Constructor Detail

• HostChecker

  public HostChecker()

  Construct a HostChecker that uses the default naming service This works with the blockfile format (hostsdb.blockfile)

• HostChecker

  public HostChecker(NamingService namingService)

  Construct a HostChecker for given naming service

  Parameters:

  namingService - naming service to test entries from

Method Detail

• getAllCategories

  public Map<String,String> getAllCategories()

  Get all host categories

  Returns:

  the all categories

• getAllPingResults

  public Map<String,HostChecker.PingResult> getAllPingResults()

  Get all ping results

  Returns:

  map of hostname to ping result

• getCategory

  public String getCategory(String hostname)

  Get category for a hostname

  Returns:

  the category

• getCategoryDescription

  public String getCategoryDescription(String category)

  Get description for a category

  Parameters:

  category - the category name

  Returns:

  the category description, or the category itself if unknown

• getPingResult

  public HostChecker.PingResult getPingResult(String hostname)

  Get ping result for a hostname

  Parameters:

  hostname - hostname

  Returns:

  ping result, or null if no test has been performed

• getUseLeaseSetCheck

  public boolean getUseLeaseSetCheck()

  Get whether to use LeaseSet checking

  Returns:

  true if LeaseSet checking is enabled

• isRunning

  public boolean isRunning()

  Check if ping tester is running

  Returns:

  true if running

• main

  public static void main(String[] args)
                   throws Exception

  Test method

  Throws:

  Exception

• setUseLeaseSetCheck

  public void setUseLeaseSetCheck(boolean useLeaseSetCheck)

  Set whether to use LeaseSet checking

  Parameters:

  useLeaseSetCheck - true to use LeaseSet lookup first

• start

  public void start()

  Start periodic ping testing

• stop

  public void stop()

  Stop periodic ping testing

• testDestination

  public HostChecker.PingResult testDestination(String hostname)

  Test a single destination immediately If LeaseSet lookup succeeds, we don't overwrite the result with failed ping/eephead

  Parameters:

  hostname - hostname to test

  Returns:

  ping result