如何配置TAO corba服务器以使从object_to_string生成的此服务器的IOR字符串是常量？
每次从object_to_string生成的IOR字符串在服务器重新启动后都会更改。这很不方便，因为客户端必须通过重新加载IOR文件或命名服务访问来更新其缓存的服务器IOR字符串。因此，无论重启多少次，服务器都可以生成一个常量IOR字符串，这将非常有用。
我的corba服务器基于ACE + TAO，我确实记得TAO支持常量IOR字符串：每次生成的IOR字符串都相同，解决方案是为服务器添加一些配置。但我现在不记得这些配置了。
============================================= 更新：
在ACE_wrappers / TAO / tests / POA / Persistent_ID / server.cpp中，我添加了一个名为testUniqe（）的新函数，它与creatPOA方法类似。更新文件内容为：
void testUniqu(CORBA::ORB_ptr orb_, PortableServer::POA_ptr poa_){
CORBA::PolicyList policies (2);
policies.length (2);
//IOR is the same even it is SYSTEM_ID
policies[0] = poa_->create_id_assignment_policy (PortableServer::USER_ID);
policies[1] = poa_->create_lifespan_policy (PortableServer::PERSISTENT);
PortableServer::POAManager_var poa_manager = poa_->the_POAManager ();
PortableServer::POA_ptr child_poa_ = poa_->create_POA ("childPOA", poa_manager.in (), policies);
// Destroy the policies
for (CORBA::ULong i = 0; i < policies.length (); ++i) {
policies[i]->destroy ();
}
test_i *servant = new test_i (orb_, child_poa_);
PortableServer::ObjectId_var oid = PortableServer::string_to_ObjectId("xushijie");
child_poa_->activate_object_with_id (oid, servant);
PortableServer::ObjectId_var id = poa_->activate_object (servant);
CORBA::Object_var object = poa_->id_to_reference (id.in ());
test_var test = test::_narrow (object.in ());
CORBA::String_var ior = orb_->object_to_string(test.in());
std::cout<<ior.in()<<std::endl;
poa_->the_POAManager()->activate();
orb_->run();
}
int
ACE_TMAIN (int argc, ACE_TCHAR *argv[])
{
try
{
CORBA::ORB_var orb =
CORBA::ORB_init (argc, argv);
int result = parse_args (argc, argv);
CORBA::Object_var obj =
orb->resolve_initial_references ("RootPOA");
PortableServer::POA_var root_poa =
PortableServer::POA::_narrow (obj.in ());
PortableServer::POAManager_var poa_manager =
root_poa->the_POAManager ();
testUniqu(orb.in(), root_poa.in());
orb->destroy ();
}
catch (const CORBA::Exception& ex)
{
ex._tao_print_exception ("Exception caught");
return -1;
}
return 0;
}
问题是一旦重启，输出服务器IOR仍然不同。我还将此代码与第412页（Advance Corba Programming）中的代码进行了比较，但仍然失败..
///////////////////////////////////
更新：
使用“server -ORBListenEndpoints iiop：//：1234＆gt; / tmp / ior1”，生成的两个IOR为：
IOR：010000000d00000049444c3a746573743a312e300000000001000000000000007400000001010200150000007368696a69652d5468696e6b5061642d543431300000d2041b00000014010f0052535453f60054c6f80c000000000001000000010000000002000000000000000800000001000000004f41540100000018000000010000000100010001000000010001050901010000000000 IOR：010000000d00000049444c3a746573743a312e300000000001000000000000007400000001010200150000007368696a69652d5468696e6b5061642d543431300000d2041b00000014010f0052535468f60054da280a000000000001000000010000000002000000000000000800000001000000004f41540100000018000000010000000100010001000000010001050901010000000000
对于ior1和ior2的tao_catior的结果：
ior1:
The Byte Order: Little Endian
The Type Id: "IDL:test:1.0"
Number of Profiles in IOR: 1
Profile number: 1
IIOP Version: 1.2
Host Name: **
Port Number: 1234
Object Key len: 27
Object Key as hex:
14 01 0f 00 52 53 54 53 f6 00 54 c6 f8 0c 00 00
00 00 00 01 00 00 00 01 00 00 00
The Object Key as string:
....RSTS..T................
The component <1> ID is 00 (TAG_ORB_TYPE)
ORB Type: 0x54414f00 (TAO)
The component <2> ID is 11 (TAG_CODE_SETS)
Component length: 24
Component byte order: Little Endian
Native CodeSet for char: Hex - 10001 Description - ISO8859_1
Number of CCS for char 1
Conversion Codesets for char are:
1) Hex - 5010001 Description - UTF-8
Native CodeSet for wchar: Hex - 10109 Description - UTF-16
Number of CCS for wchar 0
ecoding an IOR:
//ior2
The Byte Order: Little Endian
The Type Id: "IDL:test:1.0"
Number of Profiles in IOR: 1
Profile number: 1
IIOP Version: 1.2
Host Name: **
Port Number: 1234
Object Key len: 27
Object Key as hex:
14 01 0f 00 52 53 54 68 f6 00 54 da 28 0a 00 00
00 00 00 01 00 00 00 01 00 00 00
The Object Key as string:
....RSTh..T.(..............
The component <1> ID is 00 (TAG_ORB_TYPE)
ORB Type: 0x54414f00 (TAO)
The component <2> ID is 11 (TAG_CODE_SETS)
Component length: 24
Component byte order: Little Endian
Native CodeSet for char: Hex - 10001 Description - ISO8859_1
Number of CCS for char 1
Conversion Codesets for char are:
1) Hex - 5010001 Description - UTF-8
Native CodeSet for wchar: Hex - 10109 Description - UTF-16
Number of CCS for wchar 0
差异结果是：
< 14 01 0f 00 52 53 54 53 f6 00 54 c6 f8 0c 00 00
---
> 14 01 0f 00 52 53 54 68 f6 00 54 da 28 0a 00 00
19c19
< ....RSTS..T................
---
> ....RSTh..T.(..............
类似的差异结果是：
< 14 01 0f 00 52 53 54 62 fd 00 54 2c 9a 0e 00 00
---
> 14 01 0f 00 52 53 54 02 fd 00 54 f9 a9 09 00 00
19c19
< ....RSTb..T,...............
---
> ....RST...T................
不同之处在于ObjectKey。
============================================
更新：
我没有使用上面的代码，而是找到了一个更好的解决方案，使用了助手TAO_ORB_Manager，它使用了NamingService和TAO / examples / Simple。 TAO_ORB_Manager封装API并生成持久性IOR，作为Simple.cpp中的示例代码：
if (this->orb_manager_.init_child_poa (argc, argv, "child_poa") == -1){
CORBA::String_var str =
this->orb_manager_.activate_under_child_poa (servant_name,
this->servant_.in ());
}
这是TAO_ORB_Manager的一些描述：
class TAO_UTILS_Export TAO_ORB_Manager
{
/**
* Creates a child poa under the root poa with PERSISTENT and
* USER_ID policies. Call this if you want a @a child_poa with the
* above policies, otherwise call init.
*
* @retval -1 Failure
* @retval 0 Success
*/
int init_child_poa (int &argc,
ACE_TCHAR *argv[],
const char *poa_name,
const char *orb_name = 0);
/**
* Precondition: init_child_poa has been called. Activate <servant>
* using the POA <activate_object_with_id> created from the string
* <object_name>. Users should call this to activate objects under
* the child_poa.
*
* @param object_name String name which will be used to create
* an Object ID for the servant.
* @param servant The servant to activate under the child POA.
*
* @return 0 on failure, a string representation of the object ID if
* successful. Caller of this method is responsible for
* memory deallocation of the string.
*/
char *activate_under_child_poa (const char *object_name,
PortableServer::Servant servant);
...................
}
构建之后，我可以使用-ORBListenEndpoints iiop：// localhost：2809选项获得我想要的内容。谢谢@Johnny Willemsen的帮助
答案 0 :(得分：1)
您必须使用持久性生命周期策略创建POA，请参阅ACE_wrappers / TAO / tests / POA / Persistent_ID作为TAO分发的一部分。