OpenELIS Analyzer Bridge

Middleware that receives analyzer messages over multiple protocols/transports and forwards them to OpenELIS via HTTP.

This repository was previously named ASTM-HTTP Bridge. The internal rename to openelis-analyzer-bridge is complete across Maven, Docker, and scripts. The Docker Hub image itechuw/astm-http-bridge is still published as a legacy alias via CI.

Architecture

Analyzer(s)                                    OpenELIS
───────────                                    ────────
ASTM/TCP    ─┐
HL7/MLLP    ─┤                                        ┌─ /analyzer/astm
RS232/Serial─┼─> [OpenELIS Analyzer Bridge] ──HTTP──> ├─ /analyzer/hl7
Files (CSV) ─┤   │ Protocol Detection      │          ├─ /analyzer/csv
HTTP /input ─┘   │ Analyzer Identification  │          └─ /analyzer/raw
                  │ Message Normalization    │
                  │ Metrics + Health Checks  │
                  └─────────────────────────┘
                     │
                     ├─ /actuator/health      (per-transport status)
                     ├─ /actuator/prometheus   (Prometheus metrics)
                     └─ /actuator/metrics      (Micrometer metrics)

OpenELIS ──HTTP POST──> [Bridge] ──TCP──> Analyzer (ASTM host query / outbound)

Protocol vs Transport

Concept	Options	Description
Protocol	ASTM, HL7, CSV	Message format/syntax
Transport	TCP, MLLP, Serial, File, HTTP	How the message arrives

Quick Start

Using Docker (Recommended)

git clone https://github.com/DIGI-UW/openelis-analyzer-bridge.git
cd openelis-analyzer-bridge

docker compose up -d --build
docker logs --follow openelis-analyzer-bridge

Building from Source

cd astm-http-lib
mvn clean install

cd ..
mvn clean package

java -jar target/openelis-analyzer-bridge-*.jar --spring.config.location=configuration.yml

Docker Deployment

Port Mapping

External	Internal	Service
8442	8443	HTTPS API endpoint
12000	12001	ASTM LIS1-A listener
12010	12011	ASTM E1381-95 listener
2575	2575	MLLP HL7 listener

Volume Mounts

Host Path	Container Path	Purpose
`./configuration.yml`	`/app/configuration.yml`	Runtime configuration
`/path/to/import`	`/mnt/analyzer-import`	File watcher input (optional)
`/path/to/archive`	`/mnt/analyzer-archive`	Processed files (optional)

Serial Devices

Uncomment in docker-compose.yml if using serial transport:

devices:
  - /dev/ttyUSB0:/dev/ttyUSB0

Configuration

Runtime configuration is read from configuration.yml (mounted into container at /app/configuration.yml).

Configuration Properties Reference

Property	Description	Default
OpenELIS Target
`org.itech.ahb.forward-http-server.uri`	OpenELIS endpoint URI	Required
`org.itech.ahb.forward-http-server.username`	Basic auth username	Optional
`org.itech.ahb.forward-http-server.password`	Basic auth password	Optional
ASTM TCP
`org.itech.ahb.listen-astm-server.port`	ASTM LIS1-A listen port	12001
`org.itech.ahb.listen-astm-e1381-95-server.port`	E1381-95 listen port	12011
MLLP (HL7)
`org.itech.ahb.mllp.enabled`	Enable MLLP listener	false
`org.itech.ahb.mllp.port`	MLLP listen port	2575
Serial
`org.itech.ahb.serial.enabled`	Enable serial listener	false
File Watcher
`bridge.file.enabled`	Enable file watcher	false
`bridge.file.watchDirectories`	Directories to watch	[]
`bridge.file.archiveDirectory`	Processed files archive	Required if enabled
`bridge.file.pollIntervalMs`	Poll interval	5000
Security (M7.1)
`bridge.security.enabled`	Enable HTTP Basic auth on /input	true
`bridge.security.username`	HTTP Basic username	bridge
`bridge.security.password`	HTTP Basic password (use env var)	changeme
Server
`server.port`	HTTP server port	8443

Analyzer Identification

Configure analyzer mappings in bridge.analyzers:

bridge:
  analyzers:
    "192.168.1.10":
      id: MINDRAY-BC5380-001
      name: "Mindray BC-5380"
      expectedProtocol: ASTM
    "/dev/ttyUSB0":
      id: HORIBA-PENTRA60-001
      name: "Horiba Pentra 60"
      expectedProtocol: ASTM
    "quantstudio-*":
      id: QUANTSTUDIO-001
      name: "QuantStudio 7 Flex"
      expectedProtocol: CSV

Monitoring & Observability

Health Checks

# Overall health
curl http://localhost:8442/actuator/health

# Individual transport health
curl http://localhost:8442/actuator/health/httpforward   # OpenELIS connectivity
curl http://localhost:8442/actuator/health/mllp          # MLLP listener status
curl http://localhost:8442/actuator/health/serial         # Serial port status
curl http://localhost:8442/actuator/health/filewatcher    # File watcher status

Health indicators are individually enabled/disabled via configuration:

management:
  health:
    mllp:
      enabled: true
    serial:
      enabled: true
    filewatcher:
      enabled: true
    httpforward:
      enabled: true

Prometheus Metrics

Prometheus-format metrics are exposed at /actuator/prometheus.

Metric	Type	Tags	Description
`bridge_messages_received_total`	Counter	protocol, transport	Messages received from analyzers
`bridge_messages_routed_total`	Counter	protocol, transport, result	Messages forwarded to OpenELIS
`bridge_messages_routing_duration_seconds`	Timer	protocol, transport	End-to-end routing latency

Example PromQL queries:

# Message throughput per minute
rate(bridge_messages_received_total[1m])

# Routing success rate
rate(bridge_messages_routed_total{result="success"}[5m])
  / rate(bridge_messages_routed_total[5m])

# P95 latency by protocol
histogram_quantile(0.95, rate(bridge_messages_routing_duration_seconds_bucket[5m]))

Kubernetes Probes

livenessProbe:
  httpGet:
    path: /actuator/health
    port: 8443
  initialDelaySeconds: 120
  periodSeconds: 30

readinessProbe:
  httpGet:
    path: /actuator/health
    port: 8443
  initialDelaySeconds: 30
  periodSeconds: 10

Security

The /input HTTP endpoint is protected with HTTP Basic authentication (M7.1). Non-HTTP transports (ASTM/TCP, MLLP, Serial, File) are unaffected.

Configuration

bridge:
  security:
    enabled: true                               # false to disable (not recommended)
    username: bridge
    password: ${BRIDGE_AUTH_PASSWORD:changeme}   # Set via environment variable

Usage

# Authenticated request to /input
curl -u bridge:changeme -X POST http://localhost:8442/input \
  -H "Content-Type: application/hl7-v2" \
  -d "MSH|^~\&|ANALYZER|LAB|..."

# Unauthenticated returns 401
curl -X POST http://localhost:8442/input -d "test"
# → 401 Unauthorized

Production Setup

Set the password via environment variable:

export BRIDGE_AUTH_PASSWORD=your-secure-password
docker compose up -d

Or in Docker Compose:

environment:
  BRIDGE_AUTH_PASSWORD: your-secure-password

Disabling Security

For development only:

bridge:
  security:
    enabled: false

HTTP Behavior (ASTM Stable Path)

Analyzer -> OpenELIS (results submission)

Bridge receives ASTM over TCP.
Bridge forwards the raw message to the configured OpenELIS endpoint as text/plain.
Bridge adds X-Source-Analyzer-IP when source IP can be extracted from the TCP socket.

OpenELIS -> Analyzer (query/config)

curl -X POST "http://bridge:8443/?forwardAddress=192.168.1.10&forwardPort=5000" \
  -H "Content-Type: text/plain" \
  -d "H|\^&|||"

Testing

Unit Tests

mvn test

Integration Tests

mvn verify

Docker E2E Tests

# Run full E2E suite (ASTM TCP, MLLP, File, HTTP)
./scripts/e2e-tests/run-all.sh

# Or start manually:
docker compose -f docker-compose.test.yml up -d --build
./scripts/e2e-tests/test-astm-tcp.sh
./scripts/e2e-tests/test-mllp.sh
./scripts/e2e-tests/test-file-csv.sh
./scripts/e2e-tests/test-http-input.sh
docker compose -f docker-compose.test.yml down

Project Structure

openelis-analyzer-bridge/
├── src/main/java/org/itech/ahb/
│   ├── controller/          # HTTP endpoints (/input, query forwarding)
│   ├── config/              # Configuration classes
│   ├── file/                # File watcher transport
│   ├── health/              # Health indicators (HTTP, MLLP, Serial, File)
│   ├── metrics/             # Prometheus metrics service
│   ├── mllp/                # MLLP transport (HL7 v2.x)
│   ├── model/               # Protocol/Transport enums
│   ├── normalizer/          # Message normalization + routing
│   ├── routing/             # HTTP forwarding router
│   ├── serial/              # Serial port transport
│   └── util/                # Utilities
├── astm-http-lib/           # ASTM protocol library
├── configuration.yml        # Runtime configuration
├── docker-compose.yml       # Production deployment
├── docker-compose.test.yml  # E2E test environment
└── scripts/e2e-tests/       # E2E test scripts

Docs

docs/SCOPE_AND_NAMING.md: canonical naming + compatibility policy
docs/ASTM_MESSAGE_PROCESSING_FLOW.md: ASTM flow details (OpenELIS-side processing)

License / Contributing

TBD (add project license and contribution guidelines).

Name		Name	Last commit message	Last commit date
Latest commit History 74 Commits
.cursor		.cursor
.github/workflows		.github/workflows
.specify		.specify
astm-http-lib		astm-http-lib
docs		docs
scripts		scripts
specs/001-bi-directional-astm		specs/001-bi-directional-astm
src		src
.gitignore		.gitignore
.prettierrc.yml		.prettierrc.yml
.sdkmanrc		.sdkmanrc
Dockerfile		Dockerfile
Dockerfile.dev		Dockerfile.dev
Dockerfile.test		Dockerfile.test
M7-IMPLEMENTATION-PROMPT.md		M7-IMPLEMENTATION-PROMPT.md
README		README
README.md		README.md
configuration.test.yml		configuration.test.yml
configuration.yml		configuration.yml
docker-compose-dev.yml		docker-compose-dev.yml
docker-compose-devhub.yml		docker-compose-devhub.yml
docker-compose-serial-test.yml		docker-compose-serial-test.yml
docker-compose.test.yml		docker-compose.test.yml
docker-compose.yml		docker-compose.yml
docker-entrypoint.sh		docker-entrypoint.sh
eslint.config.mjs		eslint.config.mjs
healthcheck.sh		healthcheck.sh
package-lock.json		package-lock.json
package.json		package.json
pom.xml		pom.xml

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OpenELIS Analyzer Bridge

Architecture

Protocol vs Transport

Quick Start

Using Docker (Recommended)

Building from Source

Docker Deployment

Port Mapping

Volume Mounts

Serial Devices

Configuration

Configuration Properties Reference

Analyzer Identification

Monitoring & Observability

Health Checks

Prometheus Metrics

Kubernetes Probes

Security

Configuration

Usage

Production Setup

Disabling Security

HTTP Behavior (ASTM Stable Path)

Analyzer -> OpenELIS (results submission)

OpenELIS -> Analyzer (query/config)

Testing

Unit Tests

Integration Tests

Docker E2E Tests

Project Structure

Docs

License / Contributing

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