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## org.apache.hadoop.contrib.failmon
Class HadoopLogParser

    java.lang.Object
      org.apache.hadoop.contrib.failmon.LogParser
          org.apache.hadoop.contrib.failmon.HadoopLogParser

All Implemented Interfaces:
  Monitored

    public class HadoopLogParser

extends LogParser

An object of this class parses a Hadoop log file to create appropriate EventRecords. The log file can either be the log of a NameNode or JobTracker or DataNode or TaskTracker.

Constructor Summary
`HadoopLogParser(String fname)` Create a new parser object and try to find the hostname of the node that generated the log

Method Summary
`String` | `getInfo()` Return a String with information about this class
`protected Calendar` | `parseDate(String strDate, String strTime)` Parse a date found in the Hadoop log.
`EventRecord` | `parseLine(String line)` Parses one line of the log.

Methods inherited from class org.apache.hadoop.contrib.failmon.LogParser
`checkForRotation, getNext, getReader, monitor, monitor, setNetworkProperties`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### HadoopLogParser

    public HadoopLogParser(String fname)

  Create a new parser object and try to find the hostname of the node that generated the log

Method Detail

### parseLine

    public EventRecord parseLine(String line)
                          throws IOException

  Parses one line of the log. If the line contains a valid log entry, then an appropriate EventRecord is returned, after all relevant fields have been parsed.

  Specified by:
    `parseLine` in class `LogParser`
  Parameters:
    `line` - the log line to be parsed
  Returns:
    the EventRecord representing the log entry of the line. If the line does not contain a valid log entry, then the EventRecord returned has isValid() = false. When the end-of-file has been reached, null is returned to the caller.
  Throws:
    `IOException`

### parseDate

    protected Calendar parseDate(String strDate,
                                 String strTime)

  Parse a date found in the Hadoop log.

  Specified by:
    `parseDate` in class `LogParser`
  Returns:
    a Calendar representing the date

### getInfo

    public String getInfo()

  Return a String with information about this class

  Returns:
    A String describing this class

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Copyright © 2009 The Apache Software Foundation