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remm pushed a commit to branch master
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The following commit(s) were added to refs/heads/master by this push:
new c7457dc Add new connector attribute to control facade recycling
c7457dc is described below
commit c7457dcbd2e7b347addfa204a33604435da9c4c6
Author: remm <r...@apache.org>
AuthorDate: Wed Jan 22 15:35:37 2020 +0100
Add new connector attribute to control facade recycling
Enabled by default for now due to likely low performance impact [I will
need to actually verify that]. The benefit of the default switch is that
we don't need to initialize the default value with the system property.
One system property down.
---
java/org/apache/catalina/connector/Connector.java | 37 ++++++++++++++++++-----
java/org/apache/catalina/connector/Request.java | 14 +++++++--
java/org/apache/catalina/connector/Response.java | 3 +-
webapps/docs/changelog.xml | 4 +++
webapps/docs/config/http.xml | 9 ++++++
webapps/docs/config/systemprops.xml | 6 ----
webapps/docs/security-howto.xml | 10 +++---
7 files changed, 61 insertions(+), 22 deletions(-)
diff --git a/java/org/apache/catalina/connector/Connector.java
b/java/org/apache/catalina/connector/Connector.java
index 515d2af..f37f027 100644
--- a/java/org/apache/catalina/connector/Connector.java
+++ b/java/org/apache/catalina/connector/Connector.java
@@ -25,6 +25,7 @@ import java.util.HashSet;
import javax.management.ObjectName;
+import org.apache.catalina.Globals;
import org.apache.catalina.LifecycleException;
import org.apache.catalina.LifecycleState;
import org.apache.catalina.Service;
@@ -56,13 +57,6 @@ public class Connector extends LifecycleMBeanBase {
private static final Log log = LogFactory.getLog(Connector.class);
- /**
- * Alternate flag to enable recycling of facades.
- */
- public static final boolean RECYCLE_FACADES =
-
Boolean.parseBoolean(System.getProperty("org.apache.catalina.connector.RECYCLE_FACADES",
"false"));
-
-
public static final String INTERNAL_EXECUTOR_NAME = "Internal";
@@ -165,6 +159,16 @@ public class Connector extends LifecycleMBeanBase {
/**
+ * The flag that controls recycling of the facades of the request
+ * processing objects. If set to <code>true</code> the object facades
+ * will be discarded when the request is recycled. If the security
+ * manager is enabled, this setting is ignored and object facades are
+ * always discarded.
+ */
+ protected boolean discardFacades = true;
+
+
+ /**
* The redirect port for non-SSL to SSL redirects.
*/
protected int redirectPort = 443;
@@ -373,6 +377,25 @@ public class Connector extends LifecycleMBeanBase {
/**
+ * @return <code>true</code> if the object facades are discarded, either
+ * when the discardFacades value is <code>true</code> or when the
+ * security manager is enabled.
+ */
+ public boolean getDiscardFacades() {
+ return discardFacades || Globals.IS_SECURITY_ENABLED;
+ }
+
+
+ /**
+ * Set the recycling strategy for the object facades.
+ * @param discardFacades the new value of the flag
+ */
+ public void setDiscardFacades(boolean discardFacades) {
+ this.discardFacades = discardFacades;
+ }
+
+
+ /**
* @return the "enable DNS lookups" flag.
*/
public boolean getEnableLookups() {
diff --git a/java/org/apache/catalina/connector/Request.java
b/java/org/apache/catalina/connector/Request.java
index a4860d5..edff176 100644
--- a/java/org/apache/catalina/connector/Request.java
+++ b/java/org/apache/catalina/connector/Request.java
@@ -463,7 +463,7 @@ public class Request implements HttpServletRequest {
recycleSessionInfo();
recycleCookieInfo(false);
- if (Globals.IS_SECURITY_ENABLED || Connector.RECYCLE_FACADES) {
+ if (getDiscardFacades()) {
parameterMap = new ParameterMap<>();
} else {
parameterMap.setLocked(false);
@@ -474,7 +474,7 @@ public class Request implements HttpServletRequest {
applicationMapping.recycle();
applicationRequest = null;
- if (Globals.IS_SECURITY_ENABLED || Connector.RECYCLE_FACADES) {
+ if (getDiscardFacades()) {
if (facade != null) {
facade.clear();
facade = null;
@@ -554,6 +554,16 @@ public class Request implements HttpServletRequest {
/**
+ * Get the recycling strategy of the facade objects.
+ * @return the value of the flag as set on the connector, or
+ * <code>true</code> if no connector is associated with this request
+ */
+ public boolean getDiscardFacades() {
+ return (connector == null) ? true : connector.getDiscardFacades();
+ }
+
+
+ /**
* Filter chain associated with the request.
*/
protected FilterChain filterChain = null;
diff --git a/java/org/apache/catalina/connector/Response.java
b/java/org/apache/catalina/connector/Response.java
index 70baffb..fce5570 100644
--- a/java/org/apache/catalina/connector/Response.java
+++ b/java/org/apache/catalina/connector/Response.java
@@ -43,7 +43,6 @@ import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpServletResponseWrapper;
import org.apache.catalina.Context;
-import org.apache.catalina.Globals;
import org.apache.catalina.Session;
import org.apache.catalina.security.SecurityUtil;
import org.apache.catalina.util.SessionConfig;
@@ -219,7 +218,7 @@ public class Response implements HttpServletResponse {
isCharacterEncodingSet = false;
applicationResponse = null;
- if (Globals.IS_SECURITY_ENABLED || Connector.RECYCLE_FACADES) {
+ if (getRequest().getDiscardFacades()) {
if (facade != null) {
facade.clear();
facade = null;
diff --git a/webapps/docs/changelog.xml b/webapps/docs/changelog.xml
index 940a2ff..d462162 100644
--- a/webapps/docs/changelog.xml
+++ b/webapps/docs/changelog.xml
@@ -54,6 +54,10 @@
<subsection name="Catalina">
<changelog>
<update>
+ Refactor recycle facade system property into a new connector attribute
+ named <code>discardFacades</code> and enable it by default. (remm)
+ </update>
+ <update>
Update to Jakarta Servlet 5.0, Jakarta Server Pages 3.0. Jakarta
Expression Language 4.0, Jakarta WebSocket 2.0, Jakarta Authentication
2.0 and Jakarta Annotations 2.0. (markt)
diff --git a/webapps/docs/config/http.xml b/webapps/docs/config/http.xml
index f3c868d..54fbd42 100644
--- a/webapps/docs/config/http.xml
+++ b/webapps/docs/config/http.xml
@@ -94,6 +94,15 @@
<code>_default_</code> will be used.</p>
</attribute>
+ <attribute name="discardFacades" required="false">
+ <p>A boolean value which can be used to enable or disable the recycling
+ of the facade objects that isolate the container internal request
+ processing objects. If set to <code>true</code> the facades will be
+ set for garbage collection after every request, otherwise they will be
+ reused. This setting has no effect when the security manager is enabled.
+ If not specified, this attribute is set to <code>true</code>.</p>
+ </attribute>
+
<attribute name="enableLookups" required="false">
<p>Set to <code>true</code> if you want calls to
<code>request.getRemoteHost()</code> to perform DNS lookups in
diff --git a/webapps/docs/config/systemprops.xml
b/webapps/docs/config/systemprops.xml
index 9294817..06623c8 100644
--- a/webapps/docs/config/systemprops.xml
+++ b/webapps/docs/config/systemprops.xml
@@ -262,12 +262,6 @@
<properties>
- <property name="org.apache.catalina.connector. RECYCLE_FACADES">
- <p>If this is <code>true</code> or if a security manager is in use a new
- facade object will be created for each request.</p>
- <p>If not specified, the default value of <code>false</code> will be
used.</p>
- </property>
-
<property
name="org.apache.catalina.connector. CoyoteAdapter.ALLOW_BACKSLASH">
<p>If this is <code>true</code> the '\' character will be permitted as a
diff --git a/webapps/docs/security-howto.xml b/webapps/docs/security-howto.xml
index 8b3d14d..b54a7dc 100644
--- a/webapps/docs/security-howto.xml
+++ b/webapps/docs/security-howto.xml
@@ -258,6 +258,11 @@
handle the response from a TRACE request (which exposes the browser to an
XSS attack), support for TRACE requests is disabled by default.</p>
+ <p>The <strong>discardFacades</strong> attribute set to <code>true</code>
+ will cause a new facade object to be created for each request. This is
+ the default value, and this reduces the chances of a bug in an
+ application exposing data from one request to another.</p>
+
<p>The <strong>maxPostSize</strong> attribute controls the maximum size
of a POST request that will be parsed for parameters. The parameters are
cached for the duration of the request so this is limited to 2MB by
@@ -449,11 +454,6 @@
</section>
<section name="System Properties">
- <p>Setting <strong>org.apache.catalina.connector.RECYCLE_FACADES</strong>
- system property to <code>true</code> will cause a new facade object to be
- created for each request. This reduces the chances of a bug in an
- application exposing data from one request to another.</p>
-
<p>The <strong>
org.apache.catalina.connector.CoyoteAdapter.ALLOW_BACKSLASH</strong> and
<strong>org.apache.tomcat.util.buf.UDecoder.ALLOW_ENCODED_SLASH</strong>
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