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metamocks.go
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metamocks.go
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// Copyright (c) 2021-2024 SigScalr, Inc.
//
// This file is part of SigLens Observability Solution
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package metadata
import (
"bufio"
"bytes"
"fmt"
"os"
"sync"
"github.com/bits-and-blooms/bloom/v3"
"github.com/cespare/xxhash"
"github.com/siglens/siglens/pkg/segment/structs"
segutils "github.com/siglens/siglens/pkg/segment/utils"
"github.com/siglens/siglens/pkg/segment/writer"
"github.com/siglens/siglens/pkg/utils"
log "github.com/sirupsen/logrus"
)
// function to init mock server in memory. Should only be called by tests
func InitMockColumnarMetadataStore(dir string, count int, numBlocks int, entryCount int) {
_ = os.Remove(dir)
globalMetadata = &allSegmentMetadata{
allSegmentMicroIndex: make([]*SegmentMicroIndex, 0),
segmentMetadataReverseIndex: make(map[string]*SegmentMicroIndex),
tableSortedMetadata: make(map[string][]*SegmentMicroIndex),
updateLock: &sync.RWMutex{},
}
writer.SetCardinalityLimit(1)
err := os.MkdirAll(dir, os.FileMode(0755))
if err != nil {
log.Fatalf("InitMockColumnarMetadataStore: Could not create directory %v", err)
}
for i := 0; i < count; i++ {
segkey := dir + "query_test_" + fmt.Sprint(i)
bsumFname := dir + "query_test_" + fmt.Sprint(i) + ".bsu"
colBlooms, blockSummaries, colRis, cnames, allBmh, allColsSizes := writer.WriteMockColSegFile(segkey,
numBlocks, entryCount)
for colName := range cnames {
fname := fmt.Sprintf("%v_%v.cmi", segkey, xxhash.Sum64String(colName))
allBlooms := make([]*bloom.BloomFilter, len(colBlooms))
var foundBlooms bool
for blockNum, allBooms := range colBlooms {
bloomIdx, ok := allBooms[colName]
if !ok {
continue
}
foundBlooms = true
allBlooms[blockNum] = bloomIdx.Bf
}
if foundBlooms {
writeMockBlockBloom(fname, allBlooms)
continue
}
allRange := make([]map[string]*structs.Numbers, len(colBlooms))
var foundRange bool
for blockNum, allRanges := range colRis {
rangeIndex, ok := allRanges[colName]
if !ok {
continue
}
foundRange = true
allRange[blockNum] = rangeIndex.Ranges
}
if foundRange {
writeMockBlockRI(fname, allRange)
continue
}
}
writeMockBlockSummary(allBmh, bsumFname, blockSummaries)
sInfo := &structs.SegMeta{
SegmentKey: segkey,
VirtualTableName: "evts",
SegbaseDir: segkey, // its actually one dir up, but for mocks its fine
EarliestEpochMS: 0,
LatestEpochMS: uint64(entryCount),
ColumnNames: allColsSizes,
NumBlocks: uint16(numBlocks),
}
segMetadata := InitSegmentMicroIndex(sInfo)
BulkAddSegmentMicroIndex([]*SegmentMicroIndex{segMetadata})
}
}
func writeMockBlockBloom(file string, blockBlooms []*bloom.BloomFilter) {
bffd, err := os.OpenFile(file, os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0644)
if err != nil {
log.Errorf("writeMockBlockBloom: open failed fname=%v, err=%v", file, err)
return
}
defer bffd.Close()
for blkNum, blockBloom := range blockBlooms {
var buf bytes.Buffer
bufWriter := bufio.NewWriter(&buf)
bytesWritten, bferr := blockBloom.WriteTo(bufWriter)
if bferr != nil {
log.Errorf("writeMockBlockBloom: write buf failed fname=%v, err=%v", file, bferr)
return
}
bytesWritten += segutils.LEN_BLKNUM_CMI_SIZE // for blkNum
bytesWritten += 1 // reserve for CMI type
if _, err = bffd.Write(utils.Uint32ToBytesLittleEndian(uint32(bytesWritten))); err != nil {
log.Errorf("writeMockBlockBloom: bloomsize write failed fname=%v, err=%v", file, err)
return
}
// copy the blockNum
if _, err = bffd.Write(utils.Uint16ToBytesLittleEndian(uint16(blkNum))); err != nil {
log.Errorf("writeMockBlockBloom: bloomsize write failed fname=%v, err=%v", file, err)
return
}
// write CMI type
if _, err = bffd.Write(segutils.CMI_BLOOM_INDEX); err != nil {
log.Errorf("writeMockBlockBloom: CMI Type write failed fname=%v, err=%v", file, err)
return
}
_, bferr = blockBloom.WriteTo(bffd)
if bferr != nil {
log.Errorf("flushBlockBloom: write blockbloom failed fname=%v, err=%v", file, bferr)
return
}
}
}
func writeMockBlockRI(file string, blockRange []map[string]*structs.Numbers) {
bffd, err := os.OpenFile(file, os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0644)
if err != nil {
log.Errorf("writeMockBlockBloom: open failed fname=%v, err=%v", file, err)
return
}
defer bffd.Close()
for blkNum, blockRI := range blockRange {
packedLen, blkRIBuf, err := writer.EncodeRIBlock(blockRI, uint16(blkNum))
if err != nil {
log.Errorf("writeMockBlockRI: EncodeRIBlock: Failed to encode BlockRangeIndex=%+v, err=%v", blockRI, err)
return
}
if _, err := bffd.Write(blkRIBuf[0:packedLen]); err != nil {
log.Errorf("writeMockBlockRI: write failed blockRangeIndexFname=%v, err=%v", file, err)
return
}
}
}
func writeMockBlockSummary(allbmh map[uint16]*structs.BlockMetadataHolder, file string,
blockSums []*structs.BlockSummary) {
fd, err := os.OpenFile(file, os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0644)
if err != nil {
log.Errorf("flushBlockSummary: open failed blockSummaryFname=%v, err=%v", file, err)
return
}
defer fd.Close()
for blkNum, block := range blockSums {
blkSumBuf := make([]byte, segutils.BLOCK_SUMMARY_SIZE)
packedLen, blkSumBuf, err := writer.EncodeBlocksum(allbmh[uint16(blkNum)], block,
blkSumBuf[0:], uint16(blkNum))
if err != nil {
log.Errorf("writeMockBlockSummary: EncodeBlocksum: Failed to encode blocksummary=%+v, err=%v", block, err)
return
}
if _, err := fd.Write(blkSumBuf[:packedLen]); err != nil {
log.Errorf("WriteBlockSummary: write failed blockSummaryFname=%v, err=%v", file, err)
return
}
}
err = fd.Sync()
if err != nil {
log.Fatal(err)
}
}