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topic_name.go
137 lines (122 loc) · 3.9 KB
/
topic_name.go
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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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 internal
import (
"errors"
"fmt"
"net/url"
"strconv"
"strings"
)
// TopicName abstract a struct contained in a Topic
type TopicName struct {
Domain string
Tenant string
Namespace string
Topic string
Name string
Partition int
}
const (
publicTenant = "public"
defaultNamespace = "default"
partitionedTopicSuffix = "-partition-"
)
// ParseTopicName parse the given topic name and return TopicName.
func ParseTopicName(topic string) (*TopicName, error) {
// The topic name can be in two different forms, one is fully qualified topic name,
// the other one is short topic name
if !strings.Contains(topic, "://") {
// The short topic name can be:
// - <topic>
// - <tenant>/<namespace>/<topic>
// - <tenant>/<cluster>/<namespace>/<topic>
parts := strings.Split(topic, "/")
if len(parts) == 3 || len(parts) == 4 {
topic = "persistent://" + topic
} else if len(parts) == 1 {
topic = "persistent://" + publicTenant + "/" + defaultNamespace + "/" + parts[0]
} else {
return nil, errors.New(
"Invalid short topic name '" + topic +
"', it should be in the format of <tenant>/<namespace>/<topic> or <topic>")
}
}
tn := &TopicName{}
// The fully qualified topic name can be in two different forms:
// new: persistent://tenant/namespace/topic
// legacy: persistent://tenant/cluster/namespace/topic
parts := strings.SplitN(topic, "://", 2)
domain := parts[0]
if domain != "persistent" && domain != "non-persistent" {
return nil, errors.New("Invalid topic domain: " + domain)
}
tn.Domain = domain
rest := parts[1]
var err error
// The rest of the name can be in different forms:
// new: tenant/namespace/<localName>
// legacy: tenant/cluster/namespace/<localName>
// Examples of localName:
// 1. some/name/xyz//
// 2. /xyz-123/feeder-2
parts = strings.SplitN(rest, "/", 4)
tn.Tenant = parts[0]
if len(parts) == 3 {
// New topic name without cluster name
tn.Namespace = parts[0] + "/" + parts[1]
tn.Topic = parts[2]
} else if len(parts) == 4 {
// Legacy topic name that includes cluster name
tn.Namespace = fmt.Sprintf("%s/%s/%s", parts[0], parts[1], parts[2])
tn.Topic = parts[3]
} else {
return nil, errors.New("Invalid topic name: " + topic)
}
tn.Name = topic
tn.Partition, err = getPartitionIndex(topic)
if err != nil {
return nil, err
}
return tn, nil
}
func TopicNameWithoutPartitionPart(tn *TopicName) string {
if tn.Partition < 0 {
return tn.Name
}
idx := strings.LastIndex(tn.Name, partitionedTopicSuffix)
if idx > 0 {
return tn.Name[:idx]
}
return tn.Name
}
func getPartitionIndex(topic string) (int, error) {
if strings.Contains(topic, partitionedTopicSuffix) {
idx := strings.LastIndex(topic, "-") + 1
return strconv.Atoi(topic[idx:])
}
return -1, nil
}
func IsV2TopicName(tn *TopicName) bool {
parts := strings.Split(tn.Namespace, "/")
// Legacy topic name that includes cluster name
// tn.Namespace = fmt.Sprintf("%s/%s/%s", parts[0], parts[1], parts[2])
return len(parts) != 3
}
func GetTopicRestPath(tn *TopicName) string {
return fmt.Sprintf("%s/%s/%s", tn.Domain, tn.Namespace, url.QueryEscape(tn.Topic))
}