rest - REST API : Issues using Aggregate and Iterate Mediator

Question

Error Message: [2013-06-04 11:26:41,039] INFO - LogMediator To: http://www.w3.org/2005/08/addressing/anonymous, WSAction: , SOAPAction: , MessageID: urn:uuid:fce9fc4f-a071-4f62-8b5f-e982cf404619, Direction: response, Envelope: Not in GZIP format [2013-06-04 11:26:41,055] ERROR - AggregateMediator Error evaluating expression: /PACKAGE_OFFERS org.apache.synapse.SynapseException: Could not find matching elements to aggregate. at org.apache.synapse.mediators.eip.EIPUtils.enrichEnvelope(EIPUtils.java:149) at org.apache.synapse.mediators.eip.aggregator.AggregateMediator.getAggregatedMessage(AggregateMediator.java:393) at org.apache.synapse.mediators.eip.aggregator.AggregateMediator.completeAggregate(AggregateMediator.java:340) at org.apache.synapse.mediators.eip.aggregator.AggregateMediator.mediate(AggregateMediator.java:285) at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:71) at org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:114) at org.apache.synapse.rest.Resource.process(Resource.java:297) at org.apache.synapse.rest.API.process(API.java:265) at org.apache.synapse.rest.RESTRequestHandler.dispatchToAPI(RESTRequestHandler.java:76) at org.apache.synapse.rest.RESTRequestHandler.process(RESTRequestHandler.java:50) at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2SynapseEnvironment.java:182) at org.apache.synapse.core.axis2.SynapseCallbackReceiver.handleMessage(SynapseCallbackReceiver.java:443) at org.apache.synapse.core.axis2.SynapseCallbackReceiver.receive(SynapseCallbackReceiver.java:166) at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180) at org.apache.synapse.transport.passthru.ClientWorker.run(ClientWorker.java:217) at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:172) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:722) [2013-06-04 11:27:21,022] WARN - SourceHandler Connection time out after request is read: fe80:0:0:0:b1ac:716:923:abd3%33:61567->fe80:0:0:0:b1ac:716:923:abd3%33:8280

I have a REST API calling two DataServer Services DS-1 and and DS-2 ,after calling DS-1[XML over REST-GET],I perform an iteration over some repetitive elements and call DS-2[XML over REST-GET].On doing this I get the above listed Error. I am trying to fetch the right element. Please let me know if any additional configurations are required.

For Source Code Please Refer this LINK.

Answer 1

您可以尝试<send/>在关闭之前添加调解器，<inSequence>如下所述。

            </case>
            <default/>
        </switch>
**<send/>**
    </inSequence>

这将确保 outSequence 收到您的请求。

Answer 2

您使用接收序列。因此，第一个端点的结果（响应）将按该序列接收（即：迭代序列）。之后没有接收序列。消息流中断。您在初始序列中使用了聚合，这没有任何意义，因为来自第一个端点的响应将在 iterate-seq 接收。

因此，聚合将针对您发送到 API 的初始请求进行。

Answer 3

如果您还没有决定使用任何 esb……请考虑 UltraESB