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68 lines
2.6 KiB
Go
68 lines
2.6 KiB
Go
// Licensed to the LF AI & Data foundation under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "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
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package common
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// ProducerOptions contains the options of a producer
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type ProducerOptions struct {
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// The topic that this Producer will publish
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Topic string
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// Enable compression
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// For Pulsar, this enables ZSTD compression with default compression level
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EnableCompression bool
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}
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// ProducerMessage contains the messages of a producer
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type ProducerMessage struct {
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// Payload get the payload of the message
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Payload []byte
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// Properties are application defined key/value pairs that will be attached to the message.
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// Return the properties attached to the message.
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Properties map[string]string
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}
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// Message is the interface that provides operations of a consumer
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type Message interface {
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// Topic get the topic from which this message originated from
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Topic() string
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// Properties are application defined key/value pairs that will be attached to the message.
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// Return the properties attached to the message.
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Properties() map[string]string
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// Payload get the payload of the message
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Payload() []byte
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// ID get the unique message ID associated with this message.
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// The message id can be used to univocally refer to a message without having the keep the entire payload in memory.
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ID() MessageID
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}
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// SubscriptionInitialPosition is the type of a subscription initial position
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type SubscriptionInitialPosition int
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const (
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// SubscriptionPositionLatest is latest position which means the start consuming position will be the last message
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SubscriptionPositionLatest SubscriptionInitialPosition = iota
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// SubscriptionPositionEarliest is earliest position which means the start consuming position will be the first message
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SubscriptionPositionEarliest
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// SubscriptionPositionUnkown indicates we don't care about the consumer location, since we are doing another seek or only some meta api over that
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SubscriptionPositionUnknown
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)
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