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Triones Runtime: 修改java.net.URL對(duì)象支持多個(gè)StreamHandlerFactory的注冊(cè)

發(fā)表于 2004-12-26 18:59:04

?思路：

1、將URL對(duì)象中的factory對(duì)象擴(kuò)展為一個(gè)factorys的Hashtable對(duì)象，將setURLStreamHandlerFactory的調(diào)用修改為將新的factory對(duì)象放入列表。

2、創(chuàng)建Handler時(shí)則遍歷factorys列表，按照注冊(cè)的先后順序調(diào)用factory對(duì)象嘗試創(chuàng)建Handler對(duì)象。

實(shí)際解決方案：

通過java自帶的源代碼包找出 java.net.URL對(duì)象，做如下修改：

1、增加 factorys 列表屬性

static Hashtable factorys = new Hashtable();

…..

2、修改 setURLStreamHandlerFactory() 方法

public static void setURLStreamHandlerFactory(URLStreamHandlerFactory fac) {

?????? synchronized (streamHandlerLock) {

????????????? // 為了支持多Factory

//???? ??? if (factory != null) {

//??????????? throw new Error("factory already defined");

//???? ??? }

????????????? …..

?????? ??? factory = fac;

?????? ??? // 將factory 放入列表

?????? ??? factorys.put(Integer.toString(factorys.size()), fac);

?????? }

??? }

1、? 增加createURLStreamHandler 私有方法，通過Factory列表創(chuàng)建Handler

?????? private static URLStreamHandler createURLStreamHandler(String protocol) {

????????????? for (int i=0; i < factorys.size(); i++) {

???????????????????? factory = (URLStreamHandlerFactory) factorys.get(Integer.toString(i));

???????????????????? URLStreamHandler handler = factory.createURLStreamHandler(protocol);

???????????????????? if (handler != null) {

??????????????????????????? return handler;

???????????????????? }

????????????? }

????????????? return null;

?????? }

2、? 修改getURLStreamHandler中獲取Handler的方法

…..

?????? ??? // Use the factory (if any)

//???? ??? if (factory != null) {

//??????????? handler = factory.createURLStreamHandler(protocol);

//??????????? checkedWithFactory = true;

//???? ??? }

?????? ??? // 使用factory列表

?????? ??? if (factorys != null) {

?????? ??? ?????? handler = createURLStreamHandler(protocol);

?????? ??? ?????? checkedWithFactory = true;

?????? ??? }

????????????? ……

????????????? // Check with factory if another thread set a

????????????? // factory since our last check

//??????????? if (!checkedWithFactory && factory != null) {

//??????????? ??? handler2 = factory.createURLStreamHandler(protocol);

//??????????? }

????????????? if (!checkedWithFactory && factorys != null) {

????????????? ??? handler2 = createURLStreamHandler(protocol);

????????????? }

3、? 編譯修改后的URL類，將URL.class 替換 rt.jar 包中的原始類文件。

替換rt.jar的具體方法：

a)?????? 用zip工具（或jar工具）將rt.jar文件解開到一個(gè)目錄（假設(shè)為rt）

b)????? 替換 rt/java/net/URL.class 文件為新類文件

c)????? 在 rt 目錄下運(yùn)行命令 jar cvf0M rt.jar . 生成 rt.jar 文件

d)????? 將新生成的 rt.jar 文件覆蓋原始的JRE中的 rt.jar 文件

至此，以上ava.lang.Error: factory already defined問題解決。

Triones Runtime: 新的JRE下，Triones web系統(tǒng)運(yùn)行的輸出結(jié)果

2004-12-26 1:10:07 org.apache.coyote.http11.Http11Protocol init

信息 : Initializing Coyote HTTP/1.1 on http-8886

2004-12-26 1:10:07 org.apache.catalina.startup.Catalina load

信息 : Initialization processed in 1121 ms

2004-12-26 1:10:07 org.apache.catalina.core.StandardService start

信息 : Starting service Tomcat-Standalone

2004-12-26 1:10:07 org.apache.catalina.core.StandardEngine start

信息 : Starting Servlet Engine: Apache Tomcat/5.0.28

2004-12-26 1:10:07 org.apache.catalina.core.StandardHost start

信息 : XML validation disabled

[ 注 ] 這里是 Triones(Eclipse) 開始啟動(dòng)

Configuration file:

??? file:/D:/netshop/configuration/config.ini not found or not read

Configuration location:

??? file:/D:/netshop/triones/configuration/

Configuration file:

??? file:/D:/netshop/triones/configuration/config.ini loaded

Shared configuration location:

??? file:/D:/netshop/configuration/

Triones Framework located:

??? file:/D:/netshop/triones/plugins/org.softme.triones.runtime_0.0.1/

Framework located:

??? file:/D:/netshop/triones/plugins/org.eclipse.osgi_3.1.0/

Loading framework classpath from:

??? file:/D:/netshop/triones/plugins/org.eclipse.osgi_3.1.0/eclipse.properties

Framework classpath:

??? file:/D:/netshop/triones/plugins/org.eclipse.osgi_3.1.0/core.jar

??? file:/D:/netshop/triones/plugins/org.eclipse.osgi_3.1.0/console.jar

??? file:/D:/netshop/triones/plugins/org.eclipse.osgi_3.1.0/osgi.jar

??? file:/D:/netshop/triones/plugins/org.eclipse.osgi_3.1.0/resolver.jar

??? file:/D:/netshop/triones/plugins/org.eclipse.osgi_3.1.0/defaultAdaptor.jar

??? file:/D:/netshop/triones/plugins/org.eclipse.osgi_3.1.0/eclipseAdaptor.jar

Debug options:

??? file:/D:/DevEnv/eclipse/.options not found

Time to load bundles: 30

!SESSION 2004-12-26 01:10:09.697 -----------------------------------------------

eclipse.buildId=M200409161125

java.version=1.4.2

java.vendor=Sun Microsystems Inc.

BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=zh_CN

Command-line arguments: -nosplash -refresh

[ 注 ] 這里是 Triones Framework (Runtime) 開始運(yùn)行

Starting application: 1563

------------------------------------

Triones Framework: Started!

Triones Framework: Hello!

2004-12-26 1:10:10 org.apache.catalina.core.StandardHost getDeployer

信息 : Create Host deployer for direct deployment ( non-jmx )

2004-12-26 1:10:10 org.apache.coyote.http11.Http11Protocol start

信息 : Starting Coyote HTTP/1.1 on http-8886

2004-12-26 1:10:10 org.apache.catalina.startup.Catalina start

信息 : Server startup in 2634 ms

[ 注 ] 這里是 Triones Framework (System Job) 開始運(yùn)行， Tomcat 已經(jīng)啟動(dòng)完畢。

Triones Job: begin...

Triones Job: idle-0

Triones Job: idle-1

Triones Job: done.

[ 注 ] 這里是 Triones Framework (Runtime) 開始響應(yīng) web 請(qǐng)求，加載 Runtime 的控制器

[URL]http://localhost:8886/netshop/

LoadControllers(): found extentions - 1

LoadControllers(): namespace - org.softme.triones.runtime.

LoadControllers(): config size- 3

LoadController:-org.softme.triones.controller.DefaultServletController@d0220c

LoadController:-org.softme.triones.controller.DefaultActionController@1a19458

LoadController:-org.softme.triones.controller.DefaultViewController@383118

[ 注 ] 這里是 Triones Framework (Runtime) 根據(jù)請(qǐng)求訪問指定的插件

URL ： http://localhost:8886/netshop/triones/view/org.softme.triones.hello/hello.html

update@/D:/netshop/triones/plugins/org.softme.triones.hello_0.0.1/ [7]

hello.html

file:/D:/netshop/triones/plugins/org.softme.triones.hello_0.0.1/hello.html

[ 注 ] 這里 Tomcat 開始關(guān)閉

2004-12-26 1:10:49 org.apache.coyote.http11.Http11Protocol pause

信息 : Pausing Coyote HTTP/1.1 on http-8886

2004-12-26 1:10:50 org.apache.catalina.core.StandardService stop

信息 : Stopping service Tomcat-Standalone

2004-12-26 1:10:50 org.apache.catalina.core.StandardHostDeployer remove

[ 注 ] 這里是 Tomcat 關(guān)閉 Triones Framework 支持的應(yīng)用 (netshop)

信息 : Removing web application at context path /netshop

[ 注 ] 這里是 Triones Framework (Runtime) 關(guān)閉

Triones Framework: Stoped!

------------------------------------

2004-12-26 1:10:50 org.apache.catalina.logger.LoggerBase stop

信息 : unregistering logger Standalone:type=Logger,host=localhost

2004-12-26 1:10:50 org.apache.catalina.logger.LoggerBase stop

信息 : unregistering logger Standalone:type=Logger

2004-12-26 1:10:50 org.apache.coyote.http11.Http11Protocol destroy

信息 : Stopping Coyote HTTP/1.1 on http-8886

[ 注 ] Tomcat 正常退出

不得窺道門，不得悟佛門，不得入窄門，實(shí)乃破門。

posted on 2006-03-27 10:30 破門閱讀(708) 評(píng)論(0) 編輯收藏所屬分類: Triones

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相關(guān)文章: Eclipse 測(cè)試框架分析（未完） Triones Runtime: 修改java.net.URL對(duì)象支持多個(gè)StreamHandlerFactory的注冊(cè) Triones Runtime: 利用Eclipse Plugin支持Web應(yīng)用 Triones Framework Runtime 關(guān)于Eslipse (3.0) ClassLoader 問題的分析

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