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  3. RapidContext.Procedure

Class RapidContext.Procedure

Procedure(procedure)

The procedure wrapper function. Used to provide a simplified way of calling a procedure and connecting results through signals (instead of using promise callbacks).

The actual calls are performed with normal function calls, but the results are asynchronous. When called, the procedure function returns a RapidContext.Async promise (as the normal API call), but the results will also be signalled through the onsuccess signal.

Differing from normal functions, a procedure function will also ensure that only a single call is in progress at any time, automatically cancelling any previous call if needed.

Constructor Summary
Creates a new procedure caller function.
Method Summary
Cancels any current execution of this procedure.
Calls the procedure multiple times (in sequence) with different arguments (supplied as an array of argument arrays).
Calls the procedure with the same arguments as used in the last call.
Cancels any current execution and removes the reference to the arguments of this procedure.
(static)
Creates a new procedure caller for each key-value-pair in the specified object.
Event Summary
Emitted when the procedure is called.
Emitted when a procedure call was cancelled.
Emitted when a procedure call failed.
Emitted when the procedure response has been received.
Emitted when a procedure call returned a result.
Emitted if a partial procedure result is available.

Constructor

new Procedure(procedure)

Creates a new procedure caller function. This function can be called either as a constructor or as a plain function. In both cases it returns a new JavaScript function with additional methods.

Properties:
Name Type Description
procedure {string} The procedure name.
args {Array} The arguments used in the last call.
Parameters:
Name Type Description
procedure {string} the procedure name
Source:
RapidContext_Procedure.js, line 17

Methods

cancel()

Cancels any current execution of this procedure. This method does nothing if no procedure call was currently executing.

Parameters:
Type Description
Source:
RapidContext_Procedure.js, line 222

multicall(args, transformopt) → {Promise}

Calls the procedure multiple times (in sequence) with different arguments (supplied as an array of argument arrays). The calls are asynchronous, so results will not be returned by this method. Instead an array with the results will be available through the onupdate and onsuccess signals, for example.

Note that any previously running call will automatically be cancelled, since only a single call can be processed at any time. A result transform function can be supplied to transform each individual result. If the transform function throws an error, that result will be omitted.

Parameters:
Name Type Attributes Description
args {Array} the array of argument arrays
transform {function} <optional>
 the optional result transform function
Returns:
{Promise} a RapidContext.Async promise that will resolve with the response data or error
Source:
RapidContext_Procedure.js, line 172

recall() → {Promise}

Calls the procedure with the same arguments as used in the last call. The call is asynchronous, so results will not be returned by this method. Instead the results will be available through the onsuccess signal, for example.

Note that any previously running call will automatically be cancelled, since only a single call can be processed at any time.

Parameters:
Type Description
Returns:
{Promise} a RapidContext.Async promise that will resolve with the response data or error
Source:
RapidContext_Procedure.js, line 129

reset()

Cancels any current execution and removes the reference to the arguments of this procedure.

Parameters:
Type Description
Source:
RapidContext_Procedure.js, line 238

(static) mapAll(obj) → {Object}

Creates a new procedure caller for each key-value-pair in the specified object.

Parameters:
Name Type Description
obj {Object} an object mapping keys to procedure names
Returns:
{Object} an object mapping keys to procedure instances
Source:
RapidContext_Procedure.js, line 251

Events

oncall

Emitted when the procedure is called. Each call corresponds to exactly one oncall and one onresponse event (even if the call was cancelled). No event data will be sent.

Source:
RapidContext_Procedure.js, line 57

oncancel

Emitted when a procedure call was cancelled. This event is emitted after the onresponse event, but only if the procedure call was cancelled. Use the onsuccess or onerror for other result statuses. No event data will be sent.

Source:
RapidContext_Procedure.js, line 106

onerror

Emitted when a procedure call failed. This event is emitted after the onresponse event, but only if the procedure call returned an error. Use the onsuccess or oncancel for other result statuses. The call error object will be sent as the event data.

Source:
RapidContext_Procedure.js, line 96

onresponse

Emitted when the procedure response has been received. Each call corresponds to exactly one oncall and one onresponse event (even if the call was cancelled). The call response or error object will be sent as the event data.

Source:
RapidContext_Procedure.js, line 76

onsuccess

Emitted when a procedure call returned a result. This event is emitted after the onresponse event, but only if the procedure call actually succeeded. Use the onerror or oncancel signals for other result statuses. The call response object will be sent as the event data.

Source:
RapidContext_Procedure.js, line 86

onupdate

Emitted if a partial procedure result is available. This event will only be emitted when performing a multi-call, along with the oncall and onresponse events (for each call). The partial procedure result will be sent as the event data.

Source:
RapidContext_Procedure.js, line 66
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