NIODataInputStream (apache-cassandra API)

java.lang.Object
- java.io.InputStream
- - org.apache.cassandra.io.util.DataInputPlus.DataInputStreamPlus
  - - org.apache.cassandra.io.util.RebufferingInputStream
    - - org.apache.cassandra.io.util.NIODataInputStream

All Implemented Interfaces:

java.io.Closeable, java.io.DataInput, java.lang.AutoCloseable, DataInputPlus
```
public class NIODataInputStream
extends RebufferingInputStream
```
Rough equivalent of BufferedInputStream and DataInputStream wrapping the input stream of a File or Socket Created to work around the fact that when BIS + DIS delegate to NIO for socket IO they will allocate large thread local direct byte buffers when a large array is used to read. There may also be some performance improvement due to using a DBB as the underlying buffer for IO and the removal of some indirection and delegation when it comes to reading out individual values, but that is not the goal. Closing NIODataInputStream will invoke close on the ReadableByteChannel provided at construction. NIODataInputStream is not thread safe.

Nested Class Summary
- Nested classes/interfaces inherited from interface org.apache.cassandra.io.util.DataInputPlus
  DataInputPlus.DataInputStreamPlus

Field Summary

Fields
Modifier and Type Field Description

protected java.nio.channels.ReadableByteChannel channel
- Fields inherited from class org.apache.cassandra.io.util.RebufferingInputStream
  buffer

Constructor Summary

Constructors
Constructor Description

NIODataInputStream(java.nio.channels.ReadableByteChannel channel, int bufferSize)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`int`	`available()`
`void`	`close()`
`protected void`	`reBuffer()`	Implementations must implement this method to refill the buffer.

Methods inherited from class org.apache.cassandra.io.util.RebufferingInputStream
read, read, readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readFully, readInt, readLine, readLong, readPrimitiveSlowly, readShort, readUnsignedByte, readUnsignedShort, readUnsignedVInt, readUnsignedVInt32, readUTF, readVInt, readVInt32, skipBytes

Methods inherited from class java.io.InputStream
mark, markSupported, nullInputStream, read, readAllBytes, readNBytes, readNBytes, reset, skip, transferTo

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

Methods inherited from interface org.apache.cassandra.io.util.DataInputPlus
skipBytesFully

- Field Detail
  - channel
```
protected final java.nio.channels.ReadableByteChannel channel
```
- Constructor Detail
  - NIODataInputStream
```
public NIODataInputStream(java.nio.channels.ReadableByteChannel channel,
                          int bufferSize)
```
- Method Detail
  - reBuffer
```
protected void reBuffer()
                 throws java.io.IOException
```
    Description copied from class: RebufferingInputStream
    
    Implementations must implement this method to refill the buffer. They can expect the buffer to be empty when this method is invoked.
    
    Specified by:
    
    reBuffer in class RebufferingInputStream
    
    Throws:
    
    java.io.IOException
  - close
```
public void close()
           throws java.io.IOException
```
    Specified by:
    
    close in interface java.lang.AutoCloseable
    
    Specified by:
    
    close in interface java.io.Closeable
    
    Overrides:
    
    close in class java.io.InputStream
    
    Throws:
    
    java.io.IOException
  - available
```
public int available()
              throws java.io.IOException
```
    Overrides:
    
    available in class java.io.InputStream
    
    Throws:
    
    java.io.IOException