Rule Engine Golang

• Setup
• Run
• Rule Engine
• Example Developer Test

Setup

$ go build

Run

$ dipper-engine -h

NAME:
   Dipper Engine - Rule Engine

USAGE:
   Dipper Engine [global options] command [command options] [arguments...]

COMMANDS:
   help, h  Shows a list of commands or help for one command

GLOBAL OPTIONS:
   --bus value, -b value       Bus type: [chan, redis] (default: "chan")
   --config value, -c value    Config file (default: "config.json")
   --help, -h                  show help (default: false)
   --plugin, -p                Load Plugin (default: false)
   --queue value, -q value     Queue type: [chan, redis] (default: "chan")
   --redis-host value          Redis host (default: "127.0.0.1:6379")
   --redis-pass value          Redis pass
   --redis-timeout value       Redis Time out
   --session-from-queue, --sq  Session from queue (default: false)
   --store value, -s value     Store type: [memory, redis] (default: "memory")

$ dipper-engine

Start Dipper Engine

Rules: 5
-----------------------------------------------------------
No  Rule Name                  Worker  Infinity  Status  
1   arithmetic                 1       false     enable  
2   conditional                1       false     enable  
3   fork                       1       false     enable  
4   input-redis-queue          0       true      disable 
5   input-redis-queue-extend   1       true      enable  
6   log-core                   1       false     enable  
7   output-redis-queue         0       false     disable 
8   output-redis-queue-extend  1       false     enable  
9   switch                     1       false     enable
-----------------------------------------------------------

Running Engine...

Rule Engine

No	Rule	Description	Infinity	Doc
1	arithmetic	operator match rule	false
2	conditional	compare data rule	false
3	fork	fork to rules	false
4	input-redis-queue	input data from queue on config	true
5	input-redis-queue-extend	input data from queue on option	true
6	log-core	log to console	false
7	output-redis-queue	output data from queue on config	false
8	output-redis-queue-extend	output data from queue on option	false
9	switch	switch to rules	false

Example Developer Test

c := engine.New()

c.Hook(engine.AfterStart, func(dipper *core.DipperEngine, c *cli.Context) error {
    
    factoryResultSessionName := core.FactoryQueueNameDefault[*data.ResultSession]()
    dipper.SessionOutputQueue(factoryResultSessionName)
    
    dipper.OutputSubscribe(context.TODO(), func(sessionDeliver *queue.Deliver[*data.ResultSession]) {
        debug.PrintJson(sessionDeliver.Data, "Result: ")
        sessionDeliver.Ack()
    })
    
    return dipper.Add(context.Background(), &data.Session{
        Data: map[string]interface{}{
            "default": map[string]interface{}{
                "a": 10,
                "b": 20,
                "d": 5,
            },
        },
        ChanId:   "test-1",
        RootNode: "1",
        MapNode: map[string]*data.NodeRule{
            "1": {
                Debug: false,
                Option: map[string]interface{}{
                        "operators": map[string]string{
                        "c": "a+b",
                    },
                    "next_error":   "2",
                    "next_success": "3",
                    "debug":        false,
                },
                NodeId: "4",
                RuleId: "arithmetic",
                End:    false,
            },
            "2": {
                Debug: false,
                Option: map[string]interface{}{
                    "debug": false,
                },
                NodeId: "2",
                RuleId: "log-core",
                End:    true,
            },
            "3": {
                Debug: false,
                Option: map[string]interface{}{
                    "next_success": []string{"5", "2"},
                    "debug":        false,
                },
                NodeId: "3",
                RuleId: "fork",
                End:    false,
            },
            "5": {
                Debug: false,
                Option: map[string]interface{}{
                    "conditional":         "a == b",
                    "set_param_result_to": "cond_a_b",
                    "next_error":          "2",
                    "next_true":           "2",
                    "next_false":          "2",
                    "debug":               false,
                },
                NodeId: "5",
                RuleId: "conditional",
                End:    false,
            },
        },
    })
})

if err := c.Run(os.Args); err != nil {
    log.Fatal(err)
}