Clear all keys + clear the entire database

[Misiu]

I have a use case where I need to clear (invalidate) all the keys, Right now I'm using below code:

var tags = _cache.GetAllTags().ToArray();
await _cache.InvalidateKeysByTagAsync(tags);

but I also have some other items in Redis I need to remove, so I'm wondering it is would be good to add three new methods: InvalidateAllKeys InvalidateAllKeysAsync FlushAllDatabases

I have this implemented as a extension methods:

public static class ContextExtensions
{
    /// <summary>
    /// Removes all items in all databases
    /// </summary>
    public static void FlushAllDatabases(this IContext context)
    {
        var connectionMultiplexer = context.GetConnectionMultiplexer();
        var endpoints = connectionMultiplexer.GetEndPoints(true);
        foreach (var endpoint in endpoints)
        {
            var server = connectionMultiplexer.GetServer(endpoint);
            server.FlushAllDatabases();
        }
    }
}

public static class CacheProviderExtensions
{
    /// <summary>
    /// Removes all the keys related to all tags.
    /// </summary>
    public static void InvalidateAll(this ICacheProvider cacheProvider)
    {
        var tags = cacheProvider.GetAllTags().ToArray();
        cacheProvider.InvalidateKeysByTag(tags);
    }
    /// <summary>
    /// Removes all the keys related to all tags.
    /// </summary>
    public static async Task InvalidateAllAsync(this ICacheProvider cacheProvider)
    {
        var tags = cacheProvider.GetAllTags().ToArray();
        await cacheProvider.InvalidateKeysByTagAsync(tags);
    }
}

maybe it is worth adding to the lib?

[thepirat000]

FlushAll is already provided:

https://github.com/thepirat000/CachingFramework.Redis/blob/e457548eafd6e2d4453ffadfe0790c96bcc24d54/src/CachingFramework.Redis/Providers/RedisCacheProvider.cs#L1913

[Misiu]

@thepirat000 thank you for a quick reply, I didn't notice that one. What about InvalidateAll interested in adding this?

[thepirat000]

I'm not sure, I think the name is not clear, it should probably be InvalidateAllTags since the keys not related to a tag will not be removed

[Misiu]

I currently use this:

public static class CacheProviderExtensions
{
    /// <summary>
    /// Removes all the keys related to all tags.
    /// </summary>
    public static void InvalidateAllTags(this ICacheProvider cacheProvider)
    {
        var tags = cacheProvider.GetAllTags().ToArray();
        cacheProvider.InvalidateKeysByTag(tags);
    }
    /// <summary>
    /// Removes all the keys related to all tags.
    /// </summary>
    public static async Task InvalidateAllTagsAsync(this ICacheProvider cacheProvider)
    {
        var tags = cacheProvider.GetAllTags().ToArray();
        await cacheProvider.InvalidateKeysByTagAsync(tags);
    }
}

Can we add them or should they be left as extension methods?

[thepirat000]

I think this should be left as an extension method on your project. The purpose of the Tags is to invalidate a group of keys with a single server call. If you want to remove a group of tags, you should probably have another tag to group the other tag keys and so on...