Mule ESB 入门,最简单的Hello实例

这是一个最简单的mule esb入门实例,其中用了 flow ,endpoint ,transformer,component 这些组件,这些组件的配置也是最简单配置.

情景:

1.在浏览器地址栏输入http://localhost:9090/hello-mule?name=oliver&age=20,会返回"Hello oliver,your age is 10".

1.在浏览器地址栏输入http://localhost:9090/love-mule?name=oliver&age=20,会返回"Love oliver,your age is 10".

配置文件:

<?xml version="1.0" encoding="UTF-8"?><mule xmlns="http://www.mulesoft.org/schema/mule/core"      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"      xmlns:spring="http://www.springframework.org/schema/beans"      xmlns:http="http://www.mulesoft.org/schema/mule/http"      xmlns:vm="http://www.mulesoft.org/schema/mule/vm"      xsi:schemaLocation="        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd        http://www.mulesoft.org/schema/mule/core http://www.mulesoft.org/schema/mule/core/3.2/mule.xsd        http://www.mulesoft.org/schema/mule/http http://www.mulesoft.org/schema/mule/http/3.2/mule-http.xsd        http://www.mulesoft.org/schema/mule/vm http://www.mulesoft.org/schema/mule/vm/3.2/mule-vm.xsd"> <!-- 将客户端传过来的Http数据转化成Person对象 --> <custom-transformer name="HttpDataToPersonTransformer" class="com.mule.transformer.HttpDataToPersonTransformer"/>  <!-- 将service操作结果用Html语言封装起来 --> <custom-transformer name="StringToHtmlTransformer" class="com.mule.transformer.StringToHtmlTransformer"/>  <!-- 设置相应内容为text/html格式 --> <message-properties-transformer name="setHtmlContentType" overwrite="true">        <add-message-property key="Content-Type" value="text/html" />        <!-- Tomcat lowercases headers, need to drop this old one too -->        <delete-message-property key="content-type" />    </message-properties-transformer>  <!-- 根据客户端传过来的内容,返回相应的Hello语句 --> <flow name="hello"> <inbound-endpoint address="http://localhost:9090/hello-mule?method=sayHello" exchange-pattern="request-response" > <transformer ref="HttpDataToPersonTransformer"/> <response> <transformer ref="StringToHtmlTransformer"/> <transformer ref="setHtmlContentType"/> </response> </inbound-endpoint>  <component class="com.mule.component.WelcomService"/>  </flow>  <!-- 根绝客户端传过来的内容,返回相应的Love语句 --> <flow name="love"> <inbound-endpoint address="http://localhost:9090/love-mule?method=sayLove" exchange-pattern="request-response" > <transformer ref="HttpDataToPersonTransformer"/> <response> <transformer ref="StringToHtmlTransformer"/> <transformer ref="setHtmlContentType"/> </response> </inbound-endpoint>  <component class="com.mule.component.WelcomService"/>  </flow></mule>

Transformer:

1.HttpDataToperson 将客户端传过来的http数据转换成component所需要Person类型

package com.mule.transformer;import org.mule.api.MuleMessage;import org.mule.api.transformer.TransformerException;import org.mule.transformer.AbstractMessageTransformer;import com.mule.domain.Person;public class HttpDataToPersonTransformer extends AbstractMessageTransformer {@Overridepublic Object transformMessage(MuleMessage message, String outputEncoding)throws TransformerException {String name = message.getInboundProperty("name");String age = message.getInboundProperty("age");if( age == null ) {age = "10";}return new Person(name,Integer.parseInt(age));}}

2.StringToHtmlTransformer 将component处理后返回的string类型数据,封装成html数据

package com.mule.transformer;import org.mule.api.transformer.TransformerException;import org.mule.transformer.AbstractTransformer;import com.mule.util.HtmlTemplateUtil;public class StringToHtmlTransformer extends AbstractTransformer {@Overrideprotected Object doTransform(Object src, String enc)throws TransformerException {String str = (String)src;return HtmlTemplateUtil.getSimpleHtml(str);}}

Component:

WelcomService 返回欢迎内容

package com.mule.component;import com.mule.domain.Person;public class WelcomService {public String sayHello( Person person ){return " Hello "+person.getName()+", your age is "+person.getAge();}public String sayLove( Person person ){return " Love you "+person.getName()+", your age is "+person.getAge();}}

Person类 : 

package com.mule.domain;public class Person {private String name;private int age;public Person(){}public Person(String name,int age ){this.name = name;this.age = age;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}}

HtmlTemplateUtil 工具类:用html语句封转给定的text

package com.mule.util;public class HtmlTemplateUtil {public static String getSimpleHtml( String text ){String output = "";                output += "<html>";        output += "<head>";        output += "<meta http-equiv=\"Content-Language\" content=\"en-us\"/>";        output += "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=windows-1252\"/>";        output += "<title>Bookstore Administration Console</title>";        output += "</head>";        output += "<body link=\"#FFFFFF\" vlink=\"#FFFFFF\" alink=\"#FFFFFF\" bgcolor=\"#990000\" text=\"#FFFFFF\">";                    output += text;                    output += "</body>";        output += "<br/><a href=\"/bookstore-admin/\">Return to Home Page</a>";        output += "</html>";                return output;}}