Author: rjung
Date: Mon Jan 25 16:07:20 2016
New Revision: 1726651
URL: http://svn.apache.org/viewvc?rev=1726651&view=rev
Log:
Replace regexp based filtering code in the class
loader by hand tuned code.
This is in the hot code path and the hand tuned
code needs only between 5 and 20% of the execution
time of the regexp matching.
The code structure should not make it too hard
to extend it to more packages in the future.
Modified:
tomcat/trunk/java/org/apache/catalina/loader/WebappClassLoaderBase.java
Modified:
tomcat/trunk/java/org/apache/catalina/loader/WebappClassLoaderBase.java
URL:
http://svn.apache.org/viewvc/tomcat/trunk/java/org/apache/catalina/loader/WebappClassLoaderBase.java?rev=1726651&r1=1726650&r2=1726651&view=diff
==============================================================================
--- tomcat/trunk/java/org/apache/catalina/loader/WebappClassLoaderBase.java
(original)
+++ tomcat/trunk/java/org/apache/catalina/loader/WebappClassLoaderBase.java Mon
Jan 25 16:07:20 2016
@@ -62,8 +62,6 @@ import java.util.concurrent.ThreadPoolEx
import java.util.jar.Attributes;
import java.util.jar.Attributes.Name;
import java.util.jar.Manifest;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
import org.apache.catalina.Container;
import org.apache.catalina.Globals;
@@ -267,53 +265,6 @@ public abstract class WebappClassLoaderB
// ----------------------------------------------------- Instance Variables
/**
- * Synchronization object for access to packageTriggersDeny
- * and packageTriggersPermit; Matchers are not thread-safe.
- */
- private final Object packageTriggerLock = new Object();
-
-
- /**
- * Regular expression of package names which are not allowed to be loaded
- * from a webapp class loader as classes without delegating first.
- */
- private final Matcher classPackageTriggersDeny = Pattern.compile(
- "^(?:javax\\.(?:el|security\\.auth\\.message|servlet|websocket)|" +
-
"org\\.apache\\.(?:catalina|coyote|el|jasper|juli|naming|tomcat))\\."
- ).matcher("");
-
-
- /**
- * Regular expression of package names which are not allowed to be loaded
- * from a webapp class loader as resources without delegating first.
- */
- private final Matcher resourcePackageTriggersDeny = Pattern.compile(
- "^(?:javax/(?:el|security/auth/message|servlet|websocket)|" +
- "org/apache/(?:catalina|coyote|el|jasper|juli|naming|tomcat))/"
- ).matcher("");
-
-
- /**
- * Regular expression of package names which are allowed to be loaded from
a
- * webapp class loader as classes without delegating first.
- * These take precedence over those set via {@link
#classPackageTriggersDeny}.
- */
- private final Matcher classPackageTriggersPermit =
- Pattern.compile("^(?:javax\\.servlet\\.jsp\\.jstl|" +
- "org\\.apache\\.tomcat\\.jdbc)\\.").matcher("");
-
-
- /**
- * Regular expression of package names which are allowed to be loaded from
a
- * webapp class loader as resources without delegating first.
- * These take precedence over those set via {@link
#resourcePackageTriggersDeny}.
- */
- private final Matcher resourcePackageTriggersPermit =
- Pattern.compile("^(?:javax/servlet/jsp/jstl|" +
- "org/apache/tomcat/jdbc)/").matcher("");
-
-
- /**
* Associated web resources for this webapp.
*/
protected WebResourceRoot resources = null;
@@ -2812,26 +2763,71 @@ public abstract class WebappClassLoaderB
if (name == null)
return false;
- synchronized(packageTriggerLock) {
- if (isClassName) {
- classPackageTriggersPermit.reset(name);
- if (classPackageTriggersPermit.lookingAt()) {
+ char ch;
+ if (name.startsWith("javax")) {
+ /* 5 == length("javax") */
+ ch = name.charAt(5);
+ if (isClassName && ch == '.') {
+ /* 6 == length("javax.") */
+ if (name.startsWith("servlet.jsp.jstl.", 6)) {
return false;
}
- classPackageTriggersDeny.reset(name);
- if (classPackageTriggersDeny.lookingAt()) {
+ if (name.startsWith("el.", 6) ||
+ name.startsWith("servlet.", 6) ||
+ name.startsWith("websocket.", 6) ||
+ name.startsWith("security.auth.message.", 6)) {
return true;
}
- } else {
- resourcePackageTriggersPermit.reset(name);
- if (resourcePackageTriggersPermit.lookingAt()) {
+ } else if (!isClassName && ch == '/') {
+ /* 6 == length("javax/") */
+ if (name.startsWith("servlet/jsp/jstl/", 6)) {
return false;
}
- resourcePackageTriggersDeny.reset(name);
- if (resourcePackageTriggersDeny.lookingAt()) {
+ if (name.startsWith("el/", 6) ||
+ name.startsWith("servlet/", 6) ||
+ name.startsWith("websocket/", 6) ||
+ name.startsWith("security/auth/message/", 6)) {
return true;
}
}
+ } else if (name.startsWith("org")) {
+ /* 3 == length("org") */
+ ch = name.charAt(3);
+ if (isClassName && ch == '.') {
+ /* 4 == length("org.") */
+ if (name.startsWith("apache.", 4)) {
+ /* 11 == length("org.apache.") */
+ if (name.startsWith("tomcat.jdbc.", 11)) {
+ return false;
+ }
+ if (name.startsWith("el.", 11) ||
+ name.startsWith("catalina.", 11) ||
+ name.startsWith("jasper.", 11) ||
+ name.startsWith("juli.", 11) ||
+ name.startsWith("tomcat.", 11) ||
+ name.startsWith("naming.", 11) ||
+ name.startsWith("coyote.", 11)) {
+ return true;
+ }
+ }
+ } else if (!isClassName && ch == '/') {
+ /* 4 == length("org/") */
+ if (name.startsWith("apache/", 4)) {
+ /* 11 == length("org/apache/") */
+ if (name.startsWith("tomcat/jdbc/", 11)) {
+ return false;
+ }
+ if (name.startsWith("el/", 11) ||
+ name.startsWith("catalina/", 11) ||
+ name.startsWith("jasper/", 11) ||
+ name.startsWith("juli/", 11) ||
+ name.startsWith("tomcat/", 11) ||
+ name.startsWith("naming/", 11) ||
+ name.startsWith("coyote/", 11)) {
+ return true;
+ }
+ }
+ }
}
return false;
}
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