Merge branch 'master' of https://github.com/JonCook/tutorials

rule-engines/easy-rules/pom.xml

@@ -0,0 +1,27 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.baeldung.easyrules</groupId>
+    <artifactId>easy-rules</artifactId>
+    <version>1.0</version>
+    <name>easy-rules</name>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+        <relativePath>../..</relativePath>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.jeasy</groupId>
+            <artifactId>easy-rules-core</artifactId>
+            <version>${easy-rules.version}</version>
+        </dependency>
+    </dependencies>
+
+    <properties>
+        <easy-rules.version>3.0.0</easy-rules.version>
+    </properties>
+</project>

rule-engines/easy-rules/src/main/java/com/baeldung/easyrules/HelloWorldRule.java

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+package com.baeldung.easyrules;
+
+import org.jeasy.rules.annotation.Action;
+import org.jeasy.rules.annotation.Condition;
+import org.jeasy.rules.annotation.Rule;
+
+@Rule(name = "Hello World rule", description = "Always say hello world")
+public class HelloWorldRule {
+
+    @Condition
+    public boolean when() {
+        return true;
+    }
+
+    @Action
+    public void then() throws Exception {
+        System.out.println("hello world");
+    }
+
+}

rule-engines/easy-rules/src/main/java/com/baeldung/easyrules/Launcher.java

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+package com.baeldung.easyrules;
+
+import org.jeasy.rules.api.Facts;
+import org.jeasy.rules.api.Rules;
+import org.jeasy.rules.api.RulesEngine;
+import org.jeasy.rules.core.DefaultRulesEngine;
+
+public class Launcher {
+    public static void main(String... args) {
+        // create facts
+        Facts facts = new Facts();
+
+        // create rules
+        Rules rules = new Rules();
+        rules.register(new HelloWorldRule());
+
+        // create a rules engine and fire rules on known facts
+        RulesEngine rulesEngine = new DefaultRulesEngine();
+        rulesEngine.fire(rules, facts);
+    }
+}

rule-engines/easy-rules/src/main/resources/logback.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>