ceph-csi/vendor/google.golang.org/grpc/internal/binarylog/sink.go

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2018-11-26 18:23:56 +00:00
/*
*
* Copyright 2018 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 binarylog
import (
"io"
"github.com/golang/protobuf/proto"
pb "google.golang.org/grpc/binarylog/grpc_binarylog_v1"
"google.golang.org/grpc/grpclog"
)
var (
defaultSink Sink = &noopSink{} // TODO(blog): change this default (file in /tmp).
)
// SetDefaultSink sets the sink where binary logs will be written to.
//
// Not thread safe. Only set during initialization.
func SetDefaultSink(s Sink) {
defaultSink = s
}
// Sink writes log entry into the binary log sink.
type Sink interface {
Write(*pb.GrpcLogEntry)
}
type noopSink struct{}
func (ns *noopSink) Write(*pb.GrpcLogEntry) {}
// NewWriterSink creates a binary log sink with the given writer.
func NewWriterSink(w io.Writer) Sink {
return &writerSink{out: w}
}
type writerSink struct {
out io.Writer
}
func (fs *writerSink) Write(e *pb.GrpcLogEntry) {
b, err := proto.Marshal(e)
if err != nil {
grpclog.Infof("binary logging: failed to marshal proto message: %v", err)
}
fs.out.Write(b)
}