通用包
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
utils/pkg/es/script.go

161 lines
4.3 KiB

2 years ago
// Copyright 2012-present Oliver Eilhard. All rights reserved.
// Use of this source code is governed by a MIT-license.
// See http://olivere.mit-license.org/license.txt for details.
package es
import (
"encoding/json"
"errors"
"fmt"
"strings"
)
// Script holds all the parameters necessary to compile or find in cache
// and then execute a script.
//
// See https://www.elastic.co/guide/en/elasticsearch/reference/7.0/modules-scripting.html
// for details of scripting.
type Script struct {
script string
typ string
lang string
params map[string]interface{}
}
// NewScript creates and initializes a new Script. By default, it is of
// type "inline". Use NewScriptStored for a stored script (where type is "id").
func NewScript(script string) *Script {
return &Script{
script: script,
typ: "inline",
params: make(map[string]interface{}),
}
}
// NewScriptInline creates and initializes a new inline script, i.e. code.
func NewScriptInline(script string) *Script {
return NewScript(script).Type("inline")
}
// NewScriptStored creates and initializes a new stored script.
func NewScriptStored(script string) *Script {
return NewScript(script).Type("id")
}
// Script is either the cache key of the script to be compiled/executed
// or the actual script source code for inline scripts. For indexed
// scripts this is the id used in the request. For file scripts this is
// the file name.
func (s *Script) Script(script string) *Script {
s.script = script
return s
}
// Type sets the type of script: "inline" or "id".
func (s *Script) Type(typ string) *Script {
s.typ = typ
return s
}
// Lang sets the language of the script. The default scripting language
// is Painless ("painless").
// See https://www.elastic.co/guide/en/elasticsearch/reference/7.0/modules-scripting.html
// for details.
func (s *Script) Lang(lang string) *Script {
s.lang = lang
return s
}
// Param adds a key/value pair to the parameters that this script will be executed with.
func (s *Script) Param(name string, value interface{}) *Script {
if s.params == nil {
s.params = make(map[string]interface{})
}
s.params[name] = value
return s
}
// Params sets the map of parameters this script will be executed with.
func (s *Script) Params(params map[string]interface{}) *Script {
s.params = params
return s
}
// Source returns the JSON serializable data for this Script.
func (s *Script) Source() (interface{}, error) {
if s.typ == "" && s.lang == "" && len(s.params) == 0 {
return s.script, nil
}
source := make(map[string]interface{})
// Beginning with 6.0, the type can only be "source" or "id"
if s.typ == "" || s.typ == "inline" {
src, err := s.rawScriptSource(s.script)
if err != nil {
return nil, err
}
source["source"] = src
} else {
source["id"] = s.script
}
if s.lang != "" {
source["lang"] = s.lang
}
if len(s.params) > 0 {
source["params"] = s.params
}
return source, nil
}
// rawScriptSource returns an embeddable script. If it uses a short
// script form, e.g. "ctx._source.likes++" (without the quotes), it
// is quoted. Otherwise it returns the raw script that will be directly
// embedded into the JSON data.
func (s *Script) rawScriptSource(script string) (interface{}, error) {
v := strings.TrimSpace(script)
if !strings.HasPrefix(v, "{") && !strings.HasPrefix(v, `"`) {
v = fmt.Sprintf("%q", v)
}
raw := json.RawMessage(v)
return &raw, nil
}
// -- Script Field --
// ScriptField is a single script field.
type ScriptField struct {
FieldName string // name of the field
script *Script
ignoreFailure *bool // used in e.g. ScriptSource
}
// NewScriptField creates and initializes a new ScriptField.
func NewScriptField(fieldName string, script *Script) *ScriptField {
return &ScriptField{FieldName: fieldName, script: script}
}
// IgnoreFailure indicates whether to ignore failures. It is used
// in e.g. ScriptSource.
func (f *ScriptField) IgnoreFailure(ignore bool) *ScriptField {
f.ignoreFailure = &ignore
return f
}
// Source returns the serializable JSON for the ScriptField.
func (f *ScriptField) Source() (interface{}, error) {
if f.script == nil {
return nil, errors.New("ScriptField expects script")
}
source := make(map[string]interface{})
src, err := f.script.Source()
if err != nil {
return nil, err
}
source["script"] = src
if v := f.ignoreFailure; v != nil {
source["ignore_failure"] = *v
}
return source, nil
}