Integrating Spring 3.1 Cacheable Annotation with Hazelcast

[cenkcivici]

As you may know, Spring 3.1 provides method annotations to be able
cache the result of method calls.

http://static.springsource.org/spring/docs/3.1.0.M1/spring-framework-reference/html/cache.html

Ehcache is supported builtin and I have written the following code to
provide support for Hazelcast. Sharing it incase someone else may
need the same thing.


import java.util.Collection;
import java.util.LinkedHashSet;

import org.springframework.cache.Cache;
import org.springframework.cache.support.AbstractCacheManager;

import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.core.IMap;

public class HazelcastCacheManager extends AbstractCacheManager {

private HazelcastInstance hazelcastInstance;
private String mapName;

public HazelcastCacheManager(HazelcastInstance
hazelcastInstance,String mapName) {
this.hazelcastInstance = hazelcastInstance;
this.mapName = mapName;
}

@Override
protected Collection<Cache> loadCaches() {
Collection<Cache> caches = new LinkedHashSet<Cache>(1);
IMap<Object, Object> map = hazelcastInstance.getMap(mapName);

caches.add(new HazelcastCache(mapName,map));
return caches;
}
}

And the cache class


import java.util.Map;

import org.springframework.cache.Cache;
import org.springframework.cache.support.ValueWrapperImpl;

public class HazelcastCache implements Cache {

private final Map<Object, Object> cacheMap;
private final String name;

public HazelcastCache(String name, Map<Object, Object> cacheMap) {
this.name = name;
this.cacheMap = cacheMap;
}

@Override
public void clear() {
cacheMap.clear();
}

@Override
public void evict(Object key) {
if (key != null) {
cacheMap.remove(key);
}
}

@Override
public ValueWrapper get(Object key) {
if (key == null) {
return null;
}

Object value = cacheMap.get(key);
return value == null ? null : new ValueWrapperImpl(value);
}


@Override
public String getName() {
return name;
}

@Override
public Object getNativeCache() {
return cacheMap;
}

@Override
public void put(Object key, Object value) {
if ((key != null) && (value != null)) {
cacheMap.put(key, value);
}
}
}

Spring configuration

<cache:annotation-driven cache-manager="cacheManager" />

<bean id="cacheManager" class="com.prime.HazelcastCacheManager">
<constructor-arg ref="hazelinstance" />
<constructor-arg value="springcache" />
</bean>

and you also need to define a map for spring cache

<hz:map name="springcache" ....>
</hz:map>

[Mehmet Dogan]

Are you using HazelcastCacheManager provided by Hazelcast?

http://www.hazelcast.com/docs/2.1/manual/single_html/#SpringCache

@mmdogan

On Wed, Jun 20, 2012 at 12:36 AM, Rafael Sanches <mufu...@gmail.com> wrote:

I tried doing this on the last version, using the Manager provided by the library.

The result is that my server don't start anymore since it can't create the bean where I set the @Cacheable("myMap")... 

Anyone facing the same issue?

thanks

rafael

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