对于Ignite，如何在不覆盖Marshaller的情况下在不同的程序包中使用相同的类? [英] For Ignite, how can I use the same classes in different packages without overriding Marshaller?

问题描述

你好，谢谢！

当应用程序项目具有不同的包(例如"com.eta.one" 和"com.eta.another" )时，我正尝试使用嵌入式Ignite.

I'm tring to use embedded Ignite when app projects have different packages like "com.eta.one" and "com.eta.another".

我使用 new BinaryBasicNameMapper(true)为"com.eta.*" 设置了 BinaryTypeConfiguration .因此，我使用 true 启用了简单的类名解析.我希望这是应该起作用的方式.但这对我不起作用.

I set BinaryTypeConfiguration for "com.eta.*" with new BinaryBasicNameMapper(true). So, I enable simple class name resolution with true. And I was hoping this is how it should work. But it doesn't work for me.

似乎我可以指定自己的Marshaller，但已将其标记为已弃用".在测试Hazelcast(〜类似技术)设置全局序列化程序"时，我已经解决了相同的问题.

It seems like I can specify my own Marshaller, but it's marked as 'deprecated'. I've solved same problem while testing Hazelcast (~ similar technology) setting 'global serializer'.

我在下面两个使用不同软件包的项目中使用代码.

I use code below in two projects in different packages.

String packageWithModels = "com.eta.*";
BinaryTypeConfiguration binaryTypeConfiguration = new BinaryTypeConfiguration()
    .setTypeName(packageWithModels)
    .setIdMapper(new BinaryBasicIdMapper(true))
    .setNameMapper(new BinaryBasicNameMapper(true));
BinaryConfiguration binaryConfiguration = new BinaryConfiguration()
    .setTypeConfigurations(Collections.singleton(binaryTypeConfiguration));
IgniteConfiguration cfg = new IgniteConfiguration()
    .setBinaryConfiguration(binaryConfiguration);

Ignite ignite = Ignition.start(cfg);

IgniteCache<Integer, MyObject> cache = ignite.getOrCreateCache("myCacheMyObject");
MyObject myObject = new MyObject();
myObject.setText("Hello World!");

MyObject before = cache.get(1);
System.out.println("before:" + before);
cache.put(1, myObject);
MyObject after = cache.get(1);
System.out.println("after:" + after);

问题:

• 有没有办法在不同的程序包中使用相同的类?
• 想知道这些类是否可以包含不同的字段集吗?在一个不同的顺序?
• 如果我可以避免手动操作，那也很好注册所有类型.而且使用已弃用的 Marshaler 更改功能.

我试图按照@alamar的建议使用全局映射器.因此，更改了 BinaryConfiguration 并删除了 BinaryTypeConfiguration :

I tried to use the global mapper as the @alamar suggested. So, BinaryConfiguration changed and BinaryTypeConfiguration removed:

BinaryConfiguration binaryConfiguration = new BinaryConfiguration()
                .setIdMapper(new BinaryBasicIdMapper(true))
                .setNameMapper(new BinaryBasicNameMapper(true));

但是情况没有改变.随后启动 com.eta.another 项目时，仍然显示错误 java.lang.ClassNotFoundException:com.eta.one.MyObject .如果这不适用于Java，真是很奇怪，尽管我不知道哪里可能出错.

But the situation didn't change. Still showing error java.lang.ClassNotFoundException: com.eta.one.MyObject when com.eta.another project is subsequently launched. Really strange if this doesn't work specifically for java, although I don't understand where I could have gone wrong.

推荐答案

BinaryBasicNameMapper 应该可以工作-.Net插件可以使用它.我认为您不能在类型名称中使用通配符，因此没有"com.eta.*" 可供您使用.您仍然可以全局设置此映射器.

BinaryBasicNameMapper should work - it's used by .Net plugin which works. I don't think that you can use wildcards in type name, so no "com.eta.*" for you. You can still set this mapper globally.

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