SimpleJavaEEIntegrationTestServlet.java

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package test.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.security.Principal;

import javax.inject.Inject;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.sql.DataSource;
import javax.transaction.UserTransaction;
import javax.validation.Validator;
import javax.validation.ValidatorFactory;

import test.beans.TestBeanInterface;
import test.beans.artifacts.Preferred;
import test.beans.artifacts.TestDatabase;

@WebServlet(name = "mytest", urlPatterns = { "/myurl" })
public class SimpleJavaEEIntegrationTestServlet extends HttpServlet {
    @Inject @Preferred
    TestBeanInterface tb;

    @Inject @TestDatabase
    DataSource ds;

    // Inject the built-in beans
    @Inject UserTransaction ut;
    @Inject Principal principal;
    @Inject Validator validator;
    @Inject ValidatorFactory vf;

    public void service(HttpServletRequest req, HttpServletResponse res)
            throws IOException, ServletException {

        PrintWriter writer = res.getWriter();
        writer.write("Hello from Servlet 3.0.");
        String msg = "";

        if (ds == null)
            msg += "typesafe Injection of datasource into a servlet failed";

        if (tb == null)
            msg += "Injection of request scoped bean failed";

        if (tb.testDatasourceInjection().trim().length() != 0)
            msg += tb.testDatasourceInjection();

        System.out.println("UserTransaction: " + ut);
        System.out.println("Principal: " + principal);
        System.out.println("Default Validator: " + validator);
        System.out.println("Default ValidatorFactory: " + vf);
        if (ut == null)
            msg += "UserTransaction not available for injection "
                    + "with the default qualifier in Servlet";

        if (principal == null)
            msg += "Caller Principal not available for injection "
                    + "with the default qualifier in Servlet";

        if (validator == null)
            msg += "Default Validator not available for injection "
                    + "with the default qualifier in Servlet";

        if (vf == null)
            msg += "ValidationFactory not available for injection "
                    + "with the default qualifier in Servlet";

        writer.write(msg + "\n");
    }

}