Package org.globus.net
Class PortRange
java.lang.Object
org.globus.net.PortRange
This class manages the port ranges. It keeps track of which
ports are used and which ones are open.
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Field Summary
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
free
(int portNumber) Releases or frees the port number.int
getFreePort
(int lastPortNumber) Returns first available port.static PortRange
Returns PortRange instance for TCP listening sockets.static PortRange
Returns PortRange instance for TCP listening sockets.static PortRange
Returns PortRange instance for TCP source sockets.static PortRange
Returns PortRange instance for UDP source sockets.private void
boolean
Checks if the port range is set.boolean
isInRange
(int portNumber) Checks if the port number if within port range.private void
setPort
(int portNumber, byte type) void
setUsed
(int portNumber) Sets the port number as used.
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Field Details
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UNUSED
protected static final byte UNUSED- See Also:
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USED
protected static final byte USED- See Also:
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portRange
private boolean portRange -
minPort
private int minPort -
maxPort
private int maxPort -
ports
private byte[] ports -
tcpPortRange
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tcpSourcePortRange
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udpSourcePortRange
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Constructor Details
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PortRange
protected PortRange()
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Method Details
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getInstance
Returns PortRange instance for TCP listening sockets.- See Also:
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getTcpInstance
Returns PortRange instance for TCP listening sockets. 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.
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getTcpSourceInstance
Returns PortRange instance for TCP source sockets. If the tcp.source.port.range property is set, the class will be initialized with the specified port ranges.- Returns:
- PortRange the default instace of this class.
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getUdpSourceInstance
Returns PortRange instance for UDP source sockets. If the udp.source.port.range property is set, the class will be initialized with the specified port ranges.- Returns:
- PortRange the default instace of this class.
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isEnabled
public boolean isEnabled()Checks if the port range is set.- Returns:
- true if the port range is set, false otherwise.
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getFreePort
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.
- Throws:
IOException
- if there is no more free ports available or if the lastPortNumber is incorrect.
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setUsed
public void setUsed(int portNumber) Sets the port number as used.- Parameters:
portNumber
- port number
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free
public void free(int portNumber) Releases or frees the port number. (Mark it as unused)- Parameters:
portNumber
- port number
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isInRange
public boolean isInRange(int portNumber) Checks if the port number if within port range. Does not check if it is a free, but only checks if it is within said range. -
setPort
private void setPort(int portNumber, byte type) -
init
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