Hi,
I've got a web service that is used to populate an Ajax-type interface.
However, the call is very slow, due to a variety of reasons, but that data
is generally pretty stagnant. So, I had this in mind: Use the Timer componet
to periodically call the service to service and store the resulting XML in
the Cache Component. Unfortunately, I haven't had any luck getting the Cache
component to work, even after somewhat carefully following the examples. For
instance, I have a lwContainer that includes the following servicemix.xml
definition:
<sm:activationSpec componentName="timer" service="my:timer"
destinationService="my:myService">
<sm:component>
l <bean
class="org.apache.servicemix.components.quartz.QuartzComponent">
<property name="triggers">
<map>
<entry>
<key>
<bean
class="org.quartz.SimpleTrigger">
<property
name="repeatInterval" value="50000"/>
<property
name="repeatCount" value="-1"/>
</bean>
</key>
<bean
class="org.quartz.JobDetail">
<property name="name"
value="job"/>
<property name="group"
value="ServiceMix"/>
</bean>
</entry>
</map>
</property>
</bean>
</sm:component>
</sm:activationSpec>
<sm:activationSpec componentName="myService" service="my:myService"
destinationService="my:myServiceImpl">
<sm:component>
<bean xmlns=""
class="org.apache.servicemix.components.cache.CacheComponent">
<property name="cache">
<bean
class="org.apache.servicemix.components.cache.LRUCache">
<constructor-arg value="100"/>
</bean>
</property>
<!-- lets define the cache key expression -->
<property name="keyExpression">
<bean
class="org.apache.servicemix.expression.JaxenStringXPathExpression">
<constructor-arg value="//name"/>
</bean>
</property>
</bean>
</sm:component>
</sm:activationSpec>
(my:myServiceImpl just is a groovy script taken verbatim from the CacheTest
class).
Now, my understanding is that the incoming XML into the CacheComponent will
be stored using a key defined by the XPATH expression //name (which would be
job, as it arrives from the Timer).
Within my JSR 181 component, I am then doing the following (only showing the
relavent parts);
public void setContext(javax.jbi.component.ComponentContext context) {
System.out.println("===================Context getting
populated...");
this.context = context;
}
private void myMethod() {
ServiceMixClient client = new
ServiceMixClientFacade(this.context);
QName service = new QName("http://servicemix.apache.org/demo/";,
"myService");
EndpointResolver cachedService =
client.createResolverForService(service);
Object object = null;
try {
// the XML shown in the request is taken verbatim
from the Timer output
object = client.request(cachedService, null, null,
"<timer><name>job</name><group>ServiceMix</group><fullname>ServiceMix.job</fullname><description/><fireTime>Wed
Oct 18 15:46:53 PDT 2006</fireTime></timer>");
} catch (JBIException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (object instanceof Node) {
object = new DOMSource((Node) object);
}
System.out.println("****************** Cache: Received
response: " +
object);
}
No matter what I do, the object response always comes back as null (it shows
that it's of type #document). I have log4j debugging turned on, and I see
the CacheComponent getting the message, so that part is working (and prior
to that, I see the Timer sending it data).
I suspect I'm not getting how the CacheComponent should be used? Are my
problems related to me calling client.request from within a JSR component?
Thanks so much for your help!!
jeff
p.s, Servicemix Rocks!! btw!
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