oracle.ord.html
Class OrdPlayMediaServlet

java.lang.Object
javax.servlet.GenericServlet
javax.servlet.http.HttpServlet
oracle.ord.html.OrdPlayMediaServlet

All Implemented Interfaces:

java.io.Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

public class OrdPlayMediaServlet

extends javax.servlet.http.HttpServlet

Interprets the URLs constructed by OrdURLBuilder, retrieves multimedia content from the database, and sends the data to the browser.

OrdPlayMediaServlet supports both Java Servlet and JSP applications. Internally, it uses oracle.ord.im.OrdHttpResponseHandler to deliver binary multimedia content to the browser.

Compared with delivering binary data using ordPlayMedia.jsp, it's safer to use OrdPlayMediaServlet to deliver binary data in various JSP container environments. However, it has more steps to setup in the JSP application. To use ordPlayMedia.jsp in a JSP application, user just needs to drop ordPlayMedia.jsp in the JSP page directory. To use OrdPlayMediaServlet in a JSP application, web.xml should be edited to map this servlet to an URL pattern. Then use the URL pattern as the custom retrieve path for the interMedia BC4J Data Tags. Eventually, the custom retrieve path will be passed into OrdURLBuilder to construct the media fetching URL.

The default release mode for this class is Reserved. Users can change the release mode to Stateful or Stateless through setting up the "releaseMode" init parameter for the servlet.

Note: For discussion on the issues about delivering binary data using a JSP, see notes in OrdHttpJspResponseHandler .

Below is an example on how to use OrdPlayMediaServlet in a JSP applcation:

 Modify web.xml to register OrdPlayMediaServlet.

    <web-app>
       <servlet>
          <servlet-name>myDeliveryComponent</servlet-name>
          <servlet-class>oracle.ord.html.OrdPlayMediaServlet</servlet-class>
          <init-param>
            <param-name>releaseMode</param-name>
            <param-value>Stateless</param-value>
          </init-param> 
       </servlet>
       <servlet-mapping>
          <servlet-name>myDeliveryComponent</servlet-name>
          <url-pattern>/myDeliveryComponent</url-pattern>
       </servlet-mapping>
    </web-app>
 
 Use the servlet in the <jbo:EmbedAudio> tag.

    <jbo:EmbedAudio helperapp="q_player" datasource="ds" mediaattr="Clip"
     whereclause="id=1" retrievepath="myDeliveryComponent" />

 

Since:

JDev5.0

See Also:

OrdPlayMedia, OrdHttpJspResponseHandler, Serialized Form

Constructor Summary

OrdPlayMediaServlet()

Method Summary

void	init(javax.servlet.ServletConfig config)

Methods inherited from class javax.servlet.http.HttpServlet

service

Methods inherited from class javax.servlet.GenericServlet

destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, log, log

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

OrdPlayMediaServlet

public OrdPlayMediaServlet()

Method Detail

init

public void init(javax.servlet.ServletConfig config)
          throws javax.servlet.ServletException

Throws:

javax.servlet.ServletException