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.
113 lines
2.7 KiB
Go
113 lines
2.7 KiB
Go
/*
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*
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* Copyright 2015 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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"bytes"
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"fmt"
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"io"
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"net"
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"strings"
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"time"
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"golang.org/x/net/trace"
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)
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// EnableTracing controls whether to trace RPCs using the golang.org/x/net/trace package.
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// This should only be set before any RPCs are sent or received by this program.
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var EnableTracing bool
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// methodFamily returns the trace family for the given method.
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// It turns "/pkg.Service/GetFoo" into "pkg.Service".
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func methodFamily(m string) string {
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m = strings.TrimPrefix(m, "/") // remove leading slash
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if i := strings.Index(m, "/"); i >= 0 {
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m = m[:i] // remove everything from second slash
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}
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if i := strings.LastIndex(m, "."); i >= 0 {
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m = m[i+1:] // cut down to last dotted component
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}
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return m
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}
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// traceInfo contains tracing information for an RPC.
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type traceInfo struct {
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tr trace.Trace
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firstLine firstLine
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}
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// firstLine is the first line of an RPC trace.
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type firstLine struct {
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client bool // whether this is a client (outgoing) RPC
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remoteAddr net.Addr
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deadline time.Duration // may be zero
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}
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func (f *firstLine) String() string {
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var line bytes.Buffer
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io.WriteString(&line, "RPC: ")
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if f.client {
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io.WriteString(&line, "to")
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} else {
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io.WriteString(&line, "from")
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}
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fmt.Fprintf(&line, " %v deadline:", f.remoteAddr)
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if f.deadline != 0 {
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fmt.Fprint(&line, f.deadline)
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} else {
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io.WriteString(&line, "none")
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}
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return line.String()
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}
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const truncateSize = 100
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func truncate(x string, l int) string {
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if l > len(x) {
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return x
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}
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return x[:l]
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}
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// payload represents an RPC request or response payload.
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type payload struct {
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sent bool // whether this is an outgoing payload
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msg interface{} // e.g. a proto.Message
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// TODO(dsymonds): add stringifying info to codec, and limit how much we hold here?
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}
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func (p payload) String() string {
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if p.sent {
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return truncate(fmt.Sprintf("sent: %v", p.msg), truncateSize)
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}
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return truncate(fmt.Sprintf("recv: %v", p.msg), truncateSize)
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}
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type fmtStringer struct {
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format string
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a []interface{}
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}
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func (f *fmtStringer) String() string {
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return fmt.Sprintf(f.format, f.a...)
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}
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type stringer string
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func (s stringer) String() string { return string(s) }
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