From 5cd3f6c765025516a1a68e33dcae0b1733696ab3 Mon Sep 17 00:00:00 2001 From: mappu Date: Sat, 15 Jun 2024 12:37:44 +1200 Subject: [PATCH] badger: initial support --- badger.go | 143 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ go.mod | 15 ++++++ go.sum | 105 +++++++++++++++++++++++++++++++++++++++ main.go | 15 ++++++ 4 files changed, 278 insertions(+) create mode 100644 badger.go diff --git a/badger.go b/badger.go new file mode 100644 index 0000000..00c3b6f --- /dev/null +++ b/badger.go @@ -0,0 +1,143 @@ +package main + +import ( + "fmt" + "path/filepath" + "unsafe" + + "github.com/dgraph-io/badger/v4" + "github.com/ying32/govcl/vcl" + "github.com/ying32/govcl/vcl/types" +) + +type badgerLoadedDatabase struct { + displayName string + path string + db *badger.DB + nav *vcl.TTreeNode + + arena []*navData // keepalive +} + +func (ld *badgerLoadedDatabase) DisplayName() string { + return ld.displayName +} + +func (ld *badgerLoadedDatabase) DriverName() string { + return "Badger v4" +} + +func (ld *badgerLoadedDatabase) RootElement() *vcl.TTreeNode { + return ld.nav +} + +func (ld *badgerLoadedDatabase) Keepalive(ndata *navData) { + ld.arena = append(ld.arena, ndata) +} + +func (ld *badgerLoadedDatabase) RenderForNav(f *TMainForm, ndata *navData) { + + // Load properties + + content := fmt.Sprintf("Table statistics: %#v", ld.db.Tables()) + f.propertiesBox.SetText(content) + + // Load data + + f.contentBox.SetEnabled(false) + f.contentBox.Clear() + + // Badger always uses Key + Value as the columns + + f.contentBox.Columns().Clear() + colKey := f.contentBox.Columns().Add() + colKey.SetCaption("Key") + colKey.SetWidth(MY_WIDTH) + colKey.SetAlignment(types.TaLeftJustify) + colVal := f.contentBox.Columns().Add() + colVal.SetCaption("Value") + + err := ld.db.View(func(txn *badger.Txn) error { + + // Valid + f.contentBox.Clear() + + // Create iterator + opts := badger.DefaultIteratorOptions + opts.PrefetchSize = 64 + it := txn.NewIterator(opts) + defer it.Close() + + for it.Rewind(); it.Valid(); it.Next() { + item := it.Item() + k := item.Key() + err := item.Value(func(v []byte) error { + dataEntry := f.contentBox.Items().Add() + dataEntry.SetCaption(formatUtf8(k)) + dataEntry.SubItems().Add(formatUtf8(v)) + + return nil + }) + if err != nil { + return err + } + } + return nil + }) + if err != nil { + vcl.ShowMessage(fmt.Sprintf("Failed to load data: %s", err.Error())) + return + } + + // Valid + f.contentBox.SetEnabled(true) +} + +func (ld *badgerLoadedDatabase) NavChildren(ndata *navData) ([]string, error) { + // In the Badger implementation, there is only one child: "Data" + if len(ndata.bucketPath) == 0 { + return []string{"Data"}, nil + + } else { + // No children deeper than that + return []string{}, nil + } +} + +func (ld *badgerLoadedDatabase) ExecQuery(query string, resultArea *vcl.TListView) { + vcl.ShowMessage("Badger doesn't support querying") +} + +var _ loadedDatabase = &badgerLoadedDatabase{} // interface assertion + +// + +func (f *TMainForm) badgerAddDatabaseFromDirectory(path string) { + // TODO load in background thread to stop blocking the UI + db, err := badger.Open(badger.DefaultOptions(path)) + if err != nil { + vcl.ShowMessage(fmt.Sprintf("Failed to load database '%s': %s", path, err.Error())) + return + } + + ld := &badgerLoadedDatabase{ + path: path, + displayName: filepath.Base(path), + db: db, + } + + ld.nav = f.Buckets.Items().Add(nil, ld.displayName) + ld.nav.SetHasChildren(true) // dynamically populate in OnNavExpanding + ld.nav.SetImageIndex(imgDatabase) + ld.nav.SetSelectedIndex(imgDatabase) + navData := &navData{ + ld: ld, + childrenLoaded: false, // will be loaded dynamically + bucketPath: []string{}, // empty = root + } + ld.nav.SetData(unsafe.Pointer(navData)) + + f.dbs = append(f.dbs, ld) + + ld.Keepalive(navData) +} diff --git a/go.mod b/go.mod index 3d2c64e..673c5d0 100644 --- a/go.mod +++ b/go.mod @@ -3,8 +3,23 @@ module yvbolt go 1.19 require ( + github.com/cespare/xxhash/v2 v2.2.0 // indirect + github.com/dgraph-io/badger/v4 v4.2.0 // indirect + github.com/dgraph-io/ristretto v0.1.1 // indirect + github.com/dustin/go-humanize v1.0.0 // indirect + github.com/gogo/protobuf v1.3.2 // indirect + github.com/golang/glog v1.0.0 // indirect + github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6 // indirect + github.com/golang/protobuf v1.5.2 // indirect + github.com/golang/snappy v0.0.3 // indirect + github.com/google/flatbuffers v1.12.1 // indirect + github.com/klauspost/compress v1.12.3 // indirect github.com/mattn/go-sqlite3 v1.14.22 // indirect + github.com/pkg/errors v0.9.1 // indirect github.com/ying32/govcl v2.2.3+incompatible // indirect go.etcd.io/bbolt v1.4.0-alpha.1 // indirect + go.opencensus.io v0.22.5 // indirect + golang.org/x/net v0.7.0 // indirect golang.org/x/sys v0.19.0 // indirect + google.golang.org/protobuf v1.28.1 // indirect ) diff --git a/go.sum b/go.sum index 45354c7..a1fd566 100644 --- a/go.sum +++ b/go.sum @@ -1,12 +1,117 @@ 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+google.golang.org/protobuf v1.28.1/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I= +gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= +gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= +honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= diff --git a/main.go b/main.go index 713dda1..be8019c 100644 --- a/main.go +++ b/main.go @@ -62,6 +62,12 @@ func (f *TMainForm) OnFormCreate(sender vcl.IObject) { mnuFileSqliteOpen.SetOnClick(f.OnMnuFileSqliteOpenClick) mnuFile.Add(mnuFileSqliteOpen) + mnuFileBadgerOpen := vcl.NewMenuItem(mnuFile) + mnuFileBadgerOpen.SetCaption("Open Badger v4 database...") + mnuFileBadgerOpen.SetImageIndex(imgDatabaseAdd) + mnuFileBadgerOpen.SetOnClick(f.OnMnuFileBadgerOpenClick) + mnuFile.Add(mnuFileBadgerOpen) + mnuFileSqliteMemory := vcl.NewMenuItem(mnuFile) mnuFileSqliteMemory.SetCaption("New SQLite in-memory database") mnuFileSqliteMemory.SetImageIndex(imgDatabaseAdd) @@ -204,6 +210,15 @@ func (f *TMainForm) OnMnuFileSqliteOpenClick(sender vcl.IObject) { } } +func (f *TMainForm) OnMnuFileBadgerOpenClick(sender vcl.IObject) { + dlg := vcl.NewSelectDirectoryDialog(f) + dlg.SetTitle("Select a database directory...") + ret := dlg.Execute() // Fake blocking + if ret { + f.badgerAddDatabaseFromDirectory(dlg.FileName()) + } +} + func (f *TMainForm) OnMnuFileSqliteMemoryClick(sender vcl.IObject) { f.sqliteAddDatabaseFromFile(`:memory:`) }