Home > SYS_MessageBus > pullPublic

SYS_MessageBus.pullPublic() method

Public message bus: pull a message

Signature

function pullPublic(topic: string, callbackFn: (message: any) => void): ISYS_MessageBusTask;

Parameters

Parameter	Type	Description
topic	string	Theme
callbackFn	(message: any) => void	Callback after a message is pulled

Returns

ISYS_MessageBusTask

Message bus task

Remarks

Only one message can be pulled at a time

Example

// 1. 在公共总线注册拉取回调（一次性）
const task = eda.sys_MessageBus.pullPublic('嘉立创示例_公共拉取', (message) => {
	console.log('公共总线拉到：', message);
});

// 2. 用 pushPublic 投递消息，回调立即触发
eda.sys_MessageBus.pushPublic('嘉立创示例_公共拉取', '公共任务甲');

// 3. 取消任务，恢复原状
task.cancel();
console.log('已取消公共拉取任务');