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.apex.examples.frauddetect;
  
  import java.text.DecimalFormat;
  import java.util.HashMap;
  import java.util.Map;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import org.apache.apex.malhar.lib.util.KeyValPair;
  import org.apache.commons.lang.mutable.MutableDouble;
  import org.apache.commons.lang.mutable.MutableLong;
  
  import com.datatorrent.api.DefaultInputPort;
  import com.datatorrent.api.DefaultOutputPort;
  import com.datatorrent.common.util.BaseOperator;
  
  /**
   * A bucket-like operator to accept merchant transaction object and dissipate the
   * transaction amount to the further downstream operator for calculating min, max and std-deviation.
   *
   * @since 0.9.0
   */
  public class MerchantTransactionBucketOperator extends BaseOperator
  {
    private static final Logger logger = LoggerFactory.getLogger(MerchantTransactionBucketOperator.class);
    /*
    public final transient DefaultOutputPort<KeyValPair<MerchantKey, String>> binOutputPort =
            new DefaultOutputPort<KeyValPair<MerchantKey, String>>();
    */
    public final transient DefaultOutputPort<KeyValPair<KeyValPair<MerchantKey, String>, Integer>> binCountOutputPort =
        new DefaultOutputPort<KeyValPair<KeyValPair<MerchantKey, String>, Integer>>();
    public final transient DefaultOutputPort<KeyValPair<MerchantKey, Long>> txOutputPort =
        new DefaultOutputPort<KeyValPair<MerchantKey, Long>>();
    public final transient DefaultOutputPort<KeyValPair<MerchantKey, CreditCardData>> ccAlertOutputPort =
        new DefaultOutputPort<KeyValPair<MerchantKey, CreditCardData>>();
    public final transient DefaultOutputPort<Map<String, Object>> summaryTxnOutputPort =
        new DefaultOutputPort<Map<String, Object>>();
    private MutableLong totalTxns = new MutableLong(0);
    private MutableLong txnsInLastSecond = new MutableLong(0);
    private MutableDouble amtInLastSecond = new MutableDouble(0);
    private transient DecimalFormat amtFormatter = new DecimalFormat("#.##");
    public transient DefaultInputPort<MerchantTransaction> inputPort = new DefaultInputPort<MerchantTransaction>()
    {
      @Override
      public void process(MerchantTransaction tuple)
      {
        processTuple(tuple);
      }
  
    };
    public transient DefaultInputPort<MerchantTransaction> txUserInputPort = new DefaultInputPort<MerchantTransaction>()
    {
      @Override
      public void process(MerchantTransaction tuple)
      {
        processTuple(tuple);
      }
  
    };
  
    public void endWindow()
    {
      Map<String, Object> summary = new HashMap<String, Object>();
      double avg;
      if (txnsInLastSecond.longValue() == 0) {
        avg = 0;
      } else {
        avg = amtInLastSecond.doubleValue() / txnsInLastSecond.longValue();
      }
      summary.put("totalTxns", totalTxns);
      summary.put("txnsInLastSecond", txnsInLastSecond);
      summary.put("amtInLastSecond", amtFormatter.format(amtInLastSecond));
      summary.put("avgAmtInLastSecond", amtFormatter.format(avg));
      summaryTxnOutputPort.emit(summary);
      txnsInLastSecond.setValue(0);
      amtInLastSecond.setValue(0);
    }
  
    private void processTuple(MerchantTransaction tuple)
    {
      emitBankIdNumTuple(tuple, binCountOutputPort);
      emitMerchantKeyTuple(tuple, txOutputPort);
      emitCreditCardKeyTuple(tuple, ccAlertOutputPort);
      totalTxns.increment();
      txnsInLastSecond.increment();
      amtInLastSecond.add(tuple.amount);
    }
  
    private void emitMerchantKeyTuple(MerchantTransaction tuple, DefaultOutputPort<KeyValPair<MerchantKey, Long>> outputPort)
    {
      MerchantKey key = getMerchantKey(tuple);
      KeyValPair<MerchantKey, Long> keyValPair = new KeyValPair<MerchantKey, Long>(key, tuple.amount);
      outputPort.emit(keyValPair);
    }
  
    //private void emitBankIdNumTuple(MerchantTransaction tuple, DefaultOutputPort<KeyValPair<MerchantKey, String>> outputPort)
    private void emitBankIdNumTuple(MerchantTransaction tuple, DefaultOutputPort<KeyValPair<KeyValPair<MerchantKey, String>, Integer>> outputPort)
    {
      MerchantKey key = getMerchantKey(tuple);
      KeyValPair<MerchantKey, String> keyValPair = new KeyValPair<MerchantKey, String>(key, tuple.bankIdNum);
      outputPort.emit(new KeyValPair<KeyValPair<MerchantKey, String>, Integer>(keyValPair, 1));
    }
  
    private void emitCreditCardKeyTuple(MerchantTransaction tuple, DefaultOutputPort<KeyValPair<MerchantKey, CreditCardData>> outputPort)
    {
      MerchantKey key = getMerchantKey(tuple);
  
      CreditCardData data = new CreditCardData();
      data.fullCcNum = tuple.fullCcNum;
      data.amount = tuple.amount;
  
      KeyValPair<MerchantKey, CreditCardData> keyValPair = new KeyValPair<MerchantKey, CreditCardData>(key, data);
      outputPort.emit(keyValPair);
    }
  
    private MerchantKey getMerchantKey(MerchantTransaction tuple)
    {
      MerchantKey key = new MerchantKey();
      key.merchantId = tuple.merchantId;
      key.terminalId = tuple.terminalId;
      key.zipCode = tuple.zipCode;
      key.country = tuple.country;
      key.merchantType = tuple.merchantType;
      key.userGenerated = tuple.userGenerated;
      key.time = tuple.time;
      return key;
    }
  
  }
  