IovArray (Netty API Reference (4.1.16.Final))

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java.lang.Object
- io.netty.channel.unix.IovArray

All Implemented Interfaces:

ChannelOutboundBuffer.MessageProcessor
```
public final class IovArray
extends Object
implements ChannelOutboundBuffer.MessageProcessor
```
Represent an array of struct array and so can be passed directly over via JNI without the need to do any more array copies. The buffers are written out directly into direct memory to match the struct iov. See also man writev.
```
 struct iovec {
   void  *iov_base;
   size_t iov_len;
 };
 
```
See also Efficient JNI programming IV: Wrapping native data objects.

Constructor Summary

Constructors
Constructor and Description

IovArray()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`add(ByteBuf buf)` Try to add the given `ByteBuf`.
`void`	`clear()`
`int`	`count()` Returns the number if iov entries.
`long`	`memoryAddress(int offset)` Returns the `memoryAddress` for the given `offset`.
`boolean`	`processMessage(Object msg)` Will be called for each flushed message until it either there are no more flushed messages or this method returns `false`.
`long`	`processWritten(int index, long written)` Process the written iov entries.
`void`	`release()` Release the `IovArray`.
`long`	`size()` Returns the size in bytes

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

- Constructor Detail
  - IovArray
```
public IovArray()
```
- Method Detail
  - clear
```
public void clear()
```
  - add
```
public boolean add(ByteBuf buf)
```
    Try to add the given ByteBuf. Returns true on success, false otherwise.
  - processWritten
```
public long processWritten(int index,
                           long written)
```
    Process the written iov entries. This will return the length of the iov entry on the given index if it is smaller then the given written value. Otherwise it returns -1.
  - count
```
public int count()
```
    Returns the number if iov entries.
  - size
```
public long size()
```
    Returns the size in bytes
  - memoryAddress
```
public long memoryAddress(int offset)
```
    Returns the memoryAddress for the given offset.
  - release
```
public void release()
```
    Release the IovArray. Once release further using of it may crash the JVM!
  - processMessage
```
public boolean processMessage(Object msg)
                       throws Exception
```
    Description copied from interface: ChannelOutboundBuffer.MessageProcessor
    
    Will be called for each flushed message until it either there are no more flushed messages or this method returns false.
    
    Specified by:
    
    processMessage in interface ChannelOutboundBuffer.MessageProcessor
    
    Throws:
    
    Exception

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