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Show / Hide Table of Contents
  • Programmer's Guide
  • Client Side API Programming
    • Setting Up Development Environment
    • Basic Cache Operations
      • Initialize Cache
      • Add Data to Cache
      • Update Data in Cache
      • Fetch Data From Cache
      • Remove Data From Cache
      • Dispose Cache
    • Bulk Operations
      • Adding Collection to Cache
      • Updating Collection in Cache
      • Retrieving Collection from Cache
      • Removing Collection from Cache
      • Deleting Collection from Cache
    • Asynchronous Operations
      • Using Asynchronous Operations
      • Using Asynchronous Operations with Callback Methods
    • Groups and Subgroups
      • Adding/Updating Data Group in Cache
      • Retrieving Data Group from Cache
      • Removing Data Group from Cache
    • Tagging Data in NCache
      • Creating Tags
      • Adding Items with Tags
      • Retrieving Previously Tagged Data
      • Removing Tagged Items from Cache
    • Named Tags
    • Data Expiration Strategies
      • Using Absolute Expiration
      • Using Sliding Expiration
    • Cache Dependencies
      • Key Dependency
      • File Dependency
      • Notification based Dependencies
        • Database Dependency using SQL Server
        • Database Dependency using Oracle
      • Polling Based Dependency
      • Custom Data Source Dependency
      • Multiple Cache Sync Dependency
      • Aggregate Dependency
      • Add Dependency to Existing Item
      • Using CLR Procedures to Call NCache
    • Locking Data in NCache
      • Locking Items in Cache (Pessimistic Locking)
      • Locking Items with Cache Item Versioning (Optimistic Locking)
    • SQL Reference for NCache
      • SQL Syntax
      • Querying Samples for Operators
      • Querying Data in NCache
      • NCache Language Integrated Query (LINQ)
        • Using LINQ in NCache
        • Configuring LINQPad for NCache
        • Querying NCache Data in LINQPad
    • Event Notifications
      • Cache Level Event Notifications
      • Item Level Event Notifications
      • Custom Event Notifications
    • Publish/Subscribe (Pub/Sub) in NCache
      • Pub/Sub Topics
      • Managing Topics
      • Pub/Sub Messages
        • Message Behavior and Properties
        • Creating a Message
      • Publish Messages to Topic
      • Subscribe for Topic Messages
      • Monitoring Pub/Sub Topics
    • Continuous Query
    • Using Streams in NCache
      • Opening with Stream Modes
      • Adding and Updating Data with Streams
      • Retrieving Data from Streams
      • Closing a Stream
    • Security and Encryption
      • NCache Security
      • NCache Data Encryption
    • Data Compression
    • NCache Management API
  • Server Side API Programming
    • Cache Startup Loader
      • Components of Cache Startup Loader
      • Sample Implementation of ICacheLoader on Single Node
      • Sample Implementation of ICacheLoader with Distribution Hints
    • Data Source Providers (Backing Source)
      • Read-Through Caching
        • Configure Read-Through Provider
        • Using Read-Through with Cache Operations
      • Write-Through Caching
        • Configuring Write-Through Provider
        • Using Write-Through with Basic Operations
        • Using Write-Behind with Basic Operations
        • Using Write-Behind with Bulk Operations
        • Using Write-Behind with Async Operations
        • Monitor Write-Through Counters
    • Custom Dependency
      • Sample Implementation of Custom Dependency
      • Sample Usage of Custom Dependency
    • WAN Replication through Bridge
      • Bridge Configurations
      • Implementing Bridge Conflict Resolver
    • Entry Processor
      • Sample Implementation of IEntryProcessor Interface
      • Sample Usage of EntryProcessor
    • MapReduce
      • Sample Implementation of MapReduce Interfaces
      • Sample Usage of MapReduce
    • Aggregator
      • Sample Implementation of IValueExtractor Interface
      • Sample Implementation of IAggregator Interface
      • Sample Usage of Aggregator
    • Dynamic Compact Serialization
  • Client Side ASP.NET Features
    • ASP.NET
      • ASP.NET Session State Provider for NCache
      • Multi-Region ASP.NET Session State Provider for NCache
    • ASP.NET Core
      • Session Storage in ASP.NET Core
        • Configure NCache ASP.NET Core Session Provider
        • Configure ASP.NET Core Sessions with NCache IDistributedCache Provider
      • Multi-Region ASP.NET Core Session Provider for NCache
      • Object Caching in ASP.NET Core
    • ASP.NET SignalR
      • Using NCache Extension for SignalR
    • View State Caching
      • Configuring and Using Content Optimization
      • Group View State with Sessions
      • Limit View State Caching
      • Perform Page Level Grouping for View State
    • ASP.NET Output Cache
      • Configure ASP.NET Output Caching
      • Using ASP.NET Output Cache with Custom Hooks
  • Client Side Third Party Integrations
    • Migrating AppFabric to NCache
      • AppFabric API vs. NCache API
    • NHibernate
      • NCache as NHibernate Second Level Cache
      • Using NHibernate Query Caching
      • Configuring Database Synchronization with NHibernate
    • Entity Framework Caching Integration
      • NCache as Entity Framework Second Level Cache
      • Entity Framework Caching Config File
    • Entity Framework Core Caching
      • Installing NCache Entity Framework Core Provider
      • Configuring NCache Entity Framework Core Provider
      • Using NCache Entity Framework Core Provider
        • Caching Options for EF Core Provider
        • LINQ APIs for EF Core Provider
        • Cache Only APIs for EF Core Provider
        • Query Deferred APIs for EF Core Provider
      • Logging in NCache Entity Framework Core Provider
    • Memcached
      • NCache Memcached Gateway Approach
      • Memcached Client Plugin for .NET
    • Debug NCache Providers in Visual Studio
    • NCache for Visual Studio Extension

Caching Options for EF Core Caching Provider

Using EF Core Caching Provider allows you to use some integral caching features provided by NCache. These caching options are encapsulated in the CachingOptions class provided by the EF Core Caching Provider itself. These caching options are used to populate the cache item before inserting it into cache. The CachingOptions class contains the following methods and properties:

To utilize the CachingOptions API, include the following namespaces in your application:

  • Alachisoft.NCache.EntityFrameworkCore
  • Alachisoft.NCache.Runtime.Caching
Method Description
SetAbsoluteExpiration Specifies DateTime interval for Absolute Expiration. This sets the value for the read-only AbsoluteExpirationTime property.
SetSlidingExpirationTime Specifies TimeSpan interval for Sliding Expiration. This sets the value for the read-only SlidingExpirationTime property.

Property Description DefaultValue
AbsoluteExpirationTime Specifies time interval for Absolute Expiration. Can be set using the SetAbsoluteExpiration method. DefaultAbsolute
SlidingExpirationTime Specifies time interval for Sliding Expiration. Can be set using the SetSlidingExpiration method. DefaultSliding
ExpirationType Read-only enum to specify which expiration type has been configured for the cache item. The enum value is updated when expiration type is set using either SetAbsoluteExpiration() or SetSlidingExpiration(). The values for this enum are:
  • Absolute = 0
  • Sliding =1
  • Absolute
    QueryIdentifier Identifier for a query which is added as a Tag against the result set of the query in the cache. This MUST be unique for each unique query. QueryIdentifier is used to regenerate the result set from the cache upon execution of the same query again. The user must maintain a mapping of the query against the query identifier to be used in the future. If not specified, NCache adds the query string itself as the tag (making it unique for each unique query). For example, a query which returns a Customer is not tagged by the user. The next time the same query is executed, the query string is searched as a tag within the cache and if it exists, the result set against it will be returned. null
    StoreAs Enum that specifies how the entities should be added to the cache.
  • SeperateEntities = 0
    Items are added as separate entities.
  • Collection = 1
    Items are added as a List of entity type, for example, List<Customer>. Queries stored as collection do not share their data. As a result, overlapping entities will be stored again in cache when they are made part of another query.
  • Collection
    Priority Enum to specify the priority level for eviction of each cache item.
  • Low
  • BelowNormal
  • Normal
  • AboveNormal
  • High
  • Default
  • NotRemovable
  • Default
    CreateDbDependency Specifies whether a database dependency should be created for the cache item or not. If specified, the database type is specified through NCacheConfiguration.Configure() in the DbContext. false

    Example

    The following sample shows how caches can be configured according to the aforementioned parameters:

    CachingOptions options = new CachingOptions
    {
        QueryIdentifier = new Tag("CustomerEntity"),
        CreateDbDependency = true,
        StoreAs = StoreAs.SeperateEntities,
        Priority = Runtime.CacheItemPriority.High
    };
    
    options.SetAbsoluteExpiration(new DateTime(2017, 6, 10));
    

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