Documentation for Building an App from Hello, OpenICE!

This documentation contains instructions for the following topics to assist developers wishing to work with Hello, OpenICE!:

  1. How to Setup Eclipse for JavaEE
  2. How to Setup Gradle for Eclipse
  3. Getting Started with Git Revision Control
  4. How to Build Hello OpenICE
  5. How to Build a Skeleton OpenICE Application

Instructions on this page are written for Windows users. Be sure to convert syntax of all code to your preferred OS.

How to Setup Eclipse for JavaEE


Eclipse is a popular, open source IDE (Integrated Development Environment), with optional support for a wide variety of languages. Java-language application and library development

Install Java Development Kit Version 8

  1. Browse to
  2. Under Java SE Development Kit 8u45, click on Accept License Agreement
  3. In that same section, click on jdk-8u45-windows-x64.exe (or whatever java is appropriate for your OS).
  4. Install the downloaded file (run as Administrator).
  5. Set the following Windows environment variables:
    1. JAVA_HOME to point to the root of your newly-installed JDK (likely somewhere directly under C:\Program Files\Java)

Install Eclipse MARS Version for Java EE

  1. Browse to the Eclipse Downloads page
  2. Select your OS from the dropdown on the upper-right
  3. Click on the version of Eclipse you want. E.g. Eclipse IDE for Java EE Developers, 64-bit Windows version.
  4. Unzip the downloaded zip file to somewhere under your Documents folder.
  5. Make a shortcut from the new eclipse/eclipse.exe to your desktop or task bar - somewhere where it will be easy for you to run.

Configure Eclipse

  1. Create a lib folder. Later on, you may get errors about the eclipse/lib folder not existing. To avoid this problem, create a lib folder under the Eclipse root folder. E.g. C:\Users\username\Documents\eclipse\lib

How to Setup Gradle for Eclipse


Gradle is an open source software build manager.

Install Prerequisites

  1. How to Setup Eclipse for JavaEE

Install Gradle

  1. Browse to
  2. Click the large green button labeled Download Gradle 2.6
  3. Extract the contents of the downloaded Zip file
  4. Copy the extracted folder to somewhere under Documents. E.g., move the gradle-2.6 folder to Documents/
  5. Create an environment variable named GRADLE_HOME with a value of your copied gradle directory. E.g., set GRADLE_HOME to C:\Users\username\Documents\gradle-2.6
  6. Add to your PATH environment variable the GRADLE_HOME\bin folder
  7. Test the installation
    1. Open a Command Prompt window
    2. Type gradle -v
    3. Gradle should respond with its version information

Install the Gradle Plugin for Eclipse

Note: you need do these steps only once; not once per Eclipse Workspace

  1. Start Eclipse
  2. Get to the Workspace view in Eclipse (close the welcome screen if it’s up). Any workspace is fine; it doesn’t have to be the workspace you’ll be doing Gradle work in.
  3. Browse to Gradle Integration for Eclipse in the Eclipse Marketplace
  4. In the browser, notice the button labeled Install (under the Eclipse Icon). Drag that button to the Project Explorer pane (the left pane) of your running Eclipse instance.
  5. After some progress graphics, a Confirm Selected Features dialog will appear.
  6. In the Confirm Selected Features dialog, click Confirm
  7. Read the license terms dialog and if you agree, click I accept…
  8. Click Finish
  9. When prompted, restart Eclipse
  10. Test that the plugin is installed
    1. Select File / Import…
    2. Note that the alphabetical import types list includes a section named Gradle

Getting Started with Git Revision Control


GIT is a file-revision control system, popular for open source projects because it supports distributed development. Unlike earlier revision control systems, it has no central server: each user has a separate copy of all the file revisions.

GitHub has a nice cheat sheet once you’re familiar with Git.


  1. Browse to the GIT download page
  2. Click on the link for your OS (Windows, Linux, Mac). The download will start.
  3. On Windows, run the downloaded .exe as administrator.

Common Operations

Configure Git

Git-Gui (above) configures during installation.

FYI, there are 3 levels of Git configuration file: global, per-user, and per-local-repository. In Windows, the files are:

  • C:\Program Files (x86)\Git\etc\gitconfig (no ‘.’ prefix)
  • C:\Users\your_username\.gitconfig
  • etc\gitconfig in each of your local repostory folders

You can change configuration using Git Bash (installed with Git-gui, above). Run Git Bash, then type

  • git config --list to print the current configuration
  • git config --global "Nathan Hale" to change your Git contributor name to “Nathan Hale”
  • git config --global to change your Git contributor email address

Viewing Manual Pages

  1. run “git bash”
  2. type git help config (or whatever command other than config you want to know about)
  3. A browser will open on a local copy of that git command’s manual page.

Clone a Repository - Get a Copy of a Project

Suppose you want to clone the Webduino project

  1. Find the url of that Git repository. For GitHub projects such as Webduino, there’s box in the right-hand column, labeled Https clone URL. Click the icon to the right of the box. That will copy the URL to your clipboard.
  2. Run git GUI
  3. Click on Clone Existing Repository
  4. Paste the Https clone URL into the box labeled Source Location
  5. Click the button next to Target Directory labeled Browse
  6. Choose the parent folder you want this repository to be cloned into. E.g. C:\Users\username\Documents\git
  7. Click OK
  8. Manually add the name of the repository to the end of the Target Location filename, resulting in, for example, C:/Users/username/Documents/git/Webduino
  9. Click Clone
  10. Once the clone is complete, you will see a commit window
  11. Close git GUI Now that you’ve cloned the repository, you can edit the files in the target folder (e.g., C:/Users/username/Documents/git/Webduino) in any way you like.

Cloning instead using Git Bash or native Linux git

  1. Find the url of that Git repository. For GitHub projects such as Webduino, there’s box in the right-hand column, labeled Https clone URL. Click the icon to the right of the box. That will copy the URL to your clipboard.
  2. cd to the folder you want your clone to reside in
  3. git clone urlOfTheRepo using the url you copied in step 1
    • If you instead want the repo folder to have a different name than the default: git clone urlOfTheRepo myRepoName

Bring your Local Repository Up to Date

You need to bring your local repo up to date before you can successfully push changes to the master repository for the project.

  1. git pull origin master
  2. Depending on the git implementation, you may be prompted for your username and password on the repo site.

Commit Changes

  1. Make your edits to the files you want
  2. git status to see what files you haven’t staged yet.
  3. git diff to see the details of what hasn’t been staged yet.
  4. git add file1 file2 ... to add the current state of the listed files to the staging area. You can say git add foldername to add a folder’s contents to the staging area.
  5. git commit -m "explanation of what I changed" to commit changes to your local repository.
  6. git push origin master to push your committed changes to the master repository for this project.

Removing Changes Before a Commit

Suppose you’ve made changes to, but you’ve decided that those changes were a bad idea.

If you haven’t done a git commit yet, you can replace with the most recent version you’ve checked by typing

  • git checkout --

How to Build Hello OpenICE


OpenICE is an Open Source framework enabling applications using multiple medical devices such as insulin pump and multi-parameter patient monitors. These instructions apply to Windows systems.

Hello, OpenICE! is a simple Java application for sending and receiving OpenICE messages (DDS messages).

This page assumes you want to set up for OpenICE Java Eclipse development.

Install Prerequisites

  1. How to Setup Eclipse for JavaEE
  2. How to Setup Gradle for Eclipse
  3. Getting Started with Git Revision Control

Join the RTI Open Community

OpenICE uses the RTI DDS libraries. We need to accept the license for those libraries by joining RTI’s Open Community.

  1. Browse to RTI’s Open Community Source
  2. Fill in the fields
    1. For Industry select Healthcare
    2. For Infrastructure Community ID type ICE_IC01

Clone the “Hello, OpenICE!” Project and Prepare It for Importing

  1. Create a parent folder that will hold your cloned source. For this example, suppose it’s Documents\git\
  2. Browse to the Hello, OpenICE! git repo
  3. Copy the repo URL:
  4. Start Git Bash (or whatever git tool you use)
  5. cd to your parent folder. E.g., cd Documents\git
  6. git clone
  7. Exit Git Bash
  8. Open a Command Prompt
  9. cd to the cloned folder. E.g., cd Documents\git\hello-openice
  10. gradlew
  11. The Hello app should build. Importantly, it’s now ready to be imported into Eclipse
  12. exit the Command Prompt window

Import “Hello, OpenICE!” into Eclipse

  1. Start Eclipse
  2. Create a new workspace for Hello-OpenICE
    1. File / Switch Workspace / Other…
    2. Click Browse
    3. Create a folder to hold the project.
    4. Click OK; Click OK
  3. Wait for Eclipse to restart
  4. File / Import
  5. Gradle / Gradle Project
  6. Navigate to the root of the cloned Hello, OpenICE! folder. E.g., Documents\git\hello-openice
  7. Click Build Model
  8. Wait for the model to import. It may take a few minutes. When that’s done, a Hello OpenICE entry should appear in the window.
  9. Check the box next to Hello OpenICE
  10. Click Finish
  11. Wait for the project to import.

How to build a skeleton OpenICE application


This section covers how to create a new OpenICE application from nothing. If you’re just starting, you’ll likely want to instead start with How to Build Hello OpenICE.

Install Prerequisites

  1. How to Setup Eclipse for JavaEE
  2. How to Setup Gradle for Eclipse

Create an empty Gradle project

  1. Start Eclipse
  2. Create a new Workspace
    1. Select File / Switch Workspace / Other…
    2. Browse to where you want to create your project code
    3. Click Make new folder, and give it the name of your project
    4. Click the big arrow to go to the project view
  3. Select File / New / Other… / Gradle / Gradle Project
  4. Click Next
  5. For Project Name, type a name for your project e.g. HelloGradle
  6. For Sample Project, select Java Quickstart
  7. Click Finish
  8. Wait for the build to finish
  9. Expand your project in the Project Explorer pane
  10. Notice that there are a few example files, which we will eventually delete:,, test-resource.xml, etc. Don’t worry about that yet.
  11. Exit Eclipse - this is important so it isn’t confused by the next steps

Change build.gradle for OpenICE Work

Your new project is a blank Gradle Java application. Next we’ll change it to refer to the libraries required by OpenICE.

  1. In Windows Explorer, find the build.gradle file in your new project
  2. Open that build.gradle file in Wordpad (or your preferred text editor)
  3. Add to the apply plugin section:

     apply plugin: 'application'
  4. Add a Task Wrapper section:

     // builds a gradle wrapper
     task wrapper(type: Wrapper) {
         gradleVersion = '2.3'
  5. Change the java sourceCompatibility setting to 1.8, replacing the existing sourceCompatibility line:

     sourceCompatibility = '1.8'
     targetCompatibility = '1.8'
  6. Add the following to the repositories section, above the mavenCentral() line:

     maven { url '' }
     maven { url '' }
  7. Add to the dependencies section:

     compile 'org.mdpnp:x73-idl-rti-dds:0.6.3'
     compile 'org.slf4j:slf4j-api:1.7.10'
     runtime 'org.slf4j:slf4j-log4j12:1.7.10'
     runtime 'log4j:log4j:1.2.17'

Build the Adapted Project in Eclipse

  1. In Eclipse, in your new project’s workspace,
  2. In Project Explorer pane, right-click on your project and select Refresh
  3. In Project Explorer pane, right-click on your project and select Gradle / Refresh All
  4. Wait for the status in the workspace lower-right to complete (it may take a couple minutes)
  5. Create your package and a file using normal Eclipse Java commands.
  6. In your main() method, add System.err.println("Hello, World");
  7. Window / Perspective / Open Perspective / Debug
  8. Click the Debug Icon (the little spider icon in the upper-middle)
  9. Your simple app should run, and print Hello, World on the console pane

Add OpenICE Code

Now you should be able to add OpenICE/DDS-related code and use Eclipse’s normal resolution methods to add the Imports, etc. you need. In Eclipse, you can hover over underlined text that is causing an error and have Eclipse offer to fix the problem.

For example, you can add public class MyDataReaderListener implements DataReaderListener, and hover over DataReaderListener to see a suggested import. Click on that suggestion to implement that import.