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* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.action.admin.cluster.settings;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.block.ClusterBlocks;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.common.settings.ClusterSettings;
import org.elasticsearch.common.settings.Settings;
import static org.elasticsearch.cluster.ClusterState.builder;
/**
* Updates transient and persistent cluster state settings if there are any changes
* due to the update.
*/
final class SettingsUpdater {
final Settings.Builder transientUpdates = Settings.builder();
final Settings.Builder persistentUpdates = Settings.builder();
private final ClusterSettings clusterSettings;
SettingsUpdater(ClusterSettings clusterSettings) {
this.clusterSettings = clusterSettings;
}
synchronized Settings getTransientUpdates() {
return transientUpdates.build();
}
synchronized Settings getPersistentUpdate() {
return persistentUpdates.build();
}
synchronized ClusterState updateSettings(final ClusterState currentState, Settings transientToApply, Settings persistentToApply) {
boolean changed = false;
Settings.Builder transientSettings = Settings.builder();
transientSettings.put(currentState.metaData().transientSettings());
changed |= clusterSettings.updateDynamicSettings(transientToApply, transientSettings, transientUpdates, "transient");
Settings.Builder persistentSettings = Settings.builder();
persistentSettings.put(currentState.metaData().persistentSettings());
changed |= clusterSettings.updateDynamicSettings(persistentToApply, persistentSettings, persistentUpdates, "persistent");
if (!changed) {
return currentState;
}
MetaData.Builder metaData = MetaData.builder(currentState.metaData())
.persistentSettings(persistentSettings.build())
.transientSettings(transientSettings.build());
ClusterBlocks.Builder blocks = ClusterBlocks.builder().blocks(currentState.blocks());
boolean updatedReadOnly = MetaData.SETTING_READ_ONLY_SETTING.get(metaData.persistentSettings()) || MetaData.SETTING_READ_ONLY_SETTING.get(metaData.transientSettings());
if (updatedReadOnly) {
blocks.addGlobalBlock(MetaData.CLUSTER_READ_ONLY_BLOCK);
} else {
blocks.removeGlobalBlock(MetaData.CLUSTER_READ_ONLY_BLOCK);
}
ClusterState build = builder(currentState).metaData(metaData).blocks(blocks).build();
Settings settings = build.metaData().settings();
// now we try to apply things and if they are invalid we fail
// this dryRun will validate & parse settings but won't actually apply them.
clusterSettings.validateUpdate(settings);
return build;
}
}