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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
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package org.elasticsearch.discovery;
import org.elasticsearch.cluster.ClusterChangedEvent;
import org.elasticsearch.cluster.ClusterName;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.block.ClusterBlocks;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.cluster.node.DiscoveryNodes;
import org.elasticsearch.cluster.service.ClusterApplier;
import org.elasticsearch.cluster.service.MasterService;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.discovery.single.SingleNodeDiscovery;
import org.elasticsearch.transport.TransportService;
import static org.elasticsearch.tribe.TribeService.BLOCKS_METADATA_SETTING;
import static org.elasticsearch.tribe.TribeService.BLOCKS_WRITE_SETTING;
import static org.elasticsearch.tribe.TribeService.TRIBE_METADATA_BLOCK;
import static org.elasticsearch.tribe.TribeService.TRIBE_WRITE_BLOCK;
/**
* A {@link Discovery} implementation that is used by {@link org.elasticsearch.tribe.TribeService}. This implementation
* doesn't support any clustering features. Most notably {@link #startInitialJoin()} does nothing and
* {@link #publish(ClusterChangedEvent, AckListener)} delegates state updates directly to the
* {@link org.elasticsearch.cluster.service.ClusterApplierService}.
*/
public class TribeDiscovery extends SingleNodeDiscovery implements Discovery {
@Inject
public TribeDiscovery(Settings settings, TransportService transportService,
MasterService masterService, ClusterApplier clusterApplier) {
super(settings, transportService, masterService, clusterApplier);
}
@Override
protected ClusterState createInitialState(DiscoveryNode localNode) {
ClusterBlocks.Builder clusterBlocks = ClusterBlocks.builder(); // don't add no_master / state recovery block
if (BLOCKS_WRITE_SETTING.get(settings)) {
clusterBlocks.addGlobalBlock(TRIBE_WRITE_BLOCK);
}
if (BLOCKS_METADATA_SETTING.get(settings)) {
clusterBlocks.addGlobalBlock(TRIBE_METADATA_BLOCK);
}
return ClusterState.builder(ClusterName.CLUSTER_NAME_SETTING.get(settings))
.nodes(DiscoveryNodes.builder().add(localNode).localNodeId(localNode.getId()).build())
.blocks(clusterBlocks).build();
}
@Override
public synchronized void startInitialJoin() {
// no state recovery required as tribe nodes don't persist cluster state
}
}