uk.co.westhawk.snmp.beans
Class SNMPBean

java.lang.Object
  |
  +--uk.co.westhawk.snmp.beans.SNMPBean

Direct Known Subclasses:

IsHostReachableBean, NcdPerfDataBean, SNMPRunBean

public abstract class SNMPBean

extends java.lang.Object

This bean forms the base of the SNMP beans.

It provides the setting of the properties that are always needed when sending a SNMP request:
• host, default is localhost
• port, default is 161
• community name, default is public

The bean will only come into action when the method action() is called. This should be done after the properties have been set.

This bean also provide the methods for adding and removing property change listeners and firing property change events.

Note: This bean will create a socket. This might result in a SecurityException because of the Java security policy.
• If you are an applet: you're only connect back to its source web server
• If you are an application or servlet: java allows you to send it. The host might refuse your connection.

The SNMP request will only succeed if:
• java security policy allows the opening of the socket
• the host/port combination is reachable from your location (you can check that with the ping (command line) command.
• the combination of OID and community name is correct

Version:

$Revision: 1.8 $ $Date: 2002/11/04 17:56:21 $

Author:

Birgit Arkesteijn

See Also:

SNMPRunBean, IsHostReachableBean, OneInterfaceBean, InterfaceIndexesBean

Field Summary

protected java.lang.String	community
protected SnmpContext	context
protected java.lang.String	host
protected java.lang.String	message
protected int	port
protected java.util.Vector	propertyChangeListener

Constructor Summary

SNMPBean()
The default constructor.

SNMPBean(java.lang.String h, int p)
The constructor that will set the host and the port no.

Method Summary

abstract void	action() This method should send the SNMP request.
void	addPropertyChangeListener(java.beans.PropertyChangeListener l) Add a property change listener.
protected void	firePropertyChange(java.lang.String property, java.lang.Object old_v, java.lang.Object new_v) Fire the property event.
java.lang.String	getCommunityName() Returns the community name that is used to send the SNMP request.
java.lang.String	getHost() Returns the host (name or ipadress) which is addressed.
java.lang.String	getMessage() Returns the message (if any).
int	getPort() Returns the port no which is used.
protected boolean	isHostPortReachable() Indicates whether the host is reachable.
void	removePropertyChangeListener(java.beans.PropertyChangeListener l) Remove a property change listener.
void	setCommunityName(java.lang.String c) Sets the community name that is used to send the SNMP request.
void	setHost(java.lang.String h) Sets the host (name or ipadress) which will be asked for the SNMP request.
protected void	setMessage(java.lang.String st) Returns the message (if any).
void	setPort(int p) Sets the port no which is used.
void	setPort(java.lang.String p) Sets the port no which is used as a String.

Methods inherited from class java.lang.Object

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

Field Detail

context

protected SnmpContext context

host

protected java.lang.String host

port

protected int port

community

protected java.lang.String community

message

protected java.lang.String message

propertyChangeListener

protected java.util.Vector propertyChangeListener

Constructor Detail

SNMPBean

public SNMPBean()

The default constructor.

SNMPBean

public SNMPBean(java.lang.String h,
                int p)

The constructor that will set the host and the port no.

Parameters:

h - the hostname

p - the port no

See Also:

setHost(java.lang.String), setPort(int)

Method Detail

action

public abstract void action()
                     throws PduException,
                            java.io.IOException

This method should send the SNMP request. All properties should be set before this method is called.

getHost

public java.lang.String getHost()

Returns the host (name or ipadress) which is addressed. This is the host where the SNMP server is running.

Returns:

the name of the host

See Also:

setHost(java.lang.String)

setHost

public void setHost(java.lang.String h)

Sets the host (name or ipadress) which will be asked for the SNMP request. This is the host where the SNMP server is running. The default is localhost. This bean will only start the request when action is called.

See Also:

getHost()

getPort

public int getPort()

Returns the port no which is used. That is the no of the port on the host where the SNMP server is running.

See Also:

setPort(int), setPort(String)

setPort

public void setPort(int p)

Sets the port no which is used. That should be the no of the port on the host where the SNMP server is running. The default is 161. This bean will only start the request when action is called.

Parameters:

p - The number of the port

See Also:

getPort(), setPort(String)

setPort

public void setPort(java.lang.String p)

Sets the port no which is used as a String.

Parameters:

p - The number of the port as a String

See Also:

getPort(), setPort(int)

getCommunityName

public java.lang.String getCommunityName()

Returns the community name that is used to send the SNMP request.

See Also:

setCommunityName(java.lang.String)

setCommunityName

public void setCommunityName(java.lang.String c)

Sets the community name that is used to send the SNMP request. The default is public.

See Also:

getCommunityName()

isHostPortReachable

protected boolean isHostPortReachable()

Indicates whether the host is reachable. This method will try to make a new SnmpContext, if this works, it is reachable. If it does not work, the message will be set.

See Also:

SnmpContext

getMessage

public java.lang.String getMessage()

Returns the message (if any). The message is used to give the user feedback if anything is happened with the request or the connection.

Returns:

the message

setMessage

protected void setMessage(java.lang.String st)

Returns the message (if any). The message is used to give the user feedback if anything is happened (usualy when something went wrong) with the connection.

Parameters:

st - the message string

See Also:

getMessage()

addPropertyChangeListener

public void addPropertyChangeListener(java.beans.PropertyChangeListener l)

Add a property change listener.

See Also:

removePropertyChangeListener(java.beans.PropertyChangeListener)

removePropertyChangeListener

public void removePropertyChangeListener(java.beans.PropertyChangeListener l)

Remove a property change listener.

See Also:

addPropertyChangeListener(java.beans.PropertyChangeListener)

firePropertyChange

protected void firePropertyChange(java.lang.String property,
                                  java.lang.Object old_v,
                                  java.lang.Object new_v)

Fire the property event.

See Also:

removePropertyChangeListener(java.beans.PropertyChangeListener), addPropertyChangeListener(java.beans.PropertyChangeListener), PropertyChangeEvent, PropertyChangeListener