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timestamp.go
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timestamp.go
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// Copyright 2015-2017 trivago GmbH
//
// 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 format
import (
"github.com/trivago/gollum/core"
)
// Timestamp formatter plugin
//
// Timestamp is a formatter that allows prefixing messages with a timestamp
// (time of arrival at gollum). The timestamp format is freely configurable
// and can e.g. contain a delimiter sequence at the end.
//
// Parameters
//
// - Timestamp: This value defines a Go time format string that is used to f
// ormat the timestamp.
// By default this parameter is set to "2006-01-02 15:04:05 MST | ".
//
// Examples
//
// This example will set a time string to the meta data field `time`:
//
// exampleConsumer:
// Type: consumer.Console
// Streams: "*"
// Modulators:
// - format.Timestamp:
// Timestamp: "2006-01-02T15:04:05.000 MST"
// ApplyTo: time
type Timestamp struct {
core.SimpleFormatter `gollumdoc:"embed_type"`
timestampFormat string `config:"Timestamp" default:"2006-01-02 15:04:05 MST | "`
}
func init() {
core.TypeRegistry.Register(Timestamp{})
}
// Configure initializes this formatter with values from a plugin config.
func (format *Timestamp) Configure(conf core.PluginConfigReader) {
}
// ApplyFormatter update message payload
func (format *Timestamp) ApplyFormatter(msg *core.Message) error {
timestampStr := msg.GetCreationTime().Format(format.timestampFormat)
content := format.GetAppliedContent(msg)
dataSize := len(timestampStr) + len(content)
payload := core.MessageDataPool.Get(dataSize)
offset := copy(payload, []byte(timestampStr))
copy(payload[offset:], content)
format.SetAppliedContent(msg, payload)
return nil
}