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.cassandra.db.virtual;
  
  import java.util.Date;
  import java.util.Map;
  import java.util.stream.Collectors;
  
  import org.apache.cassandra.db.DecoratedKey;
  import org.apache.cassandra.db.marshal.TimeUUIDType;
  import org.apache.cassandra.schema.TableMetadata;
  import org.apache.cassandra.streaming.StreamManager;
  import org.apache.cassandra.streaming.StreamingState;
  import org.apache.cassandra.utils.TimeUUID;
  
  import static org.apache.cassandra.utils.LocalizeString.toLowerCaseLocalized;
  
  import static org.apache.cassandra.cql3.statements.schema.CreateTableStatement.parse;
  
  public class StreamingVirtualTable extends AbstractVirtualTable
  {
      public StreamingVirtualTable(String keyspace)
      {
          super(parse("CREATE TABLE streaming (" +
                      "  id timeuuid,\n" +
                      "  follower boolean,\n" +
                      "  operation text, \n" +
                      "  peers frozen<list<text>>,\n" +
                      "  status text,\n" +
                      "  progress_percentage float,\n" +
                      "  last_updated_at timestamp,\n" +
                      "  duration_millis bigint,\n" +
                      "  failure_cause text,\n" +
                      "  success_message text,\n" +
                      "\n" +
                      StreamingState.Sessions.columns() +
                      "\n" +
                      stateColumns() +
                      "\n" +
                      "PRIMARY KEY ((id))" +
                      ")", keyspace)
                .kind(TableMetadata.Kind.VIRTUAL)
                .build());
      }
  
      private static String stateColumns()
      {
          StringBuilder sb = new StringBuilder();
          for (StreamingState.Status state : StreamingState.Status.values())
              sb.append("  status_").append(toLowerCaseLocalized(state.name())).append("_timestamp timestamp,\n");
          return sb.toString();
      }
  
      @Override
      public DataSet data()
      {
          SimpleDataSet result = new SimpleDataSet(metadata());
          StreamManager.instance.getStreamingStates()
                                .forEach(s -> updateDataSet(result, s));
          return result;
      }
  
      @Override
      public DataSet data(DecoratedKey partitionKey)
      {
          TimeUUID id = TimeUUIDType.instance.compose(partitionKey.getKey());
          SimpleDataSet result = new SimpleDataSet(metadata());
          StreamingState state = StreamManager.instance.getStreamingState(id);
          if (state != null)
              updateDataSet(result, state);
          return result;
      }
  
      private void updateDataSet(SimpleDataSet ds, StreamingState state)
      {
          ds.row(state.id());
          ds.column("last_updated_at", new Date(state.lastUpdatedAtMillis())); // read early to see latest state
          ds.column("follower", state.follower());
          ds.column("operation", state.operation().getDescription());
          ds.column("peers", state.peers().stream().map(Object::toString).collect(Collectors.toList()));
          ds.column("status", toLowerCaseLocalized(state.status().name()));
          ds.column("progress_percentage", round(state.progress() * 100));
          ds.column("duration_millis", state.durationMillis());
          ds.column("failure_cause", state.failureCause());
          ds.column("success_message", state.successMessage());
          for (Map.Entry<StreamingState.Status, Long> e : state.stateTimesMillis().entrySet())
              ds.column("status_" + toLowerCaseLocalized(e.getKey().name()) + "_timestamp", new Date(e.getValue()));
  
          state.sessions().update(ds);
      }
  
      static float round(float value)
      {
          return Math.round(value * 100) / 100;
      }
  }
  