mirror of
https://gitlab.com/arm-research/smarter/smarter-device-manager.git
synced 2024-11-22 10:43:55 +00:00
114 lines
2.7 KiB
Go
114 lines
2.7 KiB
Go
/*
|
|
*
|
|
* Copyright 2015 gRPC authors.
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
package grpc
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"io"
|
|
"net"
|
|
"strings"
|
|
"time"
|
|
|
|
"golang.org/x/net/trace"
|
|
)
|
|
|
|
// EnableTracing controls whether to trace RPCs using the golang.org/x/net/trace package.
|
|
// This should only be set before any RPCs are sent or received by this program.
|
|
var EnableTracing bool
|
|
|
|
// methodFamily returns the trace family for the given method.
|
|
// It turns "/pkg.Service/GetFoo" into "pkg.Service".
|
|
func methodFamily(m string) string {
|
|
m = strings.TrimPrefix(m, "/") // remove leading slash
|
|
if i := strings.Index(m, "/"); i >= 0 {
|
|
m = m[:i] // remove everything from second slash
|
|
}
|
|
if i := strings.LastIndex(m, "."); i >= 0 {
|
|
m = m[i+1:] // cut down to last dotted component
|
|
}
|
|
return m
|
|
}
|
|
|
|
// traceInfo contains tracing information for an RPC.
|
|
type traceInfo struct {
|
|
tr trace.Trace
|
|
firstLine firstLine
|
|
}
|
|
|
|
// firstLine is the first line of an RPC trace.
|
|
type firstLine struct {
|
|
client bool // whether this is a client (outgoing) RPC
|
|
remoteAddr net.Addr
|
|
deadline time.Duration // may be zero
|
|
}
|
|
|
|
func (f *firstLine) String() string {
|
|
var line bytes.Buffer
|
|
io.WriteString(&line, "RPC: ")
|
|
if f.client {
|
|
io.WriteString(&line, "to")
|
|
} else {
|
|
io.WriteString(&line, "from")
|
|
}
|
|
fmt.Fprintf(&line, " %v deadline:", f.remoteAddr)
|
|
if f.deadline != 0 {
|
|
fmt.Fprint(&line, f.deadline)
|
|
} else {
|
|
io.WriteString(&line, "none")
|
|
}
|
|
return line.String()
|
|
}
|
|
|
|
const truncateSize = 100
|
|
|
|
func truncate(x string, l int) string {
|
|
if l > len(x) {
|
|
return x
|
|
}
|
|
return x[:l]
|
|
}
|
|
|
|
// payload represents an RPC request or response payload.
|
|
type payload struct {
|
|
sent bool // whether this is an outgoing payload
|
|
msg interface{} // e.g. a proto.Message
|
|
// TODO(dsymonds): add stringifying info to codec, and limit how much we hold here?
|
|
}
|
|
|
|
func (p payload) String() string {
|
|
if p.sent {
|
|
return truncate(fmt.Sprintf("sent: %v", p.msg), truncateSize)
|
|
}
|
|
return truncate(fmt.Sprintf("recv: %v", p.msg), truncateSize)
|
|
}
|
|
|
|
type fmtStringer struct {
|
|
format string
|
|
a []interface{}
|
|
}
|
|
|
|
func (f *fmtStringer) String() string {
|
|
return fmt.Sprintf(f.format, f.a...)
|
|
}
|
|
|
|
type stringer string
|
|
|
|
func (s stringer) String() string { return string(s) }
|