[infinispan-issues] [JBoss JIRA] (ISPN-11802) Create SPI for Cross-Site Replication conflict resolution

[Pedro Ruivo (Jira)]

     [ https://issues.redhat.com/browse/ISPN-11802?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Pedro Ruivo updated ISPN-11802:
-------------------------------
              Status: Pull Request Sent  (was: Coding In Progress)
    Git Pull Request: https://github.com/infinispan/infinispan/pull/8332


> Create SPI for Cross-Site Replication conflict resolution
> ---------------------------------------------------------
>
>                 Key: ISPN-11802
>                 URL: https://issues.redhat.com/browse/ISPN-11802
>             Project: Infinispan
>          Issue Type: Enhancement
>          Components: Core, Cross-Site Replication
>            Reporter: Pedro Ruivo
>            Assignee: Pedro Ruivo
>            Priority: Major
>
> A conflict happens if 2 sites try to update the same key (put/remove) concurrently. 
> With async Cross-Site Replication (aka IRAC) when a conflict is detected, we use the site name to pick the winning update.
> h2.  Interface
> {code:java}
> interface ABC<V> { // or concrete class
>   String site(); //the site name which wrote this value
>   V value(); // the value. can be null if the key was removed
>   Metadata metadata(); //can be null
> }
> interface Resolve<K, V> {
>   ABC<V> resolve(K key, ABC<V> entry1, ABC<V> entry2);
> }
> {code}
> h2. Configuration
> Set the class name to use. Can be a {{Class}} object (as shown above) or a {{String}} with the class name.
> For server mode, you need to add your jar with the classes required to {{server/lib}}.
> The configuration fails to validate if the conflict resolution class is set with {{SYNC}} strategy.
> {code:java}
> ConfigurationBuilder.sites().addBackup()
>    .site("S")
>   .strategy(BackupConfiguration.BackupStrategy.ASYNC)
>   .conflictResolution(MyResover.class);
> {code}



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