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70 lines
1.9 KiB
Go
70 lines
1.9 KiB
Go
// Copyright (C) 2019-2020 Zilliz. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software distributed under the License
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// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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// or implied. See the License for the specific language governing permissions and limitations under the License.
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package client
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import (
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"github.com/milvus-io/milvus/pkg/mq/common"
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"github.com/milvus-io/milvus/pkg/mq/mqimpl/rocksmq/server"
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)
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// UniqueID is the type of message ID
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type UniqueID = server.UniqueID
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// EarliestMessageID is used to get the earliest message ID, default -1
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func EarliestMessageID() UniqueID {
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return -1
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}
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// ConsumerOptions is the options of a consumer
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type ConsumerOptions struct {
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// The topic that this consumer will subscribe on
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Topic string
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// The subscription name for this consumer
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SubscriptionName string
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// InitialPosition at which the cursor will be set when subscribe
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// Default is `Latest`
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common.SubscriptionInitialPosition
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// Message for this consumer
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// When a message is received, it will be pushed to this channel for consumption
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MessageChannel chan common.Message
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}
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// Consumer interface provide operations for a consumer
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type Consumer interface {
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// returns the subscription for the consumer
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Subscription() string
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// returns the topic for the consumer
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Topic() string
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// Signal channel
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MsgMutex() chan struct{}
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// Message channel
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Chan() <-chan common.Message
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// Seek to the uniqueID position
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Seek(UniqueID) error //nolint:govet
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// Close consumer
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Close()
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// GetLatestMsgID get the latest msgID
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GetLatestMsgID() (int64, error)
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// check created topic whether vaild or not
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CheckTopicValid(topic string) error
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}
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