This project demonstrates how to perform a data migration between applications using an embedded Infinispan cache manager.
Each application instance, which may be a cluster composed of multiple nodes, needs to include a Hot Rod Server which exposes the embedded caches. When a new application instance is created, each cache that needs to be migrated must be configured with a RemoteCacheStore pointing to the source. Client traffic must be directed to the target instance before the synchronization process is initiated. The target instance will retrieve entries from the source instance on-demand. The synchronization process will then migrate all entries from the source: this process runs in the background and doesn't affect operations on the target. Once the migration is complete, the RemoteCacheStore is disconnected from the source. At this point, the source may safely be terminated.
Compile:
$ mvn clean package
Run the first instance (source): The following command will create a HotRod server that will expose the source Cache Manager to be synchronized. The HotRod Server endpoint will listen to the bind adress argument b and the port arguments and expose two caches: caches and cachesTwo
$ java -classpath target/infinispan-playground-embedded-migration.jar org.infinispan.playground.embeddedmigration.EmbeddedMigrationSource -c src/main/resources/infinispan.xml -b 127.0.0.1 -p 11222
Run the second instance (target): the following command will start the target instance, configure the Remote Cache Store from the Hot Rod Server listening to the f argument and synchronise the entries to the target Cache Manager. The argument cache will select the cahce to synchronise
$ java -classpath target/infinispan-playground-embedded-migration.jar org.infinispan.playground.embeddedmigration.EmbeddedMigrationTarget -c src/main/resources/infinispan.xml -f hotrod://127.0.0.1:11222 -cache cacheTwo
Once the migration is complete the source instance can be terminated with Ctrl-C.