Field Detail

• NANOS_PER_SECOND

  public static final long NANOS_PER_SECOND

  See Also:

  Constant Field Values

• METRICS

  private static final com.yammer.metrics.core.MetricsRegistry METRICS

  Needed making histograms.

• MAPPER

  private static final org.codehaus.jackson.map.ObjectMapper MAPPER

  Needed generating JSON.

Constructor Detail

• BlockCacheUtil

  public BlockCacheUtil()

Method Detail

• toString

  public static String toString(CachedBlock cb,
                long now)

  Parameters:

  cb -

  Returns:

  The block content as String.

• toJSON

  public static String toJSON(String filename,
              NavigableSet<CachedBlock> blocks)
                       throws org.codehaus.jackson.JsonGenerationException,
                              org.codehaus.jackson.map.JsonMappingException,
                              IOException

  Parameters:

  filename -

  blocks -

  Returns:

  A JSON String of filename and counts of blocks

  Throws:

  org.codehaus.jackson.JsonGenerationException

  org.codehaus.jackson.map.JsonMappingException

  IOException

• toJSON

  public static String toJSON(BlockCacheUtil.CachedBlocksByFile cbsbf)
                       throws org.codehaus.jackson.JsonGenerationException,
                              org.codehaus.jackson.map.JsonMappingException,
                              IOException

  Parameters:

  cbsbf -

  Returns:

  JSON string of cbsf aggregated

  Throws:

  org.codehaus.jackson.JsonGenerationException

  org.codehaus.jackson.map.JsonMappingException

  IOException

• toJSON

  public static String toJSON(BlockCache bc)
                       throws org.codehaus.jackson.JsonGenerationException,
                              org.codehaus.jackson.map.JsonMappingException,
                              IOException

  Parameters:

  bc -

  Returns:

  JSON string of bc content.

  Throws:

  org.codehaus.jackson.JsonGenerationException

  org.codehaus.jackson.map.JsonMappingException

  IOException

• toStringMinusFileName

  public static String toStringMinusFileName(CachedBlock cb,
                             long now)

  Parameters:

  cb -

  Returns:

  The block content of bc as a String minus the filename.

• getLoadedCachedBlocksByFile

  public static BlockCacheUtil.CachedBlocksByFile getLoadedCachedBlocksByFile(org.apache.hadoop.conf.Configuration conf,
                                                              BlockCache bc)

  Get a BlockCacheUtil.CachedBlocksByFile instance and load it up by iterating content in BlockCache.

  Parameters:

  conf - Used to read configurations

  bc - Block Cache to iterate.

  Returns:

  Laoded up instance of CachedBlocksByFile