76 lines
2.3 KiB
C#
76 lines
2.3 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using Microsoft.Practices.Unity.InterceptionExtension;
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using System.Transactions;
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using System.Reflection;
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using System.Web;
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using MyCode.Project.Infrastructure.Cache;
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using Microsoft.Practices.Unity;
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using Newtonsoft.Json;
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using MyCode.Project.Infrastructure.Common;
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namespace MyCode.Project.Infrastructure.UnityExtensions
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{
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public class CachingCallHandler : ICallHandler
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{
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public TimeSpan ExpirationTime {
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get;set;
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}
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#region GetCacheKey(得到缓存key)
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private string GetCacheKey(MethodInfo method, IMethodInvocation input)
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{
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StringBuilder sb = new StringBuilder();
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sb.AppendFormat("{0}:", method.DeclaringType.FullName);
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sb.AppendFormat("{0}:", method.Name);
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if (input.Arguments != null && input.Arguments.Count > 0)
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{
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for (int i = 0; i < input.Arguments.Count; i++)
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{
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sb.Append(JsonHelper.ToJson(input.Arguments[i]));
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}
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}
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return sb.ToString();
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}
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#endregion
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#region Invoke(执行)
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public IMethodReturn Invoke(IMethodInvocation input, GetNextHandlerDelegate getNext)
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{
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MethodInfo targetMethod = (MethodInfo)input.MethodBase;
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if (targetMethod.ReturnType == typeof(void))
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{
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return getNext()(input, getNext);
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}
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var Cache = new SystemCache();
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string CacheKey = GetCacheKey(targetMethod,input);
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object cacheResult = Cache.Get(CacheKey) ;
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if (null == cacheResult)
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{
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IMethodReturn realReturn = getNext()(input, getNext);
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if (null == realReturn.Exception) {
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Cache.Set(CacheKey, realReturn.ReturnValue, this.ExpirationTime);
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}
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return realReturn;
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}
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return input.CreateMethodReturn(cacheResult,input.Arguments);
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}
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#endregion
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public CachingCallHandler(TimeSpan expirationtime)
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{
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this.ExpirationTime = expirationtime;
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}
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public int Order { get; set; }
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}
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}
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