From: markt <markt@13f79535-47bb-0310-9956-ffa450edef68>
Date: Tue, 29 Jan 2008 23:37:08 +0000 (+0000)
Subject: Better fix for 43878. If we aren't re-loading, use a single class loader for JSPs... 
X-Git-Url: https://git.internetallee.de/?a=commitdiff_plain;h=ca23403ff6dfc47da03cc52092f7cf7aad1c9ceb;p=tomcat7.0

Better fix for 43878. If we aren't re-loading, use a single class loader for JSPs and tag files to reduce perm gen space usage

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@616563 13f79535-47bb-0310-9956-ffa450edef68
---

diff --git a/java/org/apache/jasper/JspCompilationContext.java b/java/org/apache/jasper/JspCompilationContext.java
index 574105686..5a4504261 100644
--- a/java/org/apache/jasper/JspCompilationContext.java
+++ b/java/org/apache/jasper/JspCompilationContext.java
@@ -34,7 +34,6 @@ import org.apache.jasper.compiler.JspRuntimeContext;
 import org.apache.jasper.compiler.JspUtil;
 import org.apache.jasper.compiler.Localizer;
 import org.apache.jasper.compiler.ServletWriter;
-import org.apache.jasper.servlet.JasperLoader;
 import org.apache.jasper.servlet.JspServletWrapper;
 
 /**
@@ -176,11 +175,7 @@ public class JspCompilationContext {
 
     public ClassLoader getJspLoader() {
         if( jspLoader == null ) {
-            jspLoader = new JasperLoader
-            (new URL[] {baseUrl},
-                    getClassLoader(),
-                    rctxt.getPermissionCollection(),
-                    rctxt.getCodeSource());
+            jspLoader = rctxt.getJspLoader(baseUrl, getClassLoader());
         }
         return jspLoader;
     }
diff --git a/java/org/apache/jasper/compiler/JspRuntimeContext.java b/java/org/apache/jasper/compiler/JspRuntimeContext.java
index 6e4fe069b..c2fffa772 100644
--- a/java/org/apache/jasper/compiler/JspRuntimeContext.java
+++ b/java/org/apache/jasper/compiler/JspRuntimeContext.java
@@ -38,6 +38,7 @@ import org.apache.jasper.JspCompilationContext;
 import org.apache.jasper.Options;
 import org.apache.jasper.runtime.JspFactoryImpl;
 import org.apache.jasper.security.SecurityClassLoad;
+import org.apache.jasper.servlet.JasperLoader;
 import org.apache.jasper.servlet.JspServletWrapper;
 import org.apache.juli.logging.Log;
 import org.apache.juli.logging.LogFactory;
@@ -155,6 +156,7 @@ public final class JspRuntimeContext {
     private ServletContext context;
     private Options options;
     private URLClassLoader parentClassLoader;
+    private JasperLoader jspLoader;
     private PermissionCollection permissionCollection;
     private CodeSource codeSource;                    
     private String classpath;
@@ -317,6 +319,26 @@ public final class JspRuntimeContext {
     }
 
 
+    /**
+     * Obtain the classloader to use when loading JSP resources. In development
+     * mode or when running background compilations, each JSP has a separate
+     * classloader to enable easy re-loading of modified JSPs. If not in
+     * development mode, a single loader is used to reduce perm gen usage when
+     * many JSPs all use the same handful of tags.
+     */
+    public URLClassLoader getJspLoader(URL baseUrl, ClassLoader parent) {
+        if (options.getDevelopment() || lastCheck > -1) {
+            return new JasperLoader(new URL[] {baseUrl}, parent,
+                    permissionCollection, codeSource);
+        }
+        if (jspLoader == null) {
+            jspLoader = new JasperLoader(new URL[] {baseUrl}, parent,
+                    permissionCollection, codeSource);
+        }
+        return jspLoader;
+    }
+
+
     // -------------------------------------------------------- Private Methods