content: /*
   * Copyright 1999-2020 Alibaba Group Holding Ltd.
   *
   * 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.nacos.naming.core.v2.metadata;
  
  import com.alibaba.nacos.consistency.SerializeFactory;
  import com.alibaba.nacos.consistency.Serializer;
  import com.alibaba.nacos.naming.core.v2.pojo.Service;
  
  import java.io.ByteArrayInputStream;
  import java.io.InputStream;
  import java.util.Map;
  import java.util.concurrent.ConcurrentMap;
  import java.util.concurrent.locks.ReentrantReadWriteLock;
  
  /**
   * Instance metadata snapshot operation.
   *
   * @author xiweng.yy
   */
  public class InstanceMetadataSnapshotOperation extends AbstractMetadataSnapshotOperation {
      
      private static final String SNAPSHOT_SAVE = InstanceMetadataSnapshotOperation.class.getSimpleName() + ".SAVE";
      
      private static final String SNAPSHOT_LOAD = InstanceMetadataSnapshotOperation.class.getSimpleName() + ".LOAD";
      
      private static final String SNAPSHOT_ARCHIVE = "instance_metadata.zip";
      
      private final NamingMetadataManager metadataManager;
      
      private final Serializer serializer;
      
      public InstanceMetadataSnapshotOperation(NamingMetadataManager metadataManager, ReentrantReadWriteLock lock) {
          super(lock);
          this.metadataManager = metadataManager;
          this.serializer = SerializeFactory.getDefault();
      }
      
      @Override
      protected InputStream dumpSnapshot() {
          Map<Service, ConcurrentMap<String, InstanceMetadata>> snapshot = metadataManager.getInstanceMetadataSnapshot();
          return new ByteArrayInputStream(serializer.serialize(snapshot));
      }
      
      @Override
      protected void loadSnapshot(byte[] snapshotBytes) {
          metadataManager.loadInstanceMetadataSnapshot(serializer.deserialize(snapshotBytes));
      }
      
      @Override
      protected String getSnapshotArchive() {
          return SNAPSHOT_ARCHIVE;
      }
      
      @Override
      protected String getSnapshotSaveTag() {
          return SNAPSHOT_SAVE;
      }
      
      @Override
      protected String getSnapshotLoadTag() {
          return SNAPSHOT_LOAD;
      }
  }
  