public void CASTest()
{
using (MemcachedClient client = GetClient())
{
// store the item
var r1 = client.Store(StoreMode.Set, "CasItem1", "foo");
Assert.IsTrue(r1, "Initial set failed.");
// get back the item and check the cas value (it should match the cas from the set)
var r2 = client.GetWithCas <string>("CasItem1");
Assert.AreEqual(r2.Result, "foo", "Invalid data returned; expected 'foo'.");
Assert.AreNotEqual(0, r2.Cas, "No cas value was returned.");
var r3 = client.Cas(StoreMode.Set, "CasItem1", "bar", r2.Cas - 1);
Assert.IsFalse(r3.Result, "foo", "Overwriting with 'bar' should have failed.");
var r4 = client.Cas(StoreMode.Set, "CasItem1", "baz", r2.Cas);
Assert.IsTrue(r4.Result, "foo", "Overwriting with 'baz' should have succeeded.");
var r5 = client.GetWithCas <string>("CasItem1");
Assert.AreEqual(r5.Result, "baz", "Invalid data returned; excpected 'baz'.");
}
}
public void CASTest()
{
using (MemcachedClient client = GetClient())
{
// store the item
var r1 = client.Store(StoreMode.Set, "CasItem1", "foo");
Assert.True(r1, "Initial set failed.");
// get back the item and check the cas value (it should match the cas from the set)
var r2 = client.GetWithCas <string>("CasItem1");
Assert.Equal("foo", r2.Result);
Assert.NotEqual((ulong)0, r2.Cas);
var r3 = client.Cas(StoreMode.Set, "CasItem1", "bar", r2.Cas - 1);
Assert.False(r3.Result, "Overwriting with 'bar' should have failed.");
var r4 = client.Cas(StoreMode.Set, "CasItem1", "baz", r2.Cas);
Assert.True(r4.Result, "Overwriting with 'baz' should have succeeded.");
var r5 = client.GetWithCas <string>("CasItem1");
Assert.Equal("baz", r5.Result);
}
}
public object Get(string key, out ulong ucas)
{
var result = _client.GetWithCas <MemcachedValueWrapper>(key);
if (result.Result != null)
{
ucas = result.Cas;
return(result.Result);
}
ucas = default(ulong);
return(null);
}
static void Main(string[] args)
{
MemcachedClientConfiguration mcConfig = new MemcachedClientConfiguration();
mcConfig.AddServer("127.0.0.1:11211");//必须指定端口
using (MemcachedClient client = new MemcachedClient(mcConfig))
{
//client.Store(Enyim.Caching.Memcached.StoreMode.Set, "name", "yzk");
//string name=(string) client.Get("name");
//client.Store(Enyim.Caching.Memcached.StoreMode.Set, "p1", new Person { Name="dalong",Age=18});
//Person person=(Person) client.Get("p1");
//Console.WriteLine(person.Name+","+person.Age);
var cas = client.GetWithCas("name");
Console.WriteLine("按任意键继续");
Console.ReadKey();
var res = client.Cas(Enyim.Caching.Memcached.StoreMode.Set, "name", cas.Result + "1",
cas.Cas);
if (res.Result)
{
Console.WriteLine("修改成功" + cas.Result);
}
else
{
Console.WriteLine("被别人改了" + cas.Result);
}
}
Console.ReadKey();
}
private ErrorTypes GetFromMCWithCas(string sKey, out TaskResultData oTast, out ulong cas)
{
ErrorTypes oError = ErrorTypes.NoError;
oTast = null;
cas = 0;
try
{
using (MemcachedClient oMc = new MemcachedClient(m_oMcConfig))
{
CasResult <string> oGetData = oMc.GetWithCas <string>(sKey);
if (oGetData.Result != null)
{
cas = oGetData.Cas;
XmlSerializer oXmlSerializer = new XmlSerializer(typeof(TaskResultData));
using (StringReader oStringReader = new StringReader(oGetData.Result))
{
oTast = (TaskResultData)oXmlSerializer.Deserialize(oStringReader);
}
}
}
}
catch
{
oError = ErrorTypes.TaskResult;
}
return(oError);
}
//Cas操作
//Cas 类似数据库的乐观锁，但是我们使用Memcached一般只是用来缓存数据，一般是不需要使用Cas的
public static void TestCas()
{
MemcachedClientConfiguration memConfig = new MemcachedClientConfiguration();
memConfig.AddServer("127.0.0.1:11211");
using (MemcachedClient memClient = new MemcachedClient(memConfig))
{
memClient.Store(Enyim.Caching.Memcached.StoreMode.Set, "Name", "shanzm");
CasResult <string> nameWithCas = memClient.GetWithCas <string>("Name");
Console.WriteLine($"读取的数据Name={nameWithCas.Result },Cas：{nameWithCas.Cas }"); //第一个运行的程序此时的Cas=1
Console.WriteLine("你此时在源文件中点击运行，“003Cas操作.exe”，抢先运行,点击回车进行下面的修改"); //另外的程序读取Name的Cas=2
Console.ReadKey();
CasResult <bool> updateWithCas = memClient.Cas(StoreMode.Set, "Name", "shanzm修改版本", nameWithCas.Cas);
if (updateWithCas.Result)
{
Console.WriteLine("Name修改成功,现在的Cas：" + updateWithCas.Cas);//另外的程序此处的Cas为3
}
else
{
Console.WriteLine("更新失败,被其他程序抢先了，现在的Cas：" + updateWithCas.Cas);//第一个运行的程序的Cas此时为0
}
Console.ReadKey();
}
}
//test GetWithCas
public void GetWithCasTest()
{
MemcachedClient client = GetClient();
var r1 = client.Store(StoreMode.Set, "GetWithCasTest", "Done");
var r2 = client.GetWithCas <string>("GetWithCasTest");
HandleLogs("[Cmd=GetWithCas]CasResult：" + r2.StatusCode);
}
static void Main(string[] args)
{
Person p = new Person();
MemcachedClientConfiguration mcConfig = new MemcachedClientConfiguration();
mcConfig.AddServer("127.0.0.1:11211");//必须指定端口
using (MemcachedClient client = new MemcachedClient(mcConfig))
{
var cas = client.GetWithCas("Name");
Console.WriteLine("按任意键继续");
Console.ReadKey();
var res = client.Cas(Enyim.Caching.Memcached.StoreMode.Set, "Name", cas.Result + "1", cas.Cas);
if (res.Result)
{
Console.WriteLine("修改成功");
}
else
{
Console.WriteLine("被别人改了");
}
}
Console.ReadKey();
}
public void AppendCASTest()
{
using (MemcachedClient client = GetClient())
{
// store the item
var r1 = client.Cas(StoreMode.Set, "CasAppend", "foo");
Assert.IsTrue(r1.Result, "Initial set failed.");
Assert.AreNotEqual(r1.Cas, 0, "No cas value was returned.");
var r2 = client.Append("CasAppend", r1.Cas, new System.ArraySegment <byte>(new byte[] { (byte)'l' }));
Assert.IsTrue(r2.Result, "Append should have succeeded.");
// get back the item and check the cas value (it should match the cas from the set)
var r3 = client.GetWithCas <string>("CasAppend");
Assert.AreEqual(r3.Result, "fool", "Invalid data returned; expected 'fool'.");
Assert.AreEqual(r2.Cas, r3.Cas, "Cas values r2:r3 do not match.");
var r4 = client.Append("CasAppend", r1.Cas, new System.ArraySegment <byte>(new byte[] { (byte)'l' }));
Assert.IsFalse(r4.Result, "Append with invalid CAS should have failed.");
}
}
public void AppendCASTest()
{
using (MemcachedClient client = GetClient())
{
// store the item
var r1 = client.Cas(StoreMode.Set, "CasAppend", "foo");
Assert.True(r1.Result, "Initial set failed.");
Assert.NotEqual(r1.Cas, (ulong)0);
var r2 = client.Append("CasAppend", r1.Cas, new System.ArraySegment <byte>(new byte[] { (byte)'l' }));
Assert.True(r2.Result, "Append should have succeeded.");
// get back the item and check the cas value (it should match the cas from the set)
var r3 = client.GetWithCas <string>("CasAppend");
Assert.Equal(r3.Result, "fool");
Assert.Equal(r2.Cas, r3.Cas);
var r4 = client.Append("CasAppend", r1.Cas, new System.ArraySegment <byte>(new byte[] { (byte)'l' }));
Assert.False(r4.Result, "Append with invalid CAS should have failed.");
}
}
private ErrorTypes GetFromMCWithCas(string sKey, out TaskResultData oTast, out ulong cas)
{
ErrorTypes oError = ErrorTypes.NoError;
oTast = null;
cas = 0;
try
{
using (MemcachedClient oMc = new MemcachedClient(m_oMcConfig))
{
CasResult<string> oGetData = oMc.GetWithCas<string>(sKey);
if (oGetData.Result != null)
{
cas = oGetData.Cas;
XmlSerializer oXmlSerializer = new XmlSerializer(typeof(TaskResultData));
using (StringReader oStringReader = new StringReader(oGetData.Result))
{
oTast = (TaskResultData)oXmlSerializer.Deserialize(oStringReader);
}
}
}
}
catch
{
oError = ErrorTypes.TaskResult;
}
return oError;
}
public static CasResult <object> GetWithCas(string key)
{
return(client.GetWithCas(key));
}
public object Get(string key)
{
return(_client.GetWithCas(key).Result);
}
public void Cas_Study()
{
using (var client = new MemcachedClient())
{
/*
* 非常重要的CAS操作
*/
client.Store(StoreMode.Set, "userid", "123456");
var result1 = client.GetWithCas("userid");
var result2 = client.Cas(StoreMode.Set, "userid", "6543321");
Assert.True(result2.Result);
var result3 = client.Cas(StoreMode.Set, "userid", "123456", result1.Cas);
Assert.False(result3.Result);
client.FlushAll();
}
}
public void Gets_Study()
{
using (var client = new MemcachedClient())
{
/*
* 非常重要的CAS操作
*/
client.Store(StoreMode.Set, "userid", "123456");
var result = client.GetWithCas("userid");
Assert.AreEqual("123456", result.Result);
Assert.Greater(result.Cas, 0u);
client.FlushAll();
}
}
