com.netflix.atlas.lwcapi.StreamSubscriptionManager.scala Maven / Gradle / Ivy

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/*
 * Copyright 2014-2024 Netflix, Inc.
 *
 * Licensed 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 com.netflix.atlas.lwcapi

import com.netflix.spectator.api.Registry

/**
  * Subclass of [[SubscriptionManager]] that uses a source queue for the handler. In some cases
  * with dependency injection erasure can cause problems with generic types. This class
  * is just to avoid those issues for the main use-cases where we need to inject a version
  * that needs a source queue.
  */
class StreamSubscriptionManager(registry: Registry)
    extends SubscriptionManager[QueueHandler](registry) {

  /**
    * Overwritten to ensure that when using a queue it will be completed and resources
    * for the stream will get cleaned up.
    */
  override def unregister(streamId: String): Option[QueueHandler] = {
    val tmp = super.unregister(streamId)
    tmp.foreach(_.complete())
    tmp
  }
}