Get counter from iterator mediator WSO2 ESB

Question

有没有办法以某种计数器的值来计算WSO2 ESB迭代器调解器迭代了多少时间？

Answer 1

There is as many iteration as xml fragments given by the xpath expression you've defined inside iterate mediator and you can use xpath function "count" to find this value, exemple :

message :

<root>
  <value>
    ...
  </value>
  <value>
    ...
  </value>
</root>

Mediation :

<iterate expression="//value">
   <target>
     ...
   </target>
</iterate>

XPATH giving the number of iteration : count(//value)

Internally, a property "messageSequence" or "messageSequence.ID" (where ID is the value of the iterate mediator's optional id attribute) is initialized with such a counter (it give you something like 0/2 and 1/2 with my sample) but I'm not sure you should use that...