SP 2013 - SPCache类。这个怎么运作？ [英] SP 2013 - SPCache Class. How it works?

问题描述

我需要有关spcache类内部工作原理的信息，而不是如何实现它。

https://msdn.microsoft.com/en-us/library/microsoft.office.server.objectcache.spcache.aspx?f=255&MSPPError=-2147217396

<我无法找到解释服务器如何管理和存储使用spcache创建的对象的技术文章，所以我对这个主题有疑问：

• 它是在前端服务器之间共享的吗？
• 它在农场范围内？
• 它是附加到特定数据库还是AppFabric？

任何建议都将不胜感激。

Andrea。

解决方案

嗨Andrea，

这不是Farm Wide。本质上，它是使用它的服务器内存中的线程安全字典。检查下面的主题。

https： //sharepoint.stackexchange.com/questions/10778/is-spcache-a-farm-wide-cache

如何使用SPCache的示例。

 //用于缓存的对象
公共类TestClass 
 {
 public string someData {get;组; } 
 public TestClass（s​​tring myData）
 {
 this.someData = myData; 
} 
} 

 // SPCache对象设置缓存参数
公共类MyCache 
 {
 public static SPCacheConfig cacheConfig = new SPCacheConfig（）; 
内部静态CacheParameter [] CacheParameters = new CacheParameter [] 
 {
 // DataCache 
新CacheParameter（ServiceName，
 DataCache，
 0xfffff，
 PriorityType.High，
 new TimeSpan（0,60,0））
}; 
 internal const string ServiceName =" CacheAppStressTest" ;; 
内部const字符串DataCache =" CacheAppStressTest.Data" ;; 
} 

创建Web部件并添加以下代码。

 public class CustomCache：WebPart 
 {
 Label lblMessage; 
 Label lblCacheData; 
 public CustomCache（）
 {
 this.lblMessage = new Label（）; 
 this.lblMessage.ID =" lblMessage" ;; 
 this.lblCacheData = new Label（）; 
 this.lblCacheData.ID =" lblCacheData" ;; 
} 
 protected override void CreateChildControls（）
 {
 try 
 {
 byte priority = 0; 
 
 MyCache.CacheParameters [0] .lifetime = new TimeSpan（0,1,0）; //设置参数
的生命周期MyCache.CacheParameters [0] .priority =（PriorityType）priority; //设置参数优先级
 MyCache.cacheConfig.AddCaches（MyCache.CacheParameters）; 
 SPCache.Cache.Put（MyCache.DataCache，new SPCachedObject（" Test"，new TestClass（" some data"），new TimeSpan（1,0,0）））; //将缓存对象添加到SPCache Collection 
 TestClass newClass =（TestClass）SPCache.Cache.Get（MyCache.DataCache，" Test"）; 
 if（newClass！= null）
 {
 this.lblCacheData.Text ="< br />< b>" + newClass.someData +"< / b>" ;; 
} 
其他
 {
 this.lblCacheData.Text ="< br />< b>空数据< / b>" ;; 
} 
 //删除缓存对象
 SPCache.Cache.Delete（MyCache.DataCache，" Test"）; 
 //显示缓存数据
 this.lblMessage.Text = string.Format（" CacheHits = {0} \r\\\
Reads = {1} \\\
Count = {2} \\ nSizeBytes = {3} \\\
HitRatio = {4}"，
 SPCache.Cache.TotalCacheHits，SPCache.Cache.TotalReadAttempts，SPCache.Cache.Count，SPCache.Cache.UsedBytes ，SPCache.Cache.HitRatio）; 
 MyCache.cacheConfig.RemoveCaches（MyCache.CacheParameters）; 
} 
 catch（Exception ex）
 {
 this.lblMessage.Text = ex.Message; 
} 
 this.Controls.Add（this.lblMessage）; 
 this.Controls.Add（this.lblCacheData）; 
} 
} 
 

最好的问候，

Dennis

Hi,

I need information on how the spcache class internally works, not how to implement it.

https://msdn.microsoft.com/en-us/library/microsoft.office.server.objectcache.spcache.aspx?f=255&MSPPError=-2147217396

I'm unable to find a technical article that explain how the server manage and store objects created with spcache, so I have doubt regarding this topics:

• It's shared between Front-End Servers?
• It's farm wide?
• It's attached to specific database or to AppFabric?

Any suggestions would be greatly appreciated.

Andrea.

解决方案

Hi Andrea,

It's not Farm Wide. Essentially it is a thread-safe Dictionary in memory of the server that uses it. Check the thread below.

https://sharepoint.stackexchange.com/questions/10778/is-spcache-a-farm-wide-cache

Example for how to use SPCache.

//Object for Cacheing
public class TestClass
{
	public string someData { get; set; }
	public TestClass(string myData)
	{
		this.someData = myData;
	}
}

// SPCache Object Settings Cache Parameters
public class MyCache
{
	public static SPCacheConfig cacheConfig = new SPCacheConfig();
	internal static CacheParameter[] CacheParameters = new CacheParameter[]
	{
		// DataCache
		new CacheParameter(ServiceName,
									  DataCache,
									  0xfffff,
									  PriorityType.High, 
									  new TimeSpan(0,60,0))
	};
	internal const string ServiceName = "CacheAppStressTest";
	internal const string DataCache = "CacheAppStressTest.Data";
}

Create Web part and add following code.

public class CustomCache : WebPart
{
	Label lblMessage;
	Label lblCacheData;
	public CustomCache()
	{
		this.lblMessage = new Label();
		this.lblMessage.ID = "lblMessage";
		this.lblCacheData = new Label();
		this.lblCacheData.ID = "lblCacheData";
	}
	protected override void CreateChildControls()
	{
		try
		{
			byte priority = 0;               

			MyCache.CacheParameters[0].lifetime = new TimeSpan(0, 1, 0); //Set life time of parameter
			MyCache.CacheParameters[0].priority = (PriorityType)priority; // Set priority of paramater
			MyCache.cacheConfig.AddCaches(MyCache.CacheParameters);
			SPCache.Cache.Put(MyCache.DataCache, new SPCachedObject("Test", new TestClass("some data"), new TimeSpan(1, 0, 0)));// Add cache object into SPCache Collection
			TestClass newClass = (TestClass)SPCache.Cache.Get(MyCache.DataCache, "Test");
			if (newClass != null)
			{
				this.lblCacheData.Text = "<br /><b>" + newClass.someData + "</b>";
			}
			else
			{
				this.lblCacheData.Text = "<br /><b> Null data</b>";
			}
			// Remove cache object
			SPCache.Cache.Delete(MyCache.DataCache, "Test");
			//Display Cache data
			this.lblMessage.Text = string.Format("CacheHits={0}\r\nReads={1}\r\nCount={2}\r\nSizeBytes={3}\r\nHitRatio={4}",
			SPCache.Cache.TotalCacheHits, SPCache.Cache.TotalReadAttempts, SPCache.Cache.Count, SPCache.Cache.UsedBytes, SPCache.Cache.HitRatio);
			MyCache.cacheConfig.RemoveCaches(MyCache.CacheParameters);
		}
		catch (Exception ex)
		{
			this.lblMessage.Text = ex.Message;
		}
		this.Controls.Add(this.lblMessage);
		this.Controls.Add(this.lblCacheData);
	}
}

Best Regards,

Dennis

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