WakeRemote4J is a lightweight, open-source Java library designed to simplify remote machine management through Wake-on-LAN (WoL) and network diagnostic protocols. It provides developers with a clean, object-oriented API to integrate remote power-on and connectivity-checking capabilities directly into enterprise applications, automation scripts, or desktop tools. Key Features
Robust Wake-on-LAN Implementation: Construct and broadcast standard 102-byte Magic Packets over UDP to trigger power-on states in target hardware.
Subnet and Broadcast Support: Target specific remote nodes by configuring custom broadcast IP addresses and ports (typically 7 or 9).
Ping and Heartbeat Diagnostics: Built-in ICMP ping utilities to verify if a machine has successfully booted or to monitor ongoing online status.
Zero External Dependencies: A self-contained JAR file that relies exclusively on native Java networking (java.net), keeping your project’s dependency tree clean and secure. Getting Started
Integrating the library into your Java application requires minimal setup. Below is a quick-start guide demonstrating how to initialize a remote node and issue a wake command. Installation
Add the dependency to your build configuration. For Maven users:
The following snippet establishes a remote device profile using its MAC and broadcast IP addresses, sends the wake signal, and verifies connectivity.
import org.wakeremote4j.RemoteNode; import org.wakeremote4j.WakeEngine; public class Main { public static void main(String[] args) { // Target configuration String macAddress = “00:11:22:33:44:55”; String broadcastIp = “192.168.1.255”; int wolPort = 9; // Initialize the remote node RemoteNode targetNode = new RemoteNode(macAddress, broadcastIp, wolPort); // Broadcast the magic packet boolean packetSent = WakeEngine.wake(targetNode); if (packetSent) { System.out.println(“Magic packet successfully broadcasted.”); // Optional: Verify if the machine responds to a ping after 30 seconds boolean isOnline = targetNode.isReachable(30000); System.out.println(“Machine online status: ” + isOnline); } else { System.err.println(“Failed to send wake signal.”); } } } Use code with caution. Ideal Use Cases
IT Infrastructure Automation: Automate the powering up of local servers or backup machines before scheduled nightly maintenance routines.
DevOps and CI/CD Pipelines: Save cloud or infrastructure costs by waking physical on-premise build runners only when a pipeline is triggered, shutting them down when idle.
Smart Home & Lab Management: Build customized desktop or mobile control panels to wake personal workstations, NAS devices, or media servers on demand. System Prerequisites
For WakeRemote4J to successfully wake a machine, ensure the following environments are configured:
BIOS/UEFI: The target motherboard must have “Wake-on-LAN”, “Power On By PCI-E”, or a similar setting enabled.
Network Adapter: The network interface card (NIC) drivers on the target OS must be configured to allow Magic Packets to wake the system.
Network Architecture: Because WoL relies on UDP broadcasts, the managing application and the target machine should ideally reside on the same subnet. Router configurations (such as directed broadcasts) are required if waking machines across different VLANs.
To tailor this content or code specifically to your current setup, please let me know:
The exact build tool you are using (Maven, Gradle, or manual JAR inclusion)?
Whether your application needs to wake machines across different subnets or just a local network?
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