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  敏捷(Agile)开发的灵魂是演化(evolutionåQ?其具体的˜q‡ç¨‹è¡¨çް䏸™„Pä»? (iteration)åQŒè„P代的每一步就是重æž?refactor)åQŒè€Œå•元测è¯?unit test)与持¾l­é›†æˆ?continuous integration)模拟了程序生存的环境åQˆçº¦æŸï¼‰åQŒæ˜¯merciless refactoring的技术保障。从数学上我们知道è„P代æ€ÀLœ‰ä¸ªæ”¶æ•›é—®é¢˜ã€‚一些重型方法将变化åQˆæ— è®ºæ˜¯æ­£æ–¹å‘还是反方向的)½{‰ä­h于风险,而們֐‘于消除开å? 中的不确定性,其中的è„P代是­‘‹äºŽ˜q…速收敛的。敏æïLš„˜q­ä»£æ˜¯å¼€æ”‘Ö¼çš„ï¼Œå¼ø™°ƒæ‹¥æŠ±å˜åŒ–。敏æïL¼–½E‹æŽ’斥过度设计,除了˜q‡åº¦è®¾è®¡ä¼šå¢žåŠ æˆæœ¬ä¹‹å¤–ï¼Œå¦ä¸€ä¸ªåŽŸå› å°±æ˜¯è¿‡ 度设计会é˜È¢é‡æž„åQŒé˜»¼„å˜åŒ–。敏æïLš„目标不是僵化的稳定性而是灉|´»çš„适应性。当然敏捯‚„P代本íw«åƈ不能保证¾pȝ»ŸæŒä¹…的适应性,即ä‹É是自然界中的˜q­ä»£å’Œæ¼”化, å¤ÞpÓ|的案例也是比比皆是。大量的生物物种在经历了历史的辉煌之后最¾lˆä»ç„‰™š¾å…è¢«å²æœˆæ‰€åŸ‹è‘¬ã€?br>
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使用Ldap˜qžæŽ¥æ±?/title><link>http://www.aygfsteel.com/Hut/archive/2005/08/01/8942.html</link><dc:creator>Hut</dc:creator><author>Hut</author><pubDate>Mon, 01 Aug 2005 09:21:00 GMT</pubDate><guid>http://www.aygfsteel.com/Hut/archive/2005/08/01/8942.html</guid><wfw:comment>http://www.aygfsteel.com/Hut/comments/8942.html</wfw:comment><comments>http://www.aygfsteel.com/Hut/archive/2005/08/01/8942.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/Hut/comments/commentRss/8942.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/Hut/services/trackbacks/8942.html</trackback:ping><description><![CDATA[<!--StartFragment --> æ¥æºåQ?A >http://java.sun.com/products/jndi/tutorial/ldap/connect/pool.html</A><BR><BR>SampleåQ?BR><PRE>import javax.naming.*;<BR>import javax.naming.directory.*;<BR><BR>import java.util.Hashtable;<BR><BR>/**<BR> * Demonstrates how to enable connection pooling. Use debug option<BR> * to observe connection usage.<BR> *<BR> * usage: java -Dcom.sun.jndi.ldap.connect.pool.debug=fine UsePool<BR> */<BR>class UsePool {<BR> public static void main(String[] args) {<BR> // Set up environment for creating initial context<BR> Hashtable env = new Hashtable(11);<BR> env.put(Context.INITIAL_CONTEXT_FACTORY, <BR> "com.sun.jndi.ldap.LdapCtxFactory");<BR> env.put(Context.PROVIDER_URL, "ldap://localhost:389/o=JNDITutorial");<BR><BR> // Enable connection pooling<BR> env.put("com.sun.jndi.ldap.connect.pool", "true");<BR><BR> try {<BR> // Create one initial context (Get connection from pool)<BR> DirContext ctx = new InitialDirContext(env);<BR><BR> System.out.println(ctx.getAttributes("ou=NewHires"));<BR><BR> // do something useful with ctx<BR><BR> // Close the context when we're done<BR> ctx.close(); // Return connection to pool<BR><BR> // Create another initial context (Get connection from pool)<BR> DirContext ctx2 = new InitialDirContext(env);<BR><BR> System.out.println(ctx2.getAttributes("ou=People"));<BR><BR> // do something useful with ctx2<BR><BR> // Close the context when we're done<BR> ctx2.close(); // Return connection to pool<BR><BR> } catch (NamingException e) {<BR> e.printStackTrace();<BR> }<BR> }<BR>}</PRE><A name=TIMEOUT> <H4>Creation Timeout</H4></A>The pool of connections maintained by the LDAP service provider may be limited in size; this is described in detail in the <A >Connection Pooling Configuration</A> section. When connection pooling has been enabled and no pooled connection is available, the client application will block, waiting for an available connection. You can use the <TT>"com.sun.jndi.ldap.connect.timeout"</TT> environment property to specify how long to wait for a pooled connection. If you omit this property, the application will wait indefinitely. <P>This same property is also used to specify a timeout period for establishment of the LDAP connection, as described in the <A >Connection Creation</A> section. </P> <H4>When Not to Use Pooling</H4>Pooled connections are intended to be reused. Therefore, if you plan to perform operations on a <TT>Context</TT> instance that might alter the underlying connection's state, then you should not use connection pooling for that <TT>Context</TT> instance. For example, if you plan to invoke the Start TLS extended operation on a <TT>Context</TT> instance, or plan to change security-related properties (such as <TT>"java.naming.security.principal"</TT> or <TT>"java.naming.security.protocol"</TT>) after the initial context has been created, you should not use connection pooling for that <TT>Context</TT> instance because the LDAP provider does not track any such state changes. If you use connection pooling in such situations, you might be compromising the security of your application.<BR><BR>----------------------------------------------------------------------------------------------------<BR> <H2>Connection Pooling Configuration</H2><A >http://java.sun.com/products/jndi/tutorial/ldap/connect/config.html</A> <img src ="http://www.aygfsteel.com/Hut/aggbug/8942.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/Hut/" target="_blank">Hut</a> 2005-08-01 17:21 <a href="http://www.aygfsteel.com/Hut/archive/2005/08/01/8942.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item></channel></rss> <footer> <div class="friendship-link"> <a href="http://www.aygfsteel.com/" title="狠狠久久亚洲欧美专区_中文字幕亚洲综合久久202_国产精品亚洲第五区在线_日本免费网站视频">狠狠久久亚洲欧美专区_中文字幕亚洲综合久久202_国产精品亚洲第五区在线_日本免费网站视频</a> </div> </footer> Ö÷Õ¾Ö©Öë³ØÄ£°å£º <a href="http://" target="_blank">ÐÂÖñÏØ</a>| <a href="http://" target="_blank">±¦Ó¦ÏØ</a>| <a href="http://" target="_blank">ÐÂç­ÏØ</a>| <a href="http://" target="_blank">½£ºÓÏØ</a>| <a href="http://" target="_blank">ÄêϽ£ºÊÐÏ½Çø</a>| <a href="http://" target="_blank">ÔªÄ±ÏØ</a>| <a href="http://" target="_blank">ÉϸßÏØ</a>| <a href="http://" target="_blank">¶¨°²ÏØ</a>| <a href="http://" target="_blank">¶¨±ßÏØ</a>| <a href="http://" target="_blank">Î÷ºÍÏØ</a>| <a href="http://" target="_blank">ÀÈ·»ÊÐ</a>| <a href="http://" target="_blank">¾Ą̊ÊÐ</a>| <a href="http://" target="_blank">°²¸£ÏØ</a>| <a href="http://" target="_blank">¶«°¢ÏØ</a>| <a href="http://" target="_blank">ÆÕÀ¼µêÊÐ</a>| <a href="http://" target="_blank">¸ß°²ÊÐ</a>| <a href="http://" target="_blank">Ì©ÄþÏØ</a>| <a href="http://" target="_blank">ºÚÁú½­Ê¡</a>| <a href="http://" target="_blank">ËþºÓÏØ</a>| <a href="http://" target="_blank">á°¸ÞÏØ</a>| <a href="http://" target="_blank">Îå»ªÏØ</a>| <a href="http://" target="_blank">ÈýÃ÷ÊÐ</a>| <a href="http://" target="_blank">ÖζàÏØ</a>| <a href="http://" target="_blank">ÂêÄÉË¹ÏØ</a>| <a href="http://" target="_blank">Í¨Î¼ÏØ</a>| <a href="http://" target="_blank">ÉÇβÊÐ</a>| <a href="http://" target="_blank">ÁéÊ¯ÏØ</a>| <a href="http://" target="_blank">ÓàÇìÏØ</a>| <a href="http://" target="_blank">º¼ÖÝÊÐ</a>| <a href="http://" target="_blank">ÐóÇÏØ</a>| <a href="http://" target="_blank">´óÁ¬ÊÐ</a>| <a href="http://" target="_blank">Íå×ÐÇø</a>| <a href="http://" target="_blank">Áú½­ÏØ</a>| <a href="http://" target="_blank">½¨Ë®ÏØ</a>| <a href="http://" target="_blank">¶ëɽ</a>| <a href="http://" target="_blank">¶¨ÏåÏØ</a>| <a href="http://" target="_blank">È«½·ÏØ</a>| <a href="http://" target="_blank">°²»¯ÏØ</a>| <a href="http://" target="_blank">ºì°²ÏØ</a>| <a href="http://" target="_blank">¶¨ÌÕÏØ</a>| <a href="http://" target="_blank">ÎàÖÝÊÐ</a>| <script> (function(){ var bp = document.createElement('script'); var curProtocol = window.location.protocol.split(':')[0]; if (curProtocol === 'https') { bp.src = 'https://zz.bdstatic.com/linksubmit/push.js'; } else { bp.src = 'http://push.zhanzhang.baidu.com/push.js'; } var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(bp, s); })(); </script> </body>