metabuilder/workflow/plugins/go

Go Workflow Plugins

Go plugins for MetaBuilder workflow engine. Follows the same interface pattern as Python plugins.

Plugin Interface

// All plugins implement this signature
func Run(runtime *plugin.Runtime, inputs map[string]interface{}) (map[string]interface{}, error)

The runtime object provides:

• Store - Workflow state storage (persists between nodes)
• Context - Shared context (clients, configuration)
• Logger - Logging interface

Categories

Category	Plugins	Purpose
convert	to_string, to_number, to_boolean, to_json, parse_json	Type conversion
list	concat, length, slice, reverse	List operations
logic	and, or, not, equals, gt, lt	Boolean logic
math	add, subtract, multiply, divide	Arithmetic
string	concat, split, replace, upper, lower	String manipulation
var	get, set, delete	Variable management

Example Usage

In Workflow JSON

{
  "version": "2.2.0",
  "nodes": [
    {
      "id": "add-numbers",
      "type": "operation",
      "op": "go.math.add",
      "params": {
        "numbers": [1, 2, 3, 4, 5]
      }
    },
    {
      "id": "format-result",
      "type": "operation",
      "op": "go.string.concat",
      "params": {
        "strings": ["Sum: ", "{{ $nodes['add-numbers'].result }}"],
        "separator": ""
      }
    }
  ],
  "connections": [
    { "from": "add-numbers", "to": "format-result" }
  ]
}

Performance

Go plugins are compiled to native code, offering:

• 10-100x faster than Python for CPU-bound operations
• Low memory footprint for concurrent execution
• No GIL - true parallelism

Best for:

• High-throughput data processing
• Concurrent operations
• Memory-efficient batch operations