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log.go
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log.go
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// Copyright 2016 The Cockroach 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. See the AUTHORS file
// for names of contributors.
package grpcutil
import (
"regexp"
"strings"
"time"
"github.com/petermattis/goid"
"golang.org/x/net/context"
"google.golang.org/grpc/grpclog"
"github.com/cockroachdb/cockroach/pkg/util/log"
"github.com/cockroachdb/cockroach/pkg/util/syncutil"
"github.com/cockroachdb/cockroach/pkg/util/timeutil"
)
func init() {
grpclog.SetLogger(&logger{})
}
// NB: This interface is implemented by a pointer because using a value causes
// a synthetic stack frame to be inserted on calls to the interface methods.
// Specifically, we get a stack frame that appears as "<autogenerated>", which
// is not useful in logs.
//
// Also NB: we pass a depth of 2 here because all logging calls originate from
// the logging adapter file in grpc, which is an additional stack frame away
// from the actual logging site.
var _ grpclog.Logger = (*logger)(nil)
type logger struct{}
func (*logger) Fatal(args ...interface{}) {
log.FatalfDepth(context.TODO(), 2, "", args...)
}
func (*logger) Fatalf(format string, args ...interface{}) {
log.FatalfDepth(context.TODO(), 2, format, args...)
}
func (*logger) Fatalln(args ...interface{}) {
log.FatalfDepth(context.TODO(), 2, "", args...)
}
func (*logger) Print(args ...interface{}) {
log.InfofDepth(context.TODO(), 2, "", args...)
}
// https://github.com/grpc/grpc-go/blob/955c867/clientconn.go#L836
var (
transportFailedRe = regexp.MustCompile("^" + regexp.QuoteMeta("grpc: addrConn.resetTransport failed to create client transport:"))
connectionRefusedRe = regexp.MustCompile(
strings.Join([]string{
// *nix
regexp.QuoteMeta("connection refused"),
// Windows
regexp.QuoteMeta("No connection could be made because the target machine actively refused it"),
}, "|"),
)
)
func (*logger) Printf(format string, args ...interface{}) {
if shouldPrint(transportFailedRe, connectionRefusedRe, time.Minute, format, args...) {
log.InfofDepth(context.TODO(), 2, format, args...)
}
}
func (*logger) Println(args ...interface{}) {
log.InfofDepth(context.TODO(), 2, "", args...)
}
var spamMu = struct {
syncutil.Mutex
gids map[int64]time.Time
}{
gids: make(map[int64]time.Time),
}
func shouldPrint(
formatRe, argsRe *regexp.Regexp, freq time.Duration, format string, args ...interface{},
) bool {
if formatRe.MatchString(format) {
for _, arg := range args {
if err, ok := arg.(error); ok {
if argsRe.MatchString(err.Error()) {
gid := goid.Get()
now := timeutil.Now()
spamMu.Lock()
t, ok := spamMu.gids[gid]
doPrint := !(ok && now.Sub(t) < freq)
if doPrint {
spamMu.gids[gid] = now
}
spamMu.Unlock()
return doPrint
}
}
}
}
return true
}