forked from intelsdi-x/snap
/
passthru.go
104 lines (83 loc) · 2.65 KB
/
passthru.go
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/*
http://www.apache.org/licenses/LICENSE-2.0.txt
Copyright 2015 Intel Corporation
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 passthru
import (
"bytes"
"encoding/gob"
log "github.com/Sirupsen/logrus"
"github.com/intelsdi-x/snap/control/plugin"
"github.com/intelsdi-x/snap/control/plugin/cpolicy"
"github.com/intelsdi-x/snap/core/ctypes"
)
const (
name = "passthru"
version = 1
pluginType = plugin.ProcessorPluginType
debug = "debug"
)
// Meta returns a plugin meta data
func Meta() *plugin.PluginMeta {
return plugin.NewPluginMeta(name, version, pluginType, []string{plugin.SnapGOBContentType}, []string{plugin.SnapGOBContentType})
}
func NewPassthruProcessor() *passthruProcessor {
return &passthruProcessor{}
}
type passthruProcessor struct{}
func (p *passthruProcessor) GetConfigPolicy() (*cpolicy.ConfigPolicy, error) {
cp := cpolicy.New()
config := cpolicy.NewPolicyNode()
r1, err := cpolicy.NewBoolRule(debug, false)
if err != nil {
panic(err)
}
r1.Description = "Debug mode"
config.Add(r1)
cp.Add([]string{""}, config)
return cp, nil
}
func (p *passthruProcessor) Process(contentType string, content []byte, config map[string]ctypes.ConfigValue) (string, []byte, error) {
log.SetFormatter(&log.TextFormatter{DisableTimestamp: true})
if val, ok := config[debug]; ok && val.(ctypes.ConfigValueBool).Value {
log.SetLevel(log.DebugLevel)
} else {
log.SetLevel(log.InfoLevel)
}
log.Debug("processing started")
// The following block is for testing config see.. control_test.go
if _, ok := config["test"]; ok {
log.Debug("test configuration found")
var metrics []plugin.MetricType
//Decodes the content into MetricType
dec := gob.NewDecoder(bytes.NewBuffer(content))
if err := dec.Decode(&metrics); err != nil {
log.WithFields(log.Fields{
"error": err,
"content": content,
}).Errorf("error decoding")
return "", nil, err
}
for idx, m := range metrics {
if m.Namespace()[0].Value == "foo" {
log.Print("found foo metric")
metrics[idx].Data_ = 2
}
}
var buf bytes.Buffer
enc := gob.NewEncoder(&buf)
enc.Encode(metrics)
content = buf.Bytes()
}
//just passing through
return contentType, content, nil
}