mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
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128 lines
3.2 KiB
Go
128 lines
3.2 KiB
Go
package opentsdbhttp
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import (
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"flag"
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"fmt"
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"io"
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"net/http"
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"runtime"
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"sync"
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"time"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/protoparser/common"
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"github.com/VictoriaMetrics/metrics"
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)
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var maxInsertRequestSize = flag.Int("opentsdbhttp.maxInsertRequestSize", 32*1024*1024, "The maximum size of OpenTSDB HTTP put request")
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// ParseStream parses OpenTSDB http lines from req and calls callback for the parsed rows.
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//
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// The callback can be called multiple times for streamed data from req.
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//
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// callback shouldn't hold rows after returning.
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func ParseStream(req *http.Request, callback func(rows []Row) error) error {
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readCalls.Inc()
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r := req.Body
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if req.Header.Get("Content-Encoding") == "gzip" {
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zr, err := common.GetGzipReader(r)
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if err != nil {
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readErrors.Inc()
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return fmt.Errorf("cannot read gzipped http protocol data: %s", err)
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}
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defer common.PutGzipReader(zr)
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r = zr
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}
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ctx := getStreamContext()
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defer putStreamContext(ctx)
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// Read the request in ctx.reqBuf
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lr := io.LimitReader(r, int64(*maxInsertRequestSize)+1)
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reqLen, err := ctx.reqBuf.ReadFrom(lr)
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if err != nil {
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readErrors.Inc()
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return fmt.Errorf("cannot read HTTP OpenTSDB request: %s", err)
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}
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if reqLen > int64(*maxInsertRequestSize) {
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readErrors.Inc()
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return fmt.Errorf("too big HTTP OpenTSDB request; mustn't exceed `-opentsdbhttp.maxInsertRequestSize=%d` bytes", *maxInsertRequestSize)
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}
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// Unmarshal the request to ctx.Rows
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p := GetParser()
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defer PutParser(p)
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v, err := p.ParseBytes(ctx.reqBuf.B)
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if err != nil {
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unmarshalErrors.Inc()
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return fmt.Errorf("cannot parse HTTP OpenTSDB json: %s", err)
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}
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ctx.Rows.Unmarshal(v)
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rowsRead.Add(len(ctx.Rows.Rows))
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// Fill in missing timestamps
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currentTimestamp := time.Now().Unix()
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rows := ctx.Rows.Rows
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for i := range rows {
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r := &rows[i]
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if r.Timestamp == 0 {
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r.Timestamp = currentTimestamp
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}
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}
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// Convert timestamps in seconds to milliseconds if needed.
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// See http://opentsdb.net/docs/javadoc/net/opentsdb/core/Const.html#SECOND_MASK
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for i := range rows {
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r := &rows[i]
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if r.Timestamp&secondMask == 0 {
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r.Timestamp *= 1e3
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}
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}
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// Insert ctx.Rows to db.
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return callback(ctx.Rows.Rows)
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}
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const secondMask int64 = 0x7FFFFFFF00000000
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type streamContext struct {
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Rows Rows
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reqBuf bytesutil.ByteBuffer
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}
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func (ctx *streamContext) reset() {
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ctx.Rows.Reset()
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ctx.reqBuf.Reset()
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}
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var (
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readCalls = metrics.NewCounter(`vm_protoparser_read_calls_total{type="opentsdbhttp"}`)
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readErrors = metrics.NewCounter(`vm_protoparser_read_errors_total{type="opentsdbhttp"}`)
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rowsRead = metrics.NewCounter(`vm_protoparser_rows_read_total{type="opentsdbhttp"}`)
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unmarshalErrors = metrics.NewCounter(`vm_protoparser_unmarshal_errors_total{type="opentsdbhttp"}`)
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)
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func getStreamContext() *streamContext {
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select {
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case ctx := <-streamContextPoolCh:
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return ctx
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default:
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if v := streamContextPool.Get(); v != nil {
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return v.(*streamContext)
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}
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return &streamContext{}
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}
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}
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func putStreamContext(ctx *streamContext) {
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ctx.reset()
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select {
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case streamContextPoolCh <- ctx:
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default:
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streamContextPool.Put(ctx)
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}
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}
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var streamContextPool sync.Pool
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var streamContextPoolCh = make(chan *streamContext, runtime.GOMAXPROCS(-1))
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