jboss_7_cookbook
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jboss_7_cookbook [2013/12/23 13:09] hkoller [Deployments] |
jboss_7_cookbook [2013/12/23 13:09] (current) hkoller [Deployments] |
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| + | ===== Deployments ===== | ||
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| + | [[JBoss EJB | EJB]] | ||
| + | ==== Modules ==== | ||
| + | |||
| + | ==== Webservices ==== | ||
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| + | |||
| + | ===== Dependency Injection ===== | ||
| + | JBoss uses [[Java CDI]] | ||
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| + | |||
| + | ===== Resource Initialisation ===== | ||
| + | Sometimes Resources should be intitialized as soon as an application is deployed in the container. This may not be as straightforward as one would hope, because JBoss does a lot of lazy initialising. This section shows a few options | ||
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| + | ==== Bootstrap Servlet ==== | ||
| + | Create a servlet which gets loaded at startup. Do resource initialization in there. This can also be used to initialize @ApplicationScoped CDI Singletons: | ||
| + | |||
| + | <code java> | ||
| + | @WebServlet(loadOnStartup = 1) | ||
| + | public class BootstrapServlet extends HttpServlet { | ||
| + | @Inject | ||
| + | MyExpensiveSingletonResource cdiResource; // cdiResource gets initialized here | ||
| + | |||
| + | @Override | ||
| + | public void init() { | ||
| + | // do additional resource initialization here | ||
| + | } | ||
| + | |||
| + | @Override | ||
| + | public void destroy() { | ||
| + | // SHOULD be called when the app shuts down (but better don't count on it) | ||
| + | } | ||
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| + | |||
| + | } | ||
| + | </code> | ||
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| + | |||
| + | ===== Database Connectivity ===== | ||
| + | ==== Configure a Datasource ==== | ||
| + | * Copy the **JDBC4** driver to ..../jboss/standalone/deployments | ||
| + | * JBoss automatically deploys JDBC4 drivers | ||
| + | * for older JDBC drivers look [[https://docs.jboss.org/author/display/AS7/Admin+Guide?_sscc=t#AdminGuide-JDBCDriverInstallation | here ]] | ||
| + | * Configure the Datasource from the JBoss Web Console or by editing standalone.xml | ||
| + | |||
| + | === Option1: Configure Datasource from JBoss Web Console === | ||
| + | * go to http://localhost:8080/console | ||
| + | * click "Profile" in the upper right corner | ||
| + | * click "Connector --> Datasources" on the left side | ||
| + | * click "Add" and define connection | ||
| + | * dont forget to enable the connection | ||
| + | |||
| + | === Option2: Configure Datasource in standalone.xml === | ||
| + | edit ..../jboss/standalone/configuration/standalone.xml | ||
| + | |||
| + | <code xml> | ||
| + | <subsystem xmlns="urn:jboss:domain:datasources:1.0"> | ||
| + | <datasource jta="false" jndi-name="java:jboss/datasources/CompassDS" pool-name="CompassDS" enabled="true" use-ccm="false"> | ||
| + | <connection-url>jdbc:postgresql://192.168.0.20/db-name</connection-url> | ||
| + | <driver-class>org.postgresql.Driver</driver-class> | ||
| + | <driver>postgresql-9.1-902.jdbc4.jar</driver> | ||
| + | <pool> | ||
| + | <min-pool-size>0</min-pool-size> | ||
| + | <max-pool-size>2</max-pool-size> | ||
| + | </pool> | ||
| + | <security> | ||
| + | <user-name>username</user-name> | ||
| + | <password>password</password> | ||
| + | </security> | ||
| + | <validation> | ||
| + | <validate-on-match>false</validate-on-match> | ||
| + | <background-validation>false</background-validation> | ||
| + | </validation> | ||
| + | <statement> | ||
| + | <share-prepared-statements>false</share-prepared-statements> | ||
| + | </statement> | ||
| + | </datasource> | ||
| + | </code> | ||
| + | |||
| + | ==== Access the Datasource in Java ==== | ||
| + | |||
| + | <code java> | ||
| + | InitialContext ic = new InitialContext(); | ||
| + | DataSource ds = (DataSource) ic.lookup("java:jboss/datasources/CompassDS"); | ||
| + | Connection con = ds.getConnection(); | ||
| + | Statement stmt = con.createStatement(); | ||
| + | ResultSet rs = stmt.executeQuery("SELECT ..... "); | ||
| + | </code> | ||
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jboss_7_cookbook.txt ยท Last modified: 2013/12/23 13:09 by hkoller
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