Java Globus API: Class PortRange

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org.globus.net
Class PortRange

java.lang.Object
  |
  +--org.globus.net.PortRange

public class PortRange
extends java.lang.Object

This class manages the port ranges. It keeps track of which ports are used and which ones are open.

Field Summary
`protected static byte`	`UNUSED`
`protected static byte`	`USED`

Constructor Summary
`protected`	`PortRange()`

Method Summary
`void`	`free(int portNumber)` Releases or frees the port number.
`int`	`getFreePort(int lastPortNumber)` Returns first available port.
`static PortRange`	`getInstance()` Returns the default instance of this class.
`boolean`	`isEnabled()` Checks if the port range is set.
`void`	`setUsed(int portNumber)` Sets the port number as used.

Methods inherited from class java.lang.Object

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

Field Detail

UNUSED

protected static final byte UNUSED

USED

protected static final byte USED

Constructor Detail

PortRange

protected PortRange()

Method Detail

getInstance

public static PortRange getInstance()

Returns the default instance of this class. If the tcp.port.range property is set, the class will be initialized with the specified port ranges.

Returns:: PortRange the default instace of this class.

isEnabled

public boolean isEnabled()

Checks if the port range is set.

Returns:: true if the port range is set, false otherwise.

getFreePort

public int getFreePort(int lastPortNumber)
                throws java.io.IOException

Returns first available port.

Parameters:: lastPortNumber - port number to start finding the next available port from. Set it to 0 if called initialy.
Returns:: the next available port number from the lastPortNumber.

setUsed

public void setUsed(int portNumber)

Sets the port number as used.

Parameters:: portNumber - port number

free

public void free(int portNumber)

Releases or frees the port number. (Mark it as unused)

Parameters:: portNumber - port number