content: /*
   * Copyright 2021 Alibaba Group Holding Limited.
   *
   * 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.alibaba.graphscope.parallel.message;
  
  import com.alibaba.graphscope.fragment.IFragment;
  
  import org.apache.giraph.conf.ImmutableClassesGiraphConfiguration;
  import org.apache.giraph.conf.MessageClasses;
  import org.apache.hadoop.io.Writable;
  import org.apache.hadoop.io.WritableComparable;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class DefaultMessageStoreFactory<I extends WritableComparable, M extends Writable, GS_VID_T>
          implements MessageStoreFactory<I, M, MessageStore<I, M, GS_VID_T>> {
  
      private static Logger logger = LoggerFactory.getLogger(DefaultMessageStoreFactory.class);
  
      private IFragment<?, GS_VID_T, ?, ?> fragment;
      private ImmutableClassesGiraphConfiguration<I, ?, ?> conf;
  
      /**
       * Creates new message store.
       *
       * @param messageClasses Message classes information to be held in the store
       * @return New message store
       */
      @Override
      public MessageStore<I, M, GS_VID_T> newStore(MessageClasses<I, M> messageClasses) {
          logger.info("Using default Message store");
          return new DefaultMessageStore<I, M, GS_VID_T>(fragment, conf);
      }
  
      /**
       * Implementation class should use this method of initialization of any required internal
       * state.
       *
       * @param fragment fragment used for partition querying
       * @param conf     Configuration
       */
      @Override
      public void initialize(IFragment fragment, ImmutableClassesGiraphConfiguration<I, ?, ?> conf) {
          this.fragment = fragment;
          this.conf = conf;
      }
  }
  