Cache items by key pattern #5061

0

alper created 6 years ago

Support Team

it's simple

private void RemoveCache()
        {
            _cacheManager.GetCache("MyCacheName").Remove("myCacheKey");
        }

[attachment=1:27jcd50z]remove-cache.jpg[/attachment:27jcd50z]

and remember [attachment=0:27jcd50z]cache-docs.jpg[/attachment:27jcd50z]

0

hitaspdotnet created 6 years ago

Thank you! I missed few lines of documents.

0

hitaspdotnet created 6 years ago

Hi again. I can't find my solution in ABP docs. I have a cache named "App.Adresses". In this cache I have more keys pattern named "Addresses." , "AddressAttribute." and "AddressAttributeValue." Then I writing my items with something like this method :

public async Task<IList<AddressAttributeDto>> GetAllAddressAttributes()
        {
            var key = "AddressAttribute.";

            return await _cacheManager.GetCache("App.Adresses").Get(key, async () =>
             {
                 var query = from aa in (await _addressAttributeRepository.GetAllListAsync())
                             orderby aa.DisplayOrder, aa.Id
                             select aa;
                 return ObjectMapper.Map<IList<AddressAttributeDto>>(query.ToList());
             });

       }

public async Task<AddressAttributeDto> GetAddressAttributeById(EntityDto<long> input)
        {
            var key = string.Format("AddressAttribute.id-{0}", input.Id);

            return await _cacheManager.GetCache("App.Adresses").Get(key, async () =>
            {
                var addressAttribute = await _addressAttributeRepository.FirstOrDefaultAsync(input.Id);
                var output = ObjectMapper.Map<AddressAttributeDto>(addressAttribute);
            });

        }

Question is How you can remove all items in App.Addresses WHERE cache item name contains "AddressAttribute." No matter the item identifier and clear all(only AddressAttribute items) .

0

aaron created 6 years ago

Support Team

That's not supported.

You can replace AbpMemoryCacheManager and AbpMemoryCache, then cast ICache to your implementation to do that.

0

hitaspdotnet created 6 years ago

Hi, Thank you for reply. So how can you get/set item list in memory cache using Abp cache for entities with minor modifications and high usage? e.x Countries list and they States or Provinces (for a address based app)?

0

hitaspdotnet created 6 years ago

Could someone explain to me with a real code? For example, How to caching the list of all the countries from DB in the cache then calling the caches for country list output? :( :? :cry: :| :roll:

0

hitaspdotnet created 6 years ago

Thanks for any tips! :(

0

hitaspdotnet created 6 years ago

Can not guide me? I'm waiting for two days here :cry: :cry: :cry: :cry: :cry:

0

hitaspdotnet created 6 years ago

[AutoMapFrom(typeof(Country))]
    public class CountryCacheItem
    {
        public long Id { get; set; }

        public string Name { get; set; }

        public string TwoLetterIsoCode { get; set; }

        public string ThreeLetterIsoCode { get; set; }

        public int NumericIsoCode { get; set; }

        public bool AllowBilling { get; set; }

        public bool AllowShipping { get; set; }

        public bool Published { get; set; }

        public int DisplayOrder { get; set; }

        public ICollection<StateOrProvince> StateOrProvinces { get; set; }
    }

public interface ICountryCache : IEntityCache<CountryCacheItem, long>
    {
    }

public class CountryCache 
        : EntityCache<Country, CountryCacheItem, long>,
        ICountryCache,
        ISingletonDependency
    {
        public CountryCache(ICacheManager cacheManager,
            IRepository<Country, long> repository): base(cacheManager, repository)
        {
        }
    }

What's my next step to get list of countries without query to database

0

alper created 6 years ago

Support Team

see <a class="postlink" href="https://stackoverflow.com/a/47654289/1767482">https://stackoverflow.com/a/47654289/1767482</a>

0

alper created 6 years ago

Support Team

If the current cache mechanism doesn't fit for you can create a new domain service.

using System.Collections.Generic;
using Abp.Domain.Repositories;
using Abp.Domain.Entities;
using Abp.Domain.Services;

namespace MyCompanyName.AbpZeroTemplate.Friendships.Cache
{
    public class Country : Entity
    {
        public string Name { get; set; }

        public string TwoLetterIsoCode { get; set; }

        public string ThreeLetterIsoCode { get; set; }

        public int NumericIsoCode { get; set; }

        public bool AllowBilling { get; set; }

        public bool Published { get; set; }

        public int DisplayOrder { get; set; }
    }

    public class CountryManager : IDomainService
    {
        private readonly IRepository<Country> _countryRepository;

        private List<Country> _countries = null;

        public List<Country> Countries
        {
            get
            {
                if (_countries == null)
                {
                    _countries = GetAllCountries();
                }

                return _countries;
            }
        }

        public CountryManager(IRepository<Country> countryRepository)
        {
            _countryRepository = countryRepository;
        }

        private List<Country> GetAllCountries()
        {
            return _countryRepository.GetAllList();
        }
    }

    public class MyTestUsage
    {
        private readonly CountryManager _countryManager;

        public MyTestUsage(CountryManager countryManager)
        {
            _countryManager = countryManager;
        }

        private void Test()
        {
            var listOfCountries = _countryManager.Countries;
        }
    }
}

0

hitaspdotnet created 6 years ago

This made me study more and check UserFriendsCache. I noticed that the UserFriendsCache is a domain service and should coding like a CRUD domain service. A line in the ABP docs made me wrong. The guide says That's it. Our person cache is ready to use!. Because of this, I thought I could use CountryCache like a repository in my AppServices!

Since my English is weak, this mistake is not understood. Thanks again to the Master @Alper

0

alper created 6 years ago

Support Team

you're welcome ;)

13 Answer(s)