Author: kylem
Date: Mon Apr 25 09:00:24 2005
New Revision: 164594
URL: http://svn.apache.org/viewcvs?rev=164594&view=rev
Log:
Added initialization parameter to servlet filter for Controls that makes the
BeanContext class to use for containing web tier controls configurable.
Resolves BEEHIVE-395.
Patch submitted by Brett Bennett.
Modified:
incubator/beehive/trunk/controls/src/runtime/org/apache/beehive/controls/runtime/servlet/ControlFilter.java
Modified:
incubator/beehive/trunk/controls/src/runtime/org/apache/beehive/controls/runtime/servlet/ControlFilter.java
URL:
http://svn.apache.org/viewcvs/incubator/beehive/trunk/controls/src/runtime/org/apache/beehive/controls/runtime/servlet/ControlFilter.java?rev=164594&r1=164593&r2=164594&view=diff
==============================================================================
---
incubator/beehive/trunk/controls/src/runtime/org/apache/beehive/controls/runtime/servlet/ControlFilter.java
(original)
+++
incubator/beehive/trunk/controls/src/runtime/org/apache/beehive/controls/runtime/servlet/ControlFilter.java
Mon Apr 25 09:00:24 2005
@@ -34,22 +34,51 @@
* been set up prior to forwarding the request to the actual target servlet,
and does
* post-processing to ensure that resources have been properly released.
*
- * This filter supports the following initialization parameters:
- *
- * useSession - a boolean value that indicates whether the bean context should
be stored in
- * session. This makes the context (and any contained controls)
accessible
- * across multiple http requests.
- *
* This filter needs to be configured in web.xml for URL mappings that will be
hosting servlets.
*/
public class ControlFilter implements Filter
{
public static String BEAN_CONTEXT_ATTRIBUTE =
ServletBeanContext.class.getName();
+ /*
+ * THIS FILTER RECOGNIZES THE FOLLOWING INITIALIZATION PARAMETERS:
+ */
+
+ /**
+ * The useSession init parameter is a boolean value that indicates whether
the bean context
+ * should be stored in session. This makes the context (and any contained
controls)
+ * accessible across multiple http requests.
+ */
+ public static String INIT_PARAM_USE_SESSION = "useSession";
+
+ /**
+ * The contextClass init parameter is a class name that defines the
BeanContext class to use
+ * for containing Controls in the servlet container. This class <b>must
be</b> a subclass of
+ * the org.apache.beehive.runtime.servlet.ServletBeanContext class.
+ */
+ public static String INIT_PARAM_CONTEXT_CLASS = "contextClass";
+
public void init(FilterConfig filterConfig) throws ServletException
{
_filterConfig = filterConfig;
- _useSessionContext = new
Boolean(filterConfig.getInitParameter("useSession")).booleanValue();
+ _useSessionContext = new
Boolean(filterConfig.getInitParameter(INIT_PARAM_USE_SESSION)).booleanValue();
+ String contextClassName =
filterConfig.getInitParameter(INIT_PARAM_CONTEXT_CLASS);
+ if(contextClassName != null)
+ {
+ try
+ {
+ _contextClass = Class.forName(contextClassName);
+ }
+ catch(Exception e)
+ {
+ throw new ServletException("Cannot load container context
class '"+contextClassName+"'");
+ }
+ if(!ServletBeanContext.class.isAssignableFrom(_contextClass))
+ {
+ throw new ServletException("'"+contextClassName+"' is not a
ServletBeanContext sub-class");
+ }
+
+ }
}
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain)
@@ -77,7 +106,15 @@
//
if (beanContext == null)
{
- beanContext = new ServletBeanContext();
+ try
+ {
+ beanContext =
(ServletBeanContext)_contextClass.newInstance();
+ }
+ catch(Exception e)
+ {
+ throw new ServletException("Cannot construct BeanContext
class instance: " +
+ _contextClass.getName());
+ }
if (httpSession != null)
httpSession.setAttribute(BEAN_CONTEXT_ATTRIBUTE,
beanContext);
}
@@ -122,4 +159,9 @@
* The resolved value of the 'useSession' filter attribute.
*/
private boolean _useSessionContext = false;
+
+ /**
+ * The BeanContext class to use as the container for controls running in
the ServletContainer
+ */
+ private Class _contextClass = ServletBeanContext.class;
}
