scala jrebel 超类更改
我将 JRebel 与 Scala 一起使用，并且经常遇到需要重新启动服务器的情况，因为如果超类发生更改，JRebel 无法加载类。这主要是在我更改匿名函数时完成的，因为我可以从 JRebel 错误描述中推断出：Class 'mypackage.NewBook$$anonfun$2' 超类已从 'scala.runtime.AbstractFunction1' 更改为 'scala.runtime.AbstractFunction1' 。 Runtime.AbstractFunction2'并且无法重新加载。
有什么办法，我如何设计我的代码来避免这种情况？ scala 编译器是否会获取这些函数，并按照它们在源代码中出现的方式对它们进行编号？
I'm using JRebel with Scala and I'm quite frequently experiencing the need for restart of server due to the fact that JRebel is unable to load a class if the superclass was changed. This is done mainly when I change anonymous functions as I can deduce from the JRebel error desription:Class 'mypackage.NewBook$$anonfun$2' superclass was changed from 'scala.runtime.AbstractFunction1' to 'scala.runtime.AbstractFunction2' and could not be reloaded.
Is there any way, how can I design my code to avoid this? Does scala compiler take the functions, numbers them from one as they appear in source code?
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正在变化的数字是指函数参数的数量。
AbstractFunction1是一个单参数函数，而AbstractFunction2是一个双参数函数。解决这个问题的一种方法是柯里化或元组你的函数，以便它们始终是单参数函数。是的，匿名函数会按照您的建议自动命名。如果在现有匿名单参数函数之前插入新的匿名双参数函数，则看起来好像原始函数的类型已更改。
The numbers that are changing refer to the number of function arguments. An
AbstractFunction1is a one-argument function, whileAbstractFunction2is a two-argument function. One way to work around this would be to curry or tuple your functions so that they're always one-argument functions.And, yes, anonymous functions are automatically named as you suggested. If you insert a new anonymous two-arg function before an existing anonymous one-arg function, it will appear as if the type of the original function changed.