ESB WSO2 使用丰富、迭代和过滤中介器将属性添加到 XML 文件中

Question

我想将带有这样的 xml 文件的 Postman 请求发送到我的 api：

<data>
    <user>
        <name>Andrei</name>
        <adress>Tudor Vladimirescu, nr2</adress>
        <cnp>123456789</cnp>
        <age>22</age>
    </user>
    <user>
        <name>Ana</name>
        <adress>Str. Pacurari, nr1</adress>
        <cnp>123456789</cnp>
        <age>26</age>
    </user>
    <user>
        <name>Andreea</name>
        <adress>Tudor Vladimirescu, nr1</adress>
        <cnp>123456789</cnp>
        <age>20</age>
    </user>
</data>

我想向每个 添加一个 Yes/No 标签; 基于年龄。例如：如果年龄超过 23 岁，则 valid 标签的值应为 Yes。我想将修改后的消息发送到另一个 API。 我知道我应该使用丰富、迭代和过滤中介器，但我确实需要一些帮助，因为我是初学者。谢谢你！

Answer 1

我使用了 Iterate 中介器，因为您需要后端调用和 filter 中介器用于设置每个元素的年龄是否有效，最后使用 enrich 中介器实现您的用例。

<!-- iteration of incoming user data -->
            <iterate expression="//data/user" id="iterateuser" sequential="true">
                <target>
                    <sequence>
                        <property expression="//age/text()" name="age" scope="default" type="STRING"/>
                         <log level="custom">
                <property name="Inside Iterator" value="is called*****"/>
                <property expression="get-property('age')" name="age"/>
            </log>
             <!-- fiter to find valid age  or not-->
                        <filter xpath="get-property('age')>='23'">
                            <then>
                                <property name="valid" scope="default" type="STRING" value="Yes"/>
                            </then>
                            <else>
                                <property name="valid" scope="default" type="STRING" value="No"/>
                            </else>
                        </filter>
                         <!-- enrich to add valid tag to existing payload-->
                        <enrich>
                            <source clone="true" type="inline">
                                <valid xmlns=""/>
                            </source>
                            <target action="child" xmlns:ns="http://www.wso2.org/types" xpath="//user"/>
                        </enrich>
                        <!-- enrich to add valid property value with validtag-->
                        <enrich>
                            <source clone="true" property="valid" type="property"/>
                            <target xpath="//valid"/>
                        </enrich>
                        <log level="full"/>
                        <!-- make an external endpoint call here -->
                    </sequence>
                </target>
            </iterate>

输入：

<data>
    <user>
        <name>Andrei</name>
        <adress>Tudor Vladimirescu, nr2</adress>
        <cnp>123456789</cnp>
        <age>22</age>
    </user>
    <user>
        <name>Ana</name>
        <adress>Str. Pacurari, nr1</adress>
        <cnp>123456789</cnp>
        <age>26</age>
    </user>
    <user>
        <name>Andreea</name>
        <adress>Tudor Vladimirescu, nr1</adress>
        <cnp>123456789</cnp>
        <age>20</age>
    </user>
</data>

迭代日志：

[2022-03-15 12:27:23,032]  INFO {org.apache.synapse.mediators.builtin.LogMediator} - Inside Iterator = is called*****, age = 22
[2022-03-15 12:27:23,032]  INFO {org.apache.synapse.mediators.builtin.LogMediator} - To: /enrichapi, MessageID: urn:uuid:8101fdcc-0a29-4bea-a8f1-b8ad80f0c6ff, Direction: request, Envelope: <?xml version='1.0' encoding='utf-8'?><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"><soapenv:Body><user>
        <name>Andrei</name>
        <adress>Tudor Vladimirescu, nr2</adress>
        <cnp>123456789</cnp>
        <age>22</age>
    <valid>No</valid></user></soapenv:Body></soapenv:Envelope>
[2022-03-15 12:27:23,032]  INFO {org.apache.synapse.mediators.builtin.LogMediator} - Inside Iterator = is called*****, age = 26
[2022-03-15 12:27:23,040]  INFO {org.apache.synapse.mediators.builtin.LogMediator} - To: /enrichapi, MessageID: urn:uuid:b01f8b29-9fe5-43e6-a0ed-0a61d395fd1a, Direction: request, Envelope: <?xml version='1.0' encoding='utf-8'?><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"><soapenv:Body><user>
        <name>Ana</name>
        <adress>Str. Pacurari, nr1</adress>
        <cnp>123456789</cnp>
        <age>26</age>
    <valid>Yes</valid></user></soapenv:Body></soapenv:Envelope>
[2022-03-15 12:27:23,053]  INFO {org.apache.synapse.mediators.builtin.LogMediator} - Inside Iterator = is called*****, age = 20
[2022-03-15 12:27:23,053]  INFO {org.apache.synapse.mediators.builtin.LogMediator} - To: /enrichapi, MessageID: urn:uuid:1feeb723-8a72-475a-b014-cda2e7b7a90a, Direction: request, Envelope: <?xml version='1.0' encoding='utf-8'?><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"><soapenv:Body><user>
        <name>Andreea</name>
        <adress>Tudor Vladimirescu, nr1</adress>
        <cnp>123456789</cnp>
        <age>20</age>
    <valid>No</valid></user></soapenv:Body></soapenv:Envelope>

如果您注意到上面的日志 No 或 Yes 已添加到有效负载中。

发布此内容后，您可以在迭代器内进行外部端点调用。

参考：
丰富中介