Hooks, when added, are stored in an object. Properties of that object are hook's events and values are arrays of handlers.
Examples
// assuming that you already have cache instance prepared
const hook1 = {
event: 'preGetItem',
handler: () => { ... } // some function that does something, not relevant here
}
const hook2 = {
event: 'postSetItem',
handler: () => { ... } // some function that does something, not relevant here
}
cache.addHooks([ hook1, hook2 ]);
// In cache, hooks will be stored like so:
{
hooks: {
preGetItem: [
() => {} // handler from hook1
],
postSetItem: [
() => {} // handler from hook2
]
}
}
cache.getHooks(); // it will return object shown above
What will happen when I will add more hooks with same event names?
// continuing from the example above
const hook3 = {
event: 'preGetItem',
handler: () => {}
}
cache.addHook(hook3);
//right now hooks will look like so:
{
hooks: {
preGetItem: [
() => {} // handler from hook1,
() => {} // handler from hook3, added to the end of the list of hooks for given event
],
postSetItem: [
() => {} // handler from hook2
]
}
}
