Retry

ActiveVOS Server User’s Guide

This policy describes when and how many times to retry an invoked service that does not reply.

During process execution, an invoked service may not reply, and you can specify how you want to handle the faulting execution.

You may specify the relatively simple policy that the server automatically retries the invocation a certain number of times.

Alternately, you can create a BPEL process to handle retries. For details, see Retry-Policy Service.

Retry attributes include:

Assertion parameter	Description	Default
attempts	Number of times to retry the service	None. You must add a value. Ignored if a service name is specified.
interval	Amount of time in seconds to wait between retries	None. You must add a value. Ignored if a service name is specified.
service	Name of a service implemented by the process. The service is a BPEL process based on a required WSDL operation.	If you specify a service, the attempts and interval values are ignored.
faultList	Faults to include for retries	All faults are retried
faultExclusionList	Faults to exclude for retries
On Failure	The state for an invoke activity when the retries are exhausted: Faulting (the default) or Suspended.	Fault

XML Syntax

<abp:retryPolicy attempts="xsd:int"? interval="xsd:int"?

service="NCName"? faultList="QNameList"?

faultExclusionList="QNameList"? />

Examples

Policy with a service and fault list

<wsa:EndpointReference

    xmlns:s="http://www.activebpel.org/services/retrytests">

  <wsa:ServiceName PortName=”retrytesterServicePort”>

    s:retryTesterService</wsa:ServiceName>

  <wsa:Metadata>

   <wsp:Policy

    xmlns:wsp=”http://schemas.xmlsoap.org/ws/2004/09/policy”

    xmlns:abp=”http://schemas.active-endpoints.com/ws/

      2005/12/policy”>

    <abp:retry service=”retryCheckerService>

     faultList="{http://xml.apache.org/axis/}*

        {http://www.active-endpoints.com/2004/06/bpel

           /extensions/}*

        {http://www.activebpel.org/services

           /retrytests}*"/>

   </wsp:Policy>

  </wsa:Metadata>

</wsa:EndpointReference>

Policy with attempts and fault exclusion list

<wsa:EndpointReference

    xmlns:s="http://www.activebpel.org/services/retrytests">

  <wsa:ServiceName PortName=”retrytesterServicePort”>

    s:retryTesterService</wsa:ServiceName>

  <wsa:Metadata>

   <wsp:Policy

    xmlns:wsp=”http://schemas.xmlsoap.org/ws/2004/09/policy”

    xmlns:abp=”http://schemas.active-endpoints.com/ws/

      2005/12/policy”>

   <abp:retry interval=”1” attempts=”3”>

     faultExclusionList="{http://xml.apache.org/axis/}*"/>

   </wsp:Policy>

  </wsa:Metadata>

</wsa:EndpointReference>