forked from benthosdev/benthos
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kafka.go
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/
kafka.go
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// Copyright (c) 2014 Ashley Jeffs
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package output
import (
"github.com/Jeffail/benthos/lib/log"
"github.com/Jeffail/benthos/lib/metrics"
"github.com/Jeffail/benthos/lib/output/writer"
"github.com/Jeffail/benthos/lib/types"
)
//------------------------------------------------------------------------------
func init() {
Constructors[TypeKafka] = TypeSpec{
constructor: NewKafka,
description: `
The kafka output type writes messages to a kafka broker, these messages are
acknowledged, which is propagated back to the input. The config field
` + "`ack_replicas`" + ` determines whether we wait for acknowledgement from all
replicas or just a single broker.
It is possible to specify a compression codec to use out of the following
options: none, snappy, lz4 and gzip.
If the field 'key' is not empty then each message will be given its contents as
a key. This field can be dynamically set using function interpolations described
[here](../config_interpolation.md#functions).
By default the paritioner will select partitions based on a hash of the key
value. If the key is empty then a partition is chosen at random. You can
alternatively force the partitioner to round-robin partitions with the field
` + "`round_robin_partitions`" + `.`,
}
}
//------------------------------------------------------------------------------
// NewKafka creates a new Kafka output type.
func NewKafka(conf Config, mgr types.Manager, log log.Modular, stats metrics.Type) (Type, error) {
k, err := writer.NewKafka(conf.Kafka, log, stats)
if err != nil {
return nil, err
}
return NewWriter(
"kafka", k, log, stats,
)
}
//------------------------------------------------------------------------------