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Copy pathProcessDefinitionCache.cs
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92 lines (84 loc) · 2.93 KB
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using System;
using System.Linq;
using System.Runtime.Caching;
using System.Threading.Tasks;
namespace BPMNET.Core
{
public class ProcessDefinitionCache<TKey, TProcessDefinition>
where TKey : IEquatable<TKey>
where TProcessDefinition : class, IProcessDefinition<TKey>
{
private MemoryCache cache;
private readonly string prefix = "ProcDef";
private readonly string prefixName = "ProcDefName";
private static CacheItemPolicy policy = new CacheItemPolicy();
private static ProcessDefinitionCache<TKey, TProcessDefinition> instance = null;
private static readonly object padlock = new object();
#region Constructor ...
public static ProcessDefinitionCache<TKey, TProcessDefinition> Instance
{
get
{
if (instance == null)
{
lock (padlock)
{
if (instance == null)
{
instance = new ProcessDefinitionCache<TKey, TProcessDefinition>();
}
}
}
return instance;
}
}
private ProcessDefinitionCache()
{
cache = MemoryCache.Default;
}
#endregion
#region Sub Routine ...
private string getId(TKey id)
{
return prefix + id.ToString();
}
private string getName(string name)
{
return prefixName + name;
}
public virtual TProcessDefinition GetById(TKey id)
{
TProcessDefinition result = cache.Get(getId(id)) as TProcessDefinition;
return result;
}
public virtual TProcessDefinition GetByName(string name)
{
string key = cache.Get(getName(name)) as string;
if (key != null) return cache.Get(key) as TProcessDefinition;
return null;
}
public virtual void Add(TProcessDefinition item)
{
Check.ThrowIfNull(item);
Check.ThrowIfNull(item.DefinitionId);
string key = getId(item.DefinitionId);
cache.Add(key, item, policy);
if (!string.IsNullOrWhiteSpace(item.Name)) cache.Add(getName(item.Name), key, policy);
}
public virtual void Set(TProcessDefinition item)
{
Check.ThrowIfNull(item);
string key = getId(item.DefinitionId);
cache.Set(key, item, policy);
if (!string.IsNullOrWhiteSpace(item.Name)) cache.Set(getName(item.Name), key, policy);
}
public virtual void Remove(TProcessDefinition item)
{
Check.ThrowIfNull(item);
string key = getId(item.DefinitionId);
cache.Remove(key);
if (!string.IsNullOrWhiteSpace(item.Name)) cache.Remove(getName(item.Name));
}
#endregion
}
}