io.druid.indexing.overlord.setup.WorkerBehaviorConfig Maven / Gradle / Ivy
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* Licensed to Metamarkets Group Inc. (Metamarkets) under one
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* 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,
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package io.druid.indexing.overlord.setup;
import com.fasterxml.jackson.annotation.JsonSubTypes;
import com.fasterxml.jackson.annotation.JsonTypeInfo;
import io.druid.guice.annotations.ExtensionPoint;
/**
* Outside of {@link io.druid.indexing.overlord.autoscaling.PendingTaskBasedWorkerProvisioningStrategy} and
* {@link io.druid.indexing.overlord.autoscaling.SimpleWorkerProvisioningStrategy}, WorkerBehaviorConfig is used only
* in {@link io.druid.indexing.overlord.TaskRunner}, and only {@link #getSelectStrategy()} method is used. That is why
* the WorkerBehaviorConfig's interface is minimized to just this method. PendingTaskBasedWorkerProvisioningStrategy and
* SimpleWorkerProvisioningStrategy are written to work only with {@link DefaultWorkerBehaviorConfig}. Extension-defined
* WorkerBehaviorConfig implementations should likely be used with different extension-defined {@link
* io.druid.indexing.overlord.autoscaling.ProvisioningStrategy} implementations as well.
*/
@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, property = "type", defaultImpl = DefaultWorkerBehaviorConfig.class)
@JsonSubTypes(value = {
@JsonSubTypes.Type(name = "default", value = DefaultWorkerBehaviorConfig.class)
})
@ExtensionPoint
public interface WorkerBehaviorConfig
{
String CONFIG_KEY = "worker.config";
WorkerSelectStrategy DEFAULT_STRATEGY = new EqualDistributionWorkerSelectStrategy(null);
WorkerSelectStrategy getSelectStrategy();
}