org.apache.hadoop.contrib.failmon
Class NICParser

java.lang.Object
  org.apache.hadoop.contrib.failmon.ShellParser
      org.apache.hadoop.contrib.failmon.NICParser

All Implemented Interfaces:

Monitored

public class NICParser
extends ShellParser

Objects of this class parse the output of ifconfig to gather information about present Network Interface Cards in the system. The list of NICs to poll is specified in the configuration file.

Constructor Summary

NICParser()
Constructs a NICParser and reads the list of NICs to query

Method Summary

String	getInfo() Return a String with information about this class
EventRecord[]	monitor() Invokes query() to do the parsing and handles parsing errors for each one of the NICs specified in the configuration.
EventRecord	query(String device) Reads and parses the output of ifconfig for a specified NIC and creates an appropriate EventRecord that holds the desirable information for it.

Methods inherited from class org.apache.hadoop.contrib.failmon.ShellParser

findAll, findPattern, monitor

Methods inherited from class java.lang.Object

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

Constructor Detail

NICParser

public NICParser()

Constructs a NICParser and reads the list of NICs to query

Method Detail

query

public EventRecord query(String device)
                  throws UnknownHostException

Reads and parses the output of ifconfig for a specified NIC and creates an appropriate EventRecord that holds the desirable information for it.

Specified by:

query in class ShellParser

Parameters:

device - the NIC device name to query

Returns:

the EventRecord created

Throws:

UnknownHostException

monitor

public EventRecord[] monitor()

Invokes query() to do the parsing and handles parsing errors for each one of the NICs specified in the configuration.

Specified by:

monitor in interface Monitored

Specified by:

monitor in class ShellParser

Returns:

an array of EventRecords that holds one element that represents the current state of network interfaces.

getInfo

public String getInfo()

Return a String with information about this class

Returns:

A String describing this class