83 lines
2.1 KiB
Go
83 lines
2.1 KiB
Go
/*
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Copyright 2021 The Dapr Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package redis
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import (
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"context"
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"errors"
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"fmt"
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"github.com/go-redis/redis/v8"
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"github.com/dapr/components-contrib/bindings"
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rediscomponent "github.com/dapr/components-contrib/internal/component/redis"
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"github.com/dapr/kit/logger"
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)
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// Redis is a redis output binding.
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type Redis struct {
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client redis.UniversalClient
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clientSettings *rediscomponent.Settings
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logger logger.Logger
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ctx context.Context
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cancel context.CancelFunc
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}
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// NewRedis returns a new redis bindings instance.
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func NewRedis(logger logger.Logger) *Redis {
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return &Redis{logger: logger}
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}
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// Init performs metadata parsing and connection creation.
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func (r *Redis) Init(meta bindings.Metadata) (err error) {
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r.client, r.clientSettings, err = rediscomponent.ParseClientFromProperties(meta.Properties, nil)
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if err != nil {
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return err
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}
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r.ctx, r.cancel = context.WithCancel(context.Background())
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_, err = r.client.Ping(r.ctx).Result()
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if err != nil {
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return fmt.Errorf("redis binding: error connecting to redis at %s: %s", r.clientSettings.Host, err)
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}
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return err
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}
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func (r *Redis) Operations() []bindings.OperationKind {
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return []bindings.OperationKind{bindings.CreateOperation}
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}
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func (r *Redis) Invoke(req *bindings.InvokeRequest) (*bindings.InvokeResponse, error) {
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if val, ok := req.Metadata["key"]; ok && val != "" {
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key := val
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_, err := r.client.Do(r.ctx, "SET", key, req.Data).Result()
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if err != nil {
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return nil, err
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}
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return nil, nil
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}
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return nil, errors.New("redis binding: missing key on write request metadata")
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}
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func (r *Redis) Close() error {
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r.cancel()
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return r.client.Close()
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}
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