DDS is being increasingly selected as the foundation of many mission- and business-critical systems. Some of these systems are designed to be completely data-centric and asynchronous, while others prefer to maintain some interactions (such as placing an order, performing a computation, etc.) as traditional client/server, request/reply, interactions. As such, many DDS users would like to define Services as a collection of operations/methods, and invoke methods using DDS as the transport for requests, replies and exceptions. This talk will introduce eProsima RPC for DDS, a high performance Remote Procedure Call framework based on DDS, 100% standards-based and open source.

1. eProsima RPC over DDS
OMG Technical Meeting, Berlin
18/06/2013
Jaime Martin Losa
CEO eProsima
JaimeMartin@eProsima.com
+34 607 91 37 45 www.eProsima.com

2. Agenda
 eProsima RPC over DDS
– RPC over DDS
 Introduction
 Performance
 Standarization
 Hands on Example
 Interoperability Demo!
 About eProsima
 eProsima Success Cases

3. eProsima RPC
over DDS

4. DDS
DDS uses the concept of Global Data Space. In this Space we define
topics of data, and the publishers publish samples of these topics. DDS
distributes these samples to all the subscribers of those topics. Any node
can be a publisher or a subscriber.
No Remote Procedure Calls

5. RPC over DDS
 DDS implements a pub/sub model, but no a
direct way to do Remote Procedure Calls (RPC)
 DDS Can be used though for RPC with some
effort:
– We could create a couple of topics, one for the in
parameters of the function we want to call, and the
other one for the out parameters, and then
implement the client-server interaction through a
couple of pub-sub.

6. Client-Server comms over DDS
 myService.idl:
interface myService{
funReturnValueDataType Fun(DataType1 parameter1,
DataType2 parameter2…);
}

7. Client-Server comms over DDS:
Manual Steps
 Common:
– Client main, Server main.
– Client and Server code for data flow management, initialization
and setup of DDS entities, server threading…
 For each operation:
– Request and Reply topics
– Client and Server code to manage function calls/return-values,
parameters...

8. Client-Server comms over DDS:
Automatic (using eProsima RPC over DDS)
 A parser creates all the stuff you need.
 For each operation, just implement the behavior.

9. eProsima RPC: Advantages
 Allows to the developer focus in the development of his
application.
 Approach similar to Apache Thrift, but easier to use and
with configurable QoS
 Transparent.
 Multithreaded Server.
 Automatic Generation of:
– Client and Server Code.
– Request and Reply Topic
– Development enviroment files: Visual Studio
projects or makefiles

10. eProsima RPC: Features
 Open Source: LGPL
– Support available
 Main Features:
– Windows and Linux support (32 and 64 bits)
 Project and makefile generation for VS2010 & gcc 4.x
– Synchronous, asynchronous and one way operations
– Different Server threading models
 Single threaded, thread by request and thread pool
– Internet enabled:
 udp (unicast/multicast) and TCP support
– 100% Standard: ISO C++ and OMG DDS
 RTI DDS and OpenDDS supported

11. Performance vs Web Services
(Throughput)
0
100
200
300
400
500
600
700
10 100 200 300 400 500
Requests/sec
Request Payload (bytes)
eProsima RPC vs Web Services (25 Clients)
eProsima RPC
Web Services

12. Performance vs Apache Thrift
(One to One Latency)
0
100
200
300
400
500
600
700
100 250 500
Latency(MicroSeconds)
Request/Reply Size (bytes)
One to One Latency
eProsima RPC over DDS
Apache Thrift

13. Performance vs Apache Thrift
(Many to One Latency)
0
200
400
600
800
1000
1200
1400
100 250 500
Latency(MicroSeconds)
Request/Reply Size (bytes)
Four to One Latency
eProsima RPC over DDS
Apache Thrift

14. Standarization
 OMG Standard ongoing
– RPC for DDS RFP (public)
– eProsima, RTI, PrismTech
– Revised Submission : May, 20, 2013
– To discuss in this OMG meeting
 June 17,18 – Berlin
 See www.eprosima.com for more info.

15. Hands on: A First Example
 Install the software:
– DDS
 http://www.rti.com/downloads/connext.html
– eProsima RPC over DDS
 http://www.eprosima.com/index.php/en/downloads-all
 Windows and Linux (32 & 64) supported

16. Hands On: Calculator
 Create Calculator.idl
 Generate Interface Support :
///////////////////////////
// KIARA Webinar Example //
///////////////////////////
interface Calculator {
float sum (in float x,in float y); // x+y
float substract (in float x,in float y); // x-y
float multiply (in float x,in float y); // x*y
};
rpcddsgen -ppDisable -example x64Win64VS2010 Calculator.idl

17. Hands On: Calculator
 Edit the Example:
– Client.cxx
– CalculatorServerImpl.cxx
// Call to remote procedure "sum".
try
{
sum_ret = proxy->sum(2, 2);
std::cout << “Server Says 2+2=" << sum_ret << std::endl;
}
DDS_Float CalculatorServerImpl::sum(/*in*/ DDS_Float x, /*in*/ DDS_Float y)
{
DDS_Float sum_ret = 0;
sum_ret = x+y;
return sum_ret;
}

18. Hands On: Calculator
 Run the Client and the Server
– Same or different connected machines
– Remember to disable/setup firewall
D:KIARA_Webinar_Examplesmathobjsx64Win64VS2010>CalculatorClient
Server says 2+2=4
D:KIARA_Webinar_Examplesmathobjsx64Win64VS2010>

19. Interoperability Demo
CalculatorServer
(Linux, OpenDDS)
CalculatorServer
(Linux, RTI Connext DDS)
CalculatorClient
(Windows, OpenDD
S)
CalculatorClient
(Windows,
RTI Connext DDS)

20. RPC over DDS
 Features Summary:
– Easy RPC framework
– High Perfomance
– Windows/Linux Support
– 100% Standards Based
– Open Source: LGPL
 Support Available
– Interoperable!

21. About eProsima

22. About eProsima
 Experts on middleware, focused on DDS.
 OMG Members.
 RTI Services Partner and Distributor.

23. About eProsima: Products And Services
 eProsima Products:
– DDS based: Plugins, add-ons, adaptors, etc
 Services:
– Communication modules, App development, DDS
training, Support.
 R&D:
– R&D Projects with enterprises and universities.
 Quality: ISO 9001
– Design, Development, Marketing and Support of
Software.

24. Customers (I)
 Amper Programas:
– BMS
– Simacet (Main Spanish C2 System)
 Cassidian:
– UAVs - Neuron, Atlante
 Ground Station Comm Server
– Comfut
 INDRA:
– Defense (BMS, UAV PASI)
– Air Traffic Control,
– SESAR, ATC Interoperability
– Energy (InSpeed)
 Spanish Army:,
– IDT :Tactical Data Interface

25. Customers (II)
 Isdefe
 Spanish Army: JCISAT, DGAM
 CATEC-FADA: R&D Aerospatial
 Santa Barbara: Armoured Vehicles
 RTI
 GMV

26. Customers (III)
 Tecnobit: COSMOS, Reserved Projects.
 IKERLAN: R&D.
 Navantia: F105 (Aegis)
 Boeing: Atlantida, Swim suit

27. eProsima Products.- Index
 eProsima RPC over DDS:
– Remote procedure calls framework over DDS.
 eProsima Fast Buffers.
– Serialization engine. Now in beta.
 eProsima DDS Non-Intrusive Recorder.
– Stores DDS communication history in a data base.

28. Ongoing Project
 FP7: KIARA, Future Internet Middleware
– FI-WARE 1st open call
– Based on eProsima RPC over DDS & OMG DDS
– Lots of new features:
 Improved IDL
 Direct Use of Application native types
 New formats of marshalling (SOAP, RestFul)
 Web Services compatibility
 Protocol negotiation
 Extended transport support
 High performance dispatching agent (RPC)

29. eProsima
Success Cases

30. RTI DDS DIL Plugins:
Disconnected and Intermitent Links
 eProsima developed the
plugins for the Spanish
Army Tactical Radios, and
later were adquired by
RTI.
 Allow the use of DDS in
very low bandwidth
links, such as Tactical
Radios and Satellite.
– Tested from 2400 bps

31. Tactical Data Interface: Spanish Army
 C2 Interoperability Comm
layer:
– Tactical Radios
 From 2400bps
– Satellite
 Mandated for all the
Spanish Army C2
systems.
– Already implemented in the
their main C2 systems
eProsima developed the army C2 comm layer using RTI Connext DDS
optimized for low bandwidth enviroments. The project included the design of
the Data Model and QoS requisites for the Army.

32. C2 Systems: INDRA & Amper
 eProsima Provides a
DDS based comm
layer for INDRA and
Amper C2 Systems.
eProsima implemented the mandated Spanish Army Tactical Data Interface for
Simacet (Main Spanish Army C2 System, Amper) and BMS (Tanks C2
System, INDRA & Amper)

33. SESAR - INDRA ATC
 eProsima provides
middleware research and
prototyping for ATC
Interoperability
 Among the different
middleware technologies
studied, DDS and WS are
the SESAR proposed
technologies for ATC
interoperability.

34. Cassidian: nEURon and Atlante GS
 eProsima provides
the comm layer for
the ground station
comm server.
eProsima Non-Intrusive Recorder is used to record the
communications for later analisys.

35. FI-WARE Middleware
 eProsima has been
selected to develop
Future Internet
Middleware in the FI-
WARE programme.
 DDS will be the core
technology
Fi-WARE is a consortium of over more than 30 companies and universities
including Telefonica, Siemens, SAP, Atos…
eProsima will partner in this project with the German Universities DKFI and CISPA
and the Swiss ZHAW.

36. Remote
Application
Client /
Server,
Publisher /
Subscriber
Application
API / Data Access
Marshalling
Transport
Mechanis
ms
Wire- Protocols
Transport Protocols UDPTCP
TLS, DT
LS
Shared
Memory
Backplane/
Fabric
XML JSON CDR
SDN
Plugin
Data Transfer
Compile time or
Embedded Runtime
Compiler/Interpreter
Data / Function
Mapping
Declarative
Data/Function
descritption
Security /
QoS Policy
Security / QoS
Parameter
Function
Stub
Function
Skleleton
QoS
Data
Writer
Data
Reader
-
DDS /
RTPS
REST /
HTTP
RPC Pub/Sub
Negotiation
Publisher Subscriber
RPC
Server
RPC
Client
Prepare Initialize
IDL
Parser
• IDL
based
on OMG
IDL
• WADL
Security
Dispatching
I2ND GE
FI-WARE Middleware: DDS Based

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