com.hazelcast.internal.config.DataPersistenceAndHotRestartMerger Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2021, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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 com.hazelcast.internal.config;
import com.hazelcast.config.DataPersistenceConfig;
import com.hazelcast.config.HotRestartConfig;
import com.hazelcast.logging.ILogger;
import com.hazelcast.logging.Logger;
public final class DataPersistenceAndHotRestartMerger {
private static final ILogger LOGGER = Logger.getLogger(DataPersistenceAndHotRestartMerger.class);
private DataPersistenceAndHotRestartMerger() {
}
/**
* if hot-restart: enabled="true" and data-persistence: enabled="false"
* => enable persistence and use the config from hot-restart.
* Does not break current deployments.
*
*
*
* if hot-restart: enabled="false" and data-persistence: enabled="true"
* => enable persistence and use the config from data-persistence. This is
* for the new users.
*
*
*
* if hot-restart: enabled="true" and data-persistence: enabled="true"
* => enable persistence and use the config from data-persistence. We prefer
* the new element, and the old one might get removed at some point.
*
* if hot-restart: enabled="false" and data-persistence: enabled="false"
* => we still do override hot-restart using data-persistence.
* It is necessary to maintain equality consistency.
*
* @param hotRestartConfig hotRestartConfig to use in the merge
* @param dataPersistenceConfig dataPersistenceConfig to use in the merge
*/
public static void merge(HotRestartConfig hotRestartConfig, DataPersistenceConfig dataPersistenceConfig) {
if (equals(hotRestartConfig, dataPersistenceConfig)) {
return;
}
if (hotRestartConfig.isEnabled() && !dataPersistenceConfig.isEnabled()) {
dataPersistenceConfig.setEnabled(true).setFsync(hotRestartConfig.isFsync());
return;
}
boolean override = hotRestartConfig.isEnabled() && dataPersistenceConfig.isEnabled();
hotRestartConfig.setEnabled(dataPersistenceConfig.isEnabled())
.setFsync(dataPersistenceConfig.isFsync());
if (override) {
LOGGER.warning(
"Please note that HotRestart is deprecated and should not be used. "
+ "Since both HotRestart and DataPersistence are enabled, "
+ "and thus there is a conflict, the latter is used in persistence configuration."
);
}
}
private static boolean equals(HotRestartConfig hotRestartConfig, DataPersistenceConfig dataPersistenceConfig) {
return hotRestartConfig.isEnabled() == dataPersistenceConfig.isEnabled()
&& hotRestartConfig.isFsync() == dataPersistenceConfig.isFsync();
}
}