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process.go
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process.go
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package update
import (
"context"
"fmt"
"os"
"path/filepath"
"strings"
"github.com/pkg/errors"
osm "github.com/omniscale/go-osm"
"github.com/omniscale/go-osm/parser/diff"
diffstate "github.com/omniscale/go-osm/state"
"github.com/omniscale/imposm3/cache"
"github.com/omniscale/imposm3/config"
"github.com/omniscale/imposm3/database"
_ "github.com/omniscale/imposm3/database/postgis"
"github.com/omniscale/imposm3/expire"
"github.com/omniscale/imposm3/geom/geos"
"github.com/omniscale/imposm3/geom/limit"
"github.com/omniscale/imposm3/log"
"github.com/omniscale/imposm3/mapping"
"github.com/omniscale/imposm3/stats"
"github.com/omniscale/imposm3/writer"
)
const LastStateFilename = "last.state.txt"
func Diff(baseOpts config.Base, files []string) {
if baseOpts.Quiet {
log.SetMinLevel(log.LInfo)
}
var geometryLimiter *limit.Limiter
if baseOpts.LimitTo != "" {
var err error
step := log.Step("Reading limitto geometries")
geometryLimiter, err = limit.NewFromGeoJSON(
baseOpts.LimitTo,
baseOpts.LimitToCacheBuffer,
baseOpts.Srid,
)
if err != nil {
log.Fatal("[fatal] Reading limitto geometry:", err)
}
step()
}
osmCache := cache.NewOSMCache(baseOpts.CacheDir)
err := osmCache.Open()
if err != nil {
log.Fatal("[fatal] Opening OSM cache:", err)
}
defer osmCache.Close()
diffCache := cache.NewDiffCache(baseOpts.CacheDir)
err = diffCache.Open()
if err != nil {
log.Fatal("[fatal] Opening diff cache:", err)
}
var exp expire.Expireor
if baseOpts.ExpireTilesDir != "" {
tileexpire := expire.NewTileList(baseOpts.ExpireTilesZoom, baseOpts.ExpireTilesDir)
exp = tileexpire
defer func() {
if err := tileexpire.Flush(); err != nil {
log.Println("[error] Writing tile expire file:", err)
}
}()
}
for _, oscFile := range files {
err := Update(baseOpts, oscFile, geometryLimiter, exp, osmCache, diffCache, baseOpts.ForceDiffImport)
if err != nil {
osmCache.Close()
diffCache.Close()
log.Fatalf("[fatal] Unable to process %s: %v", oscFile, err)
}
}
// explicitly Close since os.Exit prevents defers
osmCache.Close()
diffCache.Close()
}
func Update(
baseOpts config.Base,
oscFile string,
geometryLimiter *limit.Limiter,
expireor expire.Expireor,
osmCache *cache.OSMCache,
diffCache *cache.DiffCache,
force bool,
) error {
var state *diffstate.DiffState
if strings.HasSuffix(oscFile, ".osc.gz") {
var err error
stateFile := oscFile[:len(oscFile)-len(".osc.gz")] + ".state.txt"
state, err = diffstate.ParseFile(stateFile)
if err != nil && !os.IsNotExist(err) {
return errors.Wrapf(err, "reading state %s", stateFile)
}
}
lastStateFile := filepath.Join(baseOpts.DiffDir, LastStateFilename)
lastState, err := diffstate.ParseFile(lastStateFile)
if err != nil && !os.IsNotExist(err) {
return errors.Wrapf(err, "parsing last state from %s", lastStateFile)
}
if lastState != nil && lastState.Sequence != 0 && state != nil && state.Sequence <= lastState.Sequence {
if !force {
log.Println("[warn] Skipping ", state, ", already imported")
return nil
}
}
defer log.Step(fmt.Sprintf("Processing %s", oscFile))()
diffs := make(chan osm.Diff)
config := diff.Config{
Diffs: diffs,
}
f, err := os.Open(oscFile)
if err != nil {
return errors.Wrap(err, "opening diff file")
}
defer f.Close()
parser, err := diff.NewGZIP(f, config)
if err != nil {
return errors.Wrap(err, "initializing diff parser")
}
tagmapping, err := mapping.FromFile(baseOpts.MappingFile)
if err != nil {
return err
}
dbConf := database.Config{
ConnectionParams: baseOpts.Connection,
Srid: baseOpts.Srid,
// we apply diff imports on the Production schema
ImportSchema: baseOpts.Schemas.Production,
ProductionSchema: baseOpts.Schemas.Production,
BackupSchema: baseOpts.Schemas.Backup,
}
db, err := database.Open(dbConf, &tagmapping.Conf)
if err != nil {
return errors.Wrap(err, "opening database")
}
defer db.Close()
err = db.Begin()
if err != nil {
return err
}
delDb, ok := db.(database.Deleter)
if !ok {
return errors.New("database not deletable")
}
genDb, ok := db.(database.Generalizer)
if ok {
genDb.EnableGeneralizeUpdates()
}
deleter := NewDeleter(
delDb,
osmCache,
diffCache,
tagmapping.Conf.SingleIDSpace,
tagmapping.PointMatcher,
tagmapping.LineStringMatcher,
tagmapping.PolygonMatcher,
tagmapping.RelationMatcher,
tagmapping.RelationMemberMatcher,
)
deleter.SetExpireor(expireor)
progress := stats.NewStatsReporter()
relTagFilter := tagmapping.RelationTagFilter()
wayTagFilter := tagmapping.WayTagFilter()
nodeTagFilter := tagmapping.NodeTagFilter()
relations := make(chan *osm.Relation)
ways := make(chan *osm.Way)
nodes := make(chan *osm.Node)
relWriter := writer.NewRelationWriter(osmCache, diffCache,
tagmapping.Conf.SingleIDSpace,
relations,
db, progress,
tagmapping.PolygonMatcher,
tagmapping.RelationMatcher,
tagmapping.RelationMemberMatcher,
baseOpts.Srid)
relWriter.SetLimiter(geometryLimiter)
relWriter.SetExpireor(expireor)
relWriter.Start()
wayWriter := writer.NewWayWriter(osmCache, diffCache,
tagmapping.Conf.SingleIDSpace,
ways, db,
progress,
tagmapping.PolygonMatcher,
tagmapping.LineStringMatcher,
baseOpts.Srid)
wayWriter.SetLimiter(geometryLimiter)
wayWriter.SetExpireor(expireor)
wayWriter.Start()
nodeWriter := writer.NewNodeWriter(osmCache, nodes, db,
progress,
tagmapping.PointMatcher,
baseOpts.Srid)
nodeWriter.SetLimiter(geometryLimiter)
nodeWriter.SetExpireor(expireor)
nodeWriter.Start()
nodeIDs := make(map[int64]struct{})
wayIDs := make(map[int64]struct{})
relIDs := make(map[int64]struct{})
step := log.Step("Parsing changes, updating cache and removing elements")
g := geos.NewGeos()
ctx, cancel := context.WithCancel(context.Background())
defer cancel() // make sure parser is stopped if we return early with an error
parseError := make(chan error)
go func() {
parseError <- parser.Parse(ctx)
}()
for elem := range diffs {
if elem.Rel != nil {
relTagFilter.Filter(&elem.Rel.Tags)
progress.AddRelations(1)
} else if elem.Way != nil {
wayTagFilter.Filter(&elem.Way.Tags)
progress.AddWays(1)
} else if elem.Node != nil {
nodeTagFilter.Filter(&elem.Node.Tags)
if len(elem.Node.Tags) > 0 {
progress.AddNodes(1)
}
progress.AddCoords(1)
}
// always delete, to prevent duplicate elements from overlap of initial
// import and diff import
if err := deleter.Delete(elem); err != nil && err != cache.NotFound {
return errors.Wrapf(err, "delete element %#v", elem)
}
if elem.Delete {
// no new or modified elem -> remove from cache
if elem.Rel != nil {
if err := osmCache.Relations.DeleteRelation(elem.Rel.ID); err != nil && err != cache.NotFound {
return errors.Wrapf(err, "delete relation %v", elem.Rel)
}
} else if elem.Way != nil {
if err := osmCache.Ways.DeleteWay(elem.Way.ID); err != nil && err != cache.NotFound {
return errors.Wrapf(err, "delete way %v", elem.Way)
}
if err := diffCache.Ways.Delete(elem.Way.ID); err != nil && err != cache.NotFound {
return errors.Wrapf(err, "delete way references %v", elem.Way)
}
} else if elem.Node != nil {
if err := osmCache.Nodes.DeleteNode(elem.Node.ID); err != nil && err != cache.NotFound {
return errors.Wrapf(err, "delete node %v", elem.Node)
}
if err := osmCache.Coords.DeleteCoord(elem.Node.ID); err != nil && err != cache.NotFound {
return errors.Wrapf(err, "delete coord %v", elem.Node)
}
}
}
if elem.Modify && elem.Node != nil && elem.Node.Tags == nil {
// handle modifies where a node drops all tags
if err := osmCache.Nodes.DeleteNode(elem.Node.ID); err != nil && err != cache.NotFound {
return errors.Wrapf(err, "delete node %v", elem.Node)
}
}
if elem.Create || elem.Modify {
if elem.Rel != nil {
// check if first member is cached to avoid caching
// unneeded relations (typical outside of our coverage)
cached, err := osmCache.FirstMemberIsCached(elem.Rel.Members)
if err != nil {
return errors.Wrapf(err, "query first member %v", elem.Rel)
}
if cached {
err := osmCache.Relations.PutRelation(elem.Rel)
if err != nil {
return errors.Wrapf(err, "put relation %v", elem.Rel)
}
relIDs[elem.Rel.ID] = struct{}{}
}
} else if elem.Way != nil {
// check if first coord is cached to avoid caching
// unneeded ways (typical outside of our coverage)
cached, err := osmCache.Coords.FirstRefIsCached(elem.Way.Refs)
if err != nil {
return errors.Wrapf(err, "query first ref %v", elem.Way)
}
if cached {
err := osmCache.Ways.PutWay(elem.Way)
if err != nil {
return errors.Wrapf(err, "put way %v", elem.Way)
}
wayIDs[elem.Way.ID] = struct{}{}
}
} else if elem.Node != nil {
addNode := true
if geometryLimiter != nil {
if !geometryLimiter.IntersectsBuffer(g, elem.Node.Long, elem.Node.Lat) {
addNode = false
}
}
if addNode {
err := osmCache.Nodes.PutNode(elem.Node)
if err != nil {
return errors.Wrapf(err, "put node %v", elem.Node)
}
err = osmCache.Coords.PutCoords([]osm.Node{*elem.Node})
if err != nil {
return errors.Wrapf(err, "put coord %v", elem.Node)
}
nodeIDs[elem.Node.ID] = struct{}{}
}
}
}
}
// mark member ways from deleted relations for re-insert
for id := range deleter.DeletedMemberWays() {
wayIDs[id] = struct{}{}
}
progress.Stop()
step()
err = <-parseError
if err != nil {
return errors.Wrapf(err, "parsing diff %s", oscFile)
}
step = log.Step("Importing added/modified elements")
progress = stats.NewStatsReporter()
// mark depending ways for (re)insert
for nodeID := range nodeIDs {
dependers := diffCache.Coords.Get(nodeID)
for _, way := range dependers {
wayIDs[way] = struct{}{}
}
}
// mark depending relations for (re)insert
for nodeID := range nodeIDs {
dependers := diffCache.CoordsRel.Get(nodeID)
for _, rel := range dependers {
relIDs[rel] = struct{}{}
}
}
for wayID := range wayIDs {
dependers := diffCache.Ways.Get(wayID)
// mark depending relations for (re)insert
for _, rel := range dependers {
relIDs[rel] = struct{}{}
}
}
for relID := range relIDs {
rel, err := osmCache.Relations.GetRelation(relID)
if err != nil {
if err != cache.NotFound {
return errors.Wrapf(err, "fetching cached relation %v", relID)
}
continue
}
// insert new relation
progress.AddRelations(1)
relations <- rel
}
for wayID := range wayIDs {
way, err := osmCache.Ways.GetWay(wayID)
if err != nil {
if err != cache.NotFound {
return errors.Wrapf(err, "fetching cached way %v", wayID)
}
continue
}
// insert new way
progress.AddWays(1)
ways <- way
}
for nodeID := range nodeIDs {
node, err := osmCache.Nodes.GetNode(nodeID)
if err != nil {
if err != cache.NotFound {
return errors.Wrapf(err, "fetching cached node %v", nodeID)
}
// missing nodes can still be Coords
// no `continue` here
}
if node != nil {
// insert new node
progress.AddNodes(1)
nodes <- node
}
}
close(relations)
close(ways)
close(nodes)
nodeWriter.Wait()
relWriter.Wait()
wayWriter.Wait()
if genDb != nil {
genDb.GeneralizeUpdates()
}
err = db.End()
if err != nil {
return err
}
err = db.Close()
if err != nil {
return err
}
step()
progress.Stop()
if state != nil {
if lastState != nil {
state.URL = lastState.URL
}
err = diffstate.WriteFile(filepath.Join(baseOpts.DiffDir, LastStateFilename), state)
if err != nil {
log.Println("[error] Unable to write last state:", err)
}
}
return nil
}