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.triggers;
  
  import java.io.InputStream;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.Properties;
  
  import org.apache.cassandra.schema.TableMetadata;
  import org.apache.cassandra.schema.Schema;
  import org.apache.cassandra.db.Mutation;
  import org.apache.cassandra.db.partitions.Partition;
  import org.apache.cassandra.db.partitions.PartitionUpdate;
  import org.apache.cassandra.io.util.FileUtils;
  import org.apache.cassandra.utils.FBUtilities;
  import org.apache.cassandra.utils.TimeUUID;
  
  public class AuditTrigger implements ITrigger
  {
      private static final String AUDIT_PROPERTIES_FILE_NAME = "AuditTrigger.properties";
  
      private final Properties properties;
      private final String auditKeyspace;
      private final String auditTable;
  
      public AuditTrigger()
      {
          properties = loadProperties();
          auditKeyspace = properties.getProperty("keyspace");
          auditTable = properties.getProperty("table");
      }
  
      public Collection<Mutation> augment(Partition update)
      {
          TableMetadata metadata = Schema.instance.getTableMetadata(auditKeyspace, auditTable);
          PartitionUpdate.SimpleBuilder audit = PartitionUpdate.simpleBuilder(metadata, TimeUUID.Generator.nextTimeUUID());
  
          audit.row()
               .add("keyspace_name", update.metadata().keyspace)
               .add("table_name", update.metadata().name)
               .add("primary_key", update.metadata().partitionKeyType.getString(update.partitionKey().getKey()));
  
          return Collections.singletonList(audit.buildAsMutation());
      }
  
      private static Properties loadProperties()
      {
          Properties properties = new Properties();
          InputStream stream = AuditTrigger.class.getClassLoader().getResourceAsStream(AUDIT_PROPERTIES_FILE_NAME);
          try
          {
              properties.load(stream);
          }
          catch (Exception e)
          {
              throw new RuntimeException(e);
          }
          finally
          {
              FileUtils.closeQuietly(stream);
          }
          return properties;
      }
  }
  