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,
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   * See the License for the specific language governing permissions and
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  package org.apache.cassandra.utils.logging;
  
  import ch.qos.logback.classic.spi.LoggingEvent;
  import org.apache.cassandra.db.virtual.SlowQueriesTable;
  
  public final class SlowQueriesAppender extends AbstractVirtualTableAppender
  {
      public static final String APPENDER_NAME = "SLOW_QUERIES_APPENDER";
  
      private SlowQueriesTable slowQueries;
  
      public SlowQueriesAppender()
      {
          super(SlowQueriesTable.LOGS_VIRTUAL_TABLE_DEFAULT_ROWS);
      }
  
      @Override
      protected void append(LoggingEvent eventObject)
      {
          // slowQueries will be null as long as virtual tables
          // are not registered, and we already try to put queries there.
          // As soon as vtable is registered (as part of node's startup / initialisation),
          // slow queries will never be null again
          slowQueries = appendToVirtualTable(SlowQueriesTable.class, slowQueries, eventObject, SlowQueriesTable.TABLE_NAME);
      }
  }
  