程序包org.apache.hadoop.mapreduce的分层结构

程序包分层结构:

• 所有程序包

类分层结构

• java.lang.Object
  • org.apache.hadoop.mapreduce.ClusterMetrics (implements org.apache.hadoop.io.Writable)
  • org.apache.hadoop.mapreduce.Counter (implements org.apache.hadoop.io.Writable)
  • org.apache.hadoop.mapreduce.CounterGroup (implements java.lang.Iterable<T>, org.apache.hadoop.io.Writable)
  • org.apache.hadoop.mapreduce.Counters (implements java.lang.Iterable<T>, org.apache.hadoop.io.Writable)
  • org.apache.hadoop.mapreduce.ID (implements org.apache.hadoop.io.WritableComparable<T>)
    • org.apache.hadoop.mapred.ID
      • org.apache.hadoop.mapreduce.JobID (implements java.lang.Comparable<T>)
      • org.apache.hadoop.mapreduce.TaskAttemptID
      • org.apache.hadoop.mapreduce.TaskID
  • org.apache.hadoop.mapreduce.InputFormat<K,V>
  • org.apache.hadoop.mapreduce.InputSplit
  • org.apache.hadoop.mapreduce.JobContext
    • org.apache.hadoop.mapreduce.Job
    • org.apache.hadoop.mapreduce.TaskAttemptContext (implements org.apache.hadoop.util.Progressable)
      • org.apache.hadoop.mapreduce.TaskInputOutputContext<KEYIN,VALUEIN,KEYOUT,VALUEOUT> (implements org.apache.hadoop.util.Progressable)
        • org.apache.hadoop.mapreduce.MapContext<KEYIN,VALUEIN,KEYOUT,VALUEOUT>
          • org.apache.hadoop.mapreduce.Mapper.Context
        • org.apache.hadoop.mapreduce.ReduceContext<KEYIN,VALUEIN,KEYOUT,VALUEOUT>
          • org.apache.hadoop.mapreduce.Reducer.Context
  • org.apache.hadoop.mapreduce.JobStatus
  • org.apache.hadoop.mapreduce.JobSubmissionFiles
  • org.apache.hadoop.mapreduce.Mapper<KEYIN,VALUEIN,KEYOUT,VALUEOUT>
  • org.apache.hadoop.mapreduce.OutputCommitter
  • org.apache.hadoop.mapreduce.OutputFormat<K,V>
  • org.apache.hadoop.mapreduce.Partitioner<KEY,VALUE>
  • org.apache.hadoop.mapreduce.RecordReader<KEYIN,VALUEIN> (implements java.io.Closeable)
  • org.apache.hadoop.mapreduce.RecordWriter<K,V>
  • org.apache.hadoop.mapreduce.ReduceContext.ValueIterable (implements java.lang.Iterable<T>)
  • org.apache.hadoop.mapreduce.ReduceContext.ValueIterator (implements java.util.Iterator<E>)
  • org.apache.hadoop.mapreduce.Reducer<KEYIN,VALUEIN,KEYOUT,VALUEOUT>
  • org.apache.hadoop.mapreduce.StatusReporter

枚举分层结构

• java.lang.Object
  • java.lang.Enum<E> (implements java.lang.Comparable<T>, java.io.Serializable)
    • org.apache.hadoop.mapreduce.TaskType
    • org.apache.hadoop.mapreduce.JobStatus.State
    • org.apache.hadoop.mapreduce.JobACL
    • org.apache.hadoop.mapreduce.Job.JobState