Javascript Message

Revision as of 13:17, 30 August 2024

Yate Message object

Constructor

• new Message(name)
• new Message(name,broadcast,obj)

Parameters:
name - Name of the message to create (mandatory)
broadcast - Optional boolean flag to create a broadcast message
obj - Optional object from which to copy properties as message parameters. Objects, null and undefined values are not copied.

Static Methods

• Message.install()

• Message.uninstall()

• Message.handlers()
• Message.handlers(match)

Parameters:
match - Optional string or RegExp used to match only some handler names
Return:
Array of objects describing installed handlers, null if no handler matches.

• name - String name of the handled messages
• priority - Integer priority of the installed handler
• handler - String name of the handling function
• filterName - String name of the filtering parameter (only if a filter is installed)
• filterValue - String value of the filtering parameter (only if a filter is installed)
• trackName - String name of the handler used in tracking (only if not empty)

• Message.installHook()

• Message.uninstallHook()

• Message.trackName()

Return:
Message handler(s) track name value

• Message.trackName(name[,trackPrio])

Parameters:
name - Message track name to be set in new message handlers
trackPrio - Add handler priority to track name. Default: true

Methods

• enqueue([callback[,reserved,parameters...]])

Enqueues the Message in the Yate engine
Parameters:
callback - Optional function to be called after message is dispatch
reserved - Parameter reserved for future use
parameters - Optional parameters to be passed to callback function
Return: True if enqueue succeeded, false on failure

Callback function definition: function some_func_name(msg,accepted[,parameters...])

• dispatch()
• dispatch(unblock)

Parameters:
unblock - Optional boolean flag to unblock context variables during dispatch
Return: True if message was handled, false if it was not handled

NOTES on message dispatch without unblocking the context:

1. Will prevent script processing of other callbacks: message handling, timer callbacks
2. Leads to deadlock if script have a handler for the dispatched message
3. Script unload will wait until context is unblocked

• name()

Return: String name of the message

• broadcast()

Return: Boolean broadcast flag

• getParam(name)
• getParam(name,defValue)
• getParam(name,defValue,autoNumber)

Parameters:
name - Name of the parameter to retrieve
defValue - Value to return if parameter is missing, default undefined
autoNumber - Automatically convert parameters to boolean or number type, default true
Return: Value of parameter, even if name matches a method name

• setParam(name,value)

Parameters:
name - Name of the parameter to set
value - New value to set in parameter, undefined to delete the parameter
Return: True on success, false if message was not in a state where parameters can be changed

• copyParams(obj,prefix,skip)

Parameters:
obj - object from which to copy properties (except objects, null and undefined)
prefix - optional parameter to specify that only properties that a key with the given index should be copied. If the prefix represents an object, the properties of that object will be copied.
skip - optional parameter (assumed, by default, to be true) to specifies if the prefix should be copied or eliminated from the key being copied.

• retValue()

Return: Returned value of the message

• retValue(value)

Parameters:
value - New returned value to set in the message

• msgTime()

Return: Message creation time in milliseconds since EPOCH

• getColumn()

• getRow()

• getResult()