Packages

c

org.apache.spark.io

ReadAheadInputStream

class ReadAheadInputStream extends InputStream

InputStream implementation which asynchronously reads ahead from the underlying input stream when specified amount of data has been read from the current buffer. It does it by maintaining two buffers - active buffer and read ahead buffer. Active buffer contains data which should be returned when a read() call is issued. The read ahead buffer is used to asynchronously read from the underlying input stream and once the current active buffer is exhausted, we flip the two buffers so that we can start reading from the read ahead buffer without being blocked in disk I/O.

Source
ReadAheadInputStream.java
Linear Supertypes
InputStream, Closeable, AutoCloseable, AnyRef, Any
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Inherited
  1. ReadAheadInputStream
  2. InputStream
  3. Closeable
  4. AutoCloseable
  5. AnyRef
  6. Any
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Visibility
  1. Public
  2. Protected

Instance Constructors

  1. new ReadAheadInputStream(inputStream: InputStream, bufferSizeInBytes: Int)

Value Members

  1. def available(): Int
    Definition Classes
    ReadAheadInputStream → InputStream
    Annotations
    @Override()
  2. def close(): Unit
    Definition Classes
    ReadAheadInputStream → InputStream → Closeable → AutoCloseable
    Annotations
    @Override()
  3. def mark(arg0: Int): Unit
    Definition Classes
    InputStream
  4. def markSupported(): Boolean
    Definition Classes
    InputStream
  5. def read(b: Array[Byte], offset: Int, len: Int): Int
    Definition Classes
    ReadAheadInputStream → InputStream
    Annotations
    @Override()
  6. def read(): Int
    Definition Classes
    ReadAheadInputStream → InputStream
    Annotations
    @Override()
  7. def read(arg0: Array[Byte]): Int
    Definition Classes
    InputStream
    Annotations
    @throws(classOf[java.io.IOException])
  8. def readAllBytes(): Array[Byte]
    Definition Classes
    InputStream
    Annotations
    @throws(classOf[java.io.IOException])
  9. def readNBytes(arg0: Array[Byte], arg1: Int, arg2: Int): Int
    Definition Classes
    InputStream
    Annotations
    @throws(classOf[java.io.IOException])
  10. def readNBytes(arg0: Int): Array[Byte]
    Definition Classes
    InputStream
    Annotations
    @throws(classOf[java.io.IOException])
  11. def reset(): Unit
    Definition Classes
    InputStream
    Annotations
    @throws(classOf[java.io.IOException])
  12. def skip(n: Long): Long
    Definition Classes
    ReadAheadInputStream → InputStream
    Annotations
    @Override()
  13. def skipNBytes(arg0: Long): Unit
    Definition Classes
    InputStream
    Annotations
    @throws(classOf[java.io.IOException])
  14. def transferTo(arg0: OutputStream): Long
    Definition Classes
    InputStream
    Annotations
    @throws(classOf[java.io.IOException])