Added bucket throttle configuration struct

pkg/throttle/throttle.go

@@ -0,0 +1,71 @@
+/*
+ * MinIO Go Library for Amazon S3 Compatible Cloud Storage
+ * Copyright 2020 MinIO, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// Package lifecycle contains all the lifecycle related data types and marshallers.
+package throttle
+
+import (
+	"encoding/json"
+	"encoding/xml"
+	//"errors"
+	//"time"
+)
+
+// MarshalJSON customizes json encoding by omitting empty values
+func (r Rule) MarshalJSON() ([]byte, error) {
+	type rule struct {
+		ConcurrentRequestsCount uint64 `json:"ConcurrentRequestsCount,omitempty"`
+		APIs                    string `json:"APIs",omitempty`
+		ID                      string `json:"ID"`
+	}
+	newr := rule{
+		ConcurrentRequestsCount: r.ConcurrentRequestsCount,
+		APIs:                    r.APIs,
+		ID:                      r.ID,
+	}
+
+	return json.Marshal(newr)
+}
+
+// Rule represents a single rule in throttle configuration
+type Rule struct {
+	XMLName                 xml.Name `xml:"Rule,omitempty" json:"-"`
+	ConcurrentRequestsCount uint64  `xml:"ConcurrentRequestsCount" json:"ConcurrentRequestsCount"`
+	APIs                    string   `xml:"APIs" json:"APIs"`
+	ID                      string   `xml:"ID" json:"ID"`
+}
+
+// Configuration is a collection of Rule objects.
+type Configuration struct {
+	XMLName xml.Name `xml:"ThrottleConfiguration,omitempty" json:"-"`
+	Rules   []Rule   `xml:"Rule"`
+}
+
+// Empty check if lifecycle configuration is empty
+func (c *Configuration) Empty() bool {
+	if c == nil {
+		return true
+	}
+	return len(c.Rules) == 0
+}
+
+// NewConfiguration initializes a fresh lifecycle configuration
+// for manipulation, such as setting and removing lifecycle rules
+// and filters.
+func NewConfiguration() *Configuration {
+	return &Configuration{}
+}