-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Chuck,
On 5/19/2009 12:37 PM, Caldarale, Charles R wrote: >> From: Dola Woolfe [mailto:dolac...@yahoo.com] Subject: How to hot >> swap classes? >> >> When developing a web application I change my classes all the time >> and therefore need to restart tomcat every time. > > No, you only need to restart the webapp; there's no need to restart > Tomcat. > >> Could it hot swap the new class in? > > No, but it's something that some of us have talked about. > >> (It does somehow hot swap recompiled .jsp's doesn't it?) > > There's a separate classloader for each JSP, but just one classloader > for the rest of the webapp. Did you mean "a separate ClassLoader for all the JSPs"? I ran jmap -histo while loading several JSP files that had never been loaded (I know, because I copied them into the webapp's deployment directory just for this test) and no additional ClassLoaders were allocated: jmap -histo 1430 | grep ClassLoader 125: 22 1232 sun.reflect.DelegatingClassLoader 314: 1 160 org.apache.catalina.loader.WebappClassLoade 340: 4 128 java.lang.ClassLoader$NativeLibrary 437: 1 72 sun.misc.Launcher$ExtClassLoader 443: 1 72 org.apache.catalina.loader.StandardClassLoader 447: 1 72 sun.misc.Launcher$AppClassLoader 495: 1 56 java.util.ResourceBundle$RBClassLoader 522: 3 48 com.sun.jmx.mbeanserver.ClassLoaderRepositorySupport$LoaderEntry 564: 2 40 [Lcom.sun.jmx.mbeanserver.ClassLoaderRepositorySupport$LoaderEntry; 650: 1 24 com.sun.jmx.mbeanserver.ClassLoaderRepositorySupport 723: 1 16 com.sun.jmx.mbeanserver.SecureClassLoaderRepository 805: 1 8 java.net.URLClassLoader$7 None of those numbers increased as I loaded more JSPs. - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkoS/+oACgkQ9CaO5/Lv0PBR9gCgg/uLYLCgYaHc53DxQMwQ62zE FGAAoK7kSZMzQuJN8RoKsXhEdvYKY0ln =V4Z4 -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
