// Helpers.
private async Task <PaginatedList <ContactDto> > ReadFromCache(ContactsQuery query)
{
var cache = await _cache.GetAsync <PaginatedList <ContactDto> >();
cache.Restore(query.PageNumber, query.PageSize);
return(cache);
}
private async Task <PaginatedList <ContactDto> > ReadFromDatabase(ContactsQuery query)
{
var contacts = await _context.Contacts
.Where(e => e.OwnerUserId == query.OwnerUserId)
.ProjectTo <ContactDto>(_mapper.ConfigurationProvider)
.PaginatedListAsync(query.PageNumber, query.PageSize);
await _cache.CreateAsync(contacts);
return(contacts);
}
public async Task <PaginatedList <ContactDto> > Handle(ContactsQuery request,
CancellationToken cancellationToken)
{
try
{
return(await ReadFromCache(request));
}
catch (NotFoundException)
{
return(await ReadFromDatabase(request));
}
}
