I want to use graphicImageDynamic for dynamic images in an application using
Seam. For testing it, I tried to implement the sandbox GraphicImageDynamicText
example using Seam and Facelets. This component uses imageRendererClass param
which must point to ?reference or a fully qualified class name which implements
org.apache.myfaces.custom.graphicimagedynamic.ImageRenderer?.
I have compiled myfaces svn version (1.1.2) from 29.03.06. All myfaces .jars
are placed to
?/jboss/server/default/deploy/jbossweb-tomcat55.sar/jsf-libs/. JBoss version is
4.0.4RC1.
I have Login, LoggedIn and LoggedInInterceptor components from the old beta1
booking example.
I have GraphicImageDynamicComponentHandler and sandbox.taglib.xml from
facelets wiki. Facelets version is 1.1.5.
The Seam version is CVS20060416.
Also I have:
Test.java:
| package test.seam;
|
| import java.io.IOException;
|
| import javax.ejb.Local;
| import javax.faces.context.FacesContext;
| import javax.faces.context.ResponseStream;
|
| import org.apache.myfaces.custom.dynamicResources.ResourceContext;
|
| @Local
| public interface Test {
|
| public void setContext(FacesContext facesContext, ResourceContext
resourceContext) throws IOException;
| public String getText();
|
| public void setText(String text);
| public Class getImageRenderer();
| public String getContentType();
| public int getContentLength();
| public void renderResource(ResponseStream out) throws IOException;
| }
|
TestAction.java:
| Imports
| <?>
|
| @Stateless
| @Name("test")
| @Interceptors(SeamInterceptor.class)
| @Intercept(InterceptionType.ALWAYS)
| @Scope(ScopeType.SESSION)
| @LoggedIn
| public class TestAction implements Test, ImageRenderer, Serializable {
|
| private static final long serialVersionUID = 500L;
|
| private static final Logger log = Logger.getLogger(Test.class);
| private String _text;
|
|
| private byte[] bytes = null;
|
| public String getText() {
| return _text;
| }
|
| public void setText(String text) {
| this._text = text;
| }
|
| @In
| private User user;
|
| public void setContext(FacesContext facesContext, ResourceContext
resourceContext) throws IOException {
| ImageContext imageContext = (ImageContext) resourceContext;
| //Object text = imageContext.getParamters().get("text");
| Object text = (user== null ? "user=null" : user.getName());
| if (text == null) {
| text = "_null_";
| }
| int width = 300;
| int height = 30;
| Integer widthObj = imageContext.getWidth();
| if (widthObj != null) {
| width = widthObj.intValue();
| }
| Integer heightObj = imageContext.getHeight();
| if (heightObj != null) {
| height = heightObj.intValue();
| }
| BufferedImage img = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB);
| Graphics graphics = img.getGraphics();
| try {
| graphics.setColor(Color.WHITE);
| graphics.fillRect(0, 0, width, height);
| graphics.setColor(Color.BLUE);
| graphics.drawString(text.toString(), 10, 20);
|
| ByteArrayOutputStream baout = new ByteArrayOutputStream();
| JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(baout);
| encoder.encode(img);
| baout.flush();
| bytes = baout.toByteArray();
| }
| finally {
| graphics.dispose();
| }
| }
|
| public Class getImageRenderer() {
| return this.getClass();
| }
|
| public String getContentType() {
| return "image/jpeg";
| }
|
| public int getContentLength() {
| return -1;
| }
|
| public void renderResource(ResponseStream out) throws IOException {
| out.write( bytes );
| }
|
| }
|
web.xml:
| <context-param>
| <param-name>javax.faces.DEFAULT_SUFFIX</param-name>
| <param-value>.xhtml</param-value>
| </context-param>
| <context-param>
| <param-name>facelets.DEVELOPMENT</param-name>
| <param-value>true</param-value>
| </context-param>
| <context-param>
| <param-name>facelets.LIBRARIES</param-name>
|
<param-value>/WEB-INF/tomahawk.taglib.xml;/WEB-INF/sandbox.taglib.xml</param-value>
| </context-param>
| <context-param>
| <param-name>javax.faces.STATE_SAVING_METHOD</param-name>
| <param-value>client</param-value>
| </context-param>
| <context-param>
| <param-name>org.apache.myfaces.ALLOW_JAVASCRIPT</param-name>
| <param-value>true</param-value>
| </context-param>
| <context-param>
| <param-name>org.apache.myfaces.DETECT_JAVASCRIPT</param-name>
| <param-value>false</param-value>
| </context-param>
| <context-param>
| <param-name>org.apache.myfaces.PRETTY_HTML</param-name>
| <param-value>true</param-value>
| </context-param>
| <context-param>
| <param-name>org.apache.myfaces.AUTO_SCROLL</param-name>
| <param-value>true</param-value>
| </context-param>
| <context-param>
| <param-name>org.jboss.seam.core.init.jndiPattern</param-name>
| <param-value>test/#{ejbName}/local</param-value>
| </context-param>
|
| <filter>
| <filter-name>extensionsFilter</filter-name>
|
<filter-class>org.apache.myfaces.webapp.filter.ExtensionsFilter</filter-class>
| </filter>
|
| <filter>
| <filter-name>SeamRedirectFilter</filter-name>
| <filter-class>org.jboss.seam.servlet.SeamRedirectFilter</filter-class>
| </filter>
|
| <filter>
| <filter-name>SeamServletFilter</filter-name>
| <filter-class>org.jboss.seam.servlet.SeamServletFilter</filter-class>
| </filter>
|
| <filter-mapping>
| <filter-name>extensionsFilter</filter-name>
| <url-pattern>*.jsf</url-pattern>
| </filter-mapping>
|
| <filter-mapping>
| <filter-name>extensionsFilter</filter-name>
| <url-pattern>/faces/*</url-pattern>
| </filter-mapping>
|
| <filter-mapping>
| <filter-name>SeamRedirectFilter</filter-name>
| <url-pattern>*.jsf</url-pattern>
| </filter-mapping>
|
| <filter-mapping>
| <filter-name>SeamServletFilter</filter-name>
| <url-pattern>/faces/*</url-pattern>
| </filter-mapping>
|
| <listener>
| <listener-class>org.jboss.seam.servlet.SeamListener</listener-class>
| </listener>
| <listener>
|
<listener-class>org.apache.myfaces.webapp.StartupServletContextListener</listener-class>
| </listener>
|
| <servlet>
| <servlet-name>Faces Servlet</servlet-name>
| <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
| <load-on-startup>1</load-on-startup>
| </servlet>
| <servlet-mapping>
| <servlet-name>Faces Servlet</servlet-name>
| <url-pattern>*.jsf</url-pattern>
| </servlet-mapping>
| </web-app>
|
faces-config.xml:
| <faces-config>
| <navigation-rule>
| <navigation-case>
| <from-outcome>test</from-outcome>
| <to-view-id>/test.xhtml</to-view-id>
| <redirect />
| </navigation-case>
| </navigation-rule>
|
| <application>
| <view-handler>com.sun.facelets.FaceletViewHandler</view-handler>
| </application>
| <lifecycle>
| <phase-listener>org.jboss.seam.jsf.SeamPhaseListener</phase-listener>
| </lifecycle>
| </faces-config>
|
Test.xhml:
| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";>
| <html xmlns="http://www.w3.org/1999/xhtml";
| xmlns:ui="http://java.sun.com/jsf/facelets";
| xmlns:h="http://java.sun.com/jsf/html";
| xmlns:f="http://java.sun.com/jsf/core";
| xmlns:t="http://myfaces.apache.org/tomahawk";
| xmlns:s="http://myfaces.apache.org/sandbox";>
| <head>
| <meta HTTP-EQUIV="Content-Type" CONTENT="text/html;charset=UTF-8" />
| </head>
| <body>
| <h:form enctype="multipart/form-data">
|
| <br/>
| <h:inputText maxlength="20" value="#{test.text}"/>
| <br/>
| <s:graphicImageDynamic id="imageDisplay3" width="300" height="22"
| imageRendererClass="#{test.imageRenderer}">
| <f:param name="text" value="#{test.text}" />
| </s:graphicImageDynamic>
|
| <br/>
| <t:messages showDetail="true"/>
| <h:commandButton value="Update"/>
| </h:form>
| </body>
| </html>
|
When I use ?Object text = imageContext.getParamters().get("text");? the text is
rendered properly.
When I try to render User name, it is null, but in debug.xhml (taken from the
examples), I see the User component in the session context. The same thing
happens when I try to use [EMAIL PROTECTED] private Context sessionContext;?.
Why the injection components are null?
Is it possible to use graphicImageDynamic and Seam? And if not, in what way can
I use SeamServletFilter in pure servlet to interacts with Seam component?
Unfortunately, there are no examples of using SeamServletFilter.
Thanks.
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http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3937615#3937615
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http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3937615
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