我正在尝试在Geode中实现一个非常简单的PDX自动序列化。我使用零参数构造函数创建了自己的域类：
public class TestPdx
{
public string Test1 { get; set; }
public string Test2 { get; set; }
public string Test3 { get; set; }
public TestPdx() { }
}
现在我希望这个类自动序列化。我使用以下cache. xml启动服务器缓存，尝试在其中为autoPDX注册此类型：
<?xml version="1.0" encoding="UTF-8"?>
<cache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://geode.apache.org/schema/cache"
xsi:schemaLocation="http://geode.apache.org/schema/cache
http://geode.apache.org/schema/cache/cache-1.0.xsd"
version="1.0">
<cache-server/>
<pdx>
<pdx-serializer>
<class-name>org.apache.geode.pdx.ReflectionBasedAutoSerializer</class-name>
<parameter name="classes"><string>TestPdx</string></parameter>
</pdx-serializer>
</pdx>
<region name="webclient" refid="REPLICATE_PERSISTENT"/>
</cache>
然后运行以下代码：
static void Main(string[] args)
{
// 1. cache
CacheFactory cacheFactory = CacheFactory.CreateCacheFactory();
Cache cache = cacheFactory
.SetSubscriptionEnabled(true)
.SetPdxReadSerialized(true)
.Create();
Serializable.RegisterPdxSerializer(new ReflectionBasedAutoSerializer());
RegionFactory regionFactory = cache.CreateRegionFactory(RegionShortcut.CACHING_PROXY);
IRegion<string, TestPdx> region = regionFactory.Create<string, TestPdx>("webclient");
// 3. TestPx object
TestPdx t = new TestPdx();
t.Test1 = "test1";
t.Test2 = "test2";
t.Test3 = "test3";
region["1"] = t;
// 4. Get the entries
TestPdx result1 = region["1"];
// 5. Print result
Console.WriteLine(result1.Test1);
Console.WriteLine(result1.Test2);
Console.WriteLine(result1.Test3);
}
此代码在区域["1"]=t行崩溃；出错
GFCLI_EXCEPTION:System.Runtime.InteropServices.SEHException (0x80004005): External component has thrown an exception.
at apache.geode.client.SerializationRegistry.GetPDXIdForType(SByte* , SharedPtr<apache::geode::client::Serializable>* )
所以我没有正确注册PDX类型。你是如何用本地客户端做到这一点的？
谢谢
这里的答案是在TestPdx中实现IPdxSerializable，如下所示：
public class TestPdx : IPdxSerializable
{
public string Test1 { get; set; }
public string Test2 { get; set; }
public string Test3 { get; set; }
public int Pid { get; set; }
public void ToData(IPdxWriter writer)
{
writer.WriteString("Test1", Test1);
writer.WriteString("Test2", Test2);
writer.WriteString("Test3", Test3);
writer.WriteInt("Pid", Pid);
writer.MarkIdentityField("Pid");
}
public void FromData(IPdxReader reader)
{
Test1 = reader.readString("Test1");
Test2 = reader.readString("Test2");
Test3 = reader.readString("Test3");
Pid = reader.readInt("Pid");
}
public static IPdxSerializable CreateDeserializable()
{
return new TestPdx();
}
public TestPdx() { }
}
然后在Geode中注册Pdx类型，并使用类型为object或类型为TestPdx的区域，如下所示：
Serializable.RegisterPdxType(TestPdx.CreateDeserializable);
IRegion<string, Object> t = regionFactory.Create<string, Object>("test");
并将TestPdx简单地写入该区域：
TestPdx value = new TestPdx();
value.Test1 = "hello";
value.Test2 = "world";
value.Test3 = "again";
t[key] = value;
Geode区域中会有一个PdxInstance，因此您可以在其上运行OQL查询等。
