This is an implementation of the LevelDB key/value database in the Go programming language.

Installation

go get github.com/syndtr/goleveldb/leveldb

Usage

Create or open a database:

mydesc, err := desc.OpenFile("path/to/db")
...
mydb, err := db.Open(mydesc, &opt.Options{Flag: opt.OFCreateIfMissing})
...

Read or modify the database content:

ro := &opt.ReadOptions{}
wo := &opt.WriteOptions{}
data, err := mydb.Get([]byte("key"), ro)
...
err = mydb.Put([]byte("key"), []byte("value"), wo)
...
err = mydb.Delete([]byte("key"), wo)
...

Iterate over database content:

myiter := mydb.NewIterator(ro)
for myiter.Next() {
	key := myiter.Key()
	value := myiter.Value()
	...
}
err = myiter.Error()
...

Batch writes:

batch := new(db.Batch)
batch.Put([]byte("foo"), []byte("value"))
batch.Put([]byte("bar"), []byte("another value"))
batch.Delete([]byte("baz"))
err = mydb.Write(batch, wo)
...

Use bloom filter:

o := &opt.Options{
	Flag:   opt.OFCreateIfMissing,
	Filter: filter.NewBloomFilter(10),
}
mydb, err := db.Open(mydesc, o)
...