feat: api-trace

[govpp.git] / core / trace.go

diff --git a/core/trace.go b/core/trace.go
new file mode 100644 (file)
index 0000000..ea9a57b
--- /dev/null
+++ b/core/trace.go
@@ -0,0 +1,70 @@
+// Copyright (c) 2021 Cisco and/or its affiliates.
+//
+// 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 core
+
+import (
+       "git.fd.io/govpp.git/api"
+       "sort"
+       "sync"
+       "sync/atomic"
+)
+
+// trace is the API tracer object synchronizing and keeping recoded messages.
+type trace struct {
+       list []*api.Record
+       mux  *sync.Mutex
+
+       isEnabled int32
+}
+
+func (c *trace) Enable(enable bool) {
+       if enable && atomic.CompareAndSwapInt32(&c.isEnabled, 0, 1) {
+               log.Debugf("API trace enabled")
+       } else if atomic.CompareAndSwapInt32(&c.isEnabled, 1, 0) {
+               log.Debugf("API trace disabled")
+       }
+}
+
+func (c *trace) GetRecords() (list []*api.Record) {
+       c.mux.Lock()
+       for _, entry := range c.list {
+               list = append(list, entry)
+       }
+       c.mux.Unlock()
+       sort.Slice(list, func(i, j int) bool {
+               return list[i].Timestamp.Before(list[j].Timestamp)
+       })
+       return list
+}
+
+func (c *trace) GetRecordsForChannel(chId uint16) (list []*api.Record) {
+       c.mux.Lock()
+       for _, entry := range c.list {
+               if entry.ChannelID == chId {
+                       list = append(list, entry)
+               }
+       }
+       c.mux.Unlock()
+       sort.Slice(list, func(i, j int) bool {
+               return list[i].Timestamp.Before(list[j].Timestamp)
+       })
+       return list
+}
+
+func (c *trace) Clear() {
+       c.mux.Lock()
+       c.list = make([]*api.Record, 0)
+       c.mux.Unlock()
+}