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message.go
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message.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 dataproxy
// Callback is the callback function signature of the DataProxy producer
type Callback func(message Message, err error)
// Message is the message to send
type Message struct {
GroupID string // InLong group ID
StreamID string // InLong stream ID
Payload []byte // the content of the message
Headers map[string]string // message headers, won't be sent to the server right now
MetaData interface{} // any data you want, won't be sent to the server, but you can get it in the callback
}