org.opennms.netmgt.poller

Interface NetworkInterface<T>

All Known Subinterfaces:

CollectionAgent, SnmpCollectionAgent

All Known Implementing Classes:

DefaultCollectionAgent, InetNetworkInterface

public interface NetworkInterface<T>

The NetworkInterface class is designed to be a well defined front for passing interfaces to a service monitor. There are many different types of network in use today including IPv4, IPv6, IPX, and others. To accommodate the possible differences this class provides the basic information that a monitor can use to determine the type of interface and its expected address type.

In addition to providing typing and address information, the interface allows for the monitor to associate key-value pairs with an interface. This can be used to save state information between the various invocations if necessary. The attributes may be shared with other monitors concurrently, so a monitor must be careful to choose unique keys to prevent namespace collisions.

Author:

Weave , OpenNMS

Field Summary

Fields

Modifier and Type	Field and Description
static int	TYPE_INET Defines a standard IPv4 or IPv6 address.
static int	TYPE_UNKNOWN Defines an unknown interface that has no associated address information.

Method Summary

Modifier and Type	Method and Description
T	getAddress() Returns the address information for the interface.
<V> V	getAttribute(String property) This method is used to return the object that is associated with the property name.
int	getType() Returns the interface type for the network interface.
Object	setAttribute(String property, Object value) This method is used to associate an object value with a textual key.

Field Detail

TYPE_UNKNOWN

static final int TYPE_UNKNOWN

Defines an unknown interface that has no associated address information.

See Also:

Constant Field Values

TYPE_INET

static final int TYPE_INET

Defines a standard IPv4 or IPv6 address. This is usually modeled by an InetAddress object.

See Also:

Constant Field Values

Method Detail

getType

int getType()

Returns the interface type for the network interface.

Returns:

a int.

getAddress

T getAddress()

Returns the address information for the interface. If the interface then this should be either an InetAddress or an object for specialized address types.

Returns:

a Object object.

getAttribute

<V> V getAttribute(String property)

This method is used to return the object that is associated with the property name. This is very similar to the java.util.Map get() method, but requires that the lookup be performed using a String name. The object may be of any instance that the monitor previous stored.

If there is no matching object for the property key, then a null pointer is returned to the application.

Parameters:

property - The key for the lookup.

Returns:

The resulting value for the key, null if no value exist.

Throws:

IllegalArgumentException - Thrown if the passed key is empty or null.

See Also:

Map.get(java.lang.Object)

setAttribute

Object setAttribute(String property,
                    Object value)

This method is used to associate an object value with a textual key. If a previous value was associated with the key then the old value is returned to the caller. This is identical to the behavior defined by the java.util.Map put() method. The only restriction is that the key must be a java string instance.

Parameters:

property - The key

value - The value to associate with the key

Returns:

The object that was previously associated with the key. Null is returned if there was no previous value associated.

Throws:

IllegalArgumentException - Thrown if the property name is empty or null.

See Also:

Map.put(java.lang.Object, java.lang.Object)