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|
package logformat
import (
"fmt"
"strings"
"github.com/mimecast/dtail/internal/mapr"
"github.com/mimecast/dtail/internal/protocol"
)
type defaultParser struct {
hostname string
timeZoneName string
timeZoneOffset string
fieldsCapacity int
wantStar bool
wantLine bool
wantEmpty bool
wantHostname bool
wantServer bool
wantTimezone bool
wantTimeOffset bool
wantSeverity bool
wantLogLevel bool
wantTime bool
wantDate bool
wantHour bool
wantMinute bool
wantSecond bool
wantPID bool
wantCaller bool
wantCPUs bool
wantGoroutines bool
wantCGOCalls bool
wantLoadAvg bool
wantUptime bool
allDynamicFields bool
dynamicFields map[string]struct{}
}
func newDefaultParser(hostname, timeZoneName string, timeZoneOffset int) (*defaultParser, error) {
parser := &defaultParser{
hostname: hostname,
timeZoneName: timeZoneName,
timeZoneOffset: fmt.Sprintf("%d", timeZoneOffset),
}
parser.configureFieldPlan(mapr.ParserFieldPlan{AllFields: true})
return parser, nil
}
func (p *defaultParser) setQuery(query *mapr.Query) {
p.configureFieldPlan(query.ParserFieldPlan())
}
func (p *defaultParser) MakeFields(maprLine string) (map[string]string, error) {
fields := make(map[string]string, p.fieldsCapacity)
tokenIndex := 0
start := 0
delimiter := protocol.FieldDelimiter[0]
for {
token, next, done := scanDelimitedField(maprLine, start, delimiter)
switch {
case tokenIndex == 0:
if !strings.HasPrefix(token, "INFO") {
return nil, ErrIgnoreFields
}
p.addDefaultFields(fields, maprLine)
if p.wantSeverity {
fields["$severity"] = token
}
if p.wantLogLevel {
fields["$loglevel"] = token
}
case tokenIndex == 1:
if p.wantTime {
fields["$time"] = token
}
if len(token) == 15 {
// Example: 20211002-071209
if p.wantDate {
fields["$date"] = token[0:8]
}
if p.wantHour {
fields["$hour"] = token[9:11]
}
if p.wantMinute {
fields["$minute"] = token[11:13]
}
if p.wantSecond {
fields["$second"] = token[13:]
}
}
case tokenIndex == 2:
if p.wantPID {
fields["$pid"] = token
}
case tokenIndex == 3:
if p.wantCaller {
fields["$caller"] = token
}
case tokenIndex == 4:
if p.wantCPUs {
fields["$cpus"] = token
}
case tokenIndex == 5:
if p.wantGoroutines {
fields["$goroutines"] = token
}
case tokenIndex == 6:
if p.wantCGOCalls {
fields["$cgocalls"] = token
}
case tokenIndex == 7:
if p.wantLoadAvg {
fields["$loadavg"] = token
}
case tokenIndex == 8:
if p.wantUptime {
fields["$uptime"] = token
}
case tokenIndex == 9:
if !strings.HasPrefix(token, "MAPREDUCE:") {
return nil, ErrIgnoreFields
}
default:
if err := p.addKeyValueField(fields, token); err != nil {
return fields, err
}
}
tokenIndex++
if done {
break
}
start = next
}
if tokenIndex < 11 {
// Not a DTail mapreduce log line.
return nil, ErrIgnoreFields
}
return fields, nil
}
func (p *defaultParser) addDefaultFields(fields map[string]string, maprLine string) {
if p.wantStar {
fields["*"] = "*"
}
if p.wantLine {
fields["$line"] = maprLine
}
if p.wantEmpty {
fields["$empty"] = ""
}
if p.wantHostname {
fields["$hostname"] = p.hostname
}
if p.wantServer {
fields["$server"] = p.hostname
}
if p.wantTimezone {
fields["$timezone"] = p.timeZoneName
}
if p.wantTimeOffset {
fields["$timeoffset"] = p.timeZoneOffset
}
}
func (p *defaultParser) addDynamicField(fields map[string]string, key string, value string) {
if p.allDynamicFields {
fields[key] = value
return
}
if _, ok := p.dynamicFields[key]; ok {
fields[key] = value
}
}
func (p *defaultParser) addKeyValueField(fields map[string]string, token string) error {
keyAndValueIndex := strings.IndexByte(token, '=')
if keyAndValueIndex < 0 {
return fmt.Errorf("Unable to parse key-value token '%s'", token)
}
p.addDynamicField(fields, token[:keyAndValueIndex], token[keyAndValueIndex+1:])
return nil
}
func (p *defaultParser) configureFieldPlan(plan mapr.ParserFieldPlan) {
p.fieldsCapacity = plan.Capacity()
p.dynamicFields = nil
p.allDynamicFields = plan.AllFields
p.wantStar = plan.Needs("*")
p.wantLine = plan.Needs("$line")
p.wantEmpty = plan.Needs("$empty")
p.wantHostname = plan.Needs("$hostname")
p.wantServer = plan.Needs("$server")
p.wantTimezone = plan.Needs("$timezone")
p.wantTimeOffset = plan.Needs("$timeoffset")
p.wantSeverity = plan.Needs("$severity")
p.wantLogLevel = plan.Needs("$loglevel")
p.wantTime = plan.Needs("$time")
p.wantDate = plan.Needs("$date")
p.wantHour = plan.Needs("$hour")
p.wantMinute = plan.Needs("$minute")
p.wantSecond = plan.Needs("$second")
p.wantPID = plan.Needs("$pid")
p.wantCaller = plan.Needs("$caller")
p.wantCPUs = plan.Needs("$cpus")
p.wantGoroutines = plan.Needs("$goroutines")
p.wantCGOCalls = plan.Needs("$cgocalls")
p.wantLoadAvg = plan.Needs("$loadavg")
p.wantUptime = plan.Needs("$uptime")
if plan.AllFields {
return
}
p.dynamicFields = make(map[string]struct{}, len(plan.Fields))
for field := range plan.Fields {
p.dynamicFields[field] = struct{}{}
}
}
|
