KNIME node skeleton with sample code as described here.

This project uses Eclipse Tycho to perform build steps.

Installation

Requirements:

• KNIME, https://www.knime.org, version 4.0 or higher

Steps to get the Dummy KNIME node inside KNIME:

1. Goto Help > Install new software ... menu
2. Press add button
3. Fill text fields with url of update site which contains this node.
4. Select --all sites-- in work with pulldown
5. Select the node
6. Install software
7. Restart KNIME

Usage

1. Create a new KNIME workflow.
2. Find node in Node navigator panel.
3. Drag node to workflow canvas.

Build

To build the node extension and verify the tests run with the following command: mvn verify

Make sure all code is commited as the snapshot version is determined by git commit timestamp.

An Eclipse update site will be made in p2/target/repository directory. The update site can be used to perform a local installation.

Continuous Integration

Configuration files to run Continuous Integration builds on Linux (Travis-CI), OS X (Travis-CI) and Windows (AppVeyor) are present.

See ./.travis.yml file how to trigger a Travis-CI build for every push or pull request. Also see ./.travis.yml file how to perform a SonarCloud analysis and code coverage.

See ./appveyor.yml file how to run on https://www.appveyor.com .

To cite the KNIME node, a DOI can be generated when a GitHub release is made. To enable, the GitHub repository must be connected on https://zenodo.org/account/settings/github/ . The connection must be made before creating a GitHub release. To cite the software a human and computer readable file called CITATION.cff is included.

Development

Steps to get development environment setup based on https://github.com/knime/knime-sdk-setup#sdk-setup:

1. Install Java 8
2. Install Eclipse for RCP and RAP developers
3. Configure Java 8 inside Eclipse Window > Preferences > Java > Installed JREs
4. Import this repo as an Existing Maven project
5. Activate target platform by going to Window > Preferences > Plug-in Development > Target Platform and check the KNIME Analytics Platform (4.0) - pm4knime.targetplatform/KNIME-AP-4.0.target target definition.
6. A KNIME Analytics Platform instance can be started by right clicking on the targetplatform/KNIME\ Analytics\ Platform.launch file and selecting Run As → KNIME Analytics Platform. The KNIME instance will contain the target platform together with all extensions defined in the workspace.

During import the Tycho Eclipse providers must be installed.

Tests

Tests for the node are in tests/src directory. Tests can be executed with mvn verify, they will be run in a separate KNIME environment. Test results will be written to test/target/surefire-reports directory. Code coverage reports (html+xml) can be found in the tests/target/jacoco/report/ directory.

The tests can be run against a different KNIME version using mvn verify -Dtarget.file=KNIME-AP-4.1 where 4.1 is the major.minor version of KNIME and KNIME-AP-4.1 is a target platform definition file called targetplatform/KNIME-AP-4.1.target.

Unit tests

Unit tests written in Junit4 format can be put in tests/src/java.

Workflow tests

See https://github.com/3D-e-Chem/knime-testflow#3-add-test-workflow

Speed up builds

Running mvn commands can take a long time as Tycho fetches indices of all p2 update sites. This can be skipped by running maven offline using mvn -o.

New release

1. Update versions in pom files with mvn org.eclipse.tycho:tycho-versions-plugin:set-version -DnewVersion=<version>-SNAPSHOT command.
2. Create package with mvn package, will create update site in p2/target/repository
3. Run tests with mvn verify
4. Optionally, test node by installing it in KNIME from a local update site
5. Append new release to an update site
   1. Make clone of an update site repo
   2. Append release to the update site with mvn install -Dtarget.update.site=<path to update site>
6. Commit and push changes in this repo and update site repo.
7. Create a Github release
8. Update Zenodo entry
   1. Correct authors
   2. Correct license

Attributes

The https://github.com/3D-e-Chem/tycho-knime-node-archetype was used as as archetype for this repository.