content: /*
   * Tencent is pleased to support the open source community by making Angel available.
   *
   * Copyright (C) 2017-2018 THL A29 Limited, a Tencent company. All rights reserved.
   *
   * 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
   *
   * https://opensource.org/licenses/Apache-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.tencent.angel.ps.storage.partition.op;
  
  import com.tencent.angel.common.Serialize;
  import com.tencent.angel.common.StreamSerialize;
  import com.tencent.angel.ml.matrix.psf.update.base.PartitionUpdateParam;
  import com.tencent.angel.ml.matrix.psf.update.base.UpdateFunc;
  import com.tencent.angel.ps.server.data.request.UpdateOp;
  import io.netty.buffer.ByteBuf;
  
  /**
   * Basic operation for partition storage
   */
  public interface IGeneralServerPartitionOp extends Serialize, StreamSerialize {
  
    /**
     * Init the storage
     */
    void init();
  
    /**
     * Reset the storage
     */
    void reset();
  
    /**
     * Update the partition use PSF
     *
     * @param func update PSF
     * @param partParam update PSF param
     */
    void update(UpdateFunc func, PartitionUpdateParam partParam);
  
    /**
     * Update the partition use pipeline mode
     *
     * @param buf input buf
     * @param op update method
     */
    void update(ByteBuf buf, UpdateOp op);
  
    /**
     * Get total element number in partition
     * @return total element in partition
     */
    long getElemNum();
  
    /**
     * Get data Size
     * @return
     */
    long dataSize();
  }
  