Package com.github.f4b6a3.uuid.util

Class Fingerprint

java.lang.Object

com.github.f4b6a3.uuid.util.Fingerprint

public final class Fingerprint
extends Object

Utility class to generate host fingerprint.

Method Summary

Modifier and Type	Method	Description
static long	getFingerprint()	Returns long value representing a host fingerprint.
protected static String	getJavaVirtualMachine()	Returns a string of the JVM details.
protected static String	getLocalization()	Return a string with locale, charset, encoding and timezone.
protected static String	getNetwork()	Returns a string of the network details.
protected static String	getOperatingSystem()	Returns a string of the OS details.
protected static String	getResources()	Returns a string of CPU cores and maximum memory available.
static String	getSystemDataHash()	Returns a SHA-256 hash string generated from all the system data: OS + JVM + network details + system resources + locale + timezone.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getFingerprint

public static long getFingerprint()

Returns long value representing a host fingerprint. The fingerprint is calculated from a list of system properties: OS + JVM + network details + system resources + locale + timezone. It uses these information to generate the fingerprint: operating system (name, version, arch), java virtual machine (vendor, version, runtime, VM), network settings (IP, MAC, host name, domain name), system resources (CPU cores, memory), locale (language, charset) and timezone. These information are concatenated and passed to a SHA-256 message digest. It returns the last 8 bytes of the resulting hash as long value. Read: https://en.wikipedia.org/wiki/Device_fingerprint

Returns:

a fingerprint as long value

getSystemDataHash

public static String getSystemDataHash()

Returns a SHA-256 hash string generated from all the system data: OS + JVM + network details + system resources + locale + timezone.

Returns:

a string

getOperatingSystem

protected static String getOperatingSystem()

Returns a string of the OS details.

Returns:

a string

getJavaVirtualMachine

protected static String getJavaVirtualMachine()

Returns a string of the JVM details.

Returns:

a string

getLocalization

protected static String getLocalization()

Return a string with locale, charset, encoding and timezone.

Returns:

a string

getResources

protected static String getResources()

Returns a string of CPU cores and maximum memory available.

Returns:

a string

getNetwork

protected static String getNetwork()

Returns a string of the network details. It's done in three two steps: 1. it tries to find the network data associated with the host name; 2. otherwise, it iterates through all interfaces to return the first one that is up and running.

Returns:

a string