gateway-batch-sender

This service will...

Read batches from NATS Jetstream Server Consumer "ENCRYPTED_BATCHES and send the appropriate ACK to the Jetstream Server
Send HL7 batches to the HL7 Batch Receiver in the Cloud via Rest API call including tenantId and timezone of where the gateway is deployed (in configuration) in the header.

Development

Setup

gradle tasks # will list all the available tasks
gradle build # will setup virtualenv, run all tests, and create reports and distribution

Update gradle.properties as needed.

Install NATS Jetstream server and NATS CLI

You can find the instructions for the NATS Jetstream server (via docker) here: https://hub.docker.com/_/nats/

You can find the instructions for the NATS Cli here: https://github.com/nats-io/natscli

Create the HL7 stream and ENCRYPTED_BATCHES consumer

Create the HL7 stream:

nats str add HL7 --subjects "HL7.*" --ack --max-msgs=-1 --max-bytes=-1 --max-age=1y --storage file --retention limits --max-msg-size=-1 --discard=old --dupe-window=2m --replicas=1

Create the ENCRYPTED_BATCHES consumer for the HL7 stream:

nats con add HL7 ENCRYPTED_BATCHES --filter HL7.ENCRYPTED_BATCHES --ack explicit --pull --deliver all --max-deliver=-1 --sample 100  --replay=instant --wait=1s

Building

Use gradle to do a clean build.

nats con add HL7 ENCRYPTED_BATCHES --filter HL7.ENCRYPTED_BATCHES --ack explicit --pull --deliver all --max-deliver=-1 --sample 100 --replay=instant --max-pending=1

Testing

To run unittest, execute:

gradle clean test -b local.build.gradle

Running by command line

To run the program, execute:

python3 -m batch_sender.main

To send a message:

nats req HL7.ENCRYPTED_BATCHES <subject> [<body>]

To send a message from a file:

echo <filename> | nats req HL7.ENCRYPTED_BATCHES <subject>

Environment variables

You will need to override these if you are not running locally.

NATS_INCOMING_SUBJECT = NATS subject to use

NATS_SERVER_URL = NATS Jetstream connection info

BATCH_RECEIVER_URL = Batch receiver cloud URL

GATEWAY_TIMEZONE = Timezone

GATEWAY_TENANT = Tenant

Creating the docker image

Create the container using the docker build command below. Add your artifactory id (this is likely your w3 email) and key where specified.

docker build -t gateway-batch-sender:1.0.0 .

If the steps completed successfully, the image specified by the -t option should now exist.

Running the docker image

Note that the versions may need updated in the examples below.

docker run --name gateway-batch-sender -p 5000:5000 gateway-batch-sender:1.0.0

LinuxForHealth / gateway-batch-sender