io.fabric8.utils

Class AvailablePortFinder

java.lang.Object

io.fabric8.utils.AvailablePortFinder

public final class AvailablePortFinder
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static int	MAX_PORT_NUMBER The maximum server currentMinPort number for IPv4.
static int	MIN_PORT_NUMBER The minimum server currentMinPort number for IPv4.

Method Summary

Methods

Modifier and Type	Method and Description
static boolean	available(int port) Checks to see if a specific port is available.
static int	getNextAvailable() Gets the next available port starting at the lowest number.
static int	getNextAvailable(int fromPort) Gets the next available port starting at a given from port.

Methods inherited from class java.lang.Object

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

Field Detail

MIN_PORT_NUMBER

public static final int MIN_PORT_NUMBER

The minimum server currentMinPort number for IPv4. Set at 1100 to avoid returning privileged currentMinPort numbers.

See Also:

Constant Field Values

MAX_PORT_NUMBER

public static final int MAX_PORT_NUMBER

The maximum server currentMinPort number for IPv4.

See Also:

Constant Field Values

Method Detail

getNextAvailable

public static int getNextAvailable()

Gets the next available port starting at the lowest number. This is the preferred method to use. The port return is immediately marked in use and doesn't rely on the caller actually opening the port.

Returns:

the available port

Throws:

IllegalArgumentException - is thrown if the port number is out of range

NoSuchElementException - if there are no ports available

getNextAvailable

public static int getNextAvailable(int fromPort)

Gets the next available port starting at a given from port.

Parameters:

fromPort - the from port to scan for availability

Returns:

the available port

Throws:

IllegalArgumentException - is thrown if the port number is out of range

NoSuchElementException - if there are no ports available

available

public static boolean available(int port)
                         throws IllegalArgumentException

Checks to see if a specific port is available.

Parameters:

port - the port number to check for availability

Returns:

true if the port is available, or false if not

Throws:

IllegalArgumentException - is thrown if the port number is out of range