AA:{“canx_reason_code”:”AA”,”canx_reason”:”Waiting acceptance into off Network Terminal or Yard”} AC:{“canx_reason_code”:”AC”,”canx_reason”:”Waiting train preparation or completion of TOPS list/RT3973”} AE:{“canx_reason_code”:”AE”,”canx_reason”:”Congestion in off Network Terminal or Yard”} AG:{“canx_reason_code”:”AG”,”canx_reason”:”Wagon load incident including adjusting loads or open door”} AJ:{“canx_reason_code”:”AJ”,”canx_reason”:”Waiting Customer’s traffic including documentation”} DA:{“canx_reason_code”:”DA”,”canx_reason”:”Non Technical Fleet Holding Code”} DB:{“canx_reason_code”:”DB”,”canx_reason”:”Train Operations Holding Code”} DC:{“canx_reason_code”:”DC”,”canx_reason”:”Train Crew Causes Holding Code”} DD:{“canx_reason_code”:”DD”,”canx_reason”:”Technical Fleet Holding Code”} DE:{“canx_reason_code”:”DE”,”canx_reason”:”Station Causes Holding Code”} DF:{“canx_reason_code”:”DF”,”canx_reason”:”External Causes Holding Code”} DG:{“canx_reason_code”:”DG”,”canx_reason”:”Freight Terminal and or Yard Holding Code”} DH:{“canx_reason_code”:”DH”,”canx_reason”:”Adhesion and or Autumn Holding Code”} FA:{“canx_reason_code”:”FA”,”canx_reason”:”Dangerous goods incident”} FC:{“canx_reason_code”:”FC”,”canx_reason”:”Freight train driver”} kafkacat -l canx_reason_code.dat -b localhost:9092 -t canx_reason_code -P -K: @rmoff | @confluentinc

Decode values, and generate composite key +———————-+————————+————-+——————————-+————————+————————————+ | CIF_train_uid | sched_start_dt | stp_ind | SCHEDULE_KEY | CIF_power_type | POWER_TYPE | +———————-+————————+————-+——————————-+————————+————————————+ | Y82535 | 2019-05-20 | P | Y82535/2019-05-20/P | E | Electric | | Y82537 | 2019-05-20 | P | Y82537/2019-05-20/P | DMU | Other | | Y82542 | 2019-05-20 | P | Y82542/2019-05-20/P | D | Diesel | | Y82535 | 2019-05-24 | P | Y82535/2019-05-24/P | EMU | Electric Multiple Unit | | Y82542 | 2019-05-24 | P | Y82542/2019-05-24/P | HST | High Speed Train | SELECT JsonScheduleV1->CIF_train_uid + ‘/’ + JsonScheduleV1->schedule_start_date + ‘/’ + JsonScheduleV1->CIF_stp_indicator AS SCHEDULE_KEY, CASE WHEN JsonScheduleV1->schedule_segment->CIF_power_type = ‘D’ THEN ‘Diesel’ WHEN JsonScheduleV1->schedule_segment->CIF_power_type = ‘E’ THEN ‘Electric’ WHEN JsonScheduleV1->schedule_segment->CIF_power_type = ‘ED’ THEN ‘Electro-Diesel’ END AS POWER_TYPE @rmoff | @confluentinc

Flatten and re-key a stream { CREATE STREAM TIPLOC_FLAT_KEYED SELECT TiplocV1->TRANSACTION_TYPE TiplocV1->TIPLOC_CODE TiplocV1->NALCO TiplocV1->STANOX TiplocV1->CRS_CODE TiplocV1->DESCRIPTION TiplocV1->TPS_DESCRIPTION FROM SCHEDULE_RAW PARTITION BY TIPLOC_CODE; y e e g k n g a n h i C n ksql> DESCRIBE TIPLOC_FLAT_KEYED; io t i art “TiplocV1”: { “transaction_type”: “Create”, “tiploc_code”: “ABWD”, “nalco”: “513100”, “stanox”: “88601”, “crs_code”: “ABW”, “description”: “ABBEY WOOD”, “tps_description”: “ABBEY WOOD” } } p Access nested element AS AS AS AS AS AS AS TRANSACTION_TYPE , TIPLOC_CODE , NALCO , STANOX , CRS_CODE , DESCRIPTION , TPS_DESCRIPTION Name : TIPLOC_FLAT_KEYED Field | Type ——————————————————————-TRANSACTION_TYPE | VARCHAR(STRING) TIPLOC_CODE | VARCHAR(STRING) NALCO | VARCHAR(STRING) STANOX | VARCHAR(STRING) CRS_CODE | VARCHAR(STRING) DESCRIPTION | VARCHAR(STRING) TPS_DESCRIPTION | VARCHAR(STRING) @rmoff | @confluentinc ———————————————————————

But do you even need a database? TRAIN_MOVEMENTS Time Time SELECT TIMESTAMPTOSTRING(WINDOWSTART(),’yyyy-MM-dd’) AS WINDOW_START_TS, VARIATION_STATUS, SUM(CASE WHEN TOC = ‘Arriva Trains Northern’ THEN 1 ELSE 0 END) AS Arriva_CT, SUM(CASE WHEN TOC = ‘East Midlands Trains’ THEN 1 ELSE 0 END) AS EastMidlands_CT, SUM(CASE WHEN TOC = ‘London North Eastern Railway’ THEN 1 ELSE 0 END) AS LNER_CT, SUM(CASE WHEN TOC = ‘TransPennine Express’ THEN 1 ELSE 0 END) AS TransPennineExpress_CT FROM TRAIN_MOVEMENTS WINDOW TUMBLING (SIZE 1 DAY) GROUP BY VARIATION_STATUS; +——————+——————-+————+—————+———+———-+ | Date | Variation | Arriva | East Mid | LNER | TPE | +——————+——————-+————+—————+———+———-+ | 2019-07-02 | OFF ROUTE | 46 | 78 | 20 | 167 | | 2019-07-02 | ON TIME | 19083 | 3568 | 1509 | 2916 | TOC_STATS | 2019-07-02 | LATE | 30850 | 7953 | 5420 | 9042 | | 2019-07-02 | EARLY | 11478 | 3518 | 1349 | 2096 | Aggregate | 2019-07-03 | OFF ROUTE | 79 | 25 | 41 | 213 | Aggregate | 2019-07-03 | ON TIME | 19512 | 4247 | 1915 | 2936 | | 2019-07-03 | LATE | 37357 | 8258 | 5342 | 11016 | | 2019-07-03 | EARLY | 11825 | 4574 | 1888 | 2094 | @rmoff | @confluentinc

{ Kafka -> S3 “connector.class”: “io.confluent.connect.s3.S3SinkConnector”, “key.converter”:”org.apache.kafka.connect.storage.StringConverter”, “tasks.max”: “1”, “topics”: “TRAIN_MOVEMENTS_ACTIVATIONS_SCHEDULE_00”, “s3.region”: “us-west-2”, “s3.bucket.name”: “rmoff-rail-streaming-demo”, “flush.size”: “65536”, “storage.class”: “io.confluent.connect.s3.storage.S3Storage”, “format.class”: “io.confluent.connect.s3.format.avro.AvroFormat”, “schema.generator.class”: “io.confluent.connect.storage.hive.schema.DefaultSchemaGenerator”, “schema.compatibility”: “NONE”, “partitioner.class”: “io.confluent.connect.storage.partitioner.TimeBasedPartitioner”, “path.format”:“‘year’=YYYY/’month’=MM/’day’=dd”, “timestamp.extractor”:”Record”, “partition.duration.ms”: 1800000, “locale”:”en”, “timezone”: “UTC” } @rmoff | @confluentinc

Graph analysis { “connector.class”: “streams.kafka.connect.sink.Neo4jSinkConnector”, “topics”: “TRAIN_CANCELLATIONS_02”, “key.converter”:”org.apache.kafka.connect.storage.StringConverter”, “errors.tolerance”: “all”, “errors.deadletterqueue.topic.name”: “sink-neo4j-train-00_dlq”, “errors.deadletterqueue.topic.replication.factor”: 1, “errors.deadletterqueue.context.headers.enable”:true, “neo4j.server.uri”: “bolt://neo4j:7687”, “neo4j.authentication.basic.username”: “neo4j”, “neo4j.authentication.basic.password”: “connect”, “neo4j.topic.cypher.TRAIN_CANCELLATIONS_02”: “MERGE (train:train{id: event.TRAIN_ID}) MERGE (toc:toc{toc: event.TOC}) MERGE (canx_reason:canx_reason{reason: event.CANX_REASON}) MERGE (canx_loc:canx_loc{location: coalesce(event.CANCELLATION_LOCATION,’<unknown>’)}) MERGE (train)[:OPERATED_BY]->(toc) MERGE (canx_loc)<-[:CANCELLED_AT{reason:event.CANX_REASON, time:event.CANX_TIMESTAMP}]-(train)-[:CANCELLED_BECAUSE]->(canx_reason)” } @rmoff | @confluentinc

Sending messages to Telegram curl -X POST -H ‘Content-Type: application/json’ -d ‘{“chat_id”: “-364377679”, “text”: “This is a test from curl”}’ https://api.telegram.org/botxxxxx/sendMessage { “connector.class”: “io.confluent.connect.http.HttpSinkConnector”, “request.method”: “post”, “http.api.url”: “https://api.telegram.org/[…]/sendMessage”, “headers”: “Content-Type: application/json”, “topics”: “TRAINS_DELAYED_ALERT_TG”, “tasks.max”: “1”, “batch.prefix”: “{“chat_id”:”-364377679”,”parse_mode”: “markdown”,”, “batch.suffix”: “}”, “batch.max.size”: “1”, “regex.patterns”:”.\{MESSAGE=(.)\}.*”, “regex.replacements”: “”text”:”$1”“, “regex.separator”: “~”, “key.converter”: “org.apache.kafka.connect.storage.StringConverter” } Kafka Kafka Connect HTTP Sink Telegram @rmoff | @confluentinc

@rmoff @confluentinc Restart failing connectors rmoff@proxmox01 > crontab -l “*/5 * * * * /home/rmoff/restart_failed_connector_tasks.sh rmoff@proxmox01 > cat /home/rmoff/restart_failed_connector_tasks.sh “#!/usr/bin/env bash # @rmoff / June 6, 2019

Restart any connector tasks that are FAILED curl -s “http:”//localhost:8083/connectors” | \ jq ‘.[]’ | \ xargs -I{connector_name} curl -s “http:”//localhost:8083/connectors/”{connector_name}”/status” | \ jq -c -M ‘[select(.tasks[].state”==”FAILED”) | .name,”§±§”,.tasks[].id]’ | \ grep -v “[]”| \ sed -e ‘s/^[“”//g’| sed -e ‘s/”,”§±§”,//tasks”//g’|sed -e ‘s/]$”//g’| \ xargs -I{connector_and_task} curl -X POST “http:”//localhost:8083/connectors/”{connector_and_task}”/ restart”

🚂 On Track with Apache Kafka: Building a Streaming ETL solution with Rail Data