© 2006 IBM Corporation Made available under the EPL v1.0 2006 WebSphere Services Technical Conference world class skill building and technical enablement. - презентация

1 © 2006 IBM Corporation Made available under the EPL v WebSphere Services Technical Conference world class skill building and technical enablement May 1-5, 2006 Las Vegas, NV Eclipse Web Tools Session Number: D14 Arthur Ryman, Chuck Brigham,

2 D WebSphere Services Technical Conference © 2006 IBM Corporation 2 Objectives You will learn about the structure of the Eclipse Web Tools Platform (WTP) project You will be given an overview the WTP release roadmap You will be shown a Quick Tour demonstration that touches on many of the key functional components of WTP After this session you will be able to use WTP and attend further sessions that go into more detail about J2EE and Web services tools Java and all Java-based trademarks are trademarks of Sun Microsystems, Inc. in the United States, other countries, or both. Other company, product, or service names may be trademarks or service marks of others.

3 D WebSphere Services Technical Conference © 2006 IBM Corporation 3 Abstract The Web Tools Platform (WTP) Project extends Eclipse with tools for developing Java Web Applications. The Web Standard Tools subproject contains tools for HTML, CSS, JavaScript, XML, Web Services and Data access. The J2EE Standard Tools subproject contains tools for servlets, JSP, JSF, EJB, and Java Web Services. The WTP project was initiated by IBM and seeded with core components of Rational Application Developer (RAD) V6. WTP will be the basis for the next major release of RAD. This session gives and overview of the project, explains its structure and goals, and demonstrates the tools.

4 D WebSphere Services Technical Conference © 2006 IBM Corporation 4 Outline Project Overview Release Roadmap New in WTP 1.0 New in WTP 1.5 Beyond Callisto Quick Tour Demo Dynamic Web Projects JSPs and Servlet Database Access Web Services

5 D WebSphere Services Technical Conference © 2006 IBM Corporation 5 Project Overview WTP provides tools for Java Web application development Tools for application developers Platform for tool developers Subprojects focus on open standards Web Standard Tools – IETF, W3C, OASIS, WS-I, ANSI, etc J2EE Standard Tools – JCP IBM contributed core components of Rational Application Developer V6.0 and remains the largest contributor BEA, Oracle, Sybase and many others participate in WTP development IBM will adopt WTP 1.5 in Rational Application Developer V7.0

6 D WebSphere Services Technical Conference © 2006 IBM Corporation 6 IETF W3C OASIS WS-I ECMA ANSI De Jure Standards De Facto Standards Web Technologies Java Technologies WST HTML, XML, XSLT, CSS, JS, WSDL, SOAP, UDDI JST Servlet, JSP, EJB, JAX-RPC, JDBC, JAXP, JSF, J2EE XUL PHP Struts Hibernate Spring JDO WTP Subprojects and Open Standards SQL JCP Apache ObjectWeb SourceForge Mozilla Zend

7 D WebSphere Services Technical Conference © 2006 IBM Corporation 7 Web Standard Tools (WST) Web Projects Web server control Structured Source Editing Framework HTML, JavaScript, CSS XML, DTD, XSD Web services (WSDL, WS-I) SQL, relational database access

8 D WebSphere Services Technical Conference © 2006 IBM Corporation 8 J2EE Standard Tools (JST) J2EE Projects J2EE server control Servlets JSP EJB Java Web services (JAX-RPC)

9 D WebSphere Services Technical Conference © 2006 IBM Corporation 9 Release Roadmap WTP 0.7, July 2005 – Tools for Application Developers September, 2005 WTP 1.0, December 2005 – Platform for Tool Developers February, April, TDB WTP 1.5, June 2006 – Callisto Simultaneous Release TBD TBD WTP 2.0, June 2007 – Web 2.0, Java EE 5

10 D WebSphere Services Technical Conference © 2006 IBM Corporation 10 New in WTP 1.0 First wave of Platform APIs Component descriptors/scanners Initial Feature definitions Project Facets External server adapters and runtimes installed via Update Manager More supported servers Adopter Hot List Improved Help Improved Scalability Lots of other bug fixes and enhancements!

11 D WebSphere Services Technical Conference © 2006 IBM Corporation 11 New in WTP 1.5 (Callisto) Initial steps towards Java EE 5 JSF Tools Incubator Dali EJB 3.0 Persistence Tools Glassfish server adapter hosted at java.net Components moved to Eclipse Platform: Common Navigator (Project Explorer) Tabbed Property View More Platform APIs Adopter Usage/Breakage Scans XML based Help – DITA Lots of other bug fixes and enhancements!

12 D WebSphere Services Technical Conference © 2006 IBM Corporation 12 JSF Tools Incubator Project Led by Oracle with contributions from Sybase and IBM JSF-JSP page source editor application configuration (faces-config.xml) source/graphical editor JSF library registry

13 D WebSphere Services Technical Conference © 2006 IBM Corporation 13 Dali EJB ORM Incubator Project Support for development of Java Persistence API (JPA) persistent Entities within Eclipse Leverage and integrate into existing Eclipse platform and projects, esp. WTP, DTP

14 D WebSphere Services Technical Conference © 2006 IBM Corporation 14 Design Time Mapping Validation ADDRESS IDCITYCOUNTRY P_CODE Default mapping wont work!

15 D WebSphere Services Technical Conference © 2006 IBM Corporation 15 WTP Beyond Callisto DTP Adoption Remove Data Tools Java EE 5 support Update J2EE models and API Graduation of JSF and Dali projects AJAX Tools Framework Incubator Improved JavaScript editor and new debugger Collaboration with PHP Tools Project Improved Apache Web server support Collaboration with SOA Tools Project Improved WS-* support Continued definition of Platform APIs and Features Focus on adopters

16 © 2006 IBM Corporation Made available under the EPL v WebSphere Services Technical Conference world class skill building and technical enablement May 1-5, 2006 Las Vegas, NV Quick Tour of Eclipse WTP

17 D WebSphere Services Technical Conference © 2006 IBM Corporation 17 WTP Quick Tour Iterations 1. Configure an application server, create a Web application, develop a simple JavaServer TM Pages (JSP) document that prints a greeting, and run it on the server. 2. Add a login JSP, write Java scriptlets to display the user name, create a Java servlet that controls the application page flow, and debug the servlet and JSPs. 3. Create a database to store user information, develop an SQL query to access it, and add Java Database Connectivity (JDBC) calls to your servlet to invoke the query and retrieve the user information. 4. Deploy the database query as a Web service, generate a JSP test client that invokes the Web service, and monitor the Simple Object Access Protocol (SOAP) message traffic. For the most benefit, download a recent WTP release and follow along!

18 D WebSphere Services Technical Conference © 2006 IBM Corporation 18 Iteration 1: J2EE Web Applications In iteration 1 we will configure our development environment, and create a dynamic Web application Tasks: Configure an application server Create a Dynamic Web application project Develop a simple JavaServer Pages (JSP) document that prints a greeting Run the JSP on the server

19 D WebSphere Services Technical Conference © 2006 IBM Corporation 19 Configure an Application Server 1. Window > Preference > Server preferences > Installed Runtimes 2. Click Add. Specify the location of Tomcat. You must specify a JDK so your JSPs will compile. An application server is needed to run our Java Web application

20 D WebSphere Services Technical Conference © 2006 IBM Corporation 20 Create a Web Application Project 1. Select File > New > Project … > Web > Dynamic Web Project wizard. 2. Name the project Project1. 3. Associate Tomcat with Project1. 4. Click Finish. The project will contain all of our Web artifacts such as JSPs, servlets

21 D WebSphere Services Technical Conference © 2006 IBM Corporation 21 Develop a Simple JSP that Prints a Greeting 1. Right click on Project1s WebContent folder and select New->JSP. 2. Name the JSP hello-world.jsp. 3. Click Next. Select JSP with html markup. 4. Click Finish. 5. Change the title and add body contents for Hello, world. The JSP will display Hello, World in a clients Web browser

22 D WebSphere Services Technical Conference © 2006 IBM Corporation 22 hello-world.jsp

23 D WebSphere Services Technical Conference © 2006 IBM Corporation 23 Run the JSP on the Server 1. Right click on hello-world.jsp and select Run As > Run on Server. 2. Tomcat starts up and displays the JSP. To make use of the JSP it must be run on a server, in our case Tomcat

24 D WebSphere Services Technical Conference © 2006 IBM Corporation 24 Iteration 1 Summary We configured Tomcat to act as our application server We created a Web application project We developed a simple JSP that prints Hello, world in a browser We ran the JSP on the Tomcat server

25 D WebSphere Services Technical Conference © 2006 IBM Corporation 25 Iteration 2: Servlets and Scriptlets In iteration 1 we created a JSP that had static content In iteration 2 we will add dynamic content Tasks: Add a Java Scriptlet to a JSP Debug a JSP Create a Servlet Debug a Servlet

26 D WebSphere Services Technical Conference © 2006 IBM Corporation 26 Add a Java Scriptlet to a JSP 1. Add the following scriptlet to the JSPs body: Welcome to WTP, ! 2. Select Run As->Run on Server 3. Provide the name by appending ?user=EclipseCon Scriptlets allow us to add Java code to a JSP that will get executed on the server

27 D WebSphere Services Technical Conference © 2006 IBM Corporation 27 hello-world.jsp?user=EclipseCon

28 D WebSphere Services Technical Conference © 2006 IBM Corporation 28 Debug a JSP 1. Set a break point on the line String user = request.getParameter("user"); by double clicking in the margin. 2. Right click on hello-world.jsp and select Debug As > Debug on Server. Tomcat will now restart in debug mode. 3. Select to resume execution. 4. Change the user to Alice. Notice the variables view shows the changed value. Debugging a JSP allows us to step through the JSPs execution path Debug on Server. Tomcat will now restart in debug mode. 3. Select to resume execution. 4. Change the user to Alice. Notice the variables view shows the changed value. Debugging a JSP allows us to step through the JSPs execution path">

29 D WebSphere Services Technical Conference © 2006 IBM Corporation 29 Debug hello-world.jsp

30 D WebSphere Services Technical Conference © 2006 IBM Corporation 30 Create a Servlet JSPs should only contain presentation logic. Application logic should be performed by servlets. We will now add a login JSP and a servlet to handle the login request.

31 D WebSphere Services Technical Conference © 2006 IBM Corporation 31 Create a Login JSP 1. Create login-user.jsp the same way we created hello-world.jsp. 2. Add the following content to the JSP: The login JSP will submit information to a servlet using a form Login User Login User Enter your user name:

32 D WebSphere Services Technical Conference © 2006 IBM Corporation 32 Create a Servlet 1. Right click on Project1 and select New->Servlet. 2. Specify the package name org.eclipsecon and the name HelloServlet. 3. Click Next. Accept the default name and mapping. 4. Click Finish. The wizard creates the Servlet skeleton. The servlet will take the input from our JSP, perform some logic, and return either the login JSP or the hello world JSP

33 D WebSphere Services Technical Conference © 2006 IBM Corporation 33 Add Logic to the Servlet 1. Add the following implementation to the doGet method: Because we specified GET in login-user.jsp we will implement doGet() protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String url; String user = request.getParameter("user"); if (user == null || user.length() == 0) { url = "/login-user.jsp"; request.setAttribute("error", "User name must not be empty."); } else { url = "/hello-world.jsp"; } ServletContext context = getServletContext(); RequestDispatcher dispatcher = context.getRequestDispatcher(url); dispatcher.forward(request, response); }

34 D WebSphere Services Technical Conference © 2006 IBM Corporation 34 Run the Updated Application Right click on login-user.jsp and select Run As->Run on Server

35 D WebSphere Services Technical Conference © 2006 IBM Corporation 35 Debug a Servlet 1. Set a breakpoint in HelloServlet on the line String user = request.getParameter("user"); by double clicking in the margin. 2. Right click on HelloServlet.java and select Debug As->Debug on Server. 3. Select to resume execution. 4. Try changing the name and watch the execution path. Debugging a servlet is very similar to debugging a Java class Debug on Server. 3. Select to resume execution. 4. Try changing the name and watch the execution path. Debugging a servlet is very similar to debugging a Java class">

36 D WebSphere Services Technical Conference © 2006 IBM Corporation 36 Iteration 2 Summary We made our JSP dynamic by adding a Java Scriptlet We debugged our JSP on the server We created a login JSP and a servlet to handle login requests We debugged the servlet on the server

37 D WebSphere Services Technical Conference © 2006 IBM Corporation 37 Iteration 3: Database Access In iteration 2 we created a dynamic Web application In iteration 3 we will add a data layer to our Web application Tasks: Connect to a Database Execute SQL Statements Add Database Access to our Web Application

38 D WebSphere Services Technical Conference © 2006 IBM Corporation 38 Show the Database Views 1. Click on Window > Show View > Other… 2. Select the Database Explorer and Data Output views and click OK. WTP provides two views that assist in working with databases. We need to show these views before proceeding.

39 D WebSphere Services Technical Conference © 2006 IBM Corporation 39 Connect to a Database 1. Right click in the Database Explorer and select New Connection… 2. Select Derby Enter a convenient location for the database such as C:\Project1db 4. Enter the location of derby.jar. Its located in the plugins dir in org.apache.derby.core. 5. Click Test Connection. 6. If the connection test was successful, click Finish. Before working with a database we must first connect to it.

40 D WebSphere Services Technical Conference © 2006 IBM Corporation 40 Execute SQL Statements 1. Open the SQL Scrapbook by clicking the button in the Database Explorer, selecting the Project1db, and enter a name of project1sql.sqlpage. 2. Enter the following statements into the editor. (You can replace a name with your own. 3. Select each statement individually, right click on it and select Run SQL. 4. Results are shown in the Data Output view. We will now populate our database by executing SQL statements. CREATE TABLE WEB1. LOGIN (USERID CHAR(8) NOT NULL, FULLNAME CHAR(20), PRIMARY KEY(USERID)) INSERT INTO WEB1. LOGIN (USERID, FULLNAME) VALUES ('dai','Naci Dai') INSERT INTO WEB1. LOGIN (USERID, FULLNAME) VALUES ('mandel','Lawrence Mandel') INSERT INTO WEB1. LOGIN (USERID, FULLNAME) VALUES ('ryman','Arthur Ryman') SELECT * FROM WEB1. LOGIN ORDER BY FULLNAME SELECT FULLNAME FROM WEB1. LOGIN WHERE USERID = 'ryman'

41 D WebSphere Services Technical Conference © 2006 IBM Corporation 41 Disconnect from the Database Derby only supports a connection to a given database from one process – we need to disconnect before using the database in our Web application 1. Right click on the Project1db in the Database Explorer and select Disconnect.

42 D WebSphere Services Technical Conference © 2006 IBM Corporation 42 Add Database Access to our Web Application We will now update our Web application to retrieve user names from the database we created There are 4 tasks to perform: 1. Add the Derby library to our Web application 2. Create a class that will access the database 3. Update our Servlet to access the user name from the database class 4. Update our hello world JSP to display the user name

43 D WebSphere Services Technical Conference © 2006 IBM Corporation 43 Add the Derby Library to our Web Application 1. Copy derby.jar to WEB-INF/lib note: While this method works fine for a single application, if multiple applications need access to a Derby database a shared copy of Derby must be used. Our application needs access to the Derby libraries in order to access a Derby database

44 D WebSphere Services Technical Conference © 2006 IBM Corporation 44 Create a Class that will Access the Database 1. Create a new class named Database.java in the same package as HelloServlet.java. The class will contain all the logic to access the database public class Database { public String lookupFullname(String userid) throws SQLException { Connection connection = null; PreparedStatement statement = null; ResultSet resultset = null; String fullname = ""; try { Class.forName("org.apache.derby.jdbc.EmbeddedDriver"); connection = DriverManager.getConnection("jdbc:derby:C:\\{Project1db"); String QUERY = "SELECT FULLNAME FROM WEB1. LOGIN WHERE USERID = ?; statement = connection.prepareStatement(QUERY); statement.setString(1, userid); resultset = statement.executeQuery(); if (resultset.next()) fullname = resultset.getString("FULLNAME").trim(); } catch (Exception e) { e.printStackTrace(); } finally { if (resultset != null) resultset.close(); if (statement != null) statement.close(); if (connection != null) connection.close(); } return fullname; } }

45 D WebSphere Services Technical Conference © 2006 IBM Corporation 45 Update Our Servlet to use the Database class 1. Update the doGet method of HelloServlet.java to use Database.java. The Servlet will now access the user name from the database protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String url = "/hello-world.jsp"; String user = request.getParameter("user"); if (user == null || user.length() == 0) { url = "/login-user.jsp"; request.setAttribute("error", "User name must not be empty."); } else { try { String fullname = new Database().lookupFullname(user); request.setAttribute("fullname", fullname); } catch (SQLException e) { e.printStackTrace(); } } ServletContext context = getServletContext(); RequestDispatcher dispatcher = context.getRequestDispatcher(url); dispatcher.forward(request, response); }

46 D WebSphere Services Technical Conference © 2006 IBM Corporation 46 Update JSP to Display the User Name 1. Update the hello-world.jsp to retrieve the value of the fullname parameter and use it instead of the user parameter if it has been specified by changing the Scriptlet as follows: The JSP needs to be updated to use fullname.

47 D WebSphere Services Technical Conference © 2006 IBM Corporation 47 Run the Updated Web Application 1. Run login-user.jsp on the server. 2. Try entering a user id. The resulting page now displays the name instead of the user id.

48 D WebSphere Services Technical Conference © 2006 IBM Corporation 48 Iteration 3 Summary We connected to a Derby database We executed SQL statements to populate the database and view the values we added We added database access to our Web application enabling the application to display the user name instead of the user id.

49 D WebSphere Services Technical Conference © 2006 IBM Corporation 49 Iteration 4: Web Services In iteration 3 we created a data layer for our Web application In iteration 4 we will expose that data through a Web service Tasks: Deploy a Web service Test a Web service with a test client Monitor SOAP messages

50 D WebSphere Services Technical Conference © 2006 IBM Corporation 50 Deploy a Web Service 1. Right click on Database.java and select Web Services > Create Web service. 2. Check the following items: Start Web service in Web project Generate a Proxy Test the Web service Monitor the Web service 3. Click Finish. We will create a Web service using the bottom-up approach to expose our Database.java class.

51 D WebSphere Services Technical Conference © 2006 IBM Corporation 51 Test a Web Service with a Test Client 1. Click on the lookupFullname method. 2. Enter the name ryman. 3. Click Invoke. 4. The Result pane displays the full name Arthur Ryman associated with the user id ryman. The test client allows you to easily test a Web service. The test client was created by selecting the option in the WS wizard

52 D WebSphere Services Technical Conference © 2006 IBM Corporation 52 Monitor SOAP Messages 1. The message you sent when testing the Web service can be seen by opening the TCP/IP monitor view. If not already open select Window > Show View > Other… > Debug > TCP/IP Monitor 2. Use the test client to test another name. The result shows up in the TCP/IP monitor. Web services send SOAP messages between the client and server We can monitor these messages to see the traffic and find problems

53 D WebSphere Services Technical Conference © 2006 IBM Corporation 53 Iteration 4 Summary We deployed a Web service that allows programmatic access to our database We tested the Web service with a test client generated by the Web service wizard We monitored SOAP messages sent to and from the Web service

54 D WebSphere Services Technical Conference © 2006 IBM Corporation 54 Summary WTP contains many tools that simplify the development of Web applications including working with databases and working with Web services Technologies supported by WTP include: CSS, DTD, EAR, EJB, HTML, XHTML, J2EE, JavaBeans TM, JavaScript TM, JSP, Servlet, SQL, WSDL, XML, XML Schema, WAR, Web services WTP is the base for WebSphere Application Server Toolkit (AST), Rational Application Developer (RAD), and more!

55 2006 WebSphere Services Technical Conference © 2006 IBM Corporation 55 Questions Please complete your session evaluation Thank you