devlopment branch (#1736)

pkg/simple/client/cache/options.go

@@ -0,0 +1,46 @@
+package cache
+
+import (
+	"github.com/go-redis/redis"
+	"github.com/spf13/pflag"
+	"kubesphere.io/kubesphere/pkg/utils/reflectutils"
+)
+
+type Options struct {
+	RedisURL string
+}
+
+// NewRedisOptions returns options points to nowhere,
+// because redis is not required for some components
+func NewRedisOptions() *Options {
+	return &Options{
+		RedisURL: "",
+	}
+}
+
+// Validate check options
+func (r *Options) Validate() []error {
+	errors := make([]error, 0)
+
+	_, err := redis.ParseURL(r.RedisURL)
+
+	if err != nil {
+		errors = append(errors, err)
+	}
+
+	return errors
+}
+
+// ApplyTo apply to another options if it's a enabled option(non empty host)
+func (r *Options) ApplyTo(options *Options) {
+	if r.RedisURL != "" {
+		reflectutils.Override(options, r)
+	}
+}
+
+// AddFlags add option flags to command line flags,
+// if redis-host left empty, the following options will be ignored.
+func (r *Options) AddFlags(fs *pflag.FlagSet, s *Options) {
+	fs.StringVar(&r.RedisURL, "redis-url", s.RedisURL, "Redis connection URL. If left blank, means redis is unnecessary, "+
+		"redis will be disabled. e.g. redis://:password@host:port/db")
+}