kafka/client.go

/*
 * Copyright 2018-present Open Networking Foundation

 * 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 kafka

import (
	ca "github.com/opencord/voltha-go/protos/core_adapter"
)

const (
	DefaultKafkaHost         = "127.0.0.1"
	DefaultKafkaPort         = 9092
	DefaultGroupName         = "rw_core"
	DefaultSleepOnError      = 1
	DefaultFlushFrequency    = 1
	DefaultFlushMessages     = 1
	DefaultFlushMaxmessages  = 1
	DefaultReturnSuccess     = false
	DefaultReturnErrors      = true
	DefaultConsumerMaxwait   = 10
	DefaultMaxProcessingTime = 100
)

// MsgClient represents the set of APIs  a Kafka MsgClient must implement
type Client interface {
	Start(retries int) error
	Stop()
	CreateTopic(topic *Topic, numPartition int, repFactor int, retries int) error
	DeleteTopic(topic *Topic) error
	Subscribe(topic *Topic, retries int) (<-chan *ca.InterContainerMessage, error)
	UnSubscribe(topic *Topic, ch <-chan *ca.InterContainerMessage) error
	Send(msg interface{}, topic *Topic, keys ...string)
}