Question

我正在尝试创建一个事务单元，它发送一个RESTful HTTP帖子并将这些数据插入表中。

虽然我有一个本地序列的onError处理程序，但是当我禁用与我的端点的连接时，而不是使'send'中介失败会使端点处于SUSPENDED状态。然后它继续跳过发送并仅插入数据。此外，我的自定义failureSequence抱怨我不在交易中，即使它是在'我'调用<transaction action="new"/>

之后调用的

虽然我已阅读文档并了解进入SUSPEND是失败端点的默认行为，但我实际上需要更多控制权。我想在失败时触发自己的序列（或接收一些特定的HTTP响应代码）并调用<transaction action="rollback"/>

为清楚起见，我序列的相关部分如下：

<sequence xmlns="http://ws.apache.org/ns/synapse" name="csvToDatabaseRollback">
   <log level="custom">
      <property name="text" value="Rolling back transaction"/>
   </log>
   <transaction action="rollback"/>
   <!-- rollback any other state, here -->
</sequence>

<sequence xmlns="http://ws.apache.org/ns/synapse" name="csvRow2Pc" onError="csvToDatabaseRollback">
   <transaction action="new"/>
   <log level="full">
      <property name="State" value="Iteration"/>
   </log>
   <property name="HTTP_METHOD" value="POST" scope="axis2" type="STRING"/>
   <log level="custom">
      <property name="text" value="Calling rest-endpoint"/>
   </log>
   <send>
      <endpoint>
         <address uri="http://localhost:80/spotify" format="pox"/>
      </endpoint>
   </send>
   <log level="custom">
      <property name="text" value="After HTTP POST"/>
   </log>
   <dbreport useTransaction="true">
      <connection>
        ....
      </connection>
      <statement>
         <sql>
            <![CDATA[   insert into file values (?, ?, ?)]]></sql>                                                                                                                                                                                                                                 
            <parameter xmlns:ns2="http://org.apache.synapse/xsd" xmlns:ns="http://org.apache.synapse/xsd" xmlns:sec="http://secservice.samples.esb.wso2.org" expression="//line/col_one/text()" type="VARCHAR"/>
            <parameter xmlns:ns2="http://org.apache.synapse/xsd" xmlns:ns="http://org.apache.synapse/xsd" xmlns:sec="http://secservice.samples.esb.wso2.org" expression="//line/col_two/text()" type="VARCHAR"/>
            <parameter xmlns:ns2="http://org.apache.synapse/xsd" xmlns:ns="http://org.apache.synapse/xsd" xmlns:sec="http://secservice.samples.esb.wso2.org" expression="//line/col_three/text()" type="VARCHAR"/>
         </statement>
      </dbreport>
      <log level="custom">
         <property name="text" value="Before tx commit"/>
      </log>
      <transaction action="commit"/>
</sequence>

日志包含：

[2013-10-25 15:09:40,117]  WARN - ConnectCallback Connection refused or failed for :   localhost/127.0.0.1:80
[2013-10-25 15:09:40,116]  INFO - LogMediator text = After HTTP POST
[2013-10-25 15:09:40,129]  INFO - LogMediator text = Rolling back transaction
[2013-10-25 15:09:40,129]  WARN - EndpointContext Suspending endpoint :   endpoint_f2e0b5550f82db317194145cb24b59f38a63ab610d8a994c - last suspend duration was :   30000ms and current suspend duration is : 30000ms - Next retry after : Fri Oct 25 15:10:10 NZDT 2013
[2013-10-25 15:09:40,121]  INFO - LogMediator text = Before tx commit
[2013-10-25 15:09:40,131]  INFO - LogMediator text = Rolling back transaction
[2013-10-25 15:09:40,131] ERROR - TransactionMediator Unable to rollback transaction
java.lang.IllegalStateException: This method needs a transaction for the calling thread    and none exists.
Possible causes: either you didn't start a transaction,
it rolledback due to timeout, or it was committed already.
ACTIONS: You can try one of the following: 
1. Make sure you started a transaction for the thread.

如果我检查数据库，则已提交行。随后的尝试很快就会跳过“发送”中介，因为它已被暂停。

理想情况下，我想发送HTTP POST，并根据REST响应而不是挂起来设置自定义路由规则。我怎么能这样做？

Answer 1

当端点被挂起时，esb将调用faultsequence。在故障序列中，您可以调用任何序列。因此，它可以让您控制自定义代码。

POX / Rest端点+数据库插入的两阶段提交

1 个答案: