned error indicates the status of this sending, not the final
+ // status of the RPC.
+ // Always call Stream.RecvMsg() to get the final status if you care about the status of
+ // the RPC.
Stream
}
@@ -113,25 +110,39 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
cancel context.CancelFunc
)
c := defaultCallInfo
- if mc, ok := cc.getMethodConfig(method); ok {
- c.failFast = !mc.WaitForReady
- if mc.Timeout > 0 {
- ctx, cancel = context.WithTimeout(ctx, mc.Timeout)
- }
+ mc := cc.GetMethodConfig(method)
+ if mc.WaitForReady != nil {
+ c.failFast = !*mc.WaitForReady
+ }
+
+ if mc.Timeout != nil {
+ ctx, cancel = context.WithTimeout(ctx, *mc.Timeout)
}
+
+ opts = append(cc.dopts.callOptions, opts...)
for _, o := range opts {
if err := o.before(&c); err != nil {
return nil, toRPCErr(err)
}
}
+ c.maxSendMessageSize = getMaxSize(mc.MaxReqSize, c.maxSendMessageSize, defaultClientMaxSendMessageSize)
+ c.maxReceiveMessageSize = getMaxSize(mc.MaxRespSize, c.maxReceiveMessageSize, defaultClientMaxReceiveMessageSize)
+
callHdr := &transport.CallHdr{
Host: cc.authority,
Method: method,
- Flush: desc.ServerStreams && desc.ClientStreams,
+ // If it's not client streaming, we should already have the request to be sent,
+ // so we don't flush the header.
+ // If it's client streaming, the user may never send a request or send it any
+ // time soon, so we ask the transport to flush the header.
+ Flush: desc.ClientStreams,
}
if cc.dopts.cp != nil {
callHdr.SendCompress = cc.dopts.cp.Type()
}
+ if c.creds != nil {
+ callHdr.Creds = c.creds
+ }
var trInfo traceInfo
if EnableTracing {
trInfo.tr = trace.New("grpc.Sent."+methodFamily(method), method)
@@ -154,24 +165,24 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
ctx = newContextWithRPCInfo(ctx)
sh := cc.dopts.copts.StatsHandler
if sh != nil {
- ctx = sh.TagRPC(ctx, &stats.RPCTagInfo{FullMethodName: method})
+ ctx = sh.TagRPC(ctx, &stats.RPCTagInfo{FullMethodName: method, FailFast: c.failFast})
begin := &stats.Begin{
Client: true,
BeginTime: time.Now(),
FailFast: c.failFast,
}
sh.HandleRPC(ctx, begin)
- }
- defer func() {
- if err != nil && sh != nil {
- // Only handle end stats if err != nil.
- end := &stats.End{
- Client: true,
- Error: err,
+ defer func() {
+ if err != nil {
+ // Only handle end stats if err != nil.
+ end := &stats.End{
+ Client: true,
+ Error: err,
+ }
+ sh.HandleRPC(ctx, end)
}
- sh.HandleRPC(ctx, end)
- }
- }()
+ }()
+ }
gopts := BalancerGetOptions{
BlockingWait: !c.failFast,
}
@@ -211,15 +222,18 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
}
break
}
+ // Set callInfo.peer object from stream's context.
+ if peer, ok := peer.FromContext(s.Context()); ok {
+ c.peer = peer
+ }
cs := &clientStream{
- opts: opts,
- c: c,
- desc: desc,
- codec: cc.dopts.codec,
- cp: cc.dopts.cp,
- dc: cc.dopts.dc,
- maxMsgSize: cc.dopts.maxMsgSize,
- cancel: cancel,
+ opts: opts,
+ c: c,
+ desc: desc,
+ codec: cc.dopts.codec,
+ cp: cc.dopts.cp,
+ dc: cc.dopts.dc,
+ cancel: cancel,
put: put,
t: t,
@@ -263,18 +277,17 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
// clientStream implements a client side Stream.
type clientStream struct {
- opts []CallOption
- c callInfo
- t transport.ClientTransport
- s *transport.Stream
- p *parser
- desc *StreamDesc
- codec Codec
- cp Compressor
- cbuf *bytes.Buffer
- dc Decompressor
- maxMsgSize int
- cancel context.CancelFunc
+ opts []CallOption
+ c callInfo
+ t transport.ClientTransport
+ s *transport.Stream
+ p *parser
+ desc *StreamDesc
+ codec Codec
+ cp Compressor
+ cbuf *bytes.Buffer
+ dc Decompressor
+ cancel context.CancelFunc
tracing bool // set to EnableTracing when the clientStream is created.
@@ -356,7 +369,13 @@ func (cs *clientStream) SendMsg(m interface{}) (err error) {
}
}()
if err != nil {
- return Errorf(codes.Internal, "grpc: %v", err)
+ return err
+ }
+ if cs.c.maxSendMessageSize == nil {
+ return Errorf(codes.Internal, "callInfo maxSendMessageSize field uninitialized(nil)")
+ }
+ if len(out) > *cs.c.maxSendMessageSize {
+ return Errorf(codes.ResourceExhausted, "trying to send message larger than max (%d vs. %d)", len(out), *cs.c.maxSendMessageSize)
}
err = cs.t.Write(cs.s, out, &transport.Options{Last: false})
if err == nil && outPayload != nil {
@@ -373,7 +392,10 @@ func (cs *clientStream) RecvMsg(m interface{}) (err error) {
Client: true,
}
}
- err = recv(cs.p, cs.codec, cs.s, cs.dc, m, cs.maxMsgSize, inPayload)
+ if cs.c.maxReceiveMessageSize == nil {
+ return Errorf(codes.Internal, "callInfo maxReceiveMessageSize field uninitialized(nil)")
+ }
+ err = recv(cs.p, cs.codec, cs.s, cs.dc, m, *cs.c.maxReceiveMessageSize, inPayload)
defer func() {
// err != nil indicates the termination of the stream.
if err != nil {
@@ -396,7 +418,10 @@ func (cs *clientStream) RecvMsg(m interface{}) (err error) {
}
// Special handling for client streaming rpc.
// This recv expects EOF or errors, so we don't collect inPayload.
- err = recv(cs.p, cs.codec, cs.s, cs.dc, m, cs.maxMsgSize, nil)
+ if cs.c.maxReceiveMessageSize == nil {
+ return Errorf(codes.Internal, "callInfo maxReceiveMessageSize field uninitialized(nil)")
+ }
+ err = recv(cs.p, cs.codec, cs.s, cs.dc, m, *cs.c.maxReceiveMessageSize, nil)
cs.closeTransportStream(err)
if err == nil {
return toRPCErr(errors.New("grpc: client streaming protocol violation: get <nil>, want <EOF>"))
@@ -521,15 +546,16 @@ type ServerStream interface {
// serverStream implements a server side Stream.
type serverStream struct {
- t transport.ServerTransport
- s *transport.Stream
- p *parser
- codec Codec
- cp Compressor
- dc Decompressor
- cbuf *bytes.Buffer
- maxMsgSize int
- trInfo *traceInfo
+ t transport.ServerTransport
+ s *transport.Stream
+ p *parser
+ codec Codec
+ cp Compressor
+ dc Decompressor
+ cbuf *bytes.Buffer
+ maxReceiveMessageSize int
+ maxSendMessageSize int
+ trInfo *traceInfo
statsHandler stats.Handler
@@ -585,9 +611,11 @@ func (ss *serverStream) SendMsg(m interface{}) (err error) {
}
}()
if err != nil {
- err = Errorf(codes.Internal, "grpc: %v", err)
return err
}
+ if len(out) > ss.maxSendMessageSize {
+ return Errorf(codes.ResourceExhausted, "trying to send message larger than max (%d vs. %d)", len(out), ss.maxSendMessageSize)
+ }
if err := ss.t.Write(ss.s, out, &transport.Options{Last: false}); err != nil {
return toRPCErr(err)
}
@@ -617,7 +645,7 @@ func (ss *serverStream) RecvMsg(m interface{}) (err error) {
if ss.statsHandler != nil {
inPayload = &stats.InPayload{}
}
- if err := recv(ss.p, ss.codec, ss.s, ss.dc, m, ss.maxMsgSize, inPayload); err != nil {
+ if err := recv(ss.p, ss.codec, ss.s, ss.dc, m, ss.maxReceiveMessageSize, inPayload); err != nil {
if err == io.EOF {
return err
}