This document provides instructions for creating a simple HL7 sender and receiver project using OpenESB. It describes how to create BPEL projects to poll for HL7 messages from a file system and send them over MLLP to an external system. It also covers creating a BPEL project to receive HL7 messages over MLLP, convert them to XML, and write them to a file. Composite application projects are created to deploy the sender and receiver projects. The projects are tested by sending a sample HL7 message file and verifying the acknowledgement and converted XML files are produced.

1. OpenESB Tutorial
Simple HL7 Sender and Receiver

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ABOUT LOGICOY
 LogiCoy incorporated in February 2009.
 Headquarters in Los Angeles, California with 24/7 offices in US, and
India, is a Global Information Technology and Services company
providing products and services in integration and middleware across
various industries including financial, healthcare, telecommunications,
manufacturing, and government.
 We are the original architects, developers and engineering managers
and directors for Seebeyond eGate, ICAN, Sun Java CAPS, Mural
MDM,Open/GlassFish ESB products from inception to end and know
the code inside and out.
 We are active committers of the OpenESB codebase in the OpenESB
Open source repository and actively working on the enhancements
and new versions of OpenESB.
 We have augmented our product development with very seasoned
SOA/EAI Technical Leads and Architects for integration solutions with
field implementation experience using Sun Java CAPS, GlassFish
ESB, eGate and other integration tools in healthcare integration
projects.
 Contact us at: info@logicoy.com
ABOUT THE AUTHOR
Fred Aabedi is the Chief Technology Officer at LogiCoy. Prior to LogiCoy,
he was the Senior Engineering Director for the Sun Java CAPS, GlassFish
ESB components, and SeeBeyond ICAN, and eGate 4.5 Suite of adapters,
addons, and messaging libraries. He also held Chief Technical Advisor role
for healthcare and financial and government sectors in the Sun SOA
Business Integration Engineering group. He was the OpenESB Community
lead from inception to near the end of Sun acquisition by Oracle and
currently very active in many aspects of the OpenESB community.

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Table of Contents
Introduction...........................................................................................................................................................................2
Create HL7 Sender BPEL Project.....................................................................................................................................4
Create WSDLs for the HL7 Sender Project...................................................................................................................5
Create HL7 Sender Composite Application Project ................................................................................................. 14
Deploy HL7 Sender Composite Application Project................................................................................................. 17
Create HL7 Receiver BPEL Project................................................................................................................................ 18
Create WSDLs for the HL7 Receiver Project.............................................................................................................. 19
Create HL7 Receiver Composite Application Project............................................................................................... 25
Deploy HL7 Receiver Composite Application Project .............................................................................................. 27
Test HL7 Sender and Receiver Projects....................................................................................................................... 28
Conclusion.......................................................................................................................................................................... 30
Introduction
This document describes how to create a simple HL7 Sender and Receiver
project.
I am assuming you have done some basic OpenESB projects. If you have
not, you may want to try a HelloWorld example in OpenESB first to get
familiar with OpenESB.
The HL7 Sender project polls for files on a file system containing HL7
messages and sends them over MLLP to an HL7 external using the HL7
Outbound port and then writes the acknowledgement back to the file
system.
The HL7 Consumer (Receiver) project connects up the HL7 interface over
MLLP (port 4040) and receives the HL7 messages, converts to XML and
writes the data out to a file in XML format.
To create or use these projects you need an OpenESB installation.
There are other articles for installing OpenESB. I recommend installing
OpenESB V2.3 from the community site:
http://open-esb.net/index.php?option=com_content&view=article&id=113&Itemid=583

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Once installed and running, please use the GlassFish admin console to
install the HL7 Binding Component runtime jar from:
https://s3.amazonaws.com/LogiCoy/OpenESB2.3/hl7bc-installer-2.3.0-SNAPSHOT.jar
Choose directory where the HL7 BC jar is, click Open Next Finish
If you would like to import and use the projects instead of creating them
from scratch, please download the zip file from the link below and unzip to
your netbeans project folder:
https://s3.amazonaws.com/LogiCoy/OpenESB2.3/Examples/HL7Projects.zip

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Create HL7 Sender BPEL Project
First, we create the HL7 Sender BPEL project!
Run the OpenESB Netbeans IDE.
Select Projects tab and New Project SOABPEL Module- Enter project
name HL7MsgSender and click Finish

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Create WSDLs for the HL7 Sender Project
For this HL7 Sender project we need a File and a HL7 WSDL.
HL7MsgSender_FileReceive WSDL:
Input1

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Output1
For the File Inbound, file-address, you can specify a File Binding
Component Application Variable instead of hard coding the directory path.
This is a good practice and allows for defining the value to be determined
based on your environment settings on the GlassFish admin server. The
variable name is: ${hl7MsgPollDir}.

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Please set an appropriate value for it on the GlassFish admin console.

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HL7MsgSender_HL7Send WSDL:
This is the outbound HL7BC WSDL and you need to set appropriate
host/port values, for hl7:address

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and hl7:protocolproperties

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Now you can edit your HL7MsgSender BPEL process and drag and drop
the FileReceive WSDL to the left side of the BPEL editor and HL7Sender
WSDL to the right.
You can then add partner links!

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Assign1 activity
HL7Invoke

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Assign2
HL7AckReply

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Create HL7 Sender Composite Application Project
Click File New ProjectSOAComposite Application

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Project name: HL7MsgSenderCA
Click Finish.

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Add the BPEL module HL7MsgSender and click Build Project.

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Deploy HL7 Sender Composite Application Project
Click on Deploy Project button

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Create HL7 Receiver BPEL Project
FileNew Project SOABPEL Module- Enter project name
HL7MsgConsumer and click Finish

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Create WSDLs for the HL7 Receiver Project
For this HL7 Receiver project we need a File and a HL7 WSDL.
HL7MsgConsumer_FileSend WSDL:
FileOutboundBinding - Input1
Output filename: HL7Msg.xml
For the File Outbound, file-address, you can specify a File Binding
Component Application Variable instead of hard coding the directory path.
This is a good practice and allows for defining the value to be determined
based on your environment settings on the GlassFish admin server. The
variable name is: ${hl7MsgOutDir}.

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Please set an appropriate value for it on the GlassFish admin console.
HL7MsgConsumer_HL7Receiver WSDL:
This is the inbound HL7BC WSDL and you need to set appropriate
host/port values, for hl7:address

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and hl7:protocolproperties
Now you can edit your HL7MsgConsumer BPEL process and drag and
drop the HL7MsgReceive WSDL to the left side of the BPEL editor and
FileSend WSDL to the right.
You can then add partner links!

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Assign1 activity

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FIleSend- Write operation

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Create HL7 Receiver Composite Application Project
Click File New ProjectSOAComposite Application

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Project name: L7MsgConsumerCA
Click Finish.
Add the BPEL module HL7MsgConsumer and click Build Project.

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Deploy HL7 Receiver Composite Application Project
Click on Deploy Project button

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Test HL7 Sender and Receiver Projects
Create a file with name HL7Msg.hl7 and place it in the inbound file
directory indicated by your FIleBC application variable
${hl7MsgPollDir}, which in this case is tmpdata and put some HL7
data in it. For example:
MSH|^~&|SMS|IAH|CERNER|PATHNT|200201291848||ADT^A03|agre|P|2
.3|||AL|NE|
EVN|A01|200201291848|||ABCKB1
PID||53820452|00664524|220675537|SMITH^JOHN^^^^||19781218|M||E|1
234 MAIN RD #B1^^LOS ANGELES^CA^90024||(310)555-
5555|||||0012320412|220675537||
PV1||I|2324^2302^-B ||||04100^SMITH EDWARD
M|||MED|||||||04100^SMITH EDWARD
M|S||S|P||||||||||||||||||IAH|||||200201291848|
PV2|||^SEIZURE, FEVER, RLQ PAIN
Observe, that the file is picked up by the HL7 Sender project , and sent to
the HL7 Receiver project via MLLP protocol and that an acknowledgement
is received and written back to the file system with filename HL7Ack.txt with
the following content:
MSH|^~&|CERNER|PATHNT|SMS|IAH|200201291848||ACK|agre|P|2.3
MSA|AA|agre
Also, observe that the HL7 Consumer (Receiver) project receives the HL7
message from the HL7 Sender project over MLLP (port 4040) and converts
it to XML and writes the data out to the HL7Msg.xml file in the directory
pointed to by by your FIleBC application variable ${hl7MsgOutDir}.

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The contents look should like this:

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Conclusion
I hope this tutorial is helpful in your usage of OpenESB for HL7 integration
projects.
Please note that you can substitute your own HL7 Sender or Receiver
external system using any other HL7 compliant tool to communicate and
exchange data with the appropriate OpenESB HL7 project counterpart.
You can access additional tutorials on the LogiCoy blog page:
http://logicoy.com/logicoyblog/
Also, the OpenESB Community Website contains additional tutorials:
http://www.open-esb.net/
Also, Michael Czapski has healthcare related tutorials:
http://blogs.czapski.id.au/wp-
content/uploads/2013/03/OpenESBIsALiveAndWellAndLivingIn..._v0.1.0.pdf
http://blogs.czapski.id.au/category/openesb-v2-3-articles
Please send your comments/feedback about this article to:
info@logicoy.com