Hibernate optimist locking code snippet #12

snippet.groovy

// Use any domain class
MyDomain.withTransaction { txn ->
    // Load objects
    def object = MyDomain.get(params.id)

    // Discover we do need to make changes to the main object
    try {
        object.lock()
    } catch (Exception e) {
        // Recover from staleness   
        // Reload locked…
        object = MyDomain.lock(params.id)
        // Double check - do we still want to change it now?
    }

    // Make some changes
    object.property1 = 'hello'
}