我们巨匠都知道,在措置多线程处事并发时,因为建树线程需要占用良多的系统资本,所觉得了避免这些不需要的损耗,凡是我们采用线程池来解决这些问题。% g8 U0 M; i: a
线程池的根基事理是,首先建树并连结必然数目的线程,当需要使用线程时,我们年夜池中取得线程,再将需要运行的使命交给线程进行措置,当使命完成后再将扑晔着回池中。
1 }/ E# M( g/ L9 L2 @6 u 下面,我给出一个很简单的实现模子,仅供参考。5 y3 R3 }6 P% w& u/ u
ThreadPool.java
$ u/ v; }6 Y+ P! o package org.loon.framework.util.test;3 M+ U% f) p3 Q [& x
import java.util.LinkedList;
, [0 r- u6 D7 d3 x/ ]9 U# X import java.util.List;
* [& ~ {' k3 w! Y9 Z /** */ /** R Z2 ~ O$ D! t
*, X+ M3 Z2 i/ B1 p# ^
* Title: LoonFramework
3 a9 I8 d+ H6 I( @ *9 A% D- v; [ B6 O
** w- G# ^$ i! A6 }6 j7 N- g
* Description:7 V X7 A! {; b) u9 ~' @ e5 Y
*, o- K5 `- u' h! s; H+ _5 J( S
*8 p9 v7 M0 x/ A& v. Q
* Copyright: Copyright (c) 2007
( H- H% k0 c1 J2 [5 m5 w *. {) f, S7 W3 L
*
8 s* e" U) \! d. A& l * Company: LoonFramework b5 [( h8 E2 Z1 D0 m8 s {
*0 \) G9 x4 L2 ]5 g: m
*
2 H. m# |4 ]( Y- r0 H! ` * @author chenpeng
1 o6 G" f& d: [% Q( Z * @email:ceponline@yahoo.com.cn
/ a8 G" y% E5 t6 } * @version 0.1$ E: N% A( m- I* F+ a
*/8 j, s# z& T* T# y; r& [; o
public class ThreadPool ... {
( a* [* O, }$ t/ m8 L private static ThreadPool instance = null ;2 i& ~/ }+ b/ Z- a, m# X. v( c7 }1 W1 }
// 优先级低
) ^# h( m% B& i) |% N+ [7 B public static final int PRIORITY_LOW = 0 ;) Q6 ]. a: d$ F
// 通俗
" k; y9 L2 \( Q: \) l! ` public static final int PRIORITY_NORMAL = 1 ;) A/ |& ]0 Y+ k- D6 H8 \/ P$ N
// 高) L U& @! O! G- ~# d+ p
public static final int PRIORITY_HIGH = 2 ;- ~( o4 X& s6 t8 b
// 用以保留余暇毗连
" P- z9 H! s% \4 @8 |) O private List[] _idxThreads;+ h8 I8 W( R: [1 Z7 H7 I g
// 封锁' y' W6 W4 W: Z4 J0 k
private boolean _shutdown = false ;
i q/ y; _: X$ c+ v4 ?& A // 线程数目
" [( H# G" {- V2 K+ K private int _threadCount = 0 ;/ u! U& ~0 F$ f) K& ^% `0 A7 d
// debug信息是否输出* w8 x/ Y i8 y; o! \1 M* k! h
private boolean _debug = false ;
. T- m; N$ E! F$ U; u Z1 a3 x /** */ /**# [: ?/ p8 t: h: p
* 返回ThreadPool实例
& _# I( w/ ^( z! o5 l7 b% H: D *( p' \+ u! q# U" M$ r: ^6 g
* @return
$ P0 g" `/ \7 A7 O* Y */
' x; ~3 Q/ d t { public static ThreadPool getInstance() ... {2 [; J* N9 Z' t& M/ d
if (instance == null ) ... {7 x& w/ {+ C2 E+ o
instance = new ThreadPool();
4 Z3 {+ K% `- X* f }: c: X; y6 P o. X, }
return instance;
4 W! R! \# p$ l9 s( a1 \, r; ^- f }
+ u0 u) M! a8 C4 b* l0 W4 i0 W // 初始化线程list1 C7 c/ {$ [8 |. a7 I/ U+ A
private ThreadPool() ... {( H+ T" h# t7 `8 B. M) [# F3 z8 n3 Z
this ._idxThreads = new List[] ... { new LinkedList(), new LinkedList(),
% R. @% @- J% p9 V new LinkedList() } ; o5 `+ N, \- t$ y( d
this ._threadCount = 0 ;2 j! n$ k* K* k6 Q$ C
}
' }$ T9 T3 w0 F$ b /** */ /**# Y. z" A5 y3 K8 q2 x( o
* 同步体例,完成使命后将资本放回线程池中% F. x; A2 M9 w& Z
* @param repool |