NAME Async::ContextSwitcher - helps track execution context in async programs DESCRIPTION This is a very simple module that helps you carry around execution context in async programs. Idea is simple: * you create a "new" context for an entry point It can be a new web request, a new message from a queue to process or command line script command * use "cb_w_context" to create all callbacks in your application * correct context restored when your callbacks are called * use "context" to access data METHODS and FUNCTIONS new Creates a new context and makes it the current one. Takes named pairs and stores them in the context. Async::ContextSwitcher->new( request => $psgi_env ); context Returns the current context. Function is exported. Always returns context. my $ct = context->{request}{HTTP_CONTENT_TYPE}; context->{user} = $user; cb_w_context Wrapper for callbacks. Function is exported. Wraps a callback with code that stores and restores context to make sure correct context travels with your code. async_call( callback => cb_w_context { context->{good} = shift } ); Make sure that all callbacks in your code are created with this function or you can loose track of your context. AUTHOR Ruslan Zakirov <Ruslan.Zakirov@gmail.com> LICENSE Under the same terms as perl itself.