Small Presentation of eProsima RPC over DDS, for more information please visit www.eprosima.com

1. eProsima RPC over DDS
for RTI Connext DDS
Connext Conference, London 2015
15/10/2015
Jaime Martin Losa
CTO eProsima
JaimeMartin@eProsima.com
+34 607 91 37 45 www.eProsima.com

2. Old solution: Manual
2
Struct FunRequest {
RequestID;
RequestParameter1;
/* ... */
RequestParameterN;
};
Struct FunReply {
RequestID;
ReplyResult1;
/* ... */
ReplyResultN;
};

3. RPC over DDS Standard: Automatic
3
interface MyInterface {
funReturnValueType Fun(in MyTypeI1 m1,in MyTypeI2 m2,...,
out MyTypeO1 n1, out MyTypeO2 n2,...,
inout MyType1 l1,inout MyType2 l2 );
/* ... */
};

4. Architecture
Request Topic
Reply Topic
ClientApp
Publisher Subscriber
STUB
Requester
ServiceApp
Publisher Subscriber
Skeleton
Replier
Resource Aware
Dispatching Agent
Global Data Space
4

5. Definition of the
Services

6. Definition of the services
 OMG IDL 3.5 + DDS-XTYPES is used
– “Any” and “valuetype” not part of DDS-XTYPES
 Exceptions supported
 Atributes in the interfaces ignored
 Oneway invocations supported throught the IDL
oneway keyword
6

7. eProsima RPC over DDS
for RTI Connext DDS

8. eProsima RPC over DDS Features
 Open Source: LGPL – Published on GitHub
 Windows and Linux support (32 and 64 bits)
 Project and makefile generation for VS2010-3 &
gcc 4.x
 Synchronous, asynchronous and one way
operations
 Different Server threading models
 100% Standard: ISO C++ and OMG DDS
 Comprehensive documentation

9. eProsima RPC over DDS
 Available on:
– eProsima.com web site:
 http://www.eprosima.com/index.php/products-all/eprosima-
rpc-over-dds-all
– eProsima GitHub:
 https://github.com/eprosima

10. Example

11. Hands On: Calculator
 Create Calculator.idl
 Generate Interface Support :
///////////////////////////
// Connext Con Example //
///////////////////////////
exception divideByZeroEx{
long count;
};
interface Calculator {
float multiply(in float a,in float b);
float divide(in float a,in float b) raises(divideByZeroEx);
};
rpcddsgen -ppDisable -example x64Win64VS2013 Calculator.idl

12. Hands On: Calculator
 Edit the Example: CalculatorClientExample.cxx
// Call to remote procedures
try
{
return_ = proxy->multiply(16, 2); // multiply
std::cout << return_ << std::endl;
return_ = proxy->divide(16, 2); // divide
std::cout << return_ << std::endl;
return_ = proxy->divide(16, 0); // user exception
std::cout << return_ << std::endl;
}
catch (divideByZeroEx &ex)
{
std::cout << "divideByZeroEx" << std::endl;
}
catch (SystemException &ex)
{
std::cout << "System Exception:" << std::endl;
}

13. Hands On: Calculator
 Edit the CalculatorServerImplExample.cxx
DDS_Float CalculatorServerImplExample::multiply
(/*in*/ DDS_Float a, /*in*/ DDS_Float b)
{
DDS_Float return_ = a*b;
return return_;
}
DDS_Float CalculatorServerImplExample::divide
(/*in*/ DDS_Float a, /*in*/ DDS_Float b)
{
DDS_Float return_ = 0.0;
if (b == 0) {
throw divideByZeroEx();
}
return_ = a / b;
return return_;
}

14. Thank you!
Jaime Martin Losa
CTO eProsima
JaimeMartin@eProsima.com
+34 607 91 37 45 www.eProsima.com