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This files describes API changes in core_xapi libraries and APIs,
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information provided here is intended especially for developers.
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=== 4.3 ===
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* The default state store will throw and exception if the activity ID is not
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a numeric value. This is to avoid problems with the database when using
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the default state store. If a plugin requires a non numeric activity ID,
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it must implement its own state store.
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* New xAPI state webservices:
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- core_xapi_delete_states: delete all user state data for an activity
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=== 4.2 ===
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* A new state store has been introduced. Now plugins can store state data
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by overriding the PLUGINNAME\xapi\handler::validate_state method.
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* New core_xapi\state_store class to handle the state data storing. Plugins
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can provide alternative state store implementations by overriding the
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PLUGINNAME\xapi\handler::get_state_store method.
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* New xAPI state webservices:
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- core_xapi_post_state: store a user state data
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- core_xapi_get_state: gets a user state data
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- core_xapi_get_states: get the list of user states
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- core_xapi_delete_state: delete a user state data
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