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@@ -6,14 +6,231 @@ Easy Rules is a simple yet powerful Java Rules Engine providing the following fe
 
  * Useful abstractions to define business rules and apply them easily using Java
 
- * Dynamic configuration of rules at runtime using JMX
+ * The ability to create composite rules from primitive ones
+
+ * Dynamic rule reconfiguration at runtime using JMX
 
 ## Documentation
 
-All documentation and tutorials about Easy rules can be found at [benas.github.com/easy-rules/][].
+### Quick introduction
+
+Most business rules can be represented by the following rule definition :
+
+ * Name : A unique rule name within a rules namespace
+
+ * Description : A brief description of the rule
+
+ * Priority : Rule priority regarding to other rules
+
+ * Conditions : Set of conditions that should be satisfied to apply the rule
+
+ * Actions : Set of actions to perform when conditions are satisfied
+
+Easy Rules provides an abstraction for each of these key points that define a business rule.
+
+### Easy Rules Key API
+
+A rule in Easy Rules is an implementation of the `Rule` interface :
+
+```java
+public interface Rule {
+
+    /**
+     * Getter for rule name.
+     * @return the rule name
+     */
+    String getName();
+
+    /**
+     * Getter for rule description.
+     * @return rule description
+     */
+    String getDescription();
+
+    /**
+     * Getter for rule priority.
+     * @return rule priority
+     */
+    int getPriority();
+
+    /**
+     * Setter for rule priority.
+     * @param priority the priority to set
+     */
+    void setPriority(int priority);
+
+    /**
+     * Setter for rule description.
+     * @param description new rule description
+     */
+    void setDescription(String description);
+
+    /**
+     * Rule conditions abstraction : this method encapsulates the rule's conditions.
+     * @return true if the rule should be applied, false else
+     */
+    boolean evaluateConditions();
+
+    /**
+     * Rule actions abstraction : this method encapsulates the rule's actions.
+     * @throws Exception thrown if an exception occurs during actions performing
+     */
+    void performActions() throws Exception;
+
+}
+```
+
+Getters and setters of `name`, `description` and `priority` attributes are self explanatory.
+
+The `evaluateConditions` method encapsulates conditions that must evaluate to TRUE to trigger the rule.
+
+The `performActions` method encapsulates actions that should be performed when rule's conditions are satisfied.
+
+Easy Rules provides a simple implementation of the `Rule` interface named `BasicRule`. This class implements most of methods
+
+defined in the `Rule` interface. To define a rule, you can extends this class and override `evaluateConditions` and
+
+`performActions` methods to provide your conditions and actions logic.
+
+Evaluating conditions and performing actions should be delegated to other objects if used across multiple rules.
+
+### Easy Rules engine
+
+Easy Rules engine handles a registry of rules with unique names. Each instance of Easy Rules engine can be seen as a separate namespace.
+Rules are applied according to their priorities. By default, lower values represent higher priorities. To override this default behavior, you can extend the `BasicRule` class
+and override `compareTo` method to provide a custom priority strategy.
+
+Easy Rules provide the following parameters:
+
+| Parameter              | Type     | Required | Default  | Description                                                      |
+|:----------------------:|:--------:|:--------:|:--------:|------------------------------------------------------------------|
+| skipOnFirstAppliedRule | boolean  | no       | false    | skip next applicable rules when a rule is applied                |
+| rulePriorityThreshold  | int      | no       | 10000    | skip next rules if priority exceeds a user defined threshold.    |
+
+### Hello World Sample
+
+This sample shows how to use Easy Rules to say Hello to only duke's friends.
+The program asks the user if he/she is a friend of duke and says Hello only if he/she responds yes!
+
+The rule class is the following :
+
+```java
+public class HelloWorldRule extends BasicRule {
+
+    /**
+     * The user input.
+     */
+    private String input;
+
+    public HelloWorldRule(String name, String description, int priority) {
+        super(name, description, priority);
+    }
+
+    @Override
+    public boolean evaluateConditions() {
+        //The rule should be applied only if the user's response is yes (duke friend)
+        return input.equalsIgnoreCase("yes");
+    }
+
+    @Override
+    public void performActions() throws Exception {
+        //When rule conditions are satisfied, prints 'Hello duke's friend!' to the console
+        System.out.println("Hello duke's friend!");
+    }
+
+    public void setInput(String input) {
+        this.input = input;
+    }
+}
+```
+
+The launcher class is the following :
+
+```java
+public class HelloWorldSampleLauncher {
+
+    public static void main(String[] args) {
+
+        Scanner scanner = new Scanner(System.in);
+        System.out.println("Are you a friend of duke? [yes/no]:");
+        String input = scanner.nextLine();
+
+        /**
+         * Define the rule
+         */
+        HelloWorldRule helloWorldRule = new HelloWorldRule("Hello World rule", "Say Hello to only duke's friends", 1);
+
+        /**
+         * Set data to operate on
+         */
+        helloWorldRule.setInput(input.trim());
+
+        /**
+         * Create a default rules engine and register the business rule
+         */
+        RulesEngine rulesEngine = new DefaultRulesEngine();
+        rulesEngine.registerRule(helloWorldRule);
+
+        /**
+         * Fire rules
+         */
+        rulesEngine.fireRules();
+
+    }
+}
+```
+
+More samples of how to use Easy Rules can be found [here][].
+
+### Composite Rules
+
+Easy Rules allows you to create complex rules from primitive ones. A `CompositeRule` is composed of a set of rules.
+
+This is typically an implementation of the composite design pattern.
+
+A composite rule is triggered if all conditions of its composing rules are satisfied.
+
+When a composite rule is applied, actions of all composing rules are performed in the natural order of
+
+rules which is rules priorities by default.
+
+### JMX Managed Rules
+
+This is the most interesting feature of Easy Rules. Being able to dynamically reconfigure business rules at runtime
+
+in production systems is a recurrent requirement. Thanks to JMX, Easy Rules can expose rules attributes to be
+
+managed via any JMX compliant client.
+
+The key API to use this feature is the `JmxManagedRule` interface which extends the `Rule` interface to add JMX
+
+monitoring and management capabilities.
+
+```java
+@javax.management.MXBean
+public interface JmxManagedRule extends Rule {
+
+}
+```
+
+Easy Rules provides a simple implementation class of this interface called `BasicJmxManagedRule`.
+
+To make your rule manageable via JMX, you can extend this class and register it in Easy Rules engine as a `JmxManagedRule`:
+
+```java
+RulesEngine rulesEngine = new DefaultRulesEngine();
+rulesEngine.registerJmxManagedRules(myJmxManagedRule);
+```
+
+By default, rule description and priority are exposed as JMX manageable attributes. If you need to expose more specific
+
+attributes, you can extend the `JmxManagedRule` interface and add getters and setters of your manageable attributes.
+
+An example of using dynamic rule reconfiguration at runtime is provided in the [order tutorial][].
 
 ## License
 Easy Rules is released under the [MIT License][].
 
-[benas.github.com/easy-rules/]: http://benas.github.com/easy-rules/
+[here]: https://github.com/benas/easy-rules/tree/master/easyrules-samples
+[order tutorial]: https://github.com/benas/easy-rules/tree/master/easyrules-samples/src/main/java/net/benas/easyrules/samples/order
 [MIT License]: http://opensource.org/licenses/mit-license.php/
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