JCache (JSR 107) Example

[Phillip Kruger]

Hi All.

I am trying to get JCache (JSR 107) working on v2.1.0.

Does anyone have some examples / pointers ? Or even example to get infinispan going on thorntail.

Thanks

Phillip

[Ken Finnigan]

Hi Phillip,

https://github.com/wildfly-swarm-openshiftio-boosters/wfswarm-cache is an example of connecting to an external Infinispan cache, but I don't think we've got examples of Cache or Infinispan server usage.

Ken

[Phillip Kruger]

Thanks for the reply Ken. I'll have a look at that repo.

[markus.s]

Hello Phillip,

what worked for me is the following JCache/CDI based approach:

1) declaring basic infinispan dependencies (NOT io.thorntail):

<dependencyManagement>
    <dependencies>
    ...
        <dependency>
            <groupId>org.infinispan</groupId>
            <artifactId>infinispan-bom</artifactId>
            <version>${version.infinispan}</version>
            <scope>import</scope>
            <type>pom</type>
        </dependency>
    ...
    </dependencies>
</dependencyManagement>

<dependencies>
    ...
    <dependency>
      <groupId>javax.cache</groupId>
      <artifactId>cache-api</artifactId>
        </dependency>
        <dependency>
            <groupId>org.infinispan</groupId>
            <artifactId>infinispan-jcache</artifactId>
        </dependency>
        <dependency>
            <groupId>org.infinispan</groupId>
            <artifactId>infinispan-cdi-embedded</artifactId>
        </dependency>
    ...
</dependencies>

2) Providing a global cache configuration as CDI producer

public class GlobalCacheConfig {

    @Produces
    public Configuration globalCacheConfiguration() {
        return new ConfigurationBuilder().expiration().lifespan(60000, TimeUnit.SECONDS).build();
    }

}

3) Declaring infinispan CDI interceptors in beans.xml

    <interceptors>
        <class>org.infinispan.jcache.annotation.InjectedCacheResultInterceptor</class>
        <class>org.infinispan.jcache.annotation.InjectedCachePutInterceptor</class>
        <class>org.infinispan.jcache.annotation.InjectedCacheRemoveEntryInterceptor</class>
        <class>org.infinispan.jcache.annotation.InjectedCacheRemoveAllInterceptor</class>
    </interceptors>

4) Using JCache annotations api for caching (i.e. method results)

public class MyService {

    @javax.cache.annotation.CacheResult
    public MyObject load() {
      ...
        return new MyObject();
    }
}

What not worked:

declaring individual cache configurations with custom qualifier annotations like explained here. (@ConfigureCache("my-cache") ...)

Maybe some of the thornatil experts are having a hint for us...

KR

Markus

[Phillip Kruger]

Hi Markus.

This is awesome ! Thanks, I am going to try and get an example running on this. Will refer back once I have something.

Cheers

[Phillip Kruger]

Hi Markus (and others)

@Markus - your example got me going and I now have a working example.

https://github.com/phillip-kruger/thorntail-jcache-example

(It's very easy to get this running on your PC - see the README)

I made some changes to your original suggestion, my thorntail use autodetection of the fractions, so as soon as I use Infinispan code, the infinispan fraction is included, so I made it provided in the pom.xml.

I go it working to cache on one thorntail server, and read the cache on the other server (distributed grid). The cache also expire after a minute, and is configured with infinispan.xml.

However, I could not get the notifications / events to work :(

For JCache (ideally what I would want to use) :

@Log @RequestScoped
public class CacheListener {

    public void cacheEntryCreatedEvent(@Observes CacheEntryCreatedEvent event) {
        System.out.println(">>>>>>> JCACHE >> New entry " + event.getKey() + " created in the cache");
    }

    public void cacheEntryEvent(@Observes CacheEntryEvent event) {
        System.out.println(">>>>>>> JCACHE >> entry event " + event.getKey() + " [" + event + "]");
    }
   
    public void cacheEntryExpiredEvent(@Observes CacheEntryExpiredEvent event) {
        System.out.println(">>>>>>> JCACHE >> Old entry " + event.getKey() + " expiring");
    }
   
    public void cacheStartedEvent(@Observes CacheStartedEvent event) {
        System.out.println(">>>>>>> JCACHE >> New cache " + event.getCacheName() + " started");
    }
}

For Infinispan:

@Listener (clustered = true)
public class PrintWhenAdded {
    @CacheEntryCreated
    public void print(CacheEntryCreatedEvent event) {
        System.out.println(">>>>>>> INFINISPAN >> New entry " + event.getKey() + " created in the cache");
    }
}

Any suggestions ? Should I rather as on the Infinispan group ?

Thanks in advance

[markus.s]

Hello Phillip,

have you found a solution for your listener problem ?

KR

Markus

[Phillip Kruger]

Hi Markus,

Not yet (for Infinispan) although I believe it's just a configuration that I am missing.

I also added Hazelcast to see if I can use JCache in Thorntail with Hazelcast IMDG, and there I could get the listeners to work.

I'll spend some more time on it this weekend and let you know. The latest source in the above mentioned Github project has got the working Hazelcast.

Thanks