content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF 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 under the License.
   */
  package org.apache.beam.sdk.extensions.euphoria.core.client.accumulators;
  
  import java.io.Serializable;
  import org.apache.beam.sdk.Pipeline;
  import org.apache.beam.sdk.extensions.euphoria.core.annotation.audience.Audience;
  import org.apache.beam.sdk.extensions.euphoria.core.translate.EuphoriaOptions;
  
  /**
   * Provides access to an accumulator backend service. It is intended to be implemented by third
   * party to support different type of services.
   *
   * @deprecated Use Java SDK directly, Euphoria is scheduled for removal in a future release.
   */
  @Audience(Audience.Type.EXECUTOR)
  @Deprecated
  public interface AccumulatorProvider {
  
    static AccumulatorProvider.Factory of(Pipeline pipeline) {
      return pipeline.getOptions().as(EuphoriaOptions.class).getAccumulatorProviderFactory();
    }
  
    /**
     * Get an existing instance of a counter or create a new one.
     *
     * @param name Unique name of the counter.
     * @return Instance of a counter. @Deprecated use {@link #getCounter(String, String)} instead
     */
    Counter getCounter(String name);
  
    /**
     * Get an existing instance of a counter or create a new one.
     *
     * @param namespace of counter (e.g. operator name)
     * @param name of the counter
     * @return Instance of a counter.
     */
    Counter getCounter(String namespace, String name);
    /**
     * Get an existing instance of a histogram or create a new one.
     *
     * @param name Unique name of the histogram.
     * @return Instance of a histogram. @Deprecated use {@link #getHistogram(String, String)} instead
     */
    Histogram getHistogram(String name);
  
    /**
     * Get an existing instance of a histogram or create a new one.
     *
     * @param namespace of histogram (e.g. operator name)
     * @param name of the counter
     * @return Instance of a counter.
     */
    Histogram getHistogram(String namespace, String name);
  
    /**
     * Get an existing instance of a timer or create a new one.
     *
     * @param name Unique name of the timer.
     * @return Instance of a timer. @Deprecated use {@link #getHistogram(String, String)} instead
     */
    Timer getTimer(String name);
  
    /**
     * Creates a new instance of {@link AccumulatorProvider} initialized by given settings.
     *
     * <p>It is required this factory is thread-safe.
     */
    @FunctionalInterface
    interface Factory extends Serializable {
  
      AccumulatorProvider create();
    }
  }
  