Mule4 blog post

AccessAnimalBean.xml

		<ee:transform doc:name="Transform Message">
			<ee:message >
				<ee:set-payload ><![CDATA[%dw 2.0
output application/json
---
app.registry.defaultAnimal]]></ee:set-payload>
			</ee:message>
		</ee:transform>

Animal.java

package com.ricston.test;

public class Animal implements java.io.Serializable {
	
	private static final long serialVersionUID = 2828474494822L;
	
	private String name;

	public Animal(){
		name="maxMule";
	}
	
	public Animal(String name){
		this.name=name;
	}
	
	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}
	
	public String displayInfo(String info){
		return  new StringBuilder(this.name).append(" : ").append(info).toString();
	}

	@Override
	public String toString() {
		return "Animal [name=" + name + "]";
	}
}

AnimalBean.xml

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.1.xsd">

      <bean id="defaultAnimal" class="com.ricston.test.Animal">
          <property name="name" value="sima" />
      </bean>
</beans>

AnimalBeanConfig.xml

<spring:config name="animalBean" doc:name="animalBean" files="AnimalBean.xml" />

callJavaModialViaDw.xml

		<ee:transform doc:name="Transform Message">
			<ee:message >
				<ee:set-payload ><![CDATA[%dw 2.0
fun createAnimal(name) =
{
	name: name
} as Object {class: "com.ricston.test.Animal"}

output application/json
---
do {
	var localAnimal = createAnimal('treyu')
    var info = Java::invoke(
		"com.ricston.test.Animal",
		"displayInfo(String)", 
		localAnimal, 
		{info: "is a dog"} )
	---
	{
		animalLocal: localAnimal,
		info: info
	}
}]]></ee:set-payload>
			</ee:message>
		</ee:transform>

callMethodOfAnInstance.xml

<java:new doc:name="New Default Instance" doc:id="61265612-0824-47c6-ba46-4233d01cfe97" class="com.ricston.test.Animal" constructor="Animal()" target="animalInstance"/>
<java:invoke doc:name="Invoke" doc:id="15998db1-d486-4499-bf3a-5d166fd86cf1" instance="#[vars.animalInstance]" class="com.ricston.test.Animal" method="setName(String)">
  <java:args ><![CDATA[#[{name: attributes.uriParams.name}]]]></java:args>
</java:invoke>

ImportInDw.xml

<ee:transform doc:name="Transform Message">
  <ee:message >
    <ee:set-payload ><![CDATA[%dw 2.0
      import java!com::ricston::test::TestUtils
      output application/json
      ---
      {message: TestUtils::returnTestMessage()}]]></ee:set-payload>
  </ee:message>
</ee:transform>

InvokeStatic.xml

<java:invoke-static doc:name="Invoke static" class="com.ricston.test.TestUtils" method="returnTestMessage()"/>

NewInstance.xml

<java:new doc:name="New" class="com.ricston.test.Animal" constructor="Animal()"/>

NewInstanceWithArg.xml

<java:new doc:name="New" class="com.ricston.test.Animal" constructor="Animal(String)">
  <java:args ><![CDATA[#[{arg0: attributes.uriParams.name}]]]></java:args>
</java:new>

NewInstanceWithArgName.xml

<java:new doc:name="New" class="com.ricston.test.Animal" constructor="Animal(String)">
  <java:args ><![CDATA[#[{name: attributes.uriParams.name}]]]></java:args>
</java:new>

pom-compiler-plugin.xml

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-compiler-plugin</artifactId>
  <version>3.8.0</version>
  <configuration>
    <source>1.8</source>
    <target>1.8</target>
    <parameters>true</parameters>
  </configuration>
</plugin>

TestUtils.java

package com.ricston.test;
public class TestUtils {
	public static String returnTestMessage() {
		return "I feel I am being tested";
	}
}