apache synapse使用（2）

接着上面看官方的示例

消息中介示例

1，本地注册项，可重复使用的端点和序列

<!-- Local Registry entry definitions, reusable endpoints and sequences -->
<definitions xmlns="http://ws.apache.org/ns/synapse"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://ws.apache.org/ns/synapse http://synapse.apache.org/ns/2010/04/configuration/synapse_config.xsd">
    <!-- define a string resource entry to the local registry -->
    <localEntry key="version">0.1</localEntry>
    <!-- define a reuseable endpoint definition -->
    <endpoint name="simple">
        <address uri="http://localhost:9000/services/SimpleStockQuoteService"/>
    </endpoint>

    <!-- define a reusable sequence -->
    <sequence name="stockquote">
        <!-- log the message using the custom log level. illustrates custom properties for log -->
        <log level="custom">
            <property name="Text" value="Sending quote request"/>
            <property name="version" expression="get-property('version')"/>
            <property name="direction" expression="get-property('direction')"/>
        </log>
        <!-- send message to real endpoint referenced by key "simple" endpoint definition -->
        <send>
            <endpoint key="simple"/>
        </send>
    </sequence>

    <sequence name="main">
        <in>
            <property name="direction" value="incoming"/>
            <sequence key="stockquote"/>
        </in>
        <out>
            <send/>
        </out>
    </sequence>
</definitions>

客户端执行

ant stockquote -Daddurl=http://localhost:9000/services/SimpleStockQuoteService -Dtrpurl=http://localhost:8280/

 可以看到输出的结果

 Standard :: Stock price = $80.1611906447455

过程是先进入main然后直接进入可重用序列stockqnote，最后将请求的信息发送到http://localhost:9000/services/SimpleStockQuoteService

使用http://localhost:9000/services/SimpleStockQuoteService?wsdl可以看到显示的结果

2，错误处理

<definitions xmlns="http://ws.apache.org/ns/synapse"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://ws.apache.org/ns/synapse http://synapse.apache.org/ns/2010/04/configuration/synapse_config.xsd">

    <!-- the default fault handling sequence used by Synapse - named 'fault' -->
    <sequence name="fault">
        <log level="custom">
            <property name="text" value="An unexpected error occured"/>
            <property name="message" expression="get-property('ERROR_MESSAGE')"/>
        </log>
        <drop/>
    </sequence>

    <sequence name="sunErrorHandler">
        <log level="custom">
            <property name="text" value="An unexpected error occured for stock SUN"/>
            <property name="message" expression="get-property('ERROR_MESSAGE')"/>
            <!--<property name="detail" expression="get-property('ERROR_DETAIL')"/>-->
        </log>
        <drop/>
    </sequence>

    <sequence name="main">
        <in>
            <switch xmlns:m0="http://services.samples" source="//m0:getQuote/m0:request/m0:symbol">
                <case regex="IBM">
                    <send>
                        <endpoint>
                            <address uri="http://localhost:9000/services/SimpleStockQuoteService"/>
                        </endpoint>
                    </send>
                </case>
                <case regex="MSFT">
                    <send>
                        <endpoint key="bogus"/>
                    </send>
                </case>
                <case regex="SUN">
                    <sequence key="sunSequence"/>
                </case>
            </switch>
            <drop/>
        </in>

        <out>
            <send/>
        </out>
    </sequence>

    <sequence name="sunSequence" onError="sunErrorHandler">
        <send>
            <endpoint key="sunPort"/>
        </send>
    </sequence>

</definitions>

 客户端执行

ant stockquote -Daddurl=http://localhost:9000/services/SimpleStockQuoteService -Dtrpurl=http://localhost:8280/ -Dsymbol=MSFT

执行查询MSFT的股价，因为没有对应的端点查找最接近的错误处理，服务端看到提示

INFO LogMediator text = An unexpected error occured, message = Couldn't find the endpoint with the key : bogus

执行查看sun的股价

ant stockquote -Daddurl=http://localhost:9000/services/SimpleStockQuoteService -Dtrpurl=http://localhost:8280/ -Dsymbol=SUN

最后打印出信息

INFO LogMediator text = An unexpected error occured for stock SUN, message = Couldn't find the endpoint with the key : sunPort

这个是在sunSeqence这个序列里执行的。

3，创建错误的SOAP信息并且变化消息的方向

<!-- Creating SOAP fault messages and changing the direction of a message -->
<definitions xmlns="http://ws.apache.org/ns/synapse"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://ws.apache.org/ns/synapse http://synapse.apache.org/ns/2010/04/configuration/synapse_config.xsd">

    <sequence name="myFaultHandler">
        <makefault response="true">
			<code xmlns:tns="http://www.w3.org/2003/05/soap-envelope" value="tns:Receiver"/>
            <reason expression="get-property('ERROR_MESSAGE')"/>
        </makefault>
        <send/>
    </sequence>

    <sequence name="main" onError="myFaultHandler">
        <in>
            <switch xmlns:m0="http://services.samples" source="//m0:getQuote/m0:request/m0:symbol">
                <case regex="MSFT">
                    <send>
                        <endpoint>
                            <address uri="http://bogus:9000/services/NonExistentStockQuoteService"/>
                        </endpoint>
                    </send>
                </case>
                <case regex="SUN">
                    <send>
                        <endpoint>
                            <address uri="http://localhost:9009/services/NonExistentStockQuoteService"/>
                        </endpoint>
                    </send>
                </case>
            </switch>
            <drop/>
        </in>

        <out>
            <send/>
        </out>
    </sequence>

</definitions>

 客户端调用

ant stockquote -Daddurl=http://localhost:9000/services/SimpleStockQuoteService -Dtrpurl=http://localhost:8280/ -Dsymbol=MSFT

 返回

<soapenv:Fault xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"><faultcode>soapenv:Client</faultcode> <faultstring>java.net.UnknownHostException: bogus</faultstring><detail /></soapenv:Fault>

执行

ant stockquote -Daddurl=http://localhost:9000/services/SimpleStockQuoteService -Dtrpurl=http://localhost:8280/ -Dsymbol=SUN

返回

<soapenv:Fault xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"><faultcode>soapenv:Client</faultcode> <faultstring>java.net.ConnectException: Connection refused</faultstring><detail /></soapenv:Fault>

4，操纵SOAP协议头，修改传入或传出的消息

<!-- Manipulating SOAP headers, and filtering incoming and outgoing messages -->
<definitions xmlns="http://ws.apache.org/ns/synapse"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://ws.apache.org/ns/synapse http://synapse.apache.org/ns/2010/04/configuration/synapse_config.xsd">

    <sequence name="main">
        <in>
            <header name="To" value="http://localhost:9000/services/SimpleStockQuoteService"/>
        </in>
        <send/>
    </sequence>

</definitions>

 修改协议头

客户端调用

ant stockquote -Dtrpurl=http://localhost:8280/

直接指向

http://localhost:9000/services/SimpleStockQuoteService