ballerina/lang.runtime

function deregisterListener(DynamicListener 'listener)

Deregisters a listener from a module.

The listener ceases to be a module listener of the module from which this function is called.

runtime:DynamicListener ln = object {
    public function 'start() returns error? {}
    public function gracefulStop() returns error? {}
    public function immediateStop() returns error? {}
};
runtime:deregisterListener(ln);

function getStackTrace() returns StackFrame[]

Returns a stack trace for the current call stack.

runtime:StackFrame[] stackTrace = runtime:getStackTrace();

The first member of the array represents the top of the call stack.

function onGracefulStop(StopHandler 'handler)

Registers a function that will be called during graceful shutdown. A call to onGracefulStop will result in one call to the handler function that was passed as an argument; the handler functions will be called after calling gracefulStop on all registered listeners, in reverse order of the corresponding calls to onGracefulStop.

runtime:onGracefulStop(function() returns error? {});

function registerListener(DynamicListener 'listener)

Registers a listener object with a module.

The listener becomes a module listener of the module from which this function is called.

runtime:DynamicListener ln = object {
    public function 'start() returns error? {}
    public function gracefulStop() returns error? {}
    public function immediateStop() returns error? {}
};
runtime:registerListener(ln);

function sleep(decimal seconds)

Halts the current strand for a predefined amount of time.

runtime:sleep(5);