锘??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>&#20234;&#20154;&#31934;&#21697;&#22312;&#32447;&#44;&#22269;&#20135;&#31934;&#21697;&#20037;&#20037;&#20037;&#20037;&#34588;&#33216;&#44;&#30007;&#20154;&#22825;&#22530;&#36164;&#28304;&#22312;&#32447;</title><link>http://www.aygfsteel.com/javaora/category/1810.html</link><description /><language>zh-cn</language><lastBuildDate>Tue, 27 Feb 2007 18:23:23 GMT</lastBuildDate><pubDate>Tue, 27 Feb 2007 18:23:23 GMT</pubDate><ttl>60</ttl><item><title>Hibernate鐨勭紦瀛樺鐞?/title><link>http://www.aygfsteel.com/javaora/archive/2005/06/22/6556.html</link><dc:creator>java涓栫晫鐣呰皥</dc:creator><author>java涓栫晫鐣呰皥</author><pubDate>Wed, 22 Jun 2005 09:32:00 GMT</pubDate><guid>http://www.aygfsteel.com/javaora/archive/2005/06/22/6556.html</guid><wfw:comment>http://www.aygfsteel.com/javaora/comments/6556.html</wfw:comment><comments>http://www.aygfsteel.com/javaora/archive/2005/06/22/6556.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/javaora/comments/commentRss/6556.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/javaora/services/trackbacks/6556.html</trackback:ping><description><![CDATA[<div   id="wmqeeuq"   class=sect2 lang=zh-cn>
<div   id="wmqeeuq"   class=titlepage>
<DIV>
<DIV>
<H3 class=title><A name=performance-cache-mapping></A>20.2.1.&nbsp;緙撳瓨鏄犲皠錛圕ache mappings錛?</H3></DIV></DIV>
<DIV></DIV></DIV>
<P>綾繪垨鑰呴泦鍚堟槧灝勭殑鈥?TT class=literal>&lt;cache&gt;</TT>鍏冪礌鈥濆彲浠ユ湁涓嬪垪褰㈠紡錛?</P>
<div   id="wmqeeuq"   class=programlistingco><PRE class=programlisting>&lt;cache 
    usage="transactional|read-write|nonstrict-read-write|read-only"  <span id="wmqeeuq"    class=co>(1)</SPAN>
/&gt;</PRE>
<div   id="wmqeeuq"   class=calloutlist>
<TABLE summary="Callout list" border=0>
<TBODY>
<TR>
<TD vAlign=top align=left width="5%">(1)</TD>
<TD vAlign=top align=left>
<P><TT class=literal>usage</TT>璇存槑浜?jiǎn)缂撳瓨鐨劷{栫暐: <TT class=literal>transactional</TT>銆?<TT class=literal>read-write</TT>銆?<TT class=literal>nonstrict-read-write</TT>鎴?<TT class=literal>read-only</TT>銆?</P></TD></TR></TBODY></TABLE></DIV></DIV>
<P>鍙﹀(棣栭�?), 浣犲彲浠ュ湪hibernate.cfg.xml涓寚瀹?TT class=literal>&lt;class-cache&gt;</TT>鍜?<TT class=literal>&lt;collection-cache&gt;</TT> 鍏冪礌銆?</P>
<P>榪欓噷鐨?TT class=literal>usage</TT> 灞炴�ф寚鏄庝簡(jiǎn)<span id="wmqeeuq"    class=emphasis><EM>緙撳瓨騫跺彂絳栫暐錛坈ache concurrency strategy錛?/EM></SPAN>銆?</P></DIV>
<div   id="wmqeeuq"   class=sect2 lang=zh-cn>
<div   id="wmqeeuq"   class=titlepage>
<DIV>
<DIV>
<H3 class=title><A name=performance-cache-readonly></A>20.2.2.&nbsp;絳栫暐錛氬彧璇葷紦瀛橈紙Strategy: read only錛?</H3></DIV></DIV>
<DIV></DIV></DIV>
<P>濡傛灉浣犵殑搴旂敤紼嬪簭鍙渶璇誨彇涓�涓寔涔呭寲綾葷殑瀹炰緥錛岃�屾棤闇�瀵瑰叾淇敼錛?閭ｄ箞灝卞彲浠ュ鍏惰繘琛?TT class=literal>鍙</TT> 緙撳瓨銆傝繖鏄渶綆�鍗曪紝涔熸槸瀹炵敤鎬ф渶濂界殑鏂規(guī)硶銆傜敋鑷沖湪闆嗙兢涓紝瀹冧篃鑳藉畬緹庡湴榪愪綔銆?</P><PRE class=programlisting>&lt;class name="eg.Immutable" mutable="false"&gt;
    &lt;cache usage="read-only"/&gt;
    ....
&lt;/class&gt;</PRE></DIV>
<div   id="wmqeeuq"   class=sect2 lang=zh-cn>
<div   id="wmqeeuq"   class=titlepage>
<DIV>
<DIV>
<H3 class=title><A name=performance-cache-readwrite></A>20.2.3.&nbsp; 絳栫暐:璇?鍐欑紦瀛橈紙Strategy: read/write錛?</H3></DIV></DIV>
<DIV></DIV></DIV>
<P>濡傛灉搴旂敤紼嬪簭闇�瑕佹洿鏂版暟鎹紝閭ｄ箞浣跨敤<TT class=literal>璇?鍐欑紦瀛?/TT> 姣旇緝鍚堥�傘�?濡傛灉搴旂敤紼嬪簭瑕佹眰鈥滃簭鍒楀寲浜嬪姟鈥濈殑闅旂綰у埆錛坰erializable transaction isolation level錛夛紝閭ｄ箞灝卞喅涓嶈兘浣跨敤榪欑緙撳瓨絳栫暐銆?濡傛灉鍦↗TA鐜涓嬌鐢ㄧ紦瀛橈紝浣犲繀欏繪寚瀹?TT class=literal>hibernate.transaction.manager_lookup_class</TT>灞炴�х殑鍊鹼紝 閫氳繃瀹冿紝Hibernate鎵嶈兘鐭ラ亾璇ュ簲鐢ㄧ▼搴忎腑JTA鐨?TT class=literal>TransactionManager</TT>鐨勫叿浣撶瓥鐣ャ�?鍦ㄥ叾瀹冪幆澧冧腑錛屼綘蹇呴』淇濊瘉鍦?TT class=literal>Session.close()</TT>銆佹垨<TT class=literal>Session.disconnect()</TT>璋冪敤鍓嶏紝 鏁翠釜浜嬪姟宸茬粡緇撴潫銆?濡傛灉浣犳兂鍦ㄩ泦緹ょ幆澧冧腑浣跨敤姝ょ瓥鐣ワ紝浣犲繀欏諱繚璇佸簳灞傜殑緙撳瓨瀹炵幇鏀寔閿佸畾(locking)銆侶ibernate鍐呯疆鐨勭紦瀛樼瓥鐣ュ茍涓嶆敮鎸侀攣瀹氬姛鑳姐�?</P><PRE class=programlisting>&lt;class name="eg.Cat" .... &gt;
    &lt;cache usage="read-write"/&gt;
    ....
    &lt;set name="kittens" ... &gt;
        &lt;cache usage="read-write"/&gt;
        ....
    &lt;/set&gt;
&lt;/class&gt;</PRE></DIV>
<div   id="wmqeeuq"   class=sect2 lang=zh-cn>
<div   id="wmqeeuq"   class=titlepage>
<DIV>
<DIV>
<H3 class=title><A name=performance-cache-nonstrict></A>20.2.4.&nbsp; 絳栫暐:闈炰弗鏍艱/鍐欑紦瀛橈紙Strategy: nonstrict read/write錛?</H3></DIV></DIV>
<DIV></DIV></DIV>
<P>濡傛灉搴旂敤紼嬪簭鍙伓灝?dāng)闇�瑕佹洿鏂版暟鎹紙涔熷氨鏄錛屼袱涓簨鍔″悓鏃舵洿鏂板悓涓�璁板綍鐨勬儏鍐靛緢涓嶅父瑙侊級(jí)錛屼篃涓嶉渶瑕佸崄鍒嗕弗鏍肩殑浜嬪姟闅旂錛?閭ｄ箞姣旇緝閫傚悎浣跨敤<TT class=literal>闈炰弗鏍艱/鍐欑紦瀛?/TT>絳栫暐銆傚鏋滃湪JTA鐜涓嬌鐢ㄨ絳栫暐錛?浣犲繀欏諱負(fù)鍏舵寚瀹?TT class=literal>hibernate.transaction.manager_lookup_class</TT>灞炴�х殑鍊鹼紝 鍦ㄥ叾瀹冪幆澧冧腑錛屼綘蹇呴』淇濊瘉鍦?TT class=literal>Session.close()</TT>銆佹垨<TT class=literal>Session.disconnect()</TT>璋冪敤鍓嶏紝 鏁翠釜浜嬪姟宸茬粡緇撴潫<BR><BR>-------------------------------------------------------------------------<BR>鍦╦BPM 涓嬌鐢ㄤ笉灝戣繖鏍風(fēng)殑闈炰弗鏍艱/鍐欑紦瀛樼殑澶勭悊錛?BR>&lt;?xml version="1.0"?&gt;</P>
<P>&lt;!DOCTYPE hibernate-mapping PUBLIC<BR>&nbsp;&nbsp;&nbsp; "-//Hibernate/Hibernate Mapping DTD 3.0//EN" <BR>&nbsp;&nbsp;&nbsp; "<A &gt;</P>
<P>&lt;hibernate-mapping default-access="field"&gt;</P>
<P>&nbsp; &lt;class name="org.jbpm.context.def.VariableAccess" <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; table="JBPM_VARIABLEACCESS"<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lazy="false"&gt;<BR>&nbsp;&nbsp;&nbsp; &lt;cache usage="nonstrict-read-write"/&gt;<BR>&nbsp;&nbsp;&nbsp; &lt;id name="id" column="ID_"&gt;&lt;generator class="native" /&gt;&lt;/id&gt;<BR>&nbsp;&nbsp;&nbsp; <BR>&nbsp;&nbsp;&nbsp; &lt;property name="variableName" column="VARIABLENAME_" /&gt;<BR>&nbsp;&nbsp;&nbsp; &lt;property name="access" column="ACCESS_" /&gt;<BR>&nbsp;&nbsp;&nbsp; &lt;property name="mappedName" column="MAPPEDNAME_" /&gt;<BR>&nbsp; &lt;/class&gt;</P>
<P>&lt;/hibernate-mapping&gt;<BR><BR>瀹冪殑ehcache.xml 鏄繖鏍烽厤緗殑錛?BR>&lt;ehcache&gt;<BR>&nbsp;&lt;defaultCache<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; maxElementsInMemory="100000"<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; eternal="true"<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; overflowToDisk="false"<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; diskPersistent="false"<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; /&gt;<BR>&lt;/ehcache&gt;</P></DIV><img src ="http://www.aygfsteel.com/javaora/aggbug/6556.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/javaora/" target="_blank">java涓栫晫鐣呰皥</a> 2005-06-22 17:32 <a href="http://www.aygfsteel.com/javaora/archive/2005/06/22/6556.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item></channel></rss>                                        <footer>
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