3.2. Setting up a new project
Task
Create a Seam project using the seam-gen command line tool.
Prerequisites:
- JDK 6 (see Section 37.1, “Java Development Kit Dependencies” for details)
- JBoss Enterprise Application Platform 5
- Ant 1.7.0
- A recent version of Eclipse.
- A recent version of the JBoss IDE plug-in for Eclipse.
- Add your EAP instance to the JBoss Server View in Eclipse.
- The TestNG plug-in for Eclipse.
- An EAP server running in debug mode.
- A command prompt in the directory where you unzipped the Seam distribution.
Procedure 3.1. Create a Seam project with seam-gen
- Configure seam-gen for your environment by typing the following in your command line interface:
cd seam_distribution_dir; ./seam setup
The following output will be displayed:Buildfile: build.xml init: setup: [echo] Welcome to seam-gen 2.2.2.EAP5 :-) [echo] Answer each question or hit ENTER to accept the default (in brackets) [echo]
You will then receive the following prompts for required information:[input] Enter the directory where you want the project to be created (should not contain spaces) [/home/<username>/projects] [/home/<username>/projects]
Pressing Enter will accept the shown default (/home/<username>/projects).Alternatively you can enter a different value.[input] Enter your JBoss AS home directory [/var/lib/jbossas] [/var/lib/jbossas]
Again, press Enter to accept the default or enter a new value:/home/<username>/path/to/jboss-as
[input] Enter your JBoss AS domain [default] [default]
If you use a custom domain, enter it here.[input] Enter the project name [myproject] [myproject]
Enter the name of your project. Not entering a name will default to naming your projectmyproject
.For this example, the project will be calledhelloworld
.[echo] Accepted project name as: helloworld
[input] Select a RichFaces skin [glassX] (blueSky, classic, darkX, deepMarine, DEFAULT, emeraldTown, [glassX], japanCherry, laguna, ruby, wine)
You can choose a skin for your project from the list presented. You can see thatglassX
is the default.[input] Is this project deployed as an EAR (with EJB components) or a WAR (with no EJB support)? [war] (ear, [war])
Enter the appropriate archive format.EAR
projects support Enterprise JavaBeans 3.0 (EJB3) and require Java EE 5.WAR
projects do not support EJB3, but can be deployed to a J2EE environment, and their packaging is simpler.If you have an EJB3-ready application server like JBoss installed, chooseear
. Otherwise, choosewar
. This tutorial assumes you are using anEAR
deployment, but you can follow these steps even if your project isWAR
-deployed.[input] Enter the base package name for your Java classes [com.mydomain.helloworld] [com.mydomain.helloworld] [input] Enter the Java package name for your session beans [com.mydomain.helloworld.action] [com.mydomain.helloworld.action] [input] Enter the Java package name for your entity beans [com.mydomain.helloworld.model] [com.mydomain.helloworld.model] [input] Enter the Java package name for your test cases [com.mydomain.helloworld.test] [com.mydomain.helloworld.test]
You will be prompted to nominate the package names for your Java classes, session beans, entity beans and test cases.[input] What kind of database are you using? [hsql] ([hsql], mysql, derby, oracle, postgres, mssql, db2, sybase, enterprisedb, h2)
Nominate your database,mysql
, for example. The default ishsql
.[input] Enter the filesystem path to the JDBC driver jar [] []
Enter the path to your system's JDBC driver;/usr/share/java/mysql.jar
for example.You may see the following output:[input] skipping input as property driver.license.jar.new has already been set.
[input] Enter the Hibernate dialect for your database [org.hibernate.dialect.MySQLDialect] [org.hibernate.dialect.MySQLDialect]
Nominate the appropriate Hibernate dialect.[input] Enter the JDBC DataSource class for your database [com.mysql.jdbc.jdbc2.optional.MysqlDataSource] [com.mysql.jdbc.jdbc2.optional.MysqlDataSource] [input] Enter the JDBC driver class for your database [com.mysql.jdbc.Driver] [com.mysql.jdbc.Driver]
You will be prompted to nominate the JDBC classes for your instance.[input] Enter the JDBC URL for your database [jdbc:mysql:///test] [jdbc:mysql:///test]
The default URL will differ based on your response to the earlier database question.[input] Enter the database username [sa] [sa]
Nominate the username for access to the database, for exampleroot
.[input] Enter the database password [] []
Set the password for the above username.You may see the following message:[input] skipping input as property hibernate.default_schema.entered has already been set.
[input] Enter the database schema name (Enter '-' to clear previous value) [] [] [input] Enter the database catalog name (Enter '-' to clear previous value) [] []
Name the database schema and catalogue as prompted.[input] Are you working with tables that already exist in the database? [n] (y, [n])
If you are working with an existing data model, make sure to tell seam-gen that tables already exist in the database.[input] Do you want to recreate the database tables and execute import.sql each time you deploy? [n] (y, [n])
Again, answer as appropriate.- You will see the following output. Some details will differ in your instance, based on answers you provided to the above questions:
[propertyfile] Creating new property file: /home/path/to/jboss-as/seam/seam-gen/build.properties [echo] Installing JDBC driver jar to JBoss AS [copy] Copying 1 file to /home/path/to/jboss-as/server/default/lib init: init-properties: [echo] /home/path/to/jboss-as/ validate-workspace: validate-project: settings: [echo] JBoss AS home: /home/path/to/jboss-as/ [echo] Project name: helloworld [echo] Project location: /home/path/to/projects/helloworld [echo] Project type: ear [echo] Action package: com.mydomain.helloworld.action [echo] Model package: com.mydomain.helloworld.model [echo] Test package: com.mydomain.helloworld.test [echo] JDBC driver class: com.mysql.jdbc.Driver [echo] JDBC DataSource class: com.mysql.jdbc.jdbc2.optional.MysqlDataSource [echo] Hibernate dialect: org.hibernate.dialect.MySQLDialect [echo] JDBC URL: jdbc:mysql:///test [echo] Database username: root [echo] Database password: [echo] [echo] Type './seam create-project' to create the new project BUILD SUCCESSFUL Total time: 2 minutes 14 seconds
The time shown in this example is non-indicative of the actual time it will take to complete this task.
- Create a new project in our Eclipse workspace directory by entering one of the following commands:
./seam create-project
Or./seam new-project
You will see the following output:Buildfile: build.xml ... new-project: [echo] A new Seam project named 'helloworld' was created in the C:\Projects directory [echo] Type 'seam explode' and go to http://localhost:8080/helloworld [echo] Eclipse Users: Add the project into Eclipse using File > New > Project and select General > Project (not Java Project) [echo] NetBeans Users: Open the project in NetBeans BUILD SUCCESSFUL Total time: 7 seconds C:\Projects\jboss-seam>
This copies the SeamJAR
s, dependentJAR
s and the JDBC driverJAR
to a new Eclipse project. It generates all required resources and configuration files, a Facelets template file and stylesheet, along with Eclipse metadata and an Ant build script. The Eclipse project will be automatically deployed to an exploded directory structure in JBoss as soon as you add the project. To add the project, go to New → Project... → General → Project → Next, type the Project name (in this case,helloworld
), and then clickFinish
. Do not selectJava Project
from the New Project wizard.
If your default JDK in Eclipse is not Java SE 6 JDK, you will need to select a compliant JDK. Go to Project → Properties → Java Compiler.
Alternatively, you can deploy the project from outside Eclipse by typing
seam explode
.
The welcome page can be found at
http://localhost:8080/helloworld
. This is a Facelets page (view/home.xhtml
) created using the template found at view/layout/template.xhtml
. You can edit the welcome page or the template in Eclipse, and see the results immediately by refreshing your browser.
XML configuration documents will be generated in the project directory. These may appear complicated, but they are comprised primarily of standard Java EE, and require little alteration, even between Seam projects.
There are three database and persistence configurations in the generated project.
persistence-test.xml
and import-test.sql
are used while running TestNG unit tests against HSQLDB. The database schema and test data in import-test.sql
is always exported to the database before tests are run. myproject-dev-ds.xml
, persistence-dev.xml
and import-dev.sql
are used during application deployment to your development database. If you told seam-gen that you were working with an existing database, the schema may be exported automatically upon deployment. myproject-prod-ds.xml
, persistence-prod.xml
and import-prod.sql
are used during application deployment to your production database. The schema will not be exported automatically upon deployment.