/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.ignite.plugin.segmentation;
import org.apache.ignite.configuration.IgniteConfiguration;
import org.jetbrains.annotations.Nullable;
/**
* Policy that defines how node will react on topology segmentation. Note that default
* segmentation policy is defined by {@link IgniteConfiguration#DFLT_SEG_PLC} property.
* @see SegmentationResolver
*/
public enum SegmentationPolicy {
/**
* When segmentation policy is {@code RESTART_JVM}, all listeners will receive
* {@link org.apache.ignite.events.EventType#EVT_NODE_SEGMENTED} event and then JVM will be restarted.
* Note, that this will work <b>only</b> if Ignite is started with {@link org.apache.ignite.startup.cmdline.CommandLineStartup}
* via standard {@code ignite.{sh|bat}} shell script.
*/
RESTART_JVM,
/**
* When segmentation policy is {@code STOP}, all listeners will receive
* {@link org.apache.ignite.events.EventType#EVT_NODE_SEGMENTED} event and then particular grid node
* will be stopped via call to {@link org.apache.ignite.Ignition#stop(String, boolean)}.
*/
STOP,
/**
* When segmentation policy is {@code NOOP}, all listeners will receive
* {@link org.apache.ignite.events.EventType#EVT_NODE_SEGMENTED} event and it is up to user to
* implement logic to handle this event.
*/
NOOP;
/** Enumerated values. */
private static final SegmentationPolicy[] VALS = values();
/**
* Efficiently gets enumerated value from its ordinal.
*
* @param ord Ordinal value.
* @return Enumerated value or {@code null} if ordinal out of range.
*/
@Nullable public static SegmentationPolicy fromOrdinal(int ord) {
return ord >= 0 && ord < VALS.length ? VALS[ord] : null;
}
}