react

Class Closeable.Util

java.lang.Object

react.Closeable.Util

Enclosing interface:

Closeable

public static class Closeable.Util
extends Object

Provides some Closeable-related utilities.

Field Summary

Fields

Modifier and Type	Field and Description
static Closeable	NOOP A closable which no-ops on close(react.Closeable) and throws an exception for all other methods.

Constructor Summary

Constructors

Constructor and Description
Util()

Method Summary

Modifier and Type	Method and Description
static Closeable	close(Closeable con) Closes con and returns NOOP.
static Closeable	join(Closeable... cons) Creates a closable that closes multiple connections at once.

Methods inherited from class java.lang.Object

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

Field Detail

NOOP

public static final Closeable NOOP

A closable which no-ops on close(react.Closeable) and throws an exception for all other methods. This is for the following code pattern:

 Closable _conn = Closeable.Util.NOOP;
 void open () {
    _conn = whatever.connect(...);
 }
 void close () {
    _conn = Closeable.Util.close(_conn);
 }
 

In that it allows close to avoid a null check if it's possible for close to be called with no call to open or repeatedly.

Constructor Detail

Util

public Util()

Method Detail

join

public static Closeable join(Closeable... cons)

Creates a closable that closes multiple connections at once.

close

public static Closeable close(Closeable con)

Closes con and returns NOOP. This enables code like: con = Connection.close(con); which simplifies disconnecting and resetting to NOOP, a given connection reference.