Hi
We need to have ability to calling shutdown with various guaranties.
For example:
Need to reboot a node, but after that node should be available for
historical rebalance (all partitions in MOVING state should have gone to
OWNING).
Implemented a circled reboot of cluster, but all data should be available
on that time (at least one copy of partition should be available in
cluster).
Need to wait not only data available, but all jobs (before this behavior
available through a stop(false) method invocation).
All these reason required various behavior before shutting down node.
I propose slightly modify public API and add here method which shown on
shutdown behavior directly:
Ignite.close(Shutdown)
<i>public enum Shutdownn {
/**
* Stop immediately as soon components are ready.
*/
IMMEDIATE,
/**
* Stop node when all partitions completed moving from/to this node to
another.
*/
NORMAL,
/**
* Node will stop if and only if it does not store any unique
partitions, that does not have copies on cluster.
*/
GRACEFUL,
/**
* Node stops graceful and wait all jobs before shutdown.
*/
ALL
}</i>
Method close without parameter Ignite.close() will get shutdown behavior
configured for cluster wide. It will be implemented through distributed
meta storage and additional utilities for configuration.
Also, will be added a method to configure shutdown on start, this is look
as IgniteConfiguration.setShutdown(Shutdown).
If shutting down did not configure all be worked as before according to
IMMEDIATE behavior.
All other close method will be marked as deprecated.
I will be waiting for your opinions.
--
Vladislav Pyatkov
