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authorSteve Vinoski <[email protected]>2010-02-28 00:13:10 -0500
committerBjörn Gustavsson <[email protected]>2010-05-12 07:40:26 +0200
commit6281020ef3ac85afbfbe811de662ae5e1f19901d (patch)
treebb1c66bc55011631d0ba706908a8e917e6ab754c /lib/stdlib/test/base64_SUITE.erl
parent5ec0ade4105d5d72f318b657bff1a628881cbf9d (diff)
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Add support for the format_status callback to gen_event
The gen_server and gen_fsm behaviors support the format_status callback to allow developers to specialize how callback module state appears within the return value of sys:get_status and within logged output resulting from abnormal process termination. This patch adds similar support to gen_event. Event handlers that export a format_status/2 function, which is an optional callback, and are registered with an event manager will now have their format_status callbacks invoked when sys:get_status is called on the event manager. The term returned from format_status for this case replaces the default handler state in the sys:get_status return value. This patch also extends gen_event to call an event handler's format_status function (if it exports one) should the handler terminate abnormally. The term returned from format_status is logged in place of the handler's state. This is intended to allow developers to control how much output is logged in the case of abnormal termination. The documentation is appropriately extended and new unit tests are added to cover the new gen_event format_status functionality.
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