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:

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<?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

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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 {

@Override
public 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

[java]
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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 {

@Override
protected Object doTransform(Object src, String enc)
throws TransformerException {
String str = (String)src;

return HtmlTemplateUtil.getSimpleHtml(str);
}

}

Component:
WelcomService 返回欢迎内容

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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 :

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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;
}

}

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HtmlTemplateUtil 工具类:用html语句封转给定的text

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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;
}

}