Re: facelets & jdbc (homework)

From:
Lew <noone@lewscanon.com>
Newsgroups:
comp.lang.java.help
Date:
Sat, 17 Apr 2010 15:11:49 -0400
Message-ID:
<hqd15k$trq$1@news.albasani.net>
Thufir wrote:

For HW purposes, there can't be any Tomcat configurations :(


What do you mean by "HW purposes"?

So that, while indeed, I can

Context ctx = new InitialContext();
ds = (DataSource) ctx.lookup("java:comp/env/jdbc/mssql");

the exception:

org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot load JDBC
driver class ???com.microsoft.sqlserver.jdbc.SQLServerDriver


Did you try adding the JDBC driver JAR to your WAR?

is a show stopper. It's not possible to do something like:

    ServletConfig config = getServletConfig();
    ServletContext context = getServletContext();
    String uid = config.getInitParameter("UID");


You always risk being wrong when you say, "It's not possible."

I guess I was mixing up the ServletContext with
javax.naming.InitialContext and javax.sql.DataSource.

While I'll put the connection parameters into a properties file, at
least I learned a bit about dbcp and jndi :)


If you're using Faces, you can get at the ServletContext through the FacesContext:

<http://java.sun.com/javaee/6/docs/api/javax/faces/context/FacesContext.html#getCurrentInstance()>
<http://java.sun.com/javaee/6/docs/api/javax/faces/context/FacesContext.html#getExternalContext()>
<http://java.sun.com/javaee/6/docs/api/javax/faces/context/ExternalContext.html#getContext()>

   FacesContext fctx = FacesContext.getCurrentInstance();
   ServletContext sctx = (ServletContext)
     fctx.getExternalContext().getContext();

--
Lew

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