org.elasticsearch.cluster.routing.allocation.allocator.ShardsAllocators Maven / Gradle / Ivy
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*
* http://www.apache.org/licenses/LICENSE-2.0
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package org.elasticsearch.cluster.routing.allocation.allocator;
import org.elasticsearch.cluster.routing.MutableShardRouting;
import org.elasticsearch.cluster.routing.RoutingNode;
import org.elasticsearch.cluster.routing.RoutingNodes;
import org.elasticsearch.cluster.routing.allocation.FailedRerouteAllocation;
import org.elasticsearch.cluster.routing.allocation.RoutingAllocation;
import org.elasticsearch.cluster.routing.allocation.StartedRerouteAllocation;
import org.elasticsearch.common.component.AbstractComponent;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.ImmutableSettings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.gateway.none.NoneGatewayAllocator;
/**
* The {@link ShardsAllocator} class offers methods for allocating shard within a cluster.
* These methods include moving shards and re-balancing the cluster. It also allows management
* of shards by their state.
*/
public class ShardsAllocators extends AbstractComponent implements ShardsAllocator {
private final GatewayAllocator gatewayAllocator;
private final ShardsAllocator allocator;
public ShardsAllocators() {
this(ImmutableSettings.Builder.EMPTY_SETTINGS);
}
public ShardsAllocators(Settings settings) {
this(settings, new NoneGatewayAllocator(), new BalancedShardsAllocator(settings));
}
@Inject
public ShardsAllocators(Settings settings, GatewayAllocator gatewayAllocator, ShardsAllocator allocator) {
super(settings);
this.gatewayAllocator = gatewayAllocator;
this.allocator = allocator;
}
@Override
public void applyStartedShards(StartedRerouteAllocation allocation) {
gatewayAllocator.applyStartedShards(allocation);
allocator.applyStartedShards(allocation);
}
@Override
public void applyFailedShards(FailedRerouteAllocation allocation) {
gatewayAllocator.applyFailedShards(allocation);
allocator.applyFailedShards(allocation);
}
@Override
public boolean allocateUnassigned(RoutingAllocation allocation) {
boolean changed = false;
changed |= gatewayAllocator.allocateUnassigned(allocation);
changed |= allocator.allocateUnassigned(allocation);
return changed;
}
@Override
public boolean rebalance(RoutingAllocation allocation) {
return allocator.rebalance(allocation);
}
@Override
public boolean move(MutableShardRouting shardRouting, RoutingNode node, RoutingAllocation allocation) {
return allocator.move(shardRouting, node, allocation);
}
}