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The pipeline can ingest files dropped into MinIO buckets. There are three patterns: single data file, metadata file with data file, and bulk upload.

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File Naming Convention

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Single Data File

Place a file in the MinIO raw bucket following this naming pattern: 
{pipeline}.{publishertoken}.{anything}.pipeline.{ext}
SegmentDescription
pipelineName of the registered pipeline configuration
publishertokenOptional identifier for the data publisher
anythingAny additional text (timestamp, version, etc.)
pipeline (literal)Fixed literal sentinel string
extFile extension: csv, json, xml
Example: 
stock_price.publisher-001.2026-03-15.1.pipeline.csv

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Metadata File + Data File

For more control, upload the data file first, then upload a metadata file (.metadata.json): Data file: stock_price.2026-03-15.pipeline.csv Metadata file: stock_price.2026-03-15.metadata.json 
{
  "dataFileName": "stock_price.2026-03-15.pipeline.csv",
  "pipeline": "stock_price",
  "publisherToken": "28c39a6f-de32-4625-9bee-6af9ee547798"
}
The data file must be uploaded before the metadata file.

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Bulk Upload

Upload multiple files to a directory, then trigger processing with a metadata file: 
{
  "dataFilePath": "s3://oss-raw/bulk/stock_price/batch-001/",
  "pipeline": "stock_price",
  "bulkUpload": true,
  "publisherToken": "28c39a6f-de32-4625-9bee-6af9ee547798"
}
Important: Use a unique dataFilePath directory for each bulk upload. Do not reuse directories.

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Compressed Files

Compressed archives (.zip, .gz, .tar, .jar) are automatically decompressed. The pipeline name and publisher token are parsed from the archive filename: 
stock_price.publisher-001.2026-03-15.pipeline.zip

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How It Works

  1. A file is placed in a MinIO bucket (via mc cp, API, or another system)
  2. MinIO sends an S3-compatible event notification to the ActiveMQ file-notifier queue
  3. The pipeline polls the queue on a configurable schedule (default: every 5 seconds)
  4. The pipeline parses the event, resolves the pipeline, and processes the file

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Configuration

The queue name and polling interval are configured in application.yaml: 
# Environment prefix - queue name becomes {environment}-file-notifier
environment: oss

# Polling interval in milliseconds
schedule:
  checkFileNotifierQueue: "5000"

# Days to retain processed message IDs for deduplication
ttlFileNotifierQueueMessages: "60"

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Message Deduplication

The pipeline tracks processed message IDs in MongoDB to prevent duplicate processing. Each processed message ID is stored with a TTL (default: 60 days). If the same event arrives again within the TTL window, it is acknowledged and discarded.

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MinIO Webhook Setup

Configure MinIO to send bucket notifications. The Docker setup uses the MinioWebhookController endpoint: 
# Using mc to configure notifications
mc admin config set myminio notify_webhook:pipeline \
  endpoint="http://pipeline:8080/api/v1/minio-events"

mc admin service restart myminio
mc event add myminio/oss-raw arn:minio:sqs::pipeline:webhook --event put
Alternatively, ActiveMQ-based notifications can be configured (see MinIO documentation for AMQP notification targets).