Hi, Gabriele: Thanks for the reminder.
Libraries (*.jar files) specific to an application should be in the application's WEB-INF/lib directory, and those shared by all applications should be in $CATALINA_HOME/common/lib. I put the database driver file in both directories just in case, but it did not work. I follow the Tomcat documentation, and have found one error on my part, i.e., the context.xml file to configure is not the $CATALINE_HOME/config/context.xml file, but the META-INF/context.xml file under the application, which is what the Tomcat documentation says. I think I am moving closer towards a solution. Thank you for contributing your idea. Jason -----Original Message----- From: Iannetti, Gabriele [mailto:[EMAIL PROTECTED] Sent: Thursday, October 04, 2007 3:04 AM To: Tomcat Users List Subject: AW: Configuring and using DataSource in Tomcat Hi Jason, do you know that you have to copy your used libraries to the lib directory in your used web-app? Regards, Gabriele _______________________________________________________ Gabriele Iannetti Werkstudent PROSTEP AG Dolivostraße 11, D-64293 Darmstadt Tel.: +49 6151 9287 301 Fax : +49 6151 9287 326 Mobil: +49 160 95 2626 51 Email: [EMAIL PROTECTED] http://www.prostep.com -----Ursprüngliche Nachricht----- Von: Heping Ling [mailto:[EMAIL PROTECTED] Gesendet: Dienstag, 2. Oktober 2007 20:01 An: users@tomcat.apache.org Betreff: Configuring and using DataSource in Tomcat Hi, everybody: I am new in doing web applications and new in using tomcat. I am having trouble configuring and using DataSource in Tomcat. Hope someone could see where the problem is. About the database: hostname is sb.lehman.cuny.edu schema name (sqlplus account name) is devtrack listener port is 1521 Oracle SID is idm0 1. J2SE SDK version on my PC: 1.5.0_11 2. File name and location of the JDBC driver: File name: ojdbc14dms.jar. I put it in c:\tomcat\common\lib. The driver file is copied from the JDeveloper that runs on the same PC as I run Tomcat. The JDeveloper runs servlets OK on the PC and accesses the same database OK with the 1.5.0_11 J2SE SDK. 3. The web.xml file At the very beginning of the application's deployment descriptor (c:\tomcat\webapps\myApp\WEB-INF\web.xml), I declared the JNDI reference for the database. Here is the beginning portion of the web.xml file: <?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd";> <web-app> <resource-ref> <description> Resource reference to a factory for java.sql.Connection instances </description> <res-ref-name> jdbc/DBDevTrackConnDS </res-ref-name> <res-type> javax.sql.DataSource </res-type> <res-auth> Container </res-auth> </resource-ref> 4. The c:\tomcat\conf\context.xml file I added the <Resource> element in the context.xml. The entire file of c:\tomcat\conf\context.xml is as follows: <!-- The contents of this file will be loaded for each web application --> <Context> <!-- Default set of monitored resources --> <WatchedResource>WEB-INF/web.xml</WatchedResource> <!-- Uncomment this to disable session persistence across Tomcat restarts --> <!-- <Manager pathname="" /> --> <Resource name="jdbc/DBDevTrackConnDS" auth="Container" type="javax.sql.DataSource" username="devtrack" password="test123" driverClassName="oracle.jdbc.driver.OracleDriver" url="jdbc:oracle:thin:@sb.lehman.cuny.edu:1521:idm0" maxActive="8" maxIdle="4" /> </Context> 5. The servlet file. The init() method in the serverlet file (for obtaining a DataSource object): public class LoginServletNew extends HttpServlet { PrintWriter out = null; DataSource ds = null; public void init() { try { Context initCtx = new InitialContext(); Context envCtx = (Context) initCtx.lookup("java:comp/env"); ds = (DataSource) envCtx.lookup("jdbc/DBDevTrackConnDS"); } catch (NamingException e) { e.printStackTrace(); } } The login() method that uses the DataSource: boolean login(String userName, String password) { try { Connection con = ds.getConnection(); Statement s = con.createStatement(); String sql = "SELECT LDAP_UID FROM Users" + " WHERE LDAP_UID='" + userName + "'" + " AND USER_TYPE='" + password + "'"; ResultSet rs = s.executeQuery(sql); if (rs.next()) { out.println("uid from query: " + rs.getString(1)); rs.close(); s.close(); con.close(); return true; } rs.close(); s.close(); con.close(); } 6. The trouble: The servlet compiles OK. It runs OK when the user is presented with the login form. But when the submit button is clicked that submits the username and password (i.e., the login() method is called), the browser receives an err page with the root cause as NoClassDefFoundError: root cause java.lang.NoClassDefFoundError: oracle/dms/instrument/ExecutionContextForJDBC In the localhost.2007-10-02.log file, the root cause stack is as follows: SEVERE: Servlet.service() for servlet NewLogin threw exception java.lang.NoClassDefFoundError: oracle/dms/instrument/ExecutionContextForJDBC at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:322) at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:151) at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java: 32) at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:608) at org.apache.tomcat.dbcp.dbcp.DriverConnectionFactory.createConnection(DriverC onnectionFactory.java:37) at org.apache.tomcat.dbcp.dbcp.PoolableConnectionFactory.makeObject(PoolableCon nectionFactory.java:290) at org.apache.tomcat.dbcp.dbcp.BasicDataSource.validateConnectionFactory(BasicD ataSource.java:877) at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource .java:851) at org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.ja va:540) at LoginServletNew.login(LoginServletNew.java:95) at LoginServletNew.doPost(LoginServletNew.java:77) at javax.servlet.http.HttpServlet.service(HttpServlet.java:710) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application FilterChain.java:269) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh ain.java:188) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja va:210) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja va:174) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127 ) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117 ) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java :108) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151) at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java: 834) at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(H ttp11AprProtocol.java:640) at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1286) at java.lang.Thread.run(Unknown Source) It seems to me that even though the JDBC driver was found and compilation was OK at compile time, it cannot be found at runtime. But it is not clear to me what is wrong and how to correct it. It would be very much appreciated if someone with experienced eye could spot the cause of the error and help me out. Jason ________________________________________________________________________ PROSTEP AG, Dolivostraße 11, D-64293 Darmstadt HR: Amtsgericht Darmstadt, HRB 8383 Vorstand: Dr. Bernd Pätzold (Vorsitz), Reinhard Betz Aufsichtsrat: Dr. Heinz-Gerd Lehnhoff (Vorsitz) ________________________________________________________________________ --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
