Error while adding user defined advancedExternalizers programatically in Infinispan 5.1.1

[ursudheesh]

Hi ,

I did follow the updated user-guide for plugging  user defined externalizers.

https://docs.jboss.org/author/display/ISPN/Plugging+Infinispan+With+User+Defined+Externalizers

I have followed the example Person.PersonExteranlizer implementing the AdvacnedExternalizer. I have been able to register the externalizer using the configuration as mentioned.

However when i register them programtically like this:

public class MyCacheClient {

          public static void main(String args[]) {

                    EmbeddedCacheManager embCacheMgr = null;

                    Person personBeanObj = new Person("Sudheesh",29);

                              try {

                                        embCacheMgr = new DefaultCacheManager("InfinispanCfgForNode1.xml");

                                        GlobalConfigurationBuilder builder = new GlobalConfigurationBuilder();

                                        builder.serialization().addAdvancedExternalizer(new Person.PersonExternalizer());

                                        Cache personCache = embCacheMgr.getCache("InfinispanClientTest");

                                        personCache.put("person1",personBeanObj);

                                        Object cachedObj =  personCache.get("person1");

                                        if(cachedObj.equals(personBeanObj)){

                                                  logger.info("Success----------The objects are equal");

                                        }

                                        personCache.stop();

                                        embCacheMgr.stop();

                              } catch (IOException e) {

                                        // TODO Auto-generated catch block

                                        e.printStackTrace();

                              }

          }

}

and execute i get the following error:

Exception in thread "main" org.infinispan.marshall.NotSerializableException: com.hp.usage.datastruct.beans.mycompany.Person

Caused by: an exception which occurred:

          in object com.hp.usage.datastruct.beans.mycompany.Person@ad157f

                    -> toString = com.hp.usage.datastruct.beans.mycompany.Person@ad157f

          in object org.infinispan.container.entries.ImmortalCacheEntry@1b173583

                    -> toString = ImmortalCacheEntry{key=person1, value=ImmortalCacheValue {value=com.hp.usage.datastruct.beans.mycompany.Person@ad157f}}

          in object org.infinispan.loaders.bucket.Bucket@717d91

                    -> toString = Bucket{entries={person1=ImmortalCacheEntry{key=person1, value=ImmortalCacheValue {value=com.hp.usage.datastruct.beans.mycompany.Person@ad157f}}}, bucketId='-678441984'}

I am using a distributed cache configuration for testing.

Pls help me on this error.

regards

Sudheesh

[galder.zamarreno]

The code above does nothing with the global configuration builder. You should call build() on it and the return pass it to the DefaultCacheManager constructor. Your code above is just using whatever's configured in the XML.

[ursudheesh]

Hi Galder,

I modified the cache client as follows:

GlobalConfigurationBuilder builder = new GlobalConfigurationBuilder();

                                        builder.serialization().addAdvancedExternalizer(new Person.PersonExternalizer());

                                        GlobalConfiguration config = builder.build();

                                        embCacheMgr = new DefaultCacheManager(config);

I am now able to store and retrieve the Person object in the cache.

In my scenario,we have rest of the cache configurations such as globalJmxStatistics, loaders etc in the XML file. So how do i bring a hybrid of XML configuration + API registration of externalizer for a given EmbeddedCacheManager?

Thanks in advance

[galder.zamarreno]

What's stopping you from configuring your externalizers via XML?

[ursudheesh]

Galder,

Our solution aims to generate the externalizer code using byte code manipulator and register them programatically during runtime. So these externalizers cant be configured via configuration.

Hence we are looking for a hybrid model

Regards

Sudheesh

[galder.zamarreno]

Hmmm, that sounds odd. Byte code manipulation apart, hybrid configurations can be achieved in theory with Infinispan. What you'd need to do is mimmic what's done in in the DefaultCacheManager constructor in:

https://github.com/galderz/infinispan/blob/master/core/src/main/java/org/infinispan/manager/DefaultCacheManager.java#L366

So, you'd get your XML, get an InputStream and generate the configuration builder classes. Using those, you'd then add you magic externalizer configuration, and pass those builders to the DCM, maybe creating a brand new instance.

It's an odd use case, so if I were you I'd try to think about the value of doing all this and try to simplify it.