/*
* 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.discovery;
import org.elasticsearch.ElasticsearchIllegalArgumentException;
import org.elasticsearch.cluster.block.ClusterBlock;
import org.elasticsearch.cluster.block.ClusterBlockLevel;
import org.elasticsearch.common.component.AbstractComponent;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.node.settings.NodeSettingsService;
import org.elasticsearch.rest.RestStatus;
import java.util.EnumSet;
/**
* Exposes common discovery settings that may be supported by all the different discovery implementations
*/
public class DiscoverySettings extends AbstractComponent {
public static final String PUBLISH_TIMEOUT = "discovery.zen.publish_timeout";
public static final String NO_MASTER_BLOCK = "discovery.zen.no_master_block";
public static final TimeValue DEFAULT_PUBLISH_TIMEOUT = TimeValue.timeValueSeconds(30);
public static final String DEFAULT_NO_MASTER_BLOCK = "write";
public final static int NO_MASTER_BLOCK_ID = 2;
public final static ClusterBlock NO_MASTER_BLOCK_ALL = new ClusterBlock(NO_MASTER_BLOCK_ID, "no master", true, true, RestStatus.SERVICE_UNAVAILABLE, ClusterBlockLevel.ALL);
public final static ClusterBlock NO_MASTER_BLOCK_WRITES = new ClusterBlock(NO_MASTER_BLOCK_ID, "no master", true, false, RestStatus.SERVICE_UNAVAILABLE, EnumSet.of(ClusterBlockLevel.WRITE, ClusterBlockLevel.METADATA));
private volatile ClusterBlock noMasterBlock;
private volatile TimeValue publishTimeout = DEFAULT_PUBLISH_TIMEOUT;
@Inject
public DiscoverySettings(Settings settings, NodeSettingsService nodeSettingsService) {
super(settings);
nodeSettingsService.addListener(new ApplySettings());
this.noMasterBlock = parseNoMasterBlock(settings.get(NO_MASTER_BLOCK, DEFAULT_NO_MASTER_BLOCK));
this.publishTimeout = settings.getAsTime(PUBLISH_TIMEOUT, publishTimeout);
}
/**
* Returns the current publish timeout
*/
public TimeValue getPublishTimeout() {
return publishTimeout;
}
public ClusterBlock getNoMasterBlock() {
return noMasterBlock;
}
private class ApplySettings implements NodeSettingsService.Listener {
@Override
public void onRefreshSettings(Settings settings) {
TimeValue newPublishTimeout = settings.getAsTime(PUBLISH_TIMEOUT, null);
if (newPublishTimeout != null) {
if (newPublishTimeout.millis() != publishTimeout.millis()) {
logger.info("updating [{}] from [{}] to [{}]", PUBLISH_TIMEOUT, publishTimeout, newPublishTimeout);
publishTimeout = newPublishTimeout;
}
}
String newNoMasterBlockValue = settings.get(NO_MASTER_BLOCK);
if (newNoMasterBlockValue != null) {
ClusterBlock newNoMasterBlock = parseNoMasterBlock(newNoMasterBlockValue);
if (newNoMasterBlock != noMasterBlock) {
noMasterBlock = newNoMasterBlock;
}
}
}
}
private ClusterBlock parseNoMasterBlock(String value) {
switch (value) {
case "all":
return NO_MASTER_BLOCK_ALL;
case "write":
return NO_MASTER_BLOCK_WRITES;
default:
throw new ElasticsearchIllegalArgumentException("invalid master block [" + value + "]");
}
}
}