Java实现CORBA静态绑定(二)

本文主要内容涉及:

  • CORBA基本架构
  • IDL文件编写
  • POA示例实现
  • POA+TIE示例实现
  • ImplBase示例实现
  • ImplBase+TIE示例实现
  • Persistent示例实现

要写一个静态绑定的CORBA程序,首先要完成的就是定义接口。CORBA采用的接口描述方式为IDL(Interface Description Language),IDL的语法规则类似于CPP,所以Java的类型需要做类型映射。常见类型映射关系如下:

IDL Type Java Type
module package
boolean boolean
char, wchar char
octet byte
string, wstring java.lang.String
short, unsigned short short
long, unsigned long int
long long, unsigned long long long
float float
double double
fixed java.math.BigDecimal
enum, struct, union class
sequence, array array
interface (non-abstract) signature interface and an operations interface, helper class, holder class
interface (abstract) signature interface, helper class, holder class
constant (not within an interface) public interface
constant (within an interface) fields in the Java signature interface for non-abstract, or the sole Java interface for abstract
exception class
Any org.omg.CORBA.Any
type declarations nested within interfaces “scoped” package
typedef helper classes
pseudo objects pseudo interface
readonly attribute accessor method
readwrite attribute accessor and modifer methods
operation method

现在,写一个很简单的IDL文件:
hi.idl

module HiCorba
{
	interface Hi
	{
		string sayHiTo(in string someone);
		long add(in long numa, in long numb);
		oneway void shutdown();
	};
};

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