In this tutorial, we will go over Drools Installation step by step.

Drools enable an Eclipse-based IDE, however at its core, just Java 1.5 (Java SE) is required.

A simple way to begin is to download and install the Eclipse plug-in. It also requires the Eclipse GEF framework to be installed. This enables all the dependencies to create a new rule project usually. Installing the Eclipse plug-in requires just unzipping a file into Eclipse plug-in directory.

Use of the Eclipse plug-in is not necessarily required. Rule files are usually a textual input, and the IDE is another convenience. Rule engine can be integrated into various ways, and there is no "one size fits all".

Download and install Eclipse IDE.

Install the GEF Plugin for Eclipse:

-Run Eclipse IDE.

-Select Help > Install New Software….

-In the Work with: combo box type: http://download.eclipse.org/tools/gef/updates/releases/

-Select “Graphical Editing Framework GEF”.

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Install Drools:

-Select Help > Install New Software….

-In the Work with: combo box type: http://download.jboss.org/drools/release/6.1.0.Final/org.drools.updatesite/

-Select all.

Make sure the checkbox “Contact all update sites during install to find required software” is checked.

Create Drools Runtime:

-In Eclipse switch to the Drools perspective (upper right corner).

-Select File > New > Drools project.

-Choose a name and click “Next”.

Click “Next”.

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Click “Configure Workspace Settings…”.

Click “Add…”.

Click “Create a new Drools 6 Runtime…” and choose a directory to create the Drools Runtime.

Select the created Drools Runtime and click “OK”.

Enter a GroupId, an ArtifactId, and a Version for your project. You may choose arbitrary non-empty values. Afterwards, click “Finish” to create the project.

• Open the class that contains the main method. It is located in the package com.sample and has the same name as the project.
• To execute the project, right-click the editor and selectDebug As > Drools Application. Observe the output. You can ignore the SLF4J warnings.

For an In-depth knowledge on Drools click on below:

• Drools Tutorials
• Drools Rules Engine