�??xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/"><channel><title>&#x4E45;&#x4E45;&#x7EFC;&#x5408;&#x4E45;&#x4E45;&#x9B3C;&#x8272;&#x4E2D;&#x6587;&#x5B57;&#x2C;&#x5728;&#x7EBF;&#x89C2;&#x770B;&#x61;&#x76;&#x5F71;&#x7247;&#x2C;&#x39;&#x37;&#x5728;&#x7EBF;&#x89C2;&#x770B;&#x514D;&#x8D39;&#x89C2;&#x770B;</title><link>http://www.aygfsteel.com/hx9111/archive/2006/05/10/45512.html</link><dc:creator>我爱夏花,更爱�U�叶</dc:creator><author>我爱夏花,更爱�U�叶</author><pubDate>Wed, 10 May 2006 09:37:00 GMT</pubDate><guid>http://www.aygfsteel.com/hx9111/archive/2006/05/10/45512.html</guid><wfw:comment>http://www.aygfsteel.com/hx9111/comments/45512.html</wfw:comment><comments>http://www.aygfsteel.com/hx9111/archive/2006/05/10/45512.html#Feedback</comments><slash:comments>3</slash:comments><wfw:commentRss>http://www.aygfsteel.com/hx9111/comments/commentRss/45512.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/hx9111/services/trackbacks/45512.html</trackback:ping><description><![CDATA[ 
<p style="FONT-SIZE: 10pt; MARGIN: 0in; FONT-FAMILY: SimSun; mso-outline-level: 1">在现在的应用�pȝ��中几乎都能看到xml和database的��n�?与这两个东西正交的是OO.</p><ul><li><div style="FONT-SIZE: 10pt; MARGIN: 0in; FONT-FAMILY: SimSun; mso-outline-level: 1">XML &lt;==&gt; OO 影射的东西有很多,一般都是��用marshaller架构.</div></li></ul><p style="FONT-SIZE: 10pt; MARGIN: 0in; FONT-FAMILY: SimSun; mso-outline-level: 1"> </p><p style="FONT-SIZE: 10pt; MARGIN: 0in; FONT-FAMILY: SimSun; mso-outline-level: 1">(�q�里不说用于xml解析的dom和sax模型,只是说xml与pojo的媄���关�p?)其实再怎么影射也是通过dom或者sax接口的实现进行解析的,�q�是通过新的javaSE规范Streaming API for XML (StAX), xml和OO的媄���只不过�q�行了抽象封�?把xml到pojo之间的解析部分透明化了,我们�q�里实际说的其实是JavaEE5.0中一个新的规范Java Architecture for XML Binding (JAXB))</p><p style="FONT-SIZE: 10pt; MARGIN: 0in 0in 0in 0.5in; FONT-FAMILY: SimSun; mso-outline-level: 2">比较有名的框架有:</p><p style="FONT-SIZE: 10pt; MARGIN: 0in 0in 0in 0.5in; FONT-FAMILY: SimSun; mso-outline-level: 2">+ castor 比较有名的一个O/X影射框架,可以�Ҏ��xsd生成解析框架.(个�h比较喜欢使用�?<br /></p><p style="FONT-SIZE: 10pt; MARGIN: 0in 0in 0in 0.5in; FONT-FAMILY: SimSun; mso-outline-level: 2">+ apache 的xmlbean和Commons-Digester(不知道�ؓ什么会存在两个同样领域的东�?可能是digester相对来说比较����?因而它被许多的apache的开源项目���?;<br /></p><p style="FONT-SIZE: 10pt; MARGIN: 0in 0in 0in 0.5in; FONT-FAMILY: SimSun; mso-outline-level: 2">+ JAXB 是JAVAEE中的对于xml和OO对象Binding定制的新的规�?标准�?);<br /><br /></p><p style="FONT-SIZE: 10pt; MARGIN: 0in; FONT-FAMILY: SimSun; mso-outline-level: 1">实际要研�I�xml和OO的媄���框�?大家不妨看看现有的web service框架��׃��了解很多�?�����看Codehaus�?XFire 他是一个比较轻量��的WS框架,AXIS2也不�?</p><p style="FONT-SIZE: 10pt; MARGIN: 0in; FONT-FAMILY: SimSun; mso-outline-level: 1">我了解的XML Binding框架���p��么多,如果谁知道更好用的可以告诉我,相您��h��.</p><ul><li><div style="FONT-SIZE: 10pt; MARGIN: 0in; FONT-FAMILY: SimSun; mso-outline-level: 1">对于O/R mapping ��׃��用太说了,大家了解的可能都比我�?个�h只用�q�一下几�?</div></li></ul><p style="FONT-SIZE: 10pt; MARGIN: 0in 0in 0in 0.5in; FONT-FAMILY: SimSun; mso-outline-level: 2">+ hibernate ,ibatis ,jdo ,castor jdo(期待EJB3.0�U�的Persistence规范JPA)对于�q�几�U�框架的介绍��׃��说明�?google一下会出来无数.</p><p style="FONT-SIZE: 10pt; MARGIN: 0in; FONT-FAMILY: SimSun; mso-outline-level: 1"> </p><p style="FONT-SIZE: 10pt; MARGIN: 0in; FONT-FAMILY: SimSun; mso-outline-level: 1">?�q�里不是惌�����Z���U�技�?而是惛_��大家对XML到database的媄���有什么更好的办法,因�ؓO/X,O/R都有很好的框架了,是否有X/R的好的框�?</p><p style="FONT-SIZE: 10pt; MARGIN: 0in; FONT-FAMILY: SimSun; mso-outline-level: 1">�q�里我只知道castor 中对从xml到database有一定的支持,但支持的�q�是不够,hibernate3.0�U�好象对xml到database�q�行了支�?但是也是一些简单的支持.<br /><br />不断整理中。。�?/p><img src ="http://www.aygfsteel.com/hx9111/aggbug/45512.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/hx9111/" target="_blank">我爱夏花,更爱�U�叶</a> 2006-05-10 17:37 <a href="http://www.aygfsteel.com/hx9111/archive/2006/05/10/45512.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>�q�段旉���比较忙！可能没时间维护Blog了：�Q?/title><link>http://www.aygfsteel.com/hx9111/archive/2005/06/25/6705.html</link><dc:creator>我爱夏花,更爱�U�叶</dc:creator><author>我爱夏花,更爱�U�叶</author><pubDate>Sat, 25 Jun 2005 04:31:00 GMT</pubDate><guid>http://www.aygfsteel.com/hx9111/archive/2005/06/25/6705.html</guid><wfw:comment>http://www.aygfsteel.com/hx9111/comments/6705.html</wfw:comment><comments>http://www.aygfsteel.com/hx9111/archive/2005/06/25/6705.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/hx9111/comments/commentRss/6705.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/hx9111/services/trackbacks/6705.html</trackback:ping><description><![CDATA[<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=2><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">&nbsp;&nbsp;&nbsp;�q�几天在研究框架枉���层次的抽象问题，�q�有框架的一些集成问题，可能要没旉����l�护</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">Blog</SPAN></FONT><FONT size=2><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">�Q�框架的初期版本已经开发完毕了�Q�在几次初期的��用中�Q�反映还是不错的�Q�真是高兴。但是还有很多不���的地方�Q�下一阶段�Ҏ��架的开发，主要���是在调试和���试斚w���?BR><BR></SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=2><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>JBrain</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">框架的设计的初期目的���是要提供一个基本的企业�U�运行环境，���好�?/SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">JVM</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">一栗���而下一期开发的目标���是�?/SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">JBrain</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">框架的这一个运行环境的基础上，开发一套徏模语�a��Q��?/SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">JBrain</SPAN></FONT><FONT size=2><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">框架���是�q�种模型语言的运行环境�?BR><BR></SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=2><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">我们��Z���q�个目标都在研究</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">MDA</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">�Q�个������?/SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">MDA</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">的思想�?/SPAN><SPAN style="mso-bidi-font-weight: bold"> </SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">�?/SPAN><SPAN style="mso-bidi-font-weight: bold"> <SPAN lang=EN-US>Perfection</SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">”，但是实现他谈何容易，我们研究它只是研�I�它的思想�Q�通过�q�种思想�Q�能够给我们以启发�?BR>&nbsp;&nbsp;&nbsp;</SPAN></FONT></P><img src ="http://www.aygfsteel.com/hx9111/aggbug/6705.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/hx9111/" target="_blank">我爱夏花,更爱�U�叶</a> 2005-06-25 12:31 <a href="http://www.aygfsteel.com/hx9111/archive/2005/06/25/6705.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>白话自己心中的设计模�?/title><link>http://www.aygfsteel.com/hx9111/archive/2005/06/16/6238.html</link><dc:creator>我爱夏花,更爱�U�叶</dc:creator><author>我爱夏花,更爱�U�叶</author><pubDate>Thu, 16 Jun 2005 14:07:00 GMT</pubDate><guid>http://www.aygfsteel.com/hx9111/archive/2005/06/16/6238.html</guid><wfw:comment>http://www.aygfsteel.com/hx9111/comments/6238.html</wfw:comment><comments>http://www.aygfsteel.com/hx9111/archive/2005/06/16/6238.html#Feedback</comments><slash:comments>3</slash:comments><wfw:commentRss>http://www.aygfsteel.com/hx9111/comments/commentRss/6238.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/hx9111/services/trackbacks/6238.html</trackback:ping><description><![CDATA[<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT color=#000000><FONT size=2><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">&nbsp;&nbsp;&nbsp;再一�ơ的看设计模式的时候，感觉自己对设计模式，有了一个进一步的理解�Q�自我感觉的</SPAN><SPAN lang=EN-US style="FONT-FAMILY: Wingdings; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold; mso-char-type: symbol; mso-symbol-font-family: Wingdings"><SPAN style="mso-char-type: symbol; mso-symbol-font-family: Wingdings">J</SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">�Q?/SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">.<BR><BR><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT color=#000000><FONT size=2><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">在数学计���中我们要求</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">A</SPAN><SPAN lang=EN-US style="FONT-FAMILY: Wingdings; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold; mso-char-type: symbol; mso-symbol-font-family: Wingdings"><SPAN style="mso-char-type: symbol; mso-symbol-font-family: Wingdings">à</SPAN></SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">B</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">点的最短�\径，可能�?/SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">A</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">点到</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">B</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">�Ҏ��很多�U�走法，但是�q�求完美的我们（���其是程序员�Q�，��L��希望扑ֈ�一条最短的路径。设计模式也是相同，在设计中我们惌���扑ֈ�设计中的最短�\径，也就是设计的永恒之道�Q�就是设计模式中常说的无名的质）�Q�说白了�Q�就是如何设计才能�ɾpȝ��更容易扩张，更灵�z�，更稳定。模式追求的是一�U�最佳的解决�Ҏ���Q�在�q�个�Ҏ��的指��g���Q�我们能够跟好的��d��现我们所惌���实现的东�ѝ�?BR><BR></SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><o:p></o:p></SPAN></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT color=#000000><FONT size=2><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">数学计算的时候有一定的法则�Q���Y件设计的时候也是有一定的法则的，而这些法则，都是在追求��Y件设计的守恒定律时�Ş成的——什么开</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">/</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">闭原则，面向接口原则�Q�依赖倒置原则�{�等�Q�但是��Y件设计中的原则也是可变的�Q�而且是时��d��展的�Q�要不然��׃��会出玎ͼ�今天�?/SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">spring</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">非常火的场面�Q?/SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">Ioc</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">原则�?BR><BR></SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><o:p></o:p></SPAN></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT color=#000000><FONT size=2><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">数学计算是通过许多的公式推倒出�l�果的，但是我们求解的时候，会出现这�U�情况，</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">C</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">�l�果�Q�是通过</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">A</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">�?/SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">B</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">两个公式推导出来的，模式也是一��P��有一些较���的模式�Q�而这些较���的模式是一些较大的模式的基����?BR><BR></SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><o:p></o:p></SPAN></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT color=#000000><FONT size=2><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">在理解模式的时候我们可以从对象的生命周期来理解�?BR><BR></SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><o:p></o:p></SPAN></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT color=#000000><FONT size=2><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">对象产生的时候需要描�q�对象的属性，它的存在形式�Q�创建模式就是用来描�q�这个的�Q�而这个对象存在就会和其他对象发生联系�Q�就会和其他对象发生作用�Q�如何描�q�C��们之间的联系和作用就是结构模式要做的事了�Q�前面这些都是静态的�Q�对象的存在�Q�不可能永远静止不动的，它会�Ҏ��自己的需要，完成一些动作，语言中还有动词，名词�Q��Ş容词之分呢！模式���p��语言一样需要有动词来描�q�对象，行�ؓ模式���是用来描述对象的行动的�Q?BR><BR></SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><o:p></o:p></SPAN></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT color=#000000><FONT size=2><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">设计模式�Q�实际就是一�U�设计中的语�a��Q�很多的最基本的模式，���是�l�成�q�种语言的基����Q�我们在理解模式的时候不能只是背模式�Q�而应该灵�zȝ���q�用他们�Q�让他们有机的结合在一��P��形成一个生动的句子。这个就好比我们学英语，不是光背一些单词，���p��写出一���好文章的，�q�需要我们有语感�Q�理解了以后才能写出来�?BR><BR></SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><o:p></o:p></SPAN></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT color=#000000><FONT size=2><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">�q�个只是我对模式的一点点个�h的理解，不代表所有�h的观点！�Q�）</SPAN></FONT></FONT><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><o:p></o:p></SPAN></P><img src ="http://www.aygfsteel.com/hx9111/aggbug/6238.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/hx9111/" target="_blank">我爱夏花,更爱�U�叶</a> 2005-06-16 22:07 <a href="http://www.aygfsteel.com/hx9111/archive/2005/06/16/6238.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>事务的理解和jotm�Q�xapool的���?�Q?�Q?/title><link>http://www.aygfsteel.com/hx9111/archive/2005/06/11/5917.html</link><dc:creator>我爱夏花,更爱�U�叶</dc:creator><author>我爱夏花,更爱�U�叶</author><pubDate>Sat, 11 Jun 2005 10:13:00 GMT</pubDate><guid>http://www.aygfsteel.com/hx9111/archive/2005/06/11/5917.html</guid><wfw:comment>http://www.aygfsteel.com/hx9111/comments/5917.html</wfw:comment><comments>http://www.aygfsteel.com/hx9111/archive/2005/06/11/5917.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/hx9111/comments/commentRss/5917.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/hx9111/services/trackbacks/5917.html</trackback:ping><description><![CDATA[<SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"></SPAN><SPAN lang=EN-US><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><FONT size=2><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">对于中小型的应用</SPAN><SPAN lang=EN-US>tomcat</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">作�ؓ服务器就���_��了，但是�Q�在我把框架往</SPAN><SPAN lang=EN-US>tomcat</SPAN></FONT><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><FONT size=2>上�{�Uȝ��时候有了一个问题，工作���引擎的数据库是独立的，如何保证他和业务的数据库事务上的�l�一性，�q�里���涉及到分布式事务的概念�?BR><BR></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><FONT size=2><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">�?/SPAN><SPAN lang=EN-US>weblogic</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">�Q?/SPAN><SPAN lang=EN-US>websphere</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">�Q�这�U�企业��服务器，他们有自��q��事务���理器，你可以配�|�多�?/SPAN><SPAN lang=EN-US>datasource</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">�Q�这�?/SPAN><SPAN lang=EN-US>datasource</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">可以指向不同的资源（数据库，消息服务�Q�，事务���理器就是这些资源的���理中心�Q�当一个事务开始的时候（</SPAN><SPAN lang=EN-US>begin</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">�Q�，事务���理器会记录�q�监视这个事务涉及的所有可���理资源�Q�当一个事务结束的时候（</SPAN><SPAN lang=EN-US>commit</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">�Q�，他会把所有的资源提交�Q�而当�E�序出现异常的时候，他会把所有的资源回滚�Q?/SPAN><SPAN lang=EN-US>rollback</SPAN></FONT><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><FONT size=2>�Q�。在事务边界以内�Q�所有的可管理资源实际都是没有提交的�Q�处于一�U�等待状态，只有当事务提交的时候，事务���理器才负责把它所���理的所有资源提交。事务管理器���是一个全局事务���理中心�Q�它负责把许多可���理�Q�可以控制事务）的资源的事务�l�一��h���?BR><BR></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><FONT size=2><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">��Z���q�种�q�种考虑�Q�我在管理全局性事务的时候，选择�?/SPAN><SPAN lang=EN-US>jtom</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">�?/SPAN><SPAN lang=EN-US>xapool</SPAN></FONT><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><FONT size=2>�?BR><BR></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><FONT size=2><SPAN lang=EN-US>Jotm</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">是一个开源的</SPAN><SPAN lang=EN-US>JTA</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">实现�Q�是�?/SPAN><SPAN lang=EN-US>ObjectWeb</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">�l�织开发的�Q�实际就是实��C��事务���理器的功能�Q�而且他还支持分布式事务，如果�?/SPAN><SPAN lang=EN-US>jotm</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">�l�合</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">JORAM </SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">�Q�也是由</SPAN><SPAN lang=EN-US>ObjectWeb</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">�l�织开发的</SPAN><SPAN lang=EN-US>JMS</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">实现<SPAN style="mso-bidi-font-weight: bold">�Q���用，���可以实�?/SPAN></SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">JMS</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">的事务管理。（�q�里我在惻I��</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">JBossCache</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">是支持事务的</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">cache</SPAN></FONT><FONT size=2><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">�Q�如果把它们�l�合在一��P��是不是就可以对缓存进行事务控制了�Q�）�Q?BR><BR></SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><FONT size=2><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">对于</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">jotm</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">的��用，你只要记住这个应用中只有一�?/SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">Jotm</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">对象��?/SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">OK</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">了，对于分布式事务也是一��P��如何保证一个应用中只用一�?/SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">Jotm</SPAN></FONT><FONT size=2><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">实例呢？<BR><BR></SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 42pt; mso-char-indent-count: 4.0"><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><FONT size=2><FONT color=#a52a2a>jotmCurrent = Current.getCurrent();</FONT><BR><BR><o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=2><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">使用上面的方法，如果</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">jotmCurrent </SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">�{�于</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">null</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">�Q�说明现在的</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">jvm</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">中没有没�?/SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">jotm</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">实例�Q�当需要分布式的时候就不能�q�么判断了，你必���L��</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">jotm</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">对象攑ֈ�</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">jndi</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">上，以后使用的时候从</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">jndi</SPAN></FONT><FONT size=2><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">上取���可以了�?BR><BR></SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=2><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">如果</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">jotmCurrent</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">不等于空�Q�说�?/SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">jvm</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">中已�l�有</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">jotm</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">实例了，而如何得到这个实例了�Q�如果从�q�个角度去考虑�Q�是不行的，你可以看一�?/SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">Jotm</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">�?/SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">API</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">�Q�看一�?/SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">Current</SPAN></FONT><FONT size=2><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">的类说明�Q?BR><BR></SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><SPAN style="mso-spacerun: yes"><FONT size=2>&nbsp;<FONT color=#0000ff>&nbsp; </FONT></FONT></SPAN><A ><FONT color=#0000ff size=2>http://jotm.objectweb.org/current/jotm/jdoc/</FONT></A><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><o:p><FONT size=2>&nbsp;</FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=2><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN lang=EN-US>public class <B>Current</B> </SPAN></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 31.5pt; mso-char-indent-count: 3.0"><SPAN lang=EN-US><FONT size=2>extends </FONT><A ><FONT color=#0000ff size=2>Object</FONT></A><FONT size=2> </FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 36.75pt; mso-char-indent-count: 3.5"><SPAN lang=EN-US><FONT size=2>implements </FONT><A ><FONT color=#0000ff size=2>UserTransaction</FONT></A><FONT color=#0000ff size=2>, </FONT><A ><FONT color=#0000ff size=2>TransactionManager</FONT></A><FONT color=#0000ff size=2>, </FONT><A ><FONT color=#0000ff size=2>Referenceable</FONT></A><FONT color=#0000ff size=2>, </FONT><A ><FONT color=#0000ff size=2>Serializable</FONT></A><FONT size=2> <BR><BR></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=2><SPAN lang=EN-US style="mso-bidi-font-weight: bold">Current </SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">对象实际���是一个事务管理器�Q�哈哈，我们使用</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">jotm</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">�Q�不���是��Z���q�个吗，</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">ok</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">�Q?/SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">you got it</SPAN></FONT><FONT size=2><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">�Q?BR><BR></SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=2><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">我对</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">jotm</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">和事务的研究�q�不够深入，以上都是个�h理解�Q�有不对的地方还请大家指出！</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=2><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">下面的文章，我重点对</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">xapool</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-weight: bold">�q�行说明�Q���用他的时候问题特别多�Q�）�Q?/SPAN></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"></o:p></SPAN>&nbsp;</P><img src ="http://www.aygfsteel.com/hx9111/aggbug/5917.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/hx9111/" target="_blank">我爱夏花,更爱�U�叶</a> 2005-06-11 18:13 <a href="http://www.aygfsteel.com/hx9111/archive/2005/06/11/5917.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item></channel></rss>                                                                                                                                                                                                                     <footer>
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