Object Chain

message handler chain processing object

The message handler chain processing object is used to link a series of message handlers and process them in a chain according to the specified order. Create method:

1
2
3
var chain = new mq.Chain([
    func1, func2
]);

inheritance relationship

Constructor

Chain

Constructs a message handler chain processing object

1
new Chain(Array hdlrs);

Call parameters:

• hdlrs: Array, array of handlers

member function

append

Add an array of processors

1
Chain.append(Array hdlrs);

Call parameters:

• hdlrs: Array, array of handlers

---

add processor

1
Chain.append(Handler hdlr);

Call parameters:

• hdlr:Handler, built-in message handlers, handler functions, chained processing arrays, routing objects, see detailsmq.Handler

---

invoke

handle a message or object

1
Handler Chain.invoke(object v) async;

Call parameters:

• v:object, specifies the message or object to process

Return result:

• Handler, return to the next handler

---

toString

Returns the string representation of the object, generally returns "[Native Object]", the object can be reimplemented according to its own characteristics

1
String Chain.toString();

Return result:

• String, returns the string representation of the object

---

toJSON

Returns the JSON format representation of the object, generally returns the set of readable properties defined by the object

1
Value Chain.toJSON(String key = "");

Call parameters:

• key: String, unused

Return result:

• Value, returns a value containing JSON serializable