jNetPulse Daemon

A lightweight, Java-based Linux daemon designed for real-time network observability. It actively monitors target infrastructure via TCP socket connections, tracks network latency, and logs uptime status natively using Linux systemd.

🚀 Problem & Solution

Manual infrastructure checks are inefficient. This project automates uptime and latency monitoring by running as a continuous background process, simulating the edge-probing techniques used by enterprise observability platforms.

🛠 Tech Stack

• Language: Java 11+
• Concurrency: java.util.concurrent.ScheduledExecutorService
• Networking: TCP Sockets (java.net.Socket)
• OS / Infrastructure: Linux systemd, systemctl

⚙️ Deployment Instructions (Linux)

1. Compile the probe:

   javac NetProbe.java
   sudo mkdir -p /opt/netprobe
   sudo mv NetProbe.class /opt/netprobe/

2. Prepare the log directory:

   sudo touch /var/log/net_probe.log
   sudo chmod 666 /var/log/net_probe.log

3. Register and start the daemon:

   sudo cp netprobe.service /etc/systemd/system/
   sudo systemctl daemon-reload
   sudo systemctl enable netprobe.service
   sudo systemctl start netprobe.service

📊 Sample Output

Viewing the live telemetry via tail -f /var/log/net_probe.log:

Jun 29, 2026 4:55:00 PM NetProbe lambda$main$0
INFO: [UP] Google DNS is reachable. Latency: 12 ms
Jun 29, 2026 4:55:00 PM NetProbe lambda$main$0
INFO: [UP] GitHub Web is reachable. Latency: 45 ms
Jun 29, 2026 4:56:00 PM NetProbe lambda$main$0
SEVERE: [DOWN] Internal Server is UNREACHABLE.