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config.go
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config.go
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// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. 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 pipeline
import (
"encoding/json"
"errors"
)
type Config struct {
ID string `yaml:"id,omitempty" json:"id,omitempty"`
Description string `yaml:"description,omitempty" json:"description,omitempty"`
Processors []ProcessorConfig `yaml:"processors,omitempty" json:"processors,omitempty"`
OnFailure []ProcessorConfig `yaml:"on_failure,omitempty" json:"on_failure,omitempty"`
}
type ProcessorConfig map[string]*ProcessorOptionConfig
type ProcessorOptionConfig struct {
ID string `yaml:"id,omitempty" json:"id,omitempty"`
If ConditionalExpressionConfig `yaml:"if,omitempty" json:"if,omitempty"`
OnFailure []ProcessorConfig `yaml:"on_failure,omitempty" json:"on_failure,omitempty"`
Config map[string]interface{} `yaml:",inline" json:"-" config:",inline"`
}
type ConditionalExpressionConfig string
func (c ProcessorConfig) getProcessor() (name string, opts *ProcessorOptionConfig, err error) {
if len(c) == 0 {
return "", nil, errors.New("processor cannot be empty")
}
if len(c) > 1 {
return "", nil, errors.New("only one processor must be specified")
}
for k, v := range c {
if v == nil {
v = &ProcessorOptionConfig{}
}
return k, v, nil
}
// Never invoked.
return "", nil, errors.New("unexpected number of keys in processor")
}
// UnmarshalJSON contains a workaround for the lack of inline tag support in
// encoding/json.
func (c *ProcessorOptionConfig) UnmarshalJSON(data []byte) error {
// Prevent another call in this UnmarshalJSON.
type opts ProcessorOptionConfig
if err := json.Unmarshal(data, (*opts)(c)); err != nil {
return err
}
var raw map[string]interface{}
if err := json.Unmarshal(data, &raw); err != nil {
return err
}
delete(raw, "id")
delete(raw, "if")
delete(raw, "on_failure")
if len(raw) > 0 {
c.Config = make(map[string]interface{}, len(raw))
}
for k, v := range raw {
c.Config[k] = v
}
return nil
}
// MarshalJSON contains a workaround for the lack of inline tag support in
// encoding/json.
func (c ProcessorOptionConfig) MarshalJSON() ([]byte, error) {
data := map[string]interface{}{}
if c.ID != "" {
data["id"] = c.ID
}
if c.If != "" {
data["if"] = c.If
}
if len(c.OnFailure) > 0 {
data["on_failure"] = c.OnFailure
}
for k, v := range c.Config {
data[k] = v
}
return json.Marshal(data)
}