| /* |
| * Copyright (c) 2013 DataTorrent, Inc. ALL Rights Reserved. |
| * |
| * Licensed 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 com.datatorrent.demos.frauddetect; |
| |
| import com.datatorrent.api.BaseOperator; |
| import com.datatorrent.api.DefaultInputPort; |
| import com.datatorrent.api.DefaultOutputPort; |
| import com.datatorrent.lib.util.KeyValPair; |
| import com.datatorrent.demos.frauddetect.util.JsonUtils; |
| import org.apache.commons.lang.mutable.MutableLong; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import org.codehaus.jackson.JsonFactory; |
| import org.codehaus.jackson.map.ObjectMapper; |
| |
| /** |
| * Count the transactions for the underlying aggregation window if the same BIN is |
| * being used for more than defined number of transactions. Output the data as needed |
| * by Mongo output operator |
| * |
| * @since 0.9.0 |
| */ |
| public class BankIdNumberSamplerOperator extends BaseOperator |
| { |
| private transient final JsonFactory jsonFactory = new JsonFactory(); |
| private transient final ObjectMapper mapper = new ObjectMapper(jsonFactory); |
| private int threshold; |
| private Map<MerchantKey, Map<String, BankIdNumData>> bankIdNumCountMap = new HashMap<MerchantKey, Map<String, BankIdNumData>>(); |
| private static final String ALERT_MSG = |
| "Potential fraudulent CC transactions (same bank id %s and merchant %s) total transactions: %d"; |
| /** |
| * Output the key-value pair for the BIN as key with the count as value. |
| */ |
| public final transient DefaultOutputPort<String> countAlertOutputPort = |
| new DefaultOutputPort<String>(); |
| public final transient DefaultOutputPort<Map<String, Object>> countAlertNotificationPort = |
| new DefaultOutputPort<Map<String, Object>>(); |
| |
| public int getThreshold() |
| { |
| return threshold; |
| } |
| |
| public void setThreshold(int threshold) |
| { |
| this.threshold = threshold; |
| } |
| |
| /* |
| public final transient DefaultInputPort<KeyValPair<MerchantKey, String>> txInputPort = |
| new DefaultInputPort<KeyValPair<MerchantKey, String>>() |
| { |
| @Override |
| public void process(KeyValPair<MerchantKey, String> tuple) |
| { |
| processTuple(tuple); |
| } |
| |
| }; |
| |
| private void processTuple(KeyValPair<MerchantKey, String> tuple) |
| { |
| MerchantKey key = tuple.getKey(); |
| Map<String, BankIdNumData> map = bankIdNumCountMap.get(key); |
| if (map == null) { |
| map = new HashMap<String, BankIdNumData>(); |
| bankIdNumCountMap.put(key, map); |
| } |
| String bankIdNum = tuple.getValue(); |
| BankIdNumData bankIdNumData = map.get(bankIdNum); |
| if (bankIdNumData == null) { |
| bankIdNumData = new BankIdNumData(); |
| bankIdNumData.bankIdNum = bankIdNum; |
| map.put(bankIdNum, bankIdNumData); |
| } |
| bankIdNumData.count.increment(); |
| if (key.userGenerated) { |
| bankIdNumData.userGenerated = true; |
| } |
| } |
| */ |
| |
| public final transient DefaultInputPort<KeyValPair<KeyValPair<MerchantKey, String>, Integer>> txCountInputPort = |
| new DefaultInputPort<KeyValPair<KeyValPair<MerchantKey, String>, Integer>>() |
| { |
| @Override |
| public void process(KeyValPair<KeyValPair<MerchantKey, String>, Integer> tuple) |
| { |
| processTuple(tuple.getKey(), tuple.getValue()); |
| } |
| |
| }; |
| |
| private void processTuple(KeyValPair<MerchantKey, String> tuple, Integer count) |
| { |
| MerchantKey key = tuple.getKey(); |
| Map<String, BankIdNumData> map = bankIdNumCountMap.get(key); |
| if (map == null) { |
| map = new HashMap<String, BankIdNumData>(); |
| bankIdNumCountMap.put(key, map); |
| } |
| String bankIdNum = tuple.getValue(); |
| BankIdNumData bankIdNumData = map.get(bankIdNum); |
| if (bankIdNumData == null) { |
| bankIdNumData = new BankIdNumData(); |
| bankIdNumData.bankIdNum = bankIdNum; |
| map.put(bankIdNum, bankIdNumData); |
| } |
| bankIdNumData.count.setValue(count); |
| if (key.userGenerated) { |
| bankIdNumData.userGenerated = true; |
| } |
| } |
| |
| /** |
| * Go through the BIN Counter map and check if any of the values for the BIN exceed the threshold. |
| * If yes, generate the alert on the output port. |
| */ |
| @Override |
| public void endWindow() |
| { |
| for (Map.Entry<MerchantKey, Map<String, BankIdNumData>> entry : bankIdNumCountMap.entrySet()) { |
| List<BankIdNumData> list = null; |
| MerchantKey key = entry.getKey(); |
| if (key.merchantType == MerchantTransaction.MerchantType.INTERNET) { |
| continue; |
| } |
| list = dataOutput(entry.getValue()); |
| if (list.size() > 0) { |
| for (BankIdNumData binData : list) { |
| BankIdNumberAlertData data = new BankIdNumberAlertData(); |
| data.merchantId = key.merchantId; |
| data.terminalId = key.terminalId == null ? 0 : key.terminalId; |
| data.zipCode = key.zipCode; |
| data.merchantType = key.merchantType; |
| data.bankIdNum = binData.bankIdNum; |
| data.count = binData.count.intValue(); |
| data.userGenerated = binData.userGenerated; |
| data.time = System.currentTimeMillis(); |
| try { |
| countAlertOutputPort.emit(JsonUtils.toJson(data)); |
| countAlertNotificationPort.emit(getOutputData(data)); |
| } |
| catch (IOException e) { |
| logger.warn("Exception while converting object to JSON: ", e); |
| } |
| } |
| } |
| } |
| bankIdNumCountMap.clear(); |
| } |
| |
| private List<BankIdNumData> dataOutput(Map<String, BankIdNumData> map) |
| { |
| List<BankIdNumData> list = new ArrayList<BankIdNumData>(); |
| int count = 0; |
| for (Map.Entry<String, BankIdNumData> bankIdEntry : map.entrySet()) { |
| BankIdNumData data = bankIdEntry.getValue(); |
| if (data.count.intValue() > threshold) { |
| list.add(data); |
| } |
| } |
| return list; |
| } |
| |
| private Map<String, Object> getOutputData(BankIdNumberAlertData data) |
| { |
| Map<String, Object> output = new HashMap<String, Object>(); |
| output.put("message", String.format(ALERT_MSG, data.bankIdNum, data.merchantId, data.count)); |
| output.put("alertType", "sameBankId"); |
| output.put("userGenerated", "" + data.userGenerated); |
| output.put("alertData", data); |
| |
| try { |
| String str = mapper.writeValueAsString(output); |
| logger.debug("user generated tx alert: " + str); |
| } |
| catch (Exception exc) { |
| //ignore |
| } |
| |
| return output; |
| } |
| |
| public final static class BankIdNumData |
| { |
| public String bankIdNum; |
| public MutableLong count = new MutableLong(); |
| public boolean userGenerated = false; |
| } |
| |
| private static final Logger logger = LoggerFactory.getLogger(BankIdNumberSamplerOperator.class); |
| } |