Cassandra Persistence Store without POJO on Server

["Roger Fischer (CW)" <rf...@Brocade.com>]

Hello,

is it possible to use the Cassandra Persistence Store (libs/optional/ignite-cassandra-store) without the need to deploy the key and object POJOs on the server?

For basic data grid use, it seems that everything defaults to binary objects. put(), get() SQL queries, native persistence and affinity all work without having to deploy the POJO on the servers. The POJO are referenced in the XML configuration, but a JAR with the POJO is _not_ required on the server. Only the client uses the POJO.

However, when using the Cassandra persistence store, the server reports a startup error when the POJO are not present.
Caused by: class org.apache.ignite.IgniteException: Failed to load class 'com.abc.poc.icpoc.model.Fabric' using reflection
        at org.apache.ignite.cache.store.cassandra.persistence.PersistenceSettings.getClassInstance(PersistenceSettings.java:504)
        at org.apache.ignite.cache.store.cassandra.persistence.PersistenceSettings.<init>(PersistenceSettings.java:128)

I would prefer not to have to redeploy the POJO to the servers when there are data (object) changes.

Roger

RE: Cassandra Persistence Store without POJO on Server

["Roger Fischer (CW)" <rf...@Brocade.com>]

Thanks, Val. I keep an eye on the ticket.

Roger


-----Original Message-----
From: vkulichenko [mailto:valentin.kulichenko@gmail.com] 
Sent: Thursday, August 24, 2017 3:43 PM
To: user@ignite.apache.org
Subject: Re: Cassandra Persistence Store without POJO on Server

Hi Roger,

Currently this is not possible. If POJO strategy is used, classes need to be deployed. There is a ticket to improve this:
https://urldefense.proofpoint.com/v2/url?u=https-3A__issues.apache.org_jira_browse_IGNITE-2D5270&d=DwICAg&c=IL_XqQWOjubgfqINi2jTzg&r=1esZO0r0bYS90lcsaLA6N4AFxuNo6lzauhETGwdJQoQ&m=YIEu2XRwOzDh3k5owk0EWXoxfNIKcKGNotw-0MLxDH4&s=cXPVI2a9AEQdkdR4U8lZrCb_58i18LJP9Un_EUhbbkE&e= 

If it's an option for you, you can switch to BLOB strategy and store values in binary from in Cassandra. In this case you don't need to deploy classes.

-Val



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Re: Cassandra Persistence Store without POJO on Server

[vkulichenko <va...@gmail.com>]

Hi Roger,

Currently this is not possible. If POJO strategy is used, classes need to be
deployed. There is a ticket to improve this:
https://issues.apache.org/jira/browse/IGNITE-5270

If it's an option for you, you can switch to BLOB strategy and store values
in binary from in Cassandra. In this case you don't need to deploy classes.

-Val



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