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Beam IO for Google Cloud Pub/Sub Lite

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/*
 * Copyright 2020 Google LLC
 *
 * 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.google.cloud.pubsublite.beam;

import com.google.cloud.pubsublite.proto.SequencedMessage;
import java.io.Serializable;
import org.apache.beam.sdk.io.range.OffsetRange;
import org.apache.beam.sdk.transforms.DoFn.OutputReceiver;
import org.apache.beam.sdk.transforms.splittabledofn.RestrictionTracker;

interface SubscriptionPartitionProcessorFactory extends Serializable {
  long serialVersionUID = 765145146544654L;

  SubscriptionPartitionProcessor newProcessor(
      SubscriptionPartition subscriptionPartition,
      RestrictionTracker tracker,
      OutputReceiver receiver);
}