To share data between nodes, it is recommended to use the Metadata or Data of msg, but if you need to pass semaphores or pointers, you can also use the context.Context method.

Usage example:

ruleEngine.OnMsg(msg, types.WithContext(context.WithValue(context.Background(), shareKey, shareValue)))

Component to get shared data:

func (n *TimeNode) OnMsg(ctx types.RuleContext, msg types.RuleMsg)  {
	//context method to get shared data
	v1 := ctx.GetContext().Value(shareKey)
	//context method to modify shared data
    modifyCtx := context.WithValue(ctx.GetContext(), addShareKey, addShareValue)
    ctx.SetContext(modifyCtx)
	
	//msg.Metadata method to get shared data
    v2 :=msg.Metadata.GetValue("timestamp")
	//msg.Metadata method to modify shared data
    msg.Metadata.PutValue("timestamp", time.Now().Format(time.RFC3339))
	ctx.TellSuccess(msg)
}