| // Copyright 2015 The LUCI 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 monitor |
| |
| import ( |
| "context" |
| "os" |
| |
| "github.com/golang/protobuf/proto" |
| |
| "go.chromium.org/luci/common/clock" |
| "go.chromium.org/luci/common/logging" |
| pb "go.chromium.org/luci/common/tsmon/ts_mon_proto" |
| "go.chromium.org/luci/common/tsmon/types" |
| ) |
| |
| type debugMonitor struct { |
| path string |
| } |
| |
| // NewDebugMonitor returns a Monitor that outputs metrics to a log, and |
| // optionally a file on disk. |
| func NewDebugMonitor(path string) Monitor { |
| return &debugMonitor{ |
| path: path, |
| } |
| } |
| |
| func (m *debugMonitor) ChunkSize() int { |
| return 0 |
| } |
| |
| func (m *debugMonitor) Send(ctx context.Context, cells []types.Cell) error { |
| str := proto.MarshalTextString(&pb.MetricsPayload{ |
| MetricsCollection: SerializeCells(cells, clock.Now(ctx)), |
| }) |
| |
| logging.Infof(ctx, "Sending ts_mon metrics:\n%s", str) |
| |
| if m.path != "" { |
| file, err := os.OpenFile(m.path, os.O_RDWR|os.O_APPEND|os.O_CREATE, 0664) |
| if err != nil { |
| logging.Errorf(ctx, "Failed to open file %s: %s", m.path, err) |
| return err |
| } |
| |
| defer func() { |
| if err := file.Close(); err != nil { |
| logging.Errorf(ctx, "Failed to close file %s: %s", m.path, err) |
| } |
| }() |
| |
| if _, err = file.WriteString(str); err != nil { |
| logging.Errorf(ctx, "Failed to write to the file %s: %s", m.path, err) |
| return err |
| } |
| } |
| |
| return nil |
| } |
| |
| func (m *debugMonitor) Close() error { |
| return nil |
| } |