exec component: A component for executing local commands. It is used for automation, offline analysis, large model scheduling, CI/CD, and other scenarios.

Configuration

Field	Type	Description	Default Value
cmd	string	Command, can use ${metaKeyName} to replace variables in metadata	None
args	[]string	List of command arguments	None
log	bool	Whether to print standard output, true: command standard output will trigger OnDebug function	false
replaceData	bool	Whether to pass the standard output to the next node	false

TIP

1. By default, no commands can be run; a whitelist needs to be set.
2. Only commands on the whitelist are allowed to execute, set the whitelist with key=execNodeWhitelist, separated by commas. Example: config.Properties.PutValue(KeyExecNodeWhitelist,"cd,ls,go")
3. The previous node is allowed to set the command execution directory through metadata key=workDir, e.g., Metadata.PutValue("workDir","./data")

Relation Type

• Success: If the script executes successfully, send the message to the Success chain.
• Failure: If the script execution fails, send the message to the Failure chain.

Execution Result

If replaceData=true, the script execution result replaces msg.Data and flows to the next node. Otherwise, msg.Data remains unchanged.

Configuration Example

  {
  "id": "s1",
  "type": "exec",
  "name": "Execute Local Command",
  "configuration": {
    "cmd": "ls",
    "args": ["."]
  }
 }