mirror of https://github.com/grpc/grpc-go.git
120 lines
3.5 KiB
Go
120 lines
3.5 KiB
Go
/*
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*
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* Copyright 2015, Google Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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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 = true
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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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// 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 fmt.Sprintf("sent: %v", p.msg)
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}
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return fmt.Sprintf("recv: %v", p.msg)
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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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