MultiVMPool cache in Liferay 6.2

[Giang Nguyen, geändert vor 10 Jahren.]

Hi all,

In LR 6.0, I set the cache by MultiVMPoolUtil by this:

MultiVMPoolUtil.put("Cache-name", "key" ,"value");

But in LR 6.2, when I deploy sample portlet with MultiVMPoolUtil.put() method, server throws these exception:

Caused by: java.lang.NoSuchMethodError: com.liferay.portal.kernel.cache.MultiVMPoolUtil.put(Ljava/lang/String;Ljava/lang/String;Ljava/io/Ser
ializable;)V

when I looking in the source code of LR, I can not find put method. So how can I set cache by MultiVMPool in LR 6.2?

Thank you.

[Juan Gonzalez, geändert vor 10 Jahren.]

i Giang,

guess what you need is:

MultiVMPoolUtil.getCache("yourCacheName").put(key, value)

[Giang Nguyen, geändert vor 10 Jahren.]

Hi Juan,
Thanks for your support. After I used your recommend code, I got new no method exception with method put() in PortalCache package.

Caused by: java.lang.NoSuchMethodError: com.liferay.portal.kernel.cache.PortalCache.put(Ljava/io/Serializable;Ljava/io/Serializable;)V

I found put() in source code of LR 6.2, but I dont know why it throw exception.
Do you have any solution for this?

[Antoine Comble, geändert vor 10 Jahren.]

Hi,

You should read the api : http://grepcode.com/file/repo1.maven.org/maven2/com.liferay.portal/portal-service/6.2.0/com/liferay/portal/kernel/cache/BlockingPortalCache.java?av=f

At line 111, the code is _portalCache.put(key, value).
On mouseover, you could read the value parameter expected must be java.lang.Object.

Hope this help you,

Regards,

Antoine

[Giang Nguyen, geändert vor 10 Jahren.]

Hi Antoine,
I read the api already and I thought we can put a pair <key,value> with any value. Because java.lang.Object is the root of any type in java, included String, right?

http://docs.oracle.com/javase/7/docs/api/java/lang/String.html

One more thing the put() method we are talking is come from PortalCache.java, not BlockingPortalCache.java. So i dont think this is problem.

[Antoine Comble, geändert vor 10 Jahren.]

PortalCache is an interface and BlockingPortalCache implements it.

It was for an example of use of PortalCache.put method.

You're right. If String cannot put as value, this is not the problem.

Antoine

[Tushar Patel, geändert vor 8 Jahren.]

Antoine Comble:

PortalCache is an interface and BlockingPortalCache implements it.

It was for an example of use of PortalCache.put method.

You're right. If String cannot put as value, this is not the problem.

Antoine

Hi Antoine

Can you put little snippet for put the catche? Earlier we are using MultiVMPoolUtil.put() method. Thanks

[archana thakur, geändert vor 7 Jahren.]

Hi Gonzalez ,

I am upgrading liferay 6.1 to 6.2

instead of this
MultiVMPoolUtil.put(cacheName, key, cacheObj);

I am using this method

String kv = (String)MultiVMPoolUtil.getCache(cacheName);
MultiVMPoolUtil.getCache("CacheName").put(key, kv);

its giving me compilation error
incompatible types: PortalCache<Serializable,Serializable> cannot be converted to String

can you please help me or anyone is resolve this issue.

Thanks
Archana

[Juan Gonzalez, geändert vor 7 Jahren.]

archana thakur:

its giving me compilation error
incompatible types: PortalCache<Serializable,Serializable> cannot be converted to String

can you please help me or anyone is resolve this issue.

Thanks
Archana

getCache doesn't return a String object, but a PortalCache object. You sould change that.

[archana thakur, geändert vor 7 Jahren.]

Hi Gonzalez

now I make change this
PortalCache cache = MultiVMPoolUtil.getCache("cacheName");

its giving me error message
CacheUtil.java:[113,2] error: cannot find symbol


Thanks
Archana

[Juan Gonzalez, geändert vor 7 Jahren.]

archana thakur:

Hi Gonzalez

now I make change this
PortalCache cache = MultiVMPoolUtil.getCache("cacheName");

its giving me error message
CacheUtil.java:[113,2] error: cannot find symbol


Thanks
Archana

Sorry I think there are missing info there, paste complete error.

You probably forgot to import some packages for that code.

[archana thakur, geändert vor 7 Jahren.]

Hi Juan,

After make this API changes we are facing one other issue in Liferay 6.2.1 EE .
ehcache class is not loading , we have try to loading this class with different version but no success .

net.sf.ehcache.CacheException:
Unable to load class net.sf.ehcache.store.DefaultElementValueComparator.
Initial cause was net.sf.ehcache.store.DefaultElementValueComparator.<
init>(net.sf.ehcache.config.CacheConfiguration)
at net.sf.ehcache.util.ClassLoaderUtil.createNewInstance(ClassLoaderUtil.java:100)
at net.sf.ehcache.config.ElementValueComparatorConfiguration.createElementComparatorInstance(ElementValueComparatorConfiguration.java:57)
at net.sf.ehcache.Cache.<init>(Cache.java:791)
at net.sf.ehcache.Cache.clone(Cache.java:2761)
at net.sf.ehcache.Cache.clone(Cache.java:163)
at net.sf.ehcache.CacheManager.cloneDefaultCache(CacheManager.java:1945)
at net.sf.ehcache.CacheManager.addCache(CacheManager.java:1218)
Regards
Archana