Version: 3.0.2

LINE is an open source package for Java, Matlab and Python to analyze queueing models via analytical methods and simulation. The tool features algorithms for the solution of open queueing systems (e.g., M/M/1, M/M/k, M/G/1, ...), open and closed queueing networks, and layered queueing networks.

LINE is developed by the QORE lab at Imperial College London and distributed under the BSD-3 license.

Note: This is a lightweight CLI-only distribution. For full source code with MATLAB, Python, and Java/Kotlin implementations, click the Download Now button above.

# Solve a queueing model
python line.py solve examples/jsimg/closed_1class_2stat.jsimg

# Solve with specific solver and JSON output
python line.py solve model.jsimg -s fluid -o json

# List available solvers
python line.py list solvers

# Show system info
python line.py info

# Start WebSocket server mode
python line.py server -p 8080

• Python 3.8+ (standard library only, no pip packages needed)
• Java Runtime Environment (JRE) 8+

1. Download or clone this distribution:

   git clone --single-branch https://github.com/imperial-qore/line-solver.git line-cli
   cd line-cli

2. Verify setup:

   python line.py info

Alternatively, set the LINE_JAR_PATH environment variable to point to jline.jar if placed elsewhere.

• table (default) - Human-readable formatted tables
• json - JSON format for programmatic use
• csv - Comma-separated values
• raw - Raw JAR output

The examples/ directory contains sample models:

• examples/jsimg/closed_1class_2stat.jsimg - Closed queueing network
• examples/jsimg/open_1class_1stat_mg1fcfs.jsimg - M/G/1 FCFS queue
• examples/jsimg/open_1class_1stat_mm1k.jsimg - M/M/1/K finite capacity queue
• examples/lqn/simple-forwarding.lqnx - Layered queueing network

• doc/line-cli-quickstart.md - CLI quick start guide
• doc/LINE-java.pdf - Full Java/Kotlin API documentation
• doc/LINE-python.pdf - Python wrapper documentation
• doc/LINE-cheatsheet.pdf - Quick reference card

For the complete LINE solver with MATLAB, Python, and Java/Kotlin implementations:

• SourceForge: https://sourceforge.net/projects/line-solver/
• PyPI: pip install line-solver
• Documentation: https://line-solver.sourceforge.net/

BSD-3-Clause License. See LICENSE file.