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* Add json_extract plugin * Rework with jx * Fix genFields for benchs * gen-doc * rework
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,11 @@ | ||
| # JSON extract plugin | ||
| @introduction | ||
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| ### Examples | ||
| @examples | ||
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| ### Benchmarks | ||
| @benchmarks | ||
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| ### Config params | ||
| @config-params|description |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| # JSON extract plugin | ||
| It extracts a field from JSON-encoded event field and adds extracted field to the event root. | ||
| > If extracted field already exists in the event root, it will be overridden. | ||
| ### Examples | ||
| ```yaml | ||
| pipelines: | ||
| example_pipeline: | ||
| ... | ||
| actions: | ||
| - type: json_extract | ||
| field: log | ||
| extract_field: error.code | ||
| ... | ||
| ``` | ||
| The original event: | ||
| ```json | ||
| { | ||
| "log": "{\"level\":\"error\",\"message\":\"error occurred\",\"service\":\"my-service\",\"error\":{\"code\":2,\"args\":[]}}", | ||
| "time": "2024-03-01T10:49:28.263317941Z" | ||
| } | ||
| ``` | ||
| The resulting event: | ||
| ```json | ||
| { | ||
| "log": "{\"level\":\"error\",\"message\":\"error occurred\",\"service\":\"my-service\",\"error\":{\"code\":2,\"args\":[]}}", | ||
| "time": "2024-03-01T10:49:28.263317941Z", | ||
| "code": 2 | ||
| } | ||
| ``` | ||
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| ### Benchmarks | ||
| Performance comparison of `json_extract` and `json_decode` plugins. | ||
| `json_extract` on average 3 times faster than `json_decode`. | ||
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| | json (length) | json_extract (time ns) | json_decode (time ns) | | ||
| |---------------|------------------------|-----------------------| | ||
| | 129 | 33 | 176 | | ||
| | 309 | 264 | 520 | | ||
| | 2109 | 2263 | 6778 | | ||
| | 10909 | 11289 | 32205 | | ||
| | 21909 | 23277 | 62819 | | ||
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| ### Config params | ||
| **`field`** *`cfg.FieldSelector`* *`required`* | ||
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| The event field from which to extract. Must be a string. | ||
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| <br> | ||
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| **`extract_field`** *`cfg.FieldSelector`* *`required`* | ||
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| Field to extract. | ||
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| <br> | ||
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| <br>*Generated using [__insane-doc__](https://github.com/vitkovskii/insane-doc)* |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,167 @@ | ||
| package json_extract | ||
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| import ( | ||
| "bytes" | ||
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| "github.com/go-faster/jx" | ||
| "github.com/ozontech/file.d/cfg" | ||
| "github.com/ozontech/file.d/fd" | ||
| "github.com/ozontech/file.d/pipeline" | ||
| insaneJSON "github.com/vitkovskii/insane-json" | ||
| ) | ||
|
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| /*{ introduction | ||
| It extracts a field from JSON-encoded event field and adds extracted field to the event root. | ||
| > If extracted field already exists in the event root, it will be overridden. | ||
| }*/ | ||
|
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| /*{ examples | ||
| ```yaml | ||
| pipelines: | ||
| example_pipeline: | ||
| ... | ||
| actions: | ||
| - type: json_extract | ||
| field: log | ||
| extract_field: error.code | ||
| ... | ||
| ``` | ||
| The original event: | ||
| ```json | ||
| { | ||
| "log": "{\"level\":\"error\",\"message\":\"error occurred\",\"service\":\"my-service\",\"error\":{\"code\":2,\"args\":[]}}", | ||
| "time": "2024-03-01T10:49:28.263317941Z" | ||
| } | ||
| ``` | ||
| The resulting event: | ||
| ```json | ||
| { | ||
| "log": "{\"level\":\"error\",\"message\":\"error occurred\",\"service\":\"my-service\",\"error\":{\"code\":2,\"args\":[]}}", | ||
| "time": "2024-03-01T10:49:28.263317941Z", | ||
| "code": 2 | ||
| } | ||
| ``` | ||
| }*/ | ||
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| /*{ benchmarks | ||
| Performance comparison of `json_extract` and `json_decode` plugins. | ||
| `json_extract` on average 3 times faster than `json_decode`. | ||
| | json (length) | json_extract (time ns) | json_decode (time ns) | | ||
| |---------------|------------------------|-----------------------| | ||
| | 129 | 33 | 176 | | ||
| | 309 | 264 | 520 | | ||
| | 2109 | 2263 | 6778 | | ||
| | 10909 | 11289 | 32205 | | ||
| | 21909 | 23277 | 62819 | | ||
| }*/ | ||
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| type Plugin struct { | ||
| config *Config | ||
| decoder *jx.Decoder | ||
| } | ||
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| // ! config-params | ||
| // ^ config-params | ||
| type Config struct { | ||
| // > @3@4@5@6 | ||
| // > | ||
| // > The event field from which to extract. Must be a string. | ||
| Field cfg.FieldSelector `json:"field" parse:"selector" required:"true"` // * | ||
| Field_ []string | ||
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| // > @3@4@5@6 | ||
| // > | ||
| // > Field to extract. | ||
| ExtractField cfg.FieldSelector `json:"extract_field" parse:"selector" required:"true"` // * | ||
| ExtractField_ []string | ||
| } | ||
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| func init() { | ||
| fd.DefaultPluginRegistry.RegisterAction(&pipeline.PluginStaticInfo{ | ||
| Type: "json_extract", | ||
| Factory: factory, | ||
| }) | ||
| } | ||
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| func factory() (pipeline.AnyPlugin, pipeline.AnyConfig) { | ||
| return &Plugin{}, &Config{} | ||
| } | ||
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| func (p *Plugin) Start(config pipeline.AnyConfig, _ *pipeline.ActionPluginParams) { | ||
| p.config = config.(*Config) | ||
| p.decoder = &jx.Decoder{} | ||
| } | ||
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| func (p *Plugin) Stop() {} | ||
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| func (p *Plugin) Do(event *pipeline.Event) pipeline.ActionResult { | ||
| jsonNode := event.Root.Dig(p.config.Field_...) | ||
| if jsonNode == nil { | ||
| return pipeline.ActionPass | ||
| } | ||
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| p.decoder.ResetBytes(jsonNode.AsBytes()) | ||
| extract(event.Root, p.decoder, p.config.ExtractField_, 0, false) | ||
| return pipeline.ActionPass | ||
| } | ||
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| // extract extracts field from decoder and adds it to the root. | ||
| // `skipAddField` flag is required for proper benchmarking. | ||
| func extract(root *insaneJSON.Root, d *jx.Decoder, field []string, depth int, skipAddField bool) { | ||
| objIter, err := d.ObjIter() | ||
| if err != nil { | ||
| return | ||
| } | ||
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| for objIter.Next() { | ||
| if bytes.Equal(objIter.Key(), pipeline.StringToByteUnsafe(field[depth])) { | ||
| if depth == len(field)-1 { // add field | ||
| if skipAddField { | ||
| _ = d.Skip() | ||
| } else { | ||
| addField(root, field[depth], d) | ||
| } | ||
| } else { // go deep | ||
| raw, err := d.Raw() | ||
| if err != nil { | ||
| break | ||
| } | ||
| d.ResetBytes(raw) | ||
| extract(root, d, field, depth+1, skipAddField) | ||
| } | ||
| break | ||
| } else if err = d.Skip(); err != nil { | ||
| break | ||
| } | ||
| } | ||
| } | ||
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| func addField(root *insaneJSON.Root, field string, d *jx.Decoder) { | ||
| switch d.Next() { | ||
| case jx.Number: | ||
| num, _ := d.Num() | ||
| intVal, err := num.Int64() | ||
| if err == nil { | ||
| root.AddFieldNoAlloc(root, field).MutateToInt64(intVal) | ||
| } else { | ||
| floatVal, err := num.Float64() | ||
| if err == nil { | ||
| root.AddFieldNoAlloc(root, field).MutateToFloat(floatVal) | ||
| } | ||
| } | ||
| case jx.String: | ||
| s, _ := d.StrBytes() | ||
| root.AddFieldNoAlloc(root, field).MutateToBytesCopy(root, s) | ||
| case jx.Null: | ||
| root.AddFieldNoAlloc(root, field).MutateToNull() | ||
| case jx.Bool: | ||
| b, _ := d.Bool() | ||
| root.AddFieldNoAlloc(root, field).MutateToBool(b) | ||
| case jx.Object, jx.Array: | ||
| raw, _ := d.Raw() | ||
| root.AddFieldNoAlloc(root, field).MutateToJSON(root, raw.String()) | ||
| default: | ||
| _ = d.Skip() | ||
| } | ||
| } |
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