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96 lines
1.8 KiB
96 lines
1.8 KiB
package config
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import (
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"context"
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"errors"
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"fmt"
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)
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func New(namespace, appName string, providers []Provider) *Client {
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return &Client{
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namespace: namespace,
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appName: appName,
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providers: providers,
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}
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}
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type Client struct {
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providers []Provider
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appName string
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namespace string
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}
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func (c *Client) key(name string) Key {
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return Key{
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Name: name,
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AppName: c.appName,
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Namespace: c.namespace,
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}
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}
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func (c *Client) Value(ctx context.Context, name string) (Value, error) {
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variable, err := c.Variable(ctx, name)
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if err != nil {
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return nil, err
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}
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return variable.Value, nil
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}
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func (c *Client) Variable(ctx context.Context, name string) (Variable, error) {
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var (
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variable Variable
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err error
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)
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key := c.key(name)
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for _, provider := range c.providers {
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variable, err = provider.Read(ctx, key)
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if err == nil || !errors.Is(err, ErrVariableNotFound) {
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break
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}
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}
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if err != nil {
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return variable, fmt.Errorf("client failed get variable: %w", err)
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}
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return variable, nil
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}
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func NewWatch(namespace, appName string, providers []Provider) *WatchClient {
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cl := WatchClient{
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Client: New(namespace, appName, providers),
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}
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for _, provider := range providers {
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if watch, ok := provider.(WatchProvider); ok {
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cl.providers = append(cl.providers, watch)
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}
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}
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return &cl
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}
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type WatchClient struct {
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*Client
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providers []WatchProvider
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}
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func (wc *WatchClient) Watch(ctx context.Context, name string, callback WatchCallback) error {
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key := wc.key(name)
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for _, provider := range wc.providers {
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err := provider.Watch(ctx, key, callback)
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if err != nil {
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if errors.Is(err, ErrVariableNotFound) {
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continue
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}
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return fmt.Errorf("client: failed watch by provider %s: %w", provider.Name(), err)
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}
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}
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return nil
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}
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