commit | 012f65f74744ed62a80abac6e9a8c86e71c2b6fa | [log] [tgz] |
---|---|---|
author | Suryandaru Triandana <syndtr@users.noreply.github.com> | Thu May 07 10:33:29 2015 +0700 |
committer | Suryandaru Triandana <syndtr@users.noreply.github.com> | Thu May 07 10:33:29 2015 +0700 |
tree | c7bf442d0c8d33ba75962ee1b563c87620d74402 | |
parent | 4875955338b0a434238a31165cb87255ab6e9e4a [diff] | |
parent | 6e07c47090fae54b1c64f441af38a265265af397 [diff] |
Merge pull request #106 from restlessbandit/getprop-errors uses a public API error that can be compared for invalid properties
This is an implementation of the LevelDB key/value database in the Go programming language.
go get github.com/syndtr/goleveldb/leveldb
go1.2
or newer.Create or open a database:
db, err := leveldb.OpenFile("path/to/db", nil) ... defer db.Close() ...
Read or modify the database content:
// Remember that the contents of the returned slice should not be modified. data, err := db.Get([]byte("key"), nil) ... err = db.Put([]byte("key"), []byte("value"), nil) ... err = db.Delete([]byte("key"), nil) ...
Iterate over database content:
iter := db.NewIterator(nil, nil) for iter.Next() { // Remember that the contents of the returned slice should not be modified, and // only valid until the next call to Next. key := iter.Key() value := iter.Value() ... } iter.Release() err = iter.Error() ...
Seek-then-Iterate:
iter := db.NewIterator(nil, nil) for ok := iter.Seek(key); ok; ok = iter.Next() { // Use key/value. ... } iter.Release() err = iter.Error() ...
Iterate over subset of database content:
iter := db.NewIterator(&util.Range{Start: []byte("foo"), Limit: []byte("xoo")}, nil) for iter.Next() { // Use key/value. ... } iter.Release() err = iter.Error() ...
Iterate over subset of database content with a particular prefix:
iter := db.NewIterator(util.BytesPrefix([]byte("foo-")), nil) for iter.Next() { // Use key/value. ... } iter.Release() err = iter.Error() ...
Batch writes:
batch := new(leveldb.Batch) batch.Put([]byte("foo"), []byte("value")) batch.Put([]byte("bar"), []byte("another value")) batch.Delete([]byte("baz")) err = db.Write(batch, nil) ...
Use bloom filter:
o := &opt.Options{ Filter: filter.NewBloomFilter(10), } db, err := leveldb.OpenFile("path/to/db", o) ... defer db.Close() ...
You can read package documentation here.