case INIT_OPERATION:
return new InitOperation();
case REDUCE_BACKUP_OPERATION:
return new ReduceBackupOperation();
case REDUCE_OPERATION:
return new ReduceOperation();
case RELEASE_BACKUP_OPERATION:
return new ReleaseBackupOperation();
case RELEASE_OPERATION:
return new ReleaseOperation();
case SEMAPHORE_DEAD_MEMBER_OPERATION: