Package io.deephaven.io

Class NioUtil

java.lang.Object

io.deephaven.io.NioUtil

public class NioUtil
extends Object

General utilities for NIO

Constructor Summary

Constructors

Constructor	Description
NioUtil()

Method Summary

Modifier and Type	Method	Description
static Selector	reduceSelectorGarbage(Selector selector)	Use reflection to change the collection implementations so iteration operations used in the selector implementation will not produce garbage.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

NioUtil

public NioUtil()

Method Details

reduceSelectorGarbage

public static Selector reduceSelectorGarbage(Selector selector)

Use reflection to change the collection implementations so iteration operations used in the selector implementation will not produce garbage.

This is only applied when the system property java.specification.version is equal to "1.8".

We can do this because, by looking at the source code, we can tell that there are no simultaneous iterations so reusing one iterator is OK. Because of concurrent modification issues and thread safety issues, this is generally likely to be the case anyway. The implementation of selector is not likely to change between minor JDK revisions. A major JDK release might produce a rewrite, but in that case we can check the JDK version and apply the appropriate set of patches.