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| author | Sven Eisenhauer <sven@sven-eisenhauer.net> | 2023-11-10 15:11:48 +0100 |
|---|---|---|
| committer | Sven Eisenhauer <sven@sven-eisenhauer.net> | 2023-11-10 15:11:48 +0100 |
| commit | 33613a85afc4b1481367fbe92a17ee59c240250b (patch) | |
| tree | 670b842326116b376b505ec2263878912fca97e2 /Master/Reference Architectures and Patterns/EJB 3.0 Code/Micah Examples/src/examples/stateless/container | |
| download | Studium-master.tar.gz Studium-master.tar.bz2 | |
Diffstat (limited to 'Master/Reference Architectures and Patterns/EJB 3.0 Code/Micah Examples/src/examples/stateless/container')
2 files changed, 138 insertions, 0 deletions
diff --git a/Master/Reference Architectures and Patterns/EJB 3.0 Code/Micah Examples/src/examples/stateless/container/HelloWorldServlet.java b/Master/Reference Architectures and Patterns/EJB 3.0 Code/Micah Examples/src/examples/stateless/container/HelloWorldServlet.java new file mode 100644 index 0000000..61c78a6 --- /dev/null +++ b/Master/Reference Architectures and Patterns/EJB 3.0 Code/Micah Examples/src/examples/stateless/container/HelloWorldServlet.java @@ -0,0 +1,54 @@ +package examples.stateless.container;
+
+import javax.ejb.EJB;
+import javax.naming.InitialContext;
+import javax.naming.NamingException;
+import javax.servlet.http.HttpServlet;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import examples.stateless.interfaces.HelloWorld;
+
+/**
+ * Servlet Class
+ *
+ * @web.servlet name="HelloWorld"
+ * display-name="Name for HelloWorld"
+ * description="Description for HelloWorld"
+ * @web.servlet-mapping url-pattern="/HelloWorld"
+ * @web.servlet-init-param name="A parameter"
+ * value="A value"
+ */
+public class HelloWorldServlet extends HttpServlet {
+ @EJB HelloWorld hwInjected;
+
+ protected void doGet(HttpServletRequest req, HttpServletResponse resp)
+ throws ServletException,
+ IOException {
+
+ doPost(req,resp);
+ }
+
+ protected void doPost(HttpServletRequest req, HttpServletResponse resp)
+ throws ServletException,
+ IOException {
+
+ try {
+ InitialContext ic = new InitialContext();
+ HelloWorld hw = (HelloWorld)ic.lookup(HelloWorld.class.getName());
+
+ PrintWriter pw = resp.getWriter();
+ resp.setContentType("text/html");
+ pw.println("<h4>Lookup output: "+hw.hi()+"</h4>");
+ pw.println("<h4>Injection output: "+hwInjected.hi()+"</h4>");
+ }
+ catch (NamingException e) {
+ e.printStackTrace();
+ }
+ }
+}
diff --git a/Master/Reference Architectures and Patterns/EJB 3.0 Code/Micah Examples/src/examples/stateless/container/PricerClientServlet.java b/Master/Reference Architectures and Patterns/EJB 3.0 Code/Micah Examples/src/examples/stateless/container/PricerClientServlet.java new file mode 100644 index 0000000..09b59d6 --- /dev/null +++ b/Master/Reference Architectures and Patterns/EJB 3.0 Code/Micah Examples/src/examples/stateless/container/PricerClientServlet.java @@ -0,0 +1,84 @@ +package examples.stateless.container;
+
+import javax.ejb.EJB;
+import javax.naming.InitialContext;
+import javax.naming.NameClassPair;
+import javax.naming.NamingEnumeration;
+import javax.naming.NamingException;
+import javax.servlet.http.HttpServlet;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import examples.stateless.interfaces.PricerInjection;
+import examples.stateless.interfaces.PricerLookup;
+
+/**
+ * Servlet Class
+ *
+ * @web.servlet name="PricerClient" display-name="Name for PricerClient"
+ * description="Description for PricerClient"
+ * @web.servlet-mapping url-pattern="/PricerClient"
+ * @web.servlet-init-param name="A parameter" value="A value"
+ */
+public class PricerClientServlet extends HttpServlet {
+ @EJB PricerInjection pi2;
+ @EJB PricerLookup pl2;
+
+
+ protected void doGet(HttpServletRequest req, HttpServletResponse resp)
+ throws ServletException, IOException {
+
+ doPost(req, resp);
+ }
+
+ protected void doPost(HttpServletRequest req, HttpServletResponse resp)
+ throws ServletException, IOException {
+
+ double price = 85.0;
+ String state = "ny";
+
+ PrintWriter pw = resp.getWriter();
+ resp.setContentType("text/html");
+ pw.println("<HTML>\n\t<BODY>");
+
+ try {
+ InitialContext ic = new InitialContext();
+ pw.println("<h3>Here are the JNDI names bound for beans in this example:</h3>");
+ pw.println("<ol>");
+ NamingEnumeration ne = ic.list("");
+ while (ne.hasMore()) {
+ NameClassPair ncp = (NameClassPair) ne.next();
+ pw.println("<li>" + ncp.getName());
+ }
+ pw.println("</ol>");
+
+ // Pricer pricer = (Pricer)ic.lookup(Pricer.class.getName());
+ PricerInjection pi = (PricerInjection)ic.lookup("#"+PricerInjection.class.getName());
+ PricerLookup pl = (PricerLookup)ic.lookup("#"+PricerLookup.class.getName());
+
+ pw.println("Tax (using lookup) on: " + price + " for State: "
+ + state + " is: " + pl.getTaxLookup(price, state) + "<br>");
+
+ pw.println("Tax (using injection) on: " + price + " for State: "
+ + state + " is: " + pi.getTaxInjection(price, state)
+ + "<br>");
+
+ pw.println("Tax (using lookup from @EJB) on: " + price + " for State: "
+ + state + " is: " + pl2.getTaxLookup(price, state) + "<br>");
+
+ pw.println("Tax (using injection @EJB) on: " + price + " for State: "
+ + state + " is: " + pi2.getTaxInjection(price, state)
+ + "<br>");
+ }
+ catch (NamingException e) {
+ e.printStackTrace();
+ }
+
+ pw.println("\t</BODY>\n</HTML>");
+ }
+}
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