ETA Quick Start - Connecting to Elektron Real Time in Cloud
|Last Update||April 2019|
Setup your build environment as outlined in the ESDK Build System instructions
ERT in Cloud credentials i.e. Machine ID (username) and Password
The goal of this Quick Start tutorial is to guide you through initial steps required to execute an Elektron Transport API (ETA) C++ example application in order to consume some data from Elektron RealTime (ERT) in Cloud services.
ETA is a sub-component of the ESDK (Elektron SDK) which includes several examples to demonstrate various functionalities of ETA. Below we will invoke one of these examples that supports ERT in Cloud type connection, using your credentials, to request streaming market data content from ERT in Cloud.
The tutorial will cover both Linux and Windows environments.
Build and run an ERT in Cloud example
As per the Prerequisite, you should have already worked through the ESDK Build System section which covers Downloading and Building the makefiles / solution files.
Several ETA examples can be found in the Cpp-C/Eta/Applications/Examples subdirectory. Here you can find directories for the various Consumers and Providers examples (as well as common directories for shared source). The readme file in each example directory explains the purpose and functionality of each example.
Compile the sample
If you have not already compiled all the examples, we will compile an ERT in Cloud compatible consumer example -
VAConsumer which supports connectivity to an ERT in Cloud server. It relies on the command line to specify your connectivity parameters and your user credentials to connect and login to the ERT in Cloud server.
Once connected, the example requests the specified instrument and then outputs the server response(s) to standard out on the console.
Following is the path to relevant directories:
|Example Source Code||<ESDK root>\Cpp-C\Eta\Applications\Examples\VAConsumer|
|Generated project file||SOLUTION_FILES\Cpp-C\Eta\Applications\Examples\VAConsumer|
|Output Binary||<ESDK root>\Cpp-C\Eta\Executables\ *|
|Libcurld library||<ESDK root>\installdb|
To build this example, navigate to directory
SOLUTION_FILES\Cpp-C\Eta\Applications\Examples\VAConsumer and open & build the VAConsumer.vcxproj in the version of Visual Studio that you specified during the ESDK Build stage.
For Linux, run make in this directory.
The compiled output will be in a sub directory of the
<ESDK root>\Cpp-C\Eta\Executables\ directory - the exact sub directory name location will vary depending on your OS, compiler and build type etc.
Libcurl Library files
The ERT in Cloud connectivity example has a dependency on the Libcurl library - therefore you will need to ensure the example is able to load the relevant library file as follows:
Add the relevant subdirectory (as determined by your OS and build type) to LD_LIBRARY_PATH e.g. for RHEL Optimized build, it could be something like:
export LD_LIBRARY_PATH=<ESDK root>/installdb/RHEL6_64_GCC444/Optimized/lib64
The exact directory path will be determined by where you have unpacked the SDK, your OS and build type.
Copy the library files to the relevant Executables subdirectory e.g. for a Visual Studio 2017 Release build, it could be something like:
copy <ESDK root>\installdb\WIN_64_VS150\bin\*.* <ESDK root>\install\Cpp-C\Eta\Executables\WIN_64_VS150\Release_MD
The exact directory paths will be determined by where you have unpacked the SDK, your Visual Studio version and build type .
ERT in Cloud Connectivity parameters and User credentials
In order to execute this step, you need to have a valid Username and Password for ERT in Cloud. When you subscribed to ERT in Cloud, you should have received a Welcome Email with your 'Machine ID' (i.e. user name) and a link to activate your account & set your password. If you have not already done so, activate your account and set your password.
If you do not have that email please contact your Refinitiv account team, or if you are not a client please click Contact Us page if you would like to try our Elektron Real Time in Cloud service.
The mininum required command line parameters for the
VAConsumer example to connect to ERT in Cloud are as follows:
- your user name (Machine ID) with the
- password you previously set with the
-sessionMgntparameter to perform authentication token management etc.
So, for example the following will connect to the emea-1 server and request MarketPrice data for IBM.N from the ELEKTRON_DD service
>VAConsumer -encryptedSocket emea-1.pricing.streaming.edp.thomsonreuters.com:14002 ELEKTRON_DD mp:IBM.N -uname <Username/Machine ID> -passwd <Password> -sessionMgnt OR >./VAConsumer -encryptedSocket emea-1.pricing.streaming.edp.thomsonreuters.com:14002 ELEKTRON_DD mp:IBM.N -uname <Username/Machine ID> -passwd <Password> -sessionMgnt
The RIC code IBM.N can be replaced with an alternative instrument - use the RIC Search page to identify the RIC code for your preferred instrument.
Upon execution, you should be presented with various messages indicating Connection Up & Login sucess, followed by some Market Price data in the form of a 'RefreshMsg'.
Running the Example
Below, we are connecting to the amer-1 server and requesting MarketPrice data for 'IBM.N' from the service 'ELEKTRON_DD':
>./>VAConsumer -encryptedSocket amer-1.pricing.streaming.edp.thomsonreuters.com:14002 ELEKTRON_DD mp:IBM.N -uname <Username/Machine ID> -passwd <Password> -sessionMgnt Connections: amer-1.pricing.streaming.edp.thomsonreuters.com:14002 ELEKTRON_DD MarketPriceItems: IBM.N MarketByOrderItems: MarketByPriceItems: YieldCurveItems: MarketPriceItems (Private Stream): MarketByOrderItems (Private Stream): MarketByPriceItems (Private Stream): YieldCurveItems (Private Stream): Unable to load field dictionary. Will attempt to download from provider. Error Text: Can't open file: 'RDMFieldDictionary'. Unable to load enum type dictionary. Will attempt to download from provider. Error Text: Can't open file: 'enumtype.def'. Adding connection to amer-1.pricing.streaming.edp.thomsonreuters.com:14002... Connection up! Channel fd=704 Received Login Response State: Open/Ok/None - text: "Login accepted by host ads-premium-az1-green-8-main-prd.use1-az1." Received Source Directory Response: State: Open/Ok/None - text: "" Received serviceName: PERM_SVR_SNKDRV Received serviceName: ELEKTRON_DD Service State: Up Received Dictionary Response: RWFFld Field Dictionary complete. Received Dictionary Response: RWFEnum Enumerated Types Dictionary complete. (Channel 704): IBM.N DOMAIN: RSSL_DMT_MARKET_PRICE State: Open/Ok/None - text: "*All is well" PROD_PERM 62 RDNDISPLAY 64 DSPLY_NAME INTL BUS MACHINE RDN_EXCHID NYS(2) TRDPRC_1 139.030000 TRDPRC_2 139.020000 TRDPRC_3 139.020000 TRDPRC_4 139.020000 TRDPRC_5 139.020000 ... ... ELG_ACVOL 131594 ELG_TNOV 18313368.8600 ODDTRN_UNS 2518486.4850 TRNOVR_UNS 20831855.3450 ACVOL_UNS 149692 (Channel 704): IBM.N DOMAIN: RSSL_DMT_MARKET_PRICE UPDATE TYPE: 1 BID 139.010000 ASK 139.070000 BIDSIZE 2 ASKSIZE 2 BID_COND_N R ASK_COND_N R GV1_TEXT LIMIT_INDQ (0) PRC_QL_CD R (60) ... ... QUOTIM_MS 55871638 QUOTIM 15:31:11:000:000:000 SETL_TYPE NRM(5) BOOK_STATE N(1) ORDRECV_MS 15:31:11:638:000:000
The initial Refresh Msg (also known as initial image) contains all fields (above output is truncated) for the requested instrument representing the latest up-to-date market values. Following this image, you will begin to see Update Msgs i.e. realtime updates reflecting changes in the market.
You can (Ctrl+C) to exit the application at any time.
Q: How can I get an Elektron Data Platform username and password
A: Please contact your Refinitiv Account Manager or Technical Relationship Manager to help you to access EDP account and services.
Once you have successfully completed the steps above, you can further your learning by following the series of ETA tutorials.
If you plan to run your ETA C++ application within the Amazon Cloud, you can refer to the Setting Up an Amazon EC2 instance article for details. Once you have setup the EC2 instance, based on the Refinitiv AMI, you can find scripts to run the above
VAConsumer example within the Elektron-SDK sub-folder of the /home/ec2-user directory.
For further details, please check out the following resources:
- Refinitiv Elektron SDK Family page on the Refinitiv Developer Community web site.
- Refinitiv Elektron: RIC Search
- Refinitiv Data Model Discovery page: Explore TR data models, content definitions and data update behaviors
For any question related to this quick start guide or Elektron Real Time in Cloud, please use the Developer Community Q&A Forum.