Apache Camel IDEA Plugin

Plugin for Intellij IDEA to provide a set of small Apache Camel related capabilities to the code editor.

The plugin includes:

• Code completion for Camel endpoints in Java, Groovy, Kotlin, Scala, XML, properties or yaml files (ctrl + space)
• Code completion for Camel property placeholders (cursor after {{)
• Real time validation for Camel endpoints in Java, Groovy, Kotlin, Scala, XML (underline errors in red)
• Real time validation for Camel simple language in Java, Groovy, XML (underline errors in red)
• Endpoint options filtered to only include applicable options when used as consumer vs producer only mode
• Intention to add new Camel endpoint (alt + enter in empty string)
• Quick documentation for Camel endpoints and external link to Camel component opening in web browser (ctrl + j and shift-F1)
• Show endpoint information in tooltip when hovering mouse over from/to etc in Java route builders
• Supports 3rd party Camel components (if they have been properly built with Camel JSon schema metadata)
• Attempts to use same version as camel-core dependency from the loaded project (requires Camel 2.16.1 or newer and may require download over internet)
• Inspection (analyze code) to validate Camel endpoints in Java, Groovy, Kotlin, Scala, XML
• Camel icon in gutter can be customized by either the two provided icons or load a custom from file system
• Supports loading camel-catalog from third party Maven repositories define in the project Maven pom.xml file

When the plugin becomes more complete and stable then the intention is to donate the source code to Apache Software Foundation to be included out of the box at Apache Camel.

However currently the code is located at github to allow faster and wider collaboration in the community.

IDEA Compatability

The Camel IDEA plugin currently requires IDEA 2016.2 or newer. If you are using a older version of IDEA and still want to try the plugin, follow the guide here

The current plugin uses since-build 162

IDEA provides more information about their SDK versions here: http://www.jetbrains.org/intellij/sdk/docs/basics/getting_started/build_number_ranges.html

How to install

The plugin Apache Camel IDEA plugin is available from Jetbrains Plugin Repository at: https://plugins.jetbrains.com/idea/plugin/9371-apache-camel-idea-plugin

You should be able to install the plugin from within IDEA plugin manager. Open the Preference menu and select Plugins. Click the Browse repositories... if Apache Camel IDEA plugin is not available in the plugin list. From there you should be able to browse all the plugins from the Jetbrains remote plugin repository.

How to try

Currently the plugin is editing Java endpoints in Java source code.

You can open any Camel example which uses Java code, such as camel-example-spring-boot an select the MySpringBootRouter route class and position the cursor on any of the Camel endpoints after the '?' mark and press ctrl + space.

Currently its only endpoint options in the URI query section which can be edited. Its planned to add support for editing the options in the URI context-path section as well.

Preference

The plugin comes with a preference where you can configure global settings for the plugin such as turning on or off the real time validation in the editor, or whether to show the Camel icon in the gutter, etc.

Building from source

You can build the plugin from source code, which requires to setup IDEA for plugin development.

You can follow the guide from Jetbrains here: http://www.jetbrains.org/intellij/sdk/docs/basics/getting_started/setting_up_environment.html

To be able to browse the IDEA SDK source code you can clone the IDEA community source code, as described in the guide above. I did this so I can peak inside their source code, because you need this to find out how to hook into various IDEA APIs which is massive and takes longer time to figure out to use. Sadly Jetbrains are not very good at documenting their APIs with neither javadoc, or documentation to their own plugins. However with some trial and run you can find out bit by bit.

Importing project as maven project

Importing the project into IntelliJ as plug-in project requires a few steps before it possible.

First you need to install the "Intellij plugin development with Maven" in your IDEA

• Open Preferences -> Plugins
• Browse for plug-ins and search "Intellij plugin development with Maven"
• Install the plug-in by right click and press "Download and Install"
• Restart the IDE

Second you need to install the IntelliJ libraries into your local maven repository. The first parameter is the version of the IDEA you have installed locally, second is the locations of the IDEA. If you have installed IDEA in a different location than shown in the sample below, then make sure to use the correct path.

Currently we use IDEA 2016.3.2 as the version and therefore you should download and use that version. An alternative is to change the version in camel-idea-plugin/pom.xml file to use a different version but its not recommended.

Linux or Mac users:

• Execute the script file ./install-intellij-libs.sh 2016.3.2 /Applications/IntelliJ\ IDEA\ CE.app/Contents /Users/joe/.m2

Windows:

• Execute the script file ./install-intellij-libs.sh 2016.3.2.bat "C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2016.3.2"

Next step you need to update the pom.xml file with the right Intellij version number

• Open the pom.xml file
• Modify the property idea.version with the version number you have installed.
• Run "mvn install" or "mvn install -P ultimate" for running the Ultimate version of IDEA

Last step you need to import the project as maven project.

Important : if you are using the Ultimate version you need to enable the maven profile "uiltimate" when importing the project. Otherwise running the test will not work from IDEA

• Open your IDEA
• Create a new project from existing source
• Select the "camel-idea-plugin" location
• Import project from external module and select Maven
• Press next until you hit the page "Please select the project SDK"
• Press the "+" and add new "IntelliJ Platform Plugin project"
• Press next and finish
• Open the "Module Settings" and select the tab "Plug-in Deployment"
• Make sure the path to the "META-INF/plugin.xml" point to the "src/main/resources/" directory

Running the plug-in with a previous versions of IDEA

The plugin is tested with IDEA 2016.2 or newer, but if you want to try with a older version you can follow this guide

• Follow the guide build from source
• Change the attribute <idea-version since-build="162.0"/> in camel-idea-plugin/src/main/resources/META-INF/plugin.xml to match the version. please see document for build number description
• Build the source with mvn install
• The new plugin zip file camel-idea-plugin-<version>-SNAPSHOT.jar is located in camel-idea-plugin/target
• Install the plugin from disk in IDEA preferences

Running and debugging the plugin from source

After completing all steps and if everything is setup correctly, then you can launch the plugin by add a plugin run/debug configuration. To do that, go to Run → Edit Configurations…​ and add Plugin configuration.

You can also launch the plugin in debug mode where you can put breakpoints in the source code. This is very handy to debug the code and find issues. However for code changes you need to stop and start the plugin again.

Running the unit test

Running the IntelliJ unit test from maven with the community version

mvn verify

Running the IntelliJ unit test from maven with the Ultimate version

mvn verify -P ultimate

Running the test from IDEA community requires to add following settings to the run configuration VM options.

-ea -Xbootclasspath/p:../out/classes/production/boot -XX:+HeapDumpOnOutOfMemoryError -Xmx256m -XX:MaxPermSize=320m -Didea.system.path=target/test-system -Didea.home.path=target/ -Didea.config.path=target/test-config -Didea.test.group=ALL_EXCLUDE_DEFINED

For the Ultimate version no VM options is necessary

Contributing / Hacking on the code

We love contributions. And anyone is welcome to join and hack on the code. For code changes you can submit github PRs (pull requests) which anyone can review and get merged into the code base.

For people who hack more on the code, can be granted commit rights.

You should be willing to provide any code changes under the ASF license and that the code later will be donated to Apache Software Foundation to be included out of the box at Apache Camel. If you are not willing to accept this, then we are sorry, but then any code contributions cannot be accepted.

IDEA SDK and FAQ

Jetbrains provides a FAQ for the IDEA SDK which is massive and takes time to learn.

• http://www.jetbrains.org/intellij/sdk/docs/faq.html

TODOs

The plugin is not finished and therefore there is work to be done.

The issue tracker has a list of tickets with items to implement. This can be a good place to look for stuff you can help with. We have labelled the beginner tickets with beginner and help wanted.

Also we love feedback and you are welcome to log tickets about issues, ideas, etc.

Screenshots

We will post various screen shots of the plugin in the img directory which you can browse.