閣樓貓的五四三 (About Cat)

Missing content-assist hot key in Eclipse Europe
After downloaded and installed Eclipse Eurpoe, I opened my project and start coding on it.
A terribe thing was happened, the powferful assist key , alt + / is (content assist) out of functionality..

Two hot keys, which are very important to me, are  'ctrl + 1' and 'alt + /'.
If no content assist, I will be very bothering when writting code.

I have no idea when import a third party 'Maze' class, how could I find its package (for import) faster then open it javadoc.

the 'alt+/' is set to 'word complete' , not 'content assist', and key of cntent assist is 'ctrl+space'.
but the hot key 'ctrl+space' is my input language switch key in windows OS. it is double conflict.

Solution is really simple.
1. disable the hot key of word complete, since content assist is more powerful then word complete.
2. set hot key of content assist to 'alt+/'

Hibernate使用Proxool Connection Pool後,發生後端Exception

23:35:42,140  WARN AbstractBatcher:229 - exception clearing maxRows/queryTimeout
java.sql.SQLException: Invalid state, the PreparedStatement object is closed.
        at net.sourceforge.jtds.jdbc.JtdsPreparedStatement.checkOpen(JtdsPreparedStatement.java:186)
        at net.sourceforge.jtds.jdbc.JtdsStatement.getMaxRows(JtdsStatement.java:722)
        at sun.reflect.GeneratedMethodAccessor93.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at org.logicalcobwebs.proxool.ProxyStatement.invoke(ProxyStatement.java:68)
        at org.logicalcobwebs.cglib.proxy.Proxy$ProxyImpl$$EnhancerByCGLIB$$3a2eeb80.getMaxRows(<generated>)
        at org.hibernate.jdbc.AbstractBatcher.closeQueryStatement(AbstractBatcher.java:225)
        at org.hibernate.jdbc.AbstractBatcher.closeQueryStatement(AbstractBatcher.java:162)
        at org.hibernate.impl.AbstractScrollableResults.close(AbstractScrollableResults.java:94)
        at com.infinitiessoft.ouac.jsp.admin.p0005.UserRolesArtifact.refresh(UserRolesArtifact.java:116)
        at com.infinitiessoft.ouac.jsp.admin.UnitUserManagement.prerender(UnitUserManagement.java:1720)
        at com.sun.rave.web.ui.appbase.faces.ViewHandlerImpl.prerender(ViewHandlerImpl.java:860)
        at com.sun.rave.web.ui.appbase.faces.ViewHandlerImpl.renderView(ViewHandlerImpl.java:295)
        at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:87)
        at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:221)
        at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:117)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:198)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
        at com.sun.rave.web.ui.util.UploadFilter.doFilter(UploadFilter.java:194)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
        at com.infinitiessoft.ouac.jsp.OUACFilter.doFilter(OUACFilter.java:144)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
        at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
        at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
        at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
        at java.lang.Thread.run(Thread.java:534)

200 private void closeQueryStatement(PreparedStatement ps) throws SQLException {
201
202         try {
203             //work around a bug in all known connection pools....
204             if ( ps.getMaxRows()!=0 ) ps.setMaxRows(0);
205             if ( ps.getQueryTimeout()!=0 ) ps.setQueryTimeout(0);
206         }catch (Exception e) {
208             log.warn("exception clearing maxRows/queryTimeout", e);
209             // ps.close(); //just close it; do NOT try to return it to the pool!
210             return; //NOTE: early exit!
211         }finally {
213             closeStatement(ps);
214         }
215
216         if ( lastQuery==ps ) lastQuery = null;
217         
218     }