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redis-antipode.go
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redis-antipode.go
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package antipode
import (
"context"
"encoding/json"
"errors"
"github.com/redis/go-redis/v9"
)
type Redis struct {
client *redis.Client
}
func CreateRedis(redis_host string, redis_port string, redis_password string) Redis {
return Redis{redis.NewClient(&redis.Options{
Addr: redis_host + ":" + redis_port,
Password: redis_password, // no password set
DB: 0, // use default DB
})}
}
func (r Redis) write(ctx context.Context, key string, obj AntiObj) error {
jsonAntiObj, err := json.Marshal(obj)
if err != nil {
return err
}
err = r.client.Set(ctx, key, jsonAntiObj, 0).Err()
return err
}
func (r Redis) read(ctx context.Context, key string) (AntiObj, error) {
jsonAntiObj, err := r.client.Get(ctx, key).Bytes()
if err != nil {
return AntiObj{}, err
}
var obj AntiObj
err = json.Unmarshal(jsonAntiObj, &obj)
if err != nil {
return AntiObj{}, err
}
return obj, err
}
func (r Redis) barrier(ctx context.Context, lineage []WriteIdentifier, datastoreID string) error {
for _, writeIdentifier := range lineage {
if writeIdentifier.Dtstid == datastoreID {
for {
jsonAntiObj, err := r.client.Get(ctx, writeIdentifier.Key).Bytes()
if !errors.Is(err, redis.Nil) && err != nil {
return err
} else if errors.Is(err, redis.Nil) { //the version replication process is not yet completed
continue
} else {
var obj AntiObj
err = json.Unmarshal(jsonAntiObj, &obj)
if err != nil {
return err
} else if obj.Version == writeIdentifier.Version { //the version replication process is already completed
break
} else { //the version replication process is not yet completed
continue
}
}
}
}
}
return nil
}