From 3130e4da1c4fbd9ee976a23be4d80c03cd859be3 Mon Sep 17 00:00:00 2001 From: Gyuho Lee Date: Tue, 22 May 2018 14:11:19 -0700 Subject: [PATCH] vendor: add "go-grpc-middleware/util/backoffutils" Signed-off-by: Gyuho Lee --- Gopkg.lock | 9 +- .../grpc-ecosystem/go-grpc-middleware/LICENSE | 201 ++++++++++++++++++ .../go-grpc-middleware/chain.go | 183 ++++++++++++++++ .../grpc-ecosystem/go-grpc-middleware/doc.go | 69 ++++++ .../util/backoffutils/backoff.go | 23 ++ .../go-grpc-middleware/wrappers.go | 29 +++ vendor/google.golang.org/genproto/regen.go | 123 +++++++++++ 7 files changed, 635 insertions(+), 2 deletions(-) create mode 100644 vendor/github.com/grpc-ecosystem/go-grpc-middleware/LICENSE create mode 100644 vendor/github.com/grpc-ecosystem/go-grpc-middleware/chain.go create mode 100644 vendor/github.com/grpc-ecosystem/go-grpc-middleware/doc.go create mode 100644 vendor/github.com/grpc-ecosystem/go-grpc-middleware/util/backoffutils/backoff.go create mode 100644 vendor/github.com/grpc-ecosystem/go-grpc-middleware/wrappers.go create mode 100644 vendor/google.golang.org/genproto/regen.go diff --git a/Gopkg.lock b/Gopkg.lock index 4b576cc6b..300ebe0da 100644 --- a/Gopkg.lock +++ b/Gopkg.lock @@ -100,6 +100,12 @@ packages = ["."] revision = "4201258b820c74ac8e6922fc9e6b52f71fe46f8d" +[[projects]] + name = "github.com/grpc-ecosystem/go-grpc-middleware" + packages = ["util/backoffutils"] + revision = "c250d6563d4d4c20252cd865923440e829844f4e" + version = "v1.0.0" + [[projects]] name = "github.com/grpc-ecosystem/go-grpc-prometheus" packages = ["."] @@ -353,7 +359,6 @@ "peer", "resolver", "resolver/dns", - "resolver/manual", "resolver/passthrough", "stats", "status", @@ -378,6 +383,6 @@ [solve-meta] analyzer-name = "dep" analyzer-version = 1 - inputs-digest = "9b6e97c6524385aecaa477af059f4f6555b3609d4a283ecf27ac2ad4fbe08f06" + inputs-digest = "40c72e54abdb7d6c044f2f5fabb8fc7ac2eadcab047cc22b28d26b7b145b5e1b" solver-name = "gps-cdcl" solver-version = 1 diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/LICENSE b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/LICENSE new file mode 100644 index 000000000..b2b065037 --- /dev/null +++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/LICENSE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. Definitions. + + "License" shall mean the terms and conditions for use, reproduction, + and distribution as defined by Sections 1 through 9 of this document. + + "Licensor" shall mean the copyright owner or entity authorized by + the copyright owner that is granting the License. + + "Legal Entity" shall mean the union of the acting entity and all + other entities that control, are controlled by, or are under common + control with that entity. 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We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [yyyy] [name of copyright owner] + + 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 + + http://www.apache.org/licenses/LICENSE-2.0 + + 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. \ No newline at end of file diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/chain.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/chain.go new file mode 100644 index 000000000..45a2f5f49 --- /dev/null +++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/chain.go @@ -0,0 +1,183 @@ +// Copyright 2016 Michal Witkowski. All Rights Reserved. +// See LICENSE for licensing terms. + +// gRPC Server Interceptor chaining middleware. + +package grpc_middleware + +import ( + "golang.org/x/net/context" + "google.golang.org/grpc" +) + +// ChainUnaryServer creates a single interceptor out of a chain of many interceptors. +// +// Execution is done in left-to-right order, including passing of context. +// For example ChainUnaryServer(one, two, three) will execute one before two before three, and three +// will see context changes of one and two. +func ChainUnaryServer(interceptors ...grpc.UnaryServerInterceptor) grpc.UnaryServerInterceptor { + n := len(interceptors) + + if n > 1 { + lastI := n - 1 + return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) { + var ( + chainHandler grpc.UnaryHandler + curI int + ) + + chainHandler = func(currentCtx context.Context, currentReq interface{}) (interface{}, error) { + if curI == lastI { + return handler(currentCtx, currentReq) + } + curI++ + resp, err := interceptors[curI](currentCtx, currentReq, info, chainHandler) + curI-- + return resp, err + } + + return interceptors[0](ctx, req, info, chainHandler) + } + } + + if n == 1 { + return interceptors[0] + } + + // n == 0; Dummy interceptor maintained for backward compatibility to avoid returning nil. + return func(ctx context.Context, req interface{}, _ *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) { + return handler(ctx, req) + } +} + +// ChainStreamServer creates a single interceptor out of a chain of many interceptors. +// +// Execution is done in left-to-right order, including passing of context. +// For example ChainUnaryServer(one, two, three) will execute one before two before three. +// If you want to pass context between interceptors, use WrapServerStream. +func ChainStreamServer(interceptors ...grpc.StreamServerInterceptor) grpc.StreamServerInterceptor { + n := len(interceptors) + + if n > 1 { + lastI := n - 1 + return func(srv interface{}, stream grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error { + var ( + chainHandler grpc.StreamHandler + curI int + ) + + chainHandler = func(currentSrv interface{}, currentStream grpc.ServerStream) error { + if curI == lastI { + return handler(currentSrv, currentStream) + } + curI++ + err := interceptors[curI](currentSrv, currentStream, info, chainHandler) + curI-- + return err + } + + return interceptors[0](srv, stream, info, chainHandler) + } + } + + if n == 1 { + return interceptors[0] + } + + // n == 0; Dummy interceptor maintained for backward compatibility to avoid returning nil. + return func(srv interface{}, stream grpc.ServerStream, _ *grpc.StreamServerInfo, handler grpc.StreamHandler) error { + return handler(srv, stream) + } +} + +// ChainUnaryClient creates a single interceptor out of a chain of many interceptors. +// +// Execution is done in left-to-right order, including passing of context. +// For example ChainUnaryClient(one, two, three) will execute one before two before three. +func ChainUnaryClient(interceptors ...grpc.UnaryClientInterceptor) grpc.UnaryClientInterceptor { + n := len(interceptors) + + if n > 1 { + lastI := n - 1 + return func(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error { + var ( + chainHandler grpc.UnaryInvoker + curI int + ) + + chainHandler = func(currentCtx context.Context, currentMethod string, currentReq, currentRepl interface{}, currentConn *grpc.ClientConn, currentOpts ...grpc.CallOption) error { + if curI == lastI { + return invoker(currentCtx, currentMethod, currentReq, currentRepl, currentConn, currentOpts...) + } + curI++ + err := interceptors[curI](currentCtx, currentMethod, currentReq, currentRepl, currentConn, chainHandler, currentOpts...) + curI-- + return err + } + + return interceptors[0](ctx, method, req, reply, cc, chainHandler, opts...) + } + } + + if n == 1 { + return interceptors[0] + } + + // n == 0; Dummy interceptor maintained for backward compatibility to avoid returning nil. + return func(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error { + return invoker(ctx, method, req, reply, cc, opts...) + } +} + +// ChainStreamClient creates a single interceptor out of a chain of many interceptors. +// +// Execution is done in left-to-right order, including passing of context. +// For example ChainStreamClient(one, two, three) will execute one before two before three. +func ChainStreamClient(interceptors ...grpc.StreamClientInterceptor) grpc.StreamClientInterceptor { + n := len(interceptors) + + if n > 1 { + lastI := n - 1 + return func(ctx context.Context, desc *grpc.StreamDesc, cc *grpc.ClientConn, method string, streamer grpc.Streamer, opts ...grpc.CallOption) (grpc.ClientStream, error) { + var ( + chainHandler grpc.Streamer + curI int + ) + + chainHandler = func(currentCtx context.Context, currentDesc *grpc.StreamDesc, currentConn *grpc.ClientConn, currentMethod string, currentOpts ...grpc.CallOption) (grpc.ClientStream, error) { + if curI == lastI { + return streamer(currentCtx, currentDesc, currentConn, currentMethod, currentOpts...) + } + curI++ + stream, err := interceptors[curI](currentCtx, currentDesc, currentConn, currentMethod, chainHandler, currentOpts...) + curI-- + return stream, err + } + + return interceptors[0](ctx, desc, cc, method, chainHandler, opts...) + } + } + + if n == 1 { + return interceptors[0] + } + + // n == 0; Dummy interceptor maintained for backward compatibility to avoid returning nil. + return func(ctx context.Context, desc *grpc.StreamDesc, cc *grpc.ClientConn, method string, streamer grpc.Streamer, opts ...grpc.CallOption) (grpc.ClientStream, error) { + return streamer(ctx, desc, cc, method, opts...) + } +} + +// Chain creates a single interceptor out of a chain of many interceptors. +// +// WithUnaryServerChain is a grpc.Server config option that accepts multiple unary interceptors. +// Basically syntactic sugar. +func WithUnaryServerChain(interceptors ...grpc.UnaryServerInterceptor) grpc.ServerOption { + return grpc.UnaryInterceptor(ChainUnaryServer(interceptors...)) +} + +// WithStreamServerChain is a grpc.Server config option that accepts multiple stream interceptors. +// Basically syntactic sugar. +func WithStreamServerChain(interceptors ...grpc.StreamServerInterceptor) grpc.ServerOption { + return grpc.StreamInterceptor(ChainStreamServer(interceptors...)) +} diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/doc.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/doc.go new file mode 100644 index 000000000..716895036 --- /dev/null +++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/doc.go @@ -0,0 +1,69 @@ +// Copyright 2016 Michal Witkowski. All Rights Reserved. +// See LICENSE for licensing terms. + +/* +`grpc_middleware` is a collection of gRPC middleware packages: interceptors, helpers and tools. + +Middleware + +gRPC is a fantastic RPC middleware, which sees a lot of adoption in the Golang world. However, the +upstream gRPC codebase is relatively bare bones. + +This package, and most of its child packages provides commonly needed middleware for gRPC: +client-side interceptors for retires, server-side interceptors for input validation and auth, +functions for chaining said interceptors, metadata convenience methods and more. + +Chaining + +By default, gRPC doesn't allow one to have more than one interceptor either on the client nor on +the server side. `grpc_middleware` provides convenient chaining methods + +Simple way of turning a multiple interceptors into a single interceptor. Here's an example for +server chaining: + + myServer := grpc.NewServer( + grpc.StreamInterceptor(grpc_middleware.ChainStreamServer(loggingStream, monitoringStream, authStream)), + grpc.UnaryInterceptor(grpc_middleware.ChainUnaryServer(loggingUnary, monitoringUnary, authUnary), + ) + +These interceptors will be executed from left to right: logging, monitoring and auth. + +Here's an example for client side chaining: + + clientConn, err = grpc.Dial( + address, + grpc.WithUnaryInterceptor(grpc_middleware.ChainUnaryClient(monitoringClientUnary, retryUnary)), + grpc.WithStreamInterceptor(grpc_middleware.ChainStreamClient(monitoringClientStream, retryStream)), + ) + client = pb_testproto.NewTestServiceClient(clientConn) + resp, err := client.PingEmpty(s.ctx, &myservice.Request{Msg: "hello"}) + +These interceptors will be executed from left to right: monitoring and then retry logic. + +The retry interceptor will call every interceptor that follows it whenever when a retry happens. + +Writing Your Own + +Implementing your own interceptor is pretty trivial: there are interfaces for that. But the interesting +bit exposing common data to handlers (and other middleware), similarly to HTTP Middleware design. +For example, you may want to pass the identity of the caller from the auth interceptor all the way +to the handling function. + +For example, a client side interceptor example for auth looks like: + + func FakeAuthUnaryInterceptor(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) { + newCtx := context.WithValue(ctx, "user_id", "john@example.com") + return handler(newCtx, req) + } + +Unfortunately, it's not as easy for streaming RPCs. These have the `context.Context` embedded within +the `grpc.ServerStream` object. To pass values through context, a wrapper (`WrappedServerStream`) is +needed. For example: + + func FakeAuthStreamingInterceptor(srv interface{}, stream grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error { + newStream := grpc_middleware.WrapServerStream(stream) + newStream.WrappedContext = context.WithValue(ctx, "user_id", "john@example.com") + return handler(srv, stream) + } +*/ +package grpc_middleware diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/util/backoffutils/backoff.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/util/backoffutils/backoff.go new file mode 100644 index 000000000..10aa7f96c --- /dev/null +++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/util/backoffutils/backoff.go @@ -0,0 +1,23 @@ +// Copyright 2016 Michal Witkowski. All Rights Reserved. +// See LICENSE for licensing terms. + +/* +Backoff Helper Utilities + +Implements common backoff features. +*/ +package backoffutils + +import ( + "math/rand" + "time" +) + +// JitterUp adds random jitter to the duration. +// +// This adds or substracts time from the duration within a given jitter fraction. +// For example for 10s and jitter 0.1, it will returna time within [9s, 11s]) +func JitterUp(duration time.Duration, jitter float64) time.Duration { + multiplier := jitter * (rand.Float64()*2 - 1) + return time.Duration(float64(duration) * (1 + multiplier)) +} diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/wrappers.go b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/wrappers.go new file mode 100644 index 000000000..597b86244 --- /dev/null +++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/wrappers.go @@ -0,0 +1,29 @@ +// Copyright 2016 Michal Witkowski. All Rights Reserved. +// See LICENSE for licensing terms. + +package grpc_middleware + +import ( + "golang.org/x/net/context" + "google.golang.org/grpc" +) + +// WrappedServerStream is a thin wrapper around grpc.ServerStream that allows modifying context. +type WrappedServerStream struct { + grpc.ServerStream + // WrappedContext is the wrapper's own Context. You can assign it. + WrappedContext context.Context +} + +// Context returns the wrapper's WrappedContext, overwriting the nested grpc.ServerStream.Context() +func (w *WrappedServerStream) Context() context.Context { + return w.WrappedContext +} + +// WrapServerStream returns a ServerStream that has the ability to overwrite context. +func WrapServerStream(stream grpc.ServerStream) *WrappedServerStream { + if existing, ok := stream.(*WrappedServerStream); ok { + return existing + } + return &WrappedServerStream{ServerStream: stream, WrappedContext: stream.Context()} +} diff --git a/vendor/google.golang.org/genproto/regen.go b/vendor/google.golang.org/genproto/regen.go new file mode 100644 index 000000000..9c906f209 --- /dev/null +++ b/vendor/google.golang.org/genproto/regen.go @@ -0,0 +1,123 @@ +// Copyright 2016 Google Inc. +// +// 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 +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// 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. + +// +build ignore + +// Regen.go regenerates the genproto repository. +// +// Regen.go recursively walks through each directory named by given arguments, +// looking for all .proto files. (Symlinks are not followed.) +// If the pkg_prefix flag is not an empty string, +// any proto file without `go_package` option +// or whose option does not begin with the prefix is ignored. +// Protoc is executed on remaining files, +// one invocation per set of files declaring the same Go package. +package main + +import ( + "flag" + "fmt" + "io/ioutil" + "log" + "os" + "os/exec" + "path/filepath" + "regexp" + "strconv" + "strings" +) + +var goPkgOptRe = regexp.MustCompile(`(?m)^option go_package = (.*);`) + +func usage() { + fmt.Fprintln(os.Stderr, `usage: go run regen.go -go_out=path/to/output [-pkg_prefix=pkg/prefix] roots... + +Most users will not need to run this file directly. +To regenerate this repository, run regen.sh instead.`) + flag.PrintDefaults() +} + +func main() { + goOutDir := flag.String("go_out", "", "go_out argument to pass to protoc-gen-go") + pkgPrefix := flag.String("pkg_prefix", "", "only include proto files with go_package starting with this prefix") + flag.Usage = usage + flag.Parse() + + if *goOutDir == "" { + log.Fatal("need go_out flag") + } + + pkgFiles := make(map[string][]string) + walkFn := func(path string, info os.FileInfo, err error) error { + if err != nil { + return err + } + if !info.Mode().IsRegular() || !strings.HasSuffix(path, ".proto") { + return nil + } + pkg, err := goPkg(path) + if err != nil { + return err + } + pkgFiles[pkg] = append(pkgFiles[pkg], path) + return nil + } + for _, root := range flag.Args() { + if err := filepath.Walk(root, walkFn); err != nil { + log.Fatal(err) + } + } + for pkg, fnames := range pkgFiles { + if !strings.HasPrefix(pkg, *pkgPrefix) { + continue + } + if out, err := protoc(*goOutDir, flag.Args(), fnames); err != nil { + log.Fatalf("error executing protoc: %s\n%s", err, out) + } + } +} + +// goPkg reports the import path declared in the given file's +// `go_package` option. If the option is missing, goPkg returns empty string. +func goPkg(fname string) (string, error) { + content, err := ioutil.ReadFile(fname) + if err != nil { + return "", err + } + + var pkgName string + if match := goPkgOptRe.FindSubmatch(content); len(match) > 0 { + pn, err := strconv.Unquote(string(match[1])) + if err != nil { + return "", err + } + pkgName = pn + } + if p := strings.IndexRune(pkgName, ';'); p > 0 { + pkgName = pkgName[:p] + } + return pkgName, nil +} + +// protoc executes the "protoc" command on files named in fnames, +// passing go_out and include flags specified in goOut and includes respectively. +// protoc returns combined output from stdout and stderr. +func protoc(goOut string, includes, fnames []string) ([]byte, error) { + args := []string{"--go_out=plugins=grpc:" + goOut} + for _, inc := range includes { + args = append(args, "-I", inc) + } + args = append(args, fnames...) + return exec.Command("protoc", args...).CombinedOutput() +}