亲爱的大家，在第一个新年快乐。
我的目标如下：
我在wso2as中部署了两个axis2 Web服务（ws1，ws2）。客户端必须通过wso2esb将参数提供给ws1，并且必须将返回的值提供给ws2作为将最终值返回给客户端的参数。因此，客户端所做的只是将参数提供给ws1，并从ws2接收最终响应。
题：
如何逐步执行该步骤，并使ws1和ws2进行通信（我认为这是通过代理进行的）？因为我尝试了许多tuto，但没人能详细说明我对ESB的初衷。
非常感谢。
最佳答案
是。您可以一步一步完成。我之前在一个项目中做到过：
您可以按照以下步骤操作：
1. ws1 and ws2 are both have "endpoints" defined in the ESB.
2. In the ws1 proxy, define a target inSequence to point to a "sequence"
for example "ws1InSequence"
3. In the "ws1InSequence", you can use <filter> to make sure the value is exists.
Then you can <send> to the ws1 <endpoint> with "receive" attribute point to
a sequence for example "ws1ResultSequence"
4. In the ws1ResultSequence, you can again use the <filter> to make sure
it has the parameter/value you need. Then you can use param/value to format a request message.
<payloadFactory>
<format>
<ns1: ws2Operation
xmlns:ns1="ws2Namespace">
<element1 xmlns="">$1</element1>
<!-- Note $1 will have the //paramName value from the ws1 Result message -->
<element2 xmlns="">$2</element2>
<!-- Note $2 will have the //paramName2 value from the ws1 Result message -->
</format>
<args>
<arg expression="//paramName" />
<arg expression="//paramName2" />
</args>
</payloadFactory>
5. Still in ws1ResultSequence, after you create the request message,
you <send> it to the ws2 proxy. Then in the ws2 proxy, in the <outSequence>
you can juse use <send/> to send the response to the client.
请注意，您可能需要包括exception（faultSequence）处理。
WSO2ESB使用Apache Synapse进行配置。您可以在其文档中找到大多数语法和示例用法：http://synapse.apache.org/userguide/config.html
更新：您可以以此为例。注意，这可能不是您需要的完整代码，并且可能需要添加异常处理。
<sequence xmlns="http://ws.apache.org/ns/synapse" name="ws1ResultSequence"
trace="enable" onError="ws1ResultSequenceErrorHandler">
<log level="custom">
<property name="sequence" value="INVOCATION START: ws1ResultSequence" />
</log>
<!-- record the original message for future reference -->
<enrich>
<source clone="true" type="envelope" />
<target action="replace" type="property" property="ORIGINAL" />
</enrich>
<!-- Check if the ws1 result message has the value -->
<property
xmlns:ns1="ws1Namespace"
name="valueExists" expression="//ns1:element1" />
<!--Note here, element1 is the element name which has the value: output1 -->
<filter xpath="fn:boolean( get-property('valueExists') )">
<then>
<!-- create the request message to invoke ws2 -->
<payloadFactory>
<format>
<ns1:ws2OperationName
xmlns:ns1="ws2Namespace">
<element2 xmlns="">$1</element2>
</ns1:ws2OperationName>
</format>
<args>
<arg expression="//ns1:element1" />
</args>
</payloadFactory>
<log level="custom">
<property name="inInvokeWS2" value="INVOCATION START: value from ws1 result exists" />
</log>
<send>
<endpoint key="ws2Sequence" />
</send>
<drop/>
</then>
</filter>
<!-- No result value found from the ws1 result message -->
<send>
<endpoint key="DoSomethingElseOrThrowError" />
</send>
关于java - wso2esb＆wso2as-两个Web服务的链接或编排，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/14131335/