func main() {
mh := codec.MsgpackHandle{}
mh.MapType = reflect.TypeOf(map[string]interface{}(nil))
buf := make([]byte, 10240)
b := B{"hello", 3}
msg_b := struct{ B B }{b}
fmt.Printf("Send %#v\n", msg_b)
enc := codec.NewEncoderBytes(&buf, &mh)
err := enc.Encode(msg_b)
if err != nil {
log.Fatalf("Encode: %s", err)
}
var rcv interface{}
dec := codec.NewDecoderBytes(buf, &mh)
err = dec.Decode(&rcv)
if err != nil {
log.Fatalf("Decode: %s", err)
}
fmt.Printf("Raw Recv: %#v\n", rcv)
var msg MSG
dec = codec.NewDecoderBytes(buf, &mh)
err = dec.Decode(&msg)
if err != nil {
log.Fatalf("Decode: %s", err)
}
fmt.Printf("Msg Recv: %#v\n", msg)
fmt.Printf("Msg.A Recv: %#v\n", msg.A)
fmt.Printf("Msg.B Recv: %#v\n", msg.B)
}
// Iterate over a key range, start inclusive, end exclusive. The value is always placed into
// the 'value' interface in order to allow typing. If fun returns an error the iteration is
// aborted.
func (db *DB) Iterate(from, to string, value interface{}, fun func(key string) error) error {
slice := &dbutil.Range{[]byte(from), []byte(to)}
if len(to) == 0 {
slice.Limit = append(slice.Start, 0xFF)
}
glog.V(4).Infof("Iterating from %s to %s", string(slice.Start), string(slice.Limit))
iter := db.ldb.NewIterator(slice, nil)
defer iter.Release()
for iter.Next() {
glog.V(4).Infof(" Iter: %s=>%#v", string(iter.Key()), iter.Value())
d := codec.NewDecoderBytes(iter.Value(), &mh)
err := d.Decode(value)
if err != nil {
return err
}
err = fun(string(iter.Key()))
if err != nil {
return err
}
}
glog.V(4).Infof("Done iterating from %s to %s", string(slice.Start), string(slice.Limit))
return nil
}
// Get performs a key lookup in the store and returns the value. It handles decoding
// the value into the interface provided using msgPack.
func (db *DB) Get(key string, value interface{}) error {
glog.V(3).Infoln("get", key)
data, err := db.ldb.Get([]byte(key), nil)
if err == leveldb.ErrNotFound {
return ErrNotFound
}
if err != nil {
return fmt.Errorf("database.Get key %s: %s", key, err.Error())
}
d := codec.NewDecoderBytes(data, &mh)
err = d.Decode(value)
if err != nil {
return fmt.Errorf("database.Get decoding for key %s: %s", key, err.Error())
}
return nil
}
// Receive receives a message sent across the channel from
// a sender on the other side of the transport.
func (c *channel) Receive(message interface{}) error {
if c.direction == outbound {
return ErrWrongDirection
}
buf, readErr := c.stream.ReadData()
if readErr != nil {
if readErr == io.EOF {
c.stream.Close()
}
return readErr
}
decoder := codec.NewDecoderBytes(buf, c.session.handler)
decodeErr := decoder.Decode(message)
if decodeErr != nil {
return decodeErr
}
return nil
}