| /** |
| * 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; |
| } |
| |
| } |