RANADEEP SHARMA created CXF-7663:
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Summary: Programmatic approach for CIrcuit-Breaker feature is not
working
Key: CXF-7663
URL: https://issues.apache.org/jira/browse/CXF-7663
Project: CXF
Issue Type: Bug
Components: JAX-RS
Affects Versions: 3.2.1
Environment: * which version of the software - Apache CXF 3.2.1
* what platform and JDK - Tomcat 7, JDK 1.8.0_131
Reporter: RANADEEP SHARMA
Attachments:
Reason_UnableToOpenCircuit_WebClient_ProgramaticApproach.png
As per the documentation -
[https://cwiki.apache.org/confluence/display/CXF20DOC/JAX-RS+Failover#JAX-RSFailover-Code.1],
I tried running the following code along with associated configurations, but
the circuit breaker mechanism is not opening up once the threshold count for
connectivity failures have exceeded. As the circuit stays closed, the
invocation attempts are still being accepted which is against expected
behaviour.
{code:java}
public class CustomerRestClientFactory implements InitializingBean {
private List providerList; // Value is injected by Spring
private String serviceUrl; // Value is injected by Spring
public WebClient getClient(List<? extends Feature> featureList) {
if (featureList == null || featureList.isEmpty()) {
throw new IllegalArgumentException("featureList is not
initialized.");
}
JAXRSClientFactoryBean bean = new JAXRSClientFactoryBean();
bean.setAddress(serviceUrl);
bean.setServiceClass(WebClient.class);
bean.setProviders(providerList);
bean.setFeatures(featureList);
return bean.createWebClient();
}
}{code}
{code:java}
<bean id="objectMapper" class="com.fasterxml.jackson.databind.ObjectMapper">
<property name="dateFormat">
<bean class="java.text.SimpleDateFormat"> <constructor-arg
type="java.lang.String" value="yyyy-MM-dd'T'HH:mm:ss"/>
</bean>
</property>
<property name="serializationInclusion">
<value
type="com.fasterxml.jackson.annotation.JsonInclude.Include">NON_NULL</value>
</property>
</bean>
<bean id="jsonProvider"
class="com.fasterxml.jackson.jaxrs.json.JacksonJsonProvider">
<property name="mapper" ref="objectMapper"/>
</bean>
<util:list id="providerList">
<ref bean="jsonProvider" />
<bean name="exceptionHandler"
class="com.voya.refapp.exception.AppExceptionHandler" />
</util:list>
<bean id="customerRestClientFactory"
class="com.voya.refapp.client.CustomerRestClientFactory">
<property name="providerList" ref="providerList" />
<property name="serviceUrl" value="${customer.rest.service.url}" />
</bean>
{code}
Log containing stack traces (attached).
After a lot of debugging, I came to an understanding that the *counter* for
connection failures never exceeds the threshold limit because the state of the
data (including the *counter*) is specific to each of the WebClient objects,
instantiated for each call. I assumed that if the same instance of a WebClient
is used across multiple calls that fail, then the *counter* would have been
updated and eventually open the circuit. Please find attached screenshot for
details.
!Reason_UnableToOpenCircuit_WebClient_ProgramaticApproach.png!
1) Is my understanding correct?
2) Kindly help with a working example, as the one mentioned in CWIKI
documentation is not working.
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