101 lines
2.7 KiB
Go
101 lines
2.7 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/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 rediscomponent.RedisClient
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clientSettings *rediscomponent.Settings
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logger logger.Logger
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}
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// NewRedis returns a new redis bindings instance.
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func NewRedis(logger logger.Logger) bindings.OutputBinding {
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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(ctx context.Context, 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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_, err = r.client.PingResult(ctx)
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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) Ping(ctx context.Context) error {
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if _, err := r.client.PingResult(ctx); 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 nil
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}
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func (r *Redis) Operations() []bindings.OperationKind {
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return []bindings.OperationKind{
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bindings.CreateOperation,
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bindings.DeleteOperation,
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bindings.GetOperation,
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}
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}
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func (r *Redis) Invoke(ctx context.Context, req *bindings.InvokeRequest) (*bindings.InvokeResponse, error) {
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if key, ok := req.Metadata["key"]; ok && key != "" {
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switch req.Operation {
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case bindings.DeleteOperation:
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err := r.client.Del(ctx, key)
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if err != nil {
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return nil, err
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}
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case bindings.GetOperation:
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data, err := r.client.Get(ctx, key)
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if err != nil {
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return nil, err
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}
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rep := &bindings.InvokeResponse{}
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rep.Data = []byte(data)
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return rep, nil
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case bindings.CreateOperation:
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err := r.client.DoWrite(ctx, "SET", key, req.Data)
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if err != nil {
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return nil, err
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}
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default:
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return nil, fmt.Errorf("invalid operation type: %s", req.Operation)
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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 in request metadata")
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}
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func (r *Redis) Close() error {
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return r.client.Close()
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}
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