b2021c126e
* Made Encode/Decode message public. * Added Redis storage driver and made some optimizations for the initialising the blockchain * removed log lines in tcp_peer * Added missing comments on exported methods. * bumped version
89 lines
1.9 KiB
Go
89 lines
1.9 KiB
Go
package storage
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import (
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"fmt"
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"github.com/go-redis/redis"
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)
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// RedisStore holds the client and maybe later some more metadata.
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type RedisStore struct {
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client *redis.Client
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}
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// RedisBatch simple batch implementation to satisfy the Store interface.
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type RedisBatch struct {
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mem map[string]string
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}
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// Len implements the Batch interface.
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func (b *RedisBatch) Len() int {
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return len(b.mem)
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}
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// Put implements the Batch interface.
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func (b *RedisBatch) Put(k, v []byte) {
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b.mem[string(k)] = string(v)
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}
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// NewRedisBatch returns a new ready to use RedisBatch.
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func NewRedisBatch() *RedisBatch {
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return &RedisBatch{
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mem: make(map[string]string),
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}
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}
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// NewRedisStore returns an new initialized - ready to use RedisStore object
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func NewRedisStore() (*RedisStore, error) {
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c := redis.NewClient(&redis.Options{
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Addr: "localhost:6379",
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Password: "",
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DB: 0,
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})
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if _, err := c.Ping().Result(); err != nil {
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return nil, err
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}
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return &RedisStore{
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client: c,
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}, nil
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}
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// Batch implements the Store interface.
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func (s *RedisStore) Batch() Batch {
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return NewRedisBatch()
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}
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// Get implements the Store interface.
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func (s *RedisStore) Get(k []byte) ([]byte, error) {
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val, err := s.client.Get(string(k)).Result()
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if err != nil {
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return nil, err
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}
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return []byte(val), nil
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}
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// Put implements the Store interface.
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func (s *RedisStore) Put(k, v []byte) error {
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s.client.Set(string(k), string(v), 0)
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return nil
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}
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// PutBatch implements the Store interface.
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func (s *RedisStore) PutBatch(b Batch) error {
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pipe := s.client.Pipeline()
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for k, v := range b.(*RedisBatch).mem {
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pipe.Set(k, v, 0)
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}
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_, err := pipe.Exec()
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return err
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}
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// Seek implements the Store interface.
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func (s *RedisStore) Seek(k []byte, f func(k, v []byte)) {
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iter := s.client.Scan(0, fmt.Sprintf("%s*", k), 0).Iterator()
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for iter.Next() {
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key := iter.Val()
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val, _ := s.client.Get(key).Result()
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f([]byte(key), []byte(val))
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}
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}
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