GitHub Events Stream

Steps for setting up a Pinot cluster and a realtime table which consumes from the GitHub events stream.
Pull Request Merged Events Stream
In this recipe, we will
Set up a Pinot cluster, in the steps
a. Start zookeeper
b. Start controller
c. Start broker
d. Start server
Set up a Kafka cluster
Create a Kafka topic - pullRequestMergedEvents
Create a realtime table - pullRequestMergedEvents and a schema
Start a task which reads from GitHub events API and publishes events about merged pull requests to the topic.
Query the realtime data
Steps
Using Docker images or Launcher Scripts
Docker
Launcher scripts
Docker
Pull docker image
Get the latest Docker image.
export PINOT_VERSION=latest
export PINOT_IMAGE=apachepinot/pinot:${PINOT_VERSION}
docker pull ${PINOT_IMAGE}
Long Version
Set up the Pinot cluster
Follow the instructions in Advanced Pinot Setup to setup the Pinot cluster with the components:
Zookeeper
Controller
Broker
Server
Kafka
Create a Kafka topic
Create a Kafka topic called pullRequestMergedEvents for the demo.
docker exec \
  -t kafka \
  /opt/kafka/bin/kafka-topics.sh \
  --zookeeper pinot-zookeeper:2181/kafka \
  --partitions=1 --replication-factor=1 \
  --create --topic pullRequestMergedEvents
Add Pinot table and schema
The schema is present at examples/stream/githubEvents/pullRequestMergedEvents_schema.json and is also pasted below
pullRequestMergedEvents_schema.json
{
  "schemaName": "pullRequestMergedEvents",
  "dimensionFieldSpecs": [
    {
      "name": "title",
      "dataType": "STRING",
      "defaultNullValue": ""
    },
    {
      "name": "labels",
      "dataType": "STRING",
      "singleValueField": false,
      "defaultNullValue": ""
    },
    {
      "name": "userId",
      "dataType": "STRING",
      "defaultNullValue": ""
    },
    {
      "name": "userType",
      "dataType": "STRING",
      "defaultNullValue": ""
    },
    {
      "name": "authorAssociation",
      "dataType": "STRING",
      "defaultNullValue": ""
    },
    {
      "name": "mergedBy",
      "dataType": "STRING",
      "defaultNullValue": ""
    },
    {
      "name": "assignees",
      "dataType": "STRING",
      "singleValueField": false,
      "defaultNullValue": ""
    },
    {
      "name": "authors",
      "dataType": "STRING",
      "singleValueField": false,
      "defaultNullValue": ""
    },
    {
      "name": "committers",
      "dataType": "STRING",
      "singleValueField": false,
      "defaultNullValue": ""
    },
    {
      "name": "requestedReviewers",
      "dataType": "STRING",
      "singleValueField": false,
      "defaultNullValue": ""
    },
    {
      "name": "requestedTeams",
      "dataType": "STRING",
      "singleValueField": false,
      "defaultNullValue": ""
    },
    {
      "name": "reviewers",
      "dataType": "STRING",
      "singleValueField": false,
      "defaultNullValue": ""
    },
    {
      "name": "commenters",
      "dataType": "STRING",
      "singleValueField": false,
      "defaultNullValue": ""
    },
    {
      "name": "repo",
      "dataType": "STRING",
      "defaultNullValue": ""
    },
    {
      "name": "organization",
      "dataType": "STRING",
      "defaultNullValue": ""
    }
  ],
  "metricFieldSpecs": [
    {
      "name": "count",
      "dataType": "LONG",
      "defaultNullValue": 1
    },
    {
      "name": "numComments",
      "dataType": "LONG"
    },
    {
      "name": "numReviewComments",
      "dataType": "LONG"
    },
    {
      "name": "numCommits",
      "dataType": "LONG"
    },
    {
      "name": "numLinesAdded",
      "dataType": "LONG"
    },
    {
      "name": "numLinesDeleted",
      "dataType": "LONG"
    },
    {
      "name": "numFilesChanged",
      "dataType": "LONG"
    },
    {
      "name": "numAuthors",
      "dataType": "LONG"
    },
    {
      "name": "numCommitters",
      "dataType": "LONG"
    },
    {
      "name": "numReviewers",
      "dataType": "LONG"
    },
    {
      "name": "numCommenters",
      "dataType": "LONG"
    },
    {
      "name": "createdTimeMillis",
      "dataType": "LONG"
    },
    {
      "name": "elapsedTimeMillis",
      "dataType": "LONG"
    }
  ],
  "timeFieldSpec": {
    "incomingGranularitySpec": {
      "timeType": "MILLISECONDS",
      "timeFormat": "EPOCH",
      "dataType": "LONG",
      "name": "mergedTimeMillis"
    }
  }
}
​
The table config is present at examples/stream/githubEvents/docker/pullRequestMergedEvents_realtime_table_config.json and is also pasted below.
Note
If you're setting this up on a pre-configured cluster, set the properties stream.kafka.zk.broker.url and stream.kafka.broker.list correctly, depending on the configuration of your Kafka cluster. 
pullRequestMergedEvents_realtime_table_config.json
{
  "tableName": "pullRequestMergedEvents",
  "tableType": "REALTIME",
  "segmentsConfig": {
    "timeColumnName": "mergedTimeMillis",
    "timeType": "MILLISECONDS",
    "retentionTimeUnit": "DAYS",
    "retentionTimeValue": "60",
    "schemaName": "pullRequestMergedEvents",
    "replication": "1",
    "replicasPerPartition": "1"
  },
  "tenants": {},
  "tableIndexConfig": {
    "loadMode": "MMAP",
    "invertedIndexColumns": [
      "organization",
      "repo"
    ],
    "streamConfigs": {
      "streamType": "kafka",
      "stream.kafka.consumer.type": "simple",
      "stream.kafka.topic.name": "pullRequestMergedEvents",
      "stream.kafka.decoder.class.name": "org.apache.pinot.plugin.stream.kafka.KafkaJSONMessageDecoder",
      "stream.kafka.consumer.factory.class.name": "org.apache.pinot.plugin.stream.kafka20.KafkaConsumerFactory",
      "stream.kafka.zk.broker.url": "pinot-zookeeper:2181/kafka",
      "stream.kafka.broker.list": "kafka:9092",
      "realtime.segment.flush.threshold.time": "12h",
      "realtime.segment.flush.threshold.size": "100000",
      "stream.kafka.consumer.prop.auto.offset.reset": "smallest"
    }
  },
  "metadata": {
    "customConfigs": {}
  }
}
Add the table and schema using the following command
$ docker run \
    --network=pinot-demo \
    --name pinot-streaming-table-creation \
    ${PINOT_IMAGE} AddTable \
    -schemaFile examples/stream/githubEvents/pullRequestMergedEvents_schema.json \
    -tableConfigFile examples/stream/githubEvents/docker/pullRequestMergedEvents_realtime_table_config.json \
    -controllerHost pinot-controller \
    -controllerPort 9000 \
    -exec
Executing command: AddTable -tableConfigFile examples/stream/githubEvents/docker/pullRequestMergedEvents_realtime_table_config.json -schemaFile examples/stream/githubEvents/pullRequestMergedEvents_schema.json -controllerHost pinot-controller -controllerPort 9000 -exec
Sending request: http://pinot-controller:9000/schemas to controller: 20c241022a96, version: Unknown
{"status":"Table pullRequestMergedEvents_REALTIME succesfully added"}
Publish events
Start streaming GitHub events into the Kafka topic
Prerequisites
Generate a personal access token on GitHub.
$ docker run --rm -ti \
    --network=pinot-demo \
    --name pinot-github-events-into-kafka \
    -d ${PINOT_IMAGE} StreamGitHubEvents \
    -schemaFile examples/stream/githubEvents/pullRequestMergedEvents_schema.json \
    -topic pullRequestMergedEvents \
    -personalAccessToken <your_github_personal_access_token> \
    -kafkaBrokerList kafka:9092
Short Version
For a single command to setup all the above steps, use the following command. Make sure to stop any previous running Pinot services.
$ docker run --rm -ti \
    --network=pinot-demo \
    --name pinot-github-events-quick-start \
     ${PINOT_IMAGE} GitHubEventsQuickStart \
    -personalAccessToken <your_github_personal_access_token> 
Launcher scripts
Get Pinot
Follow instructions in Build from source to get the latest Pinot code
Long Version
Set up the Pinot cluster
Follow the instructions in Advanced Pinot Setup to setup the Pinot cluster with the components:
Zookeeper
Controller
Broker
Server
Kafka
Create a Kafka topic
Download Apache Kafka release. 
Create a Kafka topic called pullRequestMergedEvents for the demo.
$ bin/kafka-topics.sh \
  --create \
  --bootstrap-server localhost:19092 \
  --replication-factor 1 \
  --partitions 1 \
  --topic pullRequestMergedEvents
Add Pinot table and schema
Schema can be found at  /examples/stream/githubevents/ in the release, and is also pasted below:
{
  "schemaName": "pullRequestMergedEvents",
  "dimensionFieldSpecs": [
    {
      "name": "title",
      "dataType": "STRING",
      "defaultNullValue": ""
    },
    {
      "name": "labels",
      "dataType": "STRING",
      "singleValueField": false,
      "defaultNullValue": ""
    },
    {
      "name": "userId",
      "dataType": "STRING",
      "defaultNullValue": ""
    },
    {
      "name": "userType",
      "dataType": "STRING",
      "defaultNullValue": ""
    },
    {
      "name": "authorAssociation",
      "dataType": "STRING",
      "defaultNullValue": ""
    },
    {
      "name": "mergedBy",
      "dataType": "STRING",
      "defaultNullValue": ""
    },
    {
      "name": "assignees",
      "dataType": "STRING",
      "singleValueField": false,
      "defaultNullValue": ""
    },
    {
      "name": "authors",
      "dataType": "STRING",
      "singleValueField": false,
      "defaultNullValue": ""
    },
    {
      "name": "committers",
      "dataType": "STRING",
      "singleValueField": false,
      "defaultNullValue": ""
    },
    {
      "name": "requestedReviewers",
      "dataType": "STRING",
      "singleValueField": false,
      "defaultNullValue": ""
    },
    {
      "name": "requestedTeams",
      "dataType": "STRING",
      "singleValueField": false,
      "defaultNullValue": ""
    },
    {
      "name": "reviewers",
      "dataType": "STRING",
      "singleValueField": false,
      "defaultNullValue": ""
    },
    {
      "name": "commenters",
      "dataType": "STRING",
      "singleValueField": false,
      "defaultNullValue": ""
    },
    {
      "name": "repo",
      "dataType": "STRING",
      "defaultNullValue": ""
    },
    {
      "name": "organization",
      "dataType": "STRING",
      "defaultNullValue": ""
    }
  ],
  "metricFieldSpecs": [
    {
      "name": "count",
      "dataType": "LONG",
      "defaultNullValue": 1
    },
    {
      "name": "numComments",
      "dataType": "LONG"
    },
    {
      "name": "numReviewComments",
      "dataType": "LONG"
    },
    {
      "name": "numCommits",
      "dataType": "LONG"
    },
    {
      "name": "numLinesAdded",
      "dataType": "LONG"
    },
    {
      "name": "numLinesDeleted",
      "dataType": "LONG"
    },
    {
      "name": "numFilesChanged",
      "dataType": "LONG"
    },
    {
      "name": "numAuthors",
      "dataType": "LONG"
    },
    {
      "name": "numCommitters",
      "dataType": "LONG"
    },
    {
      "name": "numReviewers",
      "dataType": "LONG"
    },
    {
      "name": "numCommenters",
      "dataType": "LONG"
    },
    {
      "name": "createdTimeMillis",
      "dataType": "LONG"
    },
    {
      "name": "elapsedTimeMillis",
      "dataType": "LONG"
    }
  ],
  "timeFieldSpec": {
    "incomingGranularitySpec": {
      "timeType": "MILLISECONDS",
      "timeFormat": "EPOCH",
      "dataType": "LONG",
      "name": "mergedTimeMillis"
    }
  }
}
​
Table config can be found at /examples/stream/githubevents/ in the release, and is also pasted below.
Note
If you're setting this up on a pre-configured cluster, set the properties stream.kafka.zk.broker.url and stream.kafka.broker.list correctly, depending on the configuration of your Kafka cluster.  
{
  "tableName": "pullRequestMergedEvents",
  "tableType": "REALTIME",
  "segmentsConfig": {
    "timeColumnName": "mergedTimeMillis",
    "timeType": "MILLISECONDS",
    "retentionTimeUnit": "DAYS",
    "retentionTimeValue": "60",
    "schemaName": "pullRequestMergedEvents",
    "replication": "1",
    "replicasPerPartition": "1"
  },
  "tenants": {},
  "tableIndexConfig": {
    "loadMode": "MMAP",
    "invertedIndexColumns": [
      "organization",
      "repo"
    ],
    "streamConfigs": {
      "streamType": "kafka",
      "stream.kafka.consumer.type": "simple",
      "stream.kafka.topic.name": "pullRequestMergedEvents",
      "stream.kafka.decoder.class.name": "org.apache.pinot.plugin.stream.kafka.KafkaJSONMessageDecoder",
      "stream.kafka.consumer.factory.class.name": "org.apache.pinot.plugin.stream.kafka20.KafkaConsumerFactory",
      "stream.kafka.zk.broker.url": "localhost:2191/kafka",
      "stream.kafka.broker.list": "localhost:19092",
      "realtime.segment.flush.threshold.time": "12h",
      "realtime.segment.flush.threshold.size": "100000",
      "stream.kafka.consumer.prop.auto.offset.reset": "smallest"
    }
  },
  "metadata": {
    "customConfigs": {}
  }
}
​
​
Add the table and schema using the command
$ bin/pinot-admin.sh AddTable \
  -tableConfigFile $PATH_TO_CONFIGS/examples/stream/githubEvents/pullRequestMergedEvents_realtime_table_config.json \
  -schemaFile $PATH_TO_CONFIGS/examples/stream/githubEvents/pullRequestMergedEvents_schema.json \
  -exec
Publish events
Start streaming GitHub events into the Kafka topic
Prerequisites
Generate a personal access token on GitHub.
$ bin/pinot-admin.sh StreamGitHubEvents \
  -topic pullRequestMergedEvents \
  -personalAccessToken <your_github_personal_access_token> \
  -kafkaBrokerList localhost:19092 \
  -schemaFile $PATH_TO_CONFIGS/examples/stream/githubEvents/pullRequestMergedEvents_schema.json
Short Version
For a single command to setup all the above steps
$ bin/pinot-admin.sh GitHubEventsQuickStart \
  -personalAccessToken <your_github_personal_access_token>
Kubernetes cluster
If you already have a Kubernetes cluster with Pinot and Kafka (see Running Pinot in Kubernetes), first create the topic and then setup the table and streaming using
$ cd kubernetes/helm
$ kubectl apply -f pinot-github-realtime-events.yml
Query
Head over to the Query Console to checkout the data!
Visualizing on SuperSet
You can use SuperSet to visualize this data. Some of the interesting insights we captures were
Most Active organizations during the lockdown
Repositories by number of commits in the Apache organization
To integrate with SuperSet you can check out the SuperSet Integrations page.
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Last updated 1 year ago