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Posted to dev@tomcat.apache.org by kk...@apache.org on 2011/11/10 02:50:54 UTC
svn commit: r1200089 -
/tomcat/trunk/java/org/apache/catalina/connector/Request.java
Author: kkolinko
Date: Thu Nov 10 01:50:53 2011
New Revision: 1200089
URL: http://svn.apache.org/viewvc?rev=1200089&view=rev
Log:
Refactor special attribute names handling,
to use hash table lookup + adapter class, instead of series of name.equals() tests.
Extracted add/change/remove notification delivery into separate methods.
Modified:
tomcat/trunk/java/org/apache/catalina/connector/Request.java
Modified: tomcat/trunk/java/org/apache/catalina/connector/Request.java
URL: http://svn.apache.org/viewvc/tomcat/trunk/java/org/apache/catalina/connector/Request.java?rev=1200089&r1=1200088&r2=1200089&view=diff
==============================================================================
--- tomcat/trunk/java/org/apache/catalina/connector/Request.java (original)
+++ tomcat/trunk/java/org/apache/catalina/connector/Request.java Thu Nov 10 01:50:53 2011
@@ -863,32 +863,10 @@ public class Request
@Override
public Object getAttribute(String name) {
- if (name.equals(Globals.DISPATCHER_TYPE_ATTR)) {
- return (internalDispatcherType == null)
- ? DispatcherType.REQUEST
- : internalDispatcherType;
- } else if (name.equals(Globals.DISPATCHER_REQUEST_PATH_ATTR)) {
- return (requestDispatcherPath == null)
- ? getRequestPathMB().toString()
- : requestDispatcherPath.toString();
- }
-
- if (name.equals(Globals.ASYNC_SUPPORTED_ATTR)) {
- return asyncSupported;
- }
-
- if (name.equals(Globals.GSS_CREDENTIAL_ATTR)) {
- if (userPrincipal instanceof GenericPrincipal) {
- return ((GenericPrincipal) userPrincipal).getGssCredential();
- }
- return null;
- }
-
- if (name.equals(Globals.PARAMETER_PARSE_FAILED_ATTR)) {
- if (coyoteRequest.getParameters().isParseFailed()) {
- return Boolean.TRUE;
- }
- return null;
+ // Special attributes
+ SpecialAttributeAdapter adapter = specialAttributes.get(name);
+ if (adapter != null) {
+ return adapter.get(this, name);
}
Object attr=attributes.get(name);
@@ -1408,9 +1386,6 @@ public class Request
*/
@Override
public void removeAttribute(String name) {
- Object value = null;
- boolean found = false;
-
// Remove the specified attribute
// Check for read only attribute
// requests are per thread so synchronization unnecessary
@@ -1423,37 +1398,16 @@ public class Request
coyoteRequest.getAttributes().remove(name);
}
- found = attributes.containsKey(name);
+ boolean found = attributes.containsKey(name);
if (found) {
- value = attributes.get(name);
+ Object value = attributes.get(name);
attributes.remove(name);
- } else {
- return;
- }
- // Notify interested application event listeners
- Object listeners[] = context.getApplicationEventListeners();
- if ((listeners == null) || (listeners.length == 0)) {
+ // Notify interested application event listeners
+ notifyAttributeRemoved(name, value);
+ } else {
return;
}
- ServletRequestAttributeEvent event =
- new ServletRequestAttributeEvent(context.getServletContext(),
- getRequest(), name, value);
- for (int i = 0; i < listeners.length; i++) {
- if (!(listeners[i] instanceof ServletRequestAttributeListener)) {
- continue;
- }
- ServletRequestAttributeListener listener =
- (ServletRequestAttributeListener) listeners[i];
- try {
- listener.attributeRemoved(event);
- } catch (Throwable t) {
- ExceptionUtils.handleThrowable(t);
- context.getLogger().error(sm.getString("coyoteRequest.attributeEvent"), t);
- // Error valve will pick this exception up and display it to user
- attributes.put(RequestDispatcher.ERROR_EXCEPTION, t);
- }
- }
}
@@ -1478,21 +1432,13 @@ public class Request
return;
}
- if (name.equals(Globals.DISPATCHER_TYPE_ATTR)) {
- internalDispatcherType = (DispatcherType)value;
- return;
- } else if (name.equals(Globals.DISPATCHER_REQUEST_PATH_ATTR)) {
- requestDispatcherPath = value;
+ // Special attributes
+ SpecialAttributeAdapter adapter = specialAttributes.get(name);
+ if (adapter != null) {
+ adapter.set(this, name, value);
return;
}
- if (name.equals(Globals.ASYNC_SUPPORTED_ATTR)) {
- this.asyncSupported = (Boolean)value;
- }
-
- Object oldValue = null;
- boolean replaced = false;
-
// Add or replace the specified attribute
// Check for read only attribute
// requests are per thread so synchronization unnecessary
@@ -1520,10 +1466,7 @@ public class Request
value = canonicalPath;
}
- oldValue = attributes.put(name, value);
- if (oldValue != null) {
- replaced = true;
- }
+ Object oldValue = attributes.put(name, value);
// Pass special attributes to the native layer
if (name.startsWith("org.apache.tomcat.")) {
@@ -1531,19 +1474,27 @@ public class Request
}
// Notify interested application event listeners
+ notifyAttributeAssigned(name, value, oldValue);
+ }
+
+
+ /**
+ * Notify interested listeners that attribute has been assigned a value.
+ */
+ private void notifyAttributeAssigned(String name, Object value,
+ Object oldValue) {
Object listeners[] = context.getApplicationEventListeners();
if ((listeners == null) || (listeners.length == 0)) {
return;
}
+ boolean replaced = (oldValue != null);
ServletRequestAttributeEvent event = null;
if (replaced) {
- event =
- new ServletRequestAttributeEvent(context.getServletContext(),
- getRequest(), name, oldValue);
+ event = new ServletRequestAttributeEvent(
+ context.getServletContext(), getRequest(), name, oldValue);
} else {
- event =
- new ServletRequestAttributeEvent(context.getServletContext(),
- getRequest(), name, value);
+ event = new ServletRequestAttributeEvent(
+ context.getServletContext(), getRequest(), name, value);
}
for (int i = 0; i < listeners.length; i++) {
@@ -1562,7 +1513,36 @@ public class Request
ExceptionUtils.handleThrowable(t);
context.getLogger().error(sm.getString("coyoteRequest.attributeEvent"), t);
// Error valve will pick this exception up and display it to user
- attributes.put(RequestDispatcher.ERROR_EXCEPTION, t );
+ attributes.put(RequestDispatcher.ERROR_EXCEPTION, t);
+ }
+ }
+ }
+
+
+ /**
+ * Notify interested listeners that attribute has been removed.
+ */
+ private void notifyAttributeRemoved(String name, Object value) {
+ Object listeners[] = context.getApplicationEventListeners();
+ if ((listeners == null) || (listeners.length == 0)) {
+ return;
+ }
+ ServletRequestAttributeEvent event =
+ new ServletRequestAttributeEvent(context.getServletContext(),
+ getRequest(), name, value);
+ for (int i = 0; i < listeners.length; i++) {
+ if (!(listeners[i] instanceof ServletRequestAttributeListener)) {
+ continue;
+ }
+ ServletRequestAttributeListener listener =
+ (ServletRequestAttributeListener) listeners[i];
+ try {
+ listener.attributeRemoved(event);
+ } catch (Throwable t) {
+ ExceptionUtils.handleThrowable(t);
+ context.getLogger().error(sm.getString("coyoteRequest.attributeEvent"), t);
+ // Error valve will pick this exception up and display it to user
+ attributes.put(RequestDispatcher.ERROR_EXCEPTION, t);
}
}
}
@@ -3108,4 +3088,94 @@ public class Request
return true;
}
+
+ // ----------------------------------------------------- Special attributes handling
+
+ private static interface SpecialAttributeAdapter {
+ Object get(Request request, String name);
+
+ void set(Request request, String name, Object value);
+
+ // None of special attributes support removal
+ // void remove(Request request, String name);
+ }
+
+ private static final Map<String, SpecialAttributeAdapter> specialAttributes
+ = new HashMap<String, SpecialAttributeAdapter>();
+
+ static {
+ specialAttributes.put(Globals.DISPATCHER_TYPE_ATTR,
+ new SpecialAttributeAdapter() {
+ @Override
+ public Object get(Request request, String name) {
+ return (request.internalDispatcherType == null) ? DispatcherType.REQUEST
+ : request.internalDispatcherType;
+ }
+
+ @Override
+ public void set(Request request, String name, Object value) {
+ request.internalDispatcherType = (DispatcherType) value;
+ }
+ });
+ specialAttributes.put(Globals.DISPATCHER_REQUEST_PATH_ATTR,
+ new SpecialAttributeAdapter() {
+ @Override
+ public Object get(Request request, String name) {
+ return (request.requestDispatcherPath == null) ? request
+ .getRequestPathMB().toString()
+ : request.requestDispatcherPath.toString();
+ }
+
+ @Override
+ public void set(Request request, String name, Object value) {
+ request.requestDispatcherPath = value;
+ }
+ });
+ specialAttributes.put(Globals.ASYNC_SUPPORTED_ATTR,
+ new SpecialAttributeAdapter() {
+ @Override
+ public Object get(Request request, String name) {
+ return request.asyncSupported;
+ }
+
+ @Override
+ public void set(Request request, String name, Object value) {
+ Boolean oldValue = request.asyncSupported;
+ request.asyncSupported = (Boolean)value;
+ request.notifyAttributeAssigned(name, value, oldValue);
+ }
+ });
+ specialAttributes.put(Globals.GSS_CREDENTIAL_ATTR,
+ new SpecialAttributeAdapter() {
+ @Override
+ public Object get(Request request, String name) {
+ if (request.userPrincipal instanceof GenericPrincipal) {
+ return ((GenericPrincipal) request.userPrincipal)
+ .getGssCredential();
+ }
+ return null;
+ }
+
+ @Override
+ public void set(Request request, String name, Object value) {
+ // NO-OP
+ }
+ });
+ specialAttributes.put(Globals.PARAMETER_PARSE_FAILED_ATTR,
+ new SpecialAttributeAdapter() {
+ @Override
+ public Object get(Request request, String name) {
+ if (request.getCoyoteRequest().getParameters()
+ .isParseFailed()) {
+ return Boolean.TRUE;
+ }
+ return null;
+ }
+
+ @Override
+ public void set(Request request, String name, Object value) {
+ // NO-OP
+ }
+ });
+ }
}
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