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// SPDX-License-Identifier: GPL-3.0-or-later
package hdfs
import (
"encoding/json"
"errors"
"fmt"
"strings"
"github.com/netdata/netdata/go/go.d.plugin/pkg/stm"
)
func (h *HDFS) collect() (map[string]int64, error) {
var raw rawJMX
err := h.client.doOKWithDecodeJSON(&raw)
if err != nil {
return nil, err
}
if raw.isEmpty() {
return nil, errors.New("empty response")
}
mx := h.collectRawJMX(raw)
return stm.ToMap(mx), nil
}
func (h *HDFS) determineNodeType() (nodeType, error) {
var raw rawJMX
err := h.client.doOKWithDecodeJSON(&raw)
if err != nil {
return "", err
}
if raw.isEmpty() {
return "", errors.New("empty response")
}
jvm := raw.findJvm()
if jvm == nil {
return "", errors.New("couldn't find jvm in response")
}
v, ok := jvm["tag.ProcessName"]
if !ok {
return "", errors.New("couldn't find process name in JvmMetrics")
}
t := nodeType(strings.Trim(string(v), "\""))
if t == nameNodeType || t == dataNodeType {
return t, nil
}
return "", errors.New("unknown node type")
}
func (h *HDFS) collectRawJMX(raw rawJMX) *metrics {
var mx metrics
switch h.nodeType {
default:
panic(fmt.Sprintf("unsupported node type : '%s'", h.nodeType))
case nameNodeType:
h.collectNameNode(&mx, raw)
case dataNodeType:
h.collectDataNode(&mx, raw)
}
return &mx
}
func (h *HDFS) collectNameNode(mx *metrics, raw rawJMX) {
err := h.collectJVM(mx, raw)
if err != nil {
h.Debugf("error on collecting jvm : %v", err)
}
err = h.collectRPCActivity(mx, raw)
if err != nil {
h.Debugf("error on collecting rpc activity : %v", err)
}
err = h.collectFSNameSystem(mx, raw)
if err != nil {
h.Debugf("error on collecting fs name system : %v", err)
}
}
func (h *HDFS) collectDataNode(mx *metrics, raw rawJMX) {
err := h.collectJVM(mx, raw)
if err != nil {
h.Debugf("error on collecting jvm : %v", err)
}
err = h.collectRPCActivity(mx, raw)
if err != nil {
h.Debugf("error on collecting rpc activity : %v", err)
}
err = h.collectFSDatasetState(mx, raw)
if err != nil {
h.Debugf("error on collecting fs dataset state : %v", err)
}
err = h.collectDataNodeActivity(mx, raw)
if err != nil {
h.Debugf("error on collecting datanode activity state : %v", err)
}
}
func (h *HDFS) collectJVM(mx *metrics, raw rawJMX) error {
v := raw.findJvm()
if v == nil {
return nil
}
var jvm jvmMetrics
err := writeJSONTo(&jvm, v)
if err != nil {
return err
}
mx.Jvm = &jvm
return nil
}
func (h *HDFS) collectRPCActivity(mx *metrics, raw rawJMX) error {
v := raw.findRPCActivity()
if v == nil {
return nil
}
var rpc rpcActivityMetrics
err := writeJSONTo(&rpc, v)
if err != nil {
return err
}
mx.Rpc = &rpc
return nil
}
func (h *HDFS) collectFSNameSystem(mx *metrics, raw rawJMX) error {
v := raw.findFSNameSystem()
if v == nil {
return nil
}
var fs fsNameSystemMetrics
err := writeJSONTo(&fs, v)
if err != nil {
return err
}
fs.CapacityUsed = fs.CapacityDfsUsed + fs.CapacityUsedNonDFS
mx.FSNameSystem = &fs
return nil
}
func (h *HDFS) collectFSDatasetState(mx *metrics, raw rawJMX) error {
v := raw.findFSDatasetState()
if v == nil {
return nil
}
var fs fsDatasetStateMetrics
err := writeJSONTo(&fs, v)
if err != nil {
return err
}
fs.CapacityUsed = fs.Capacity - fs.Remaining
fs.CapacityUsedNonDFS = fs.CapacityUsed - fs.DfsUsed
mx.FSDatasetState = &fs
return nil
}
func (h *HDFS) collectDataNodeActivity(mx *metrics, raw rawJMX) error {
v := raw.findDataNodeActivity()
if v == nil {
return nil
}
var dna dataNodeActivityMetrics
err := writeJSONTo(&dna, v)
if err != nil {
return err
}
mx.DataNodeActivity = &dna
return nil
}
func writeJSONTo(dst interface{}, src interface{}) error {
b, err := json.Marshal(src)
if err != nil {
return err
}
return json.Unmarshal(b, dst)
}
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