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POProblems using Tomcat JDBC Connection Pool in Tomcat 7
 

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    <p>In server.xml:</p> <pre><code>&lt;GlobalNamingResources&gt; &lt;Resource name="jdbc/ArchiveDB" auth="Container" type="javax.sql.DataSource" driverClassName="oracle.jdbc.OracleDriver" factory="org.apache.tomcat.jdbc.pool.DataSourceFactory" ...etc </code></pre> <p>In web.xml:</p> <pre><code>&lt;resource-ref&gt; &lt;description&gt;Archive Database&lt;/description&gt; &lt;res-ref-name&gt;jdbc/ArchiveDB&lt;/res-ref-name&gt; &lt;res-type&gt;javax.sql.DataSource&lt;/res-type&gt; &lt;res-auth&gt;Container&lt;/res-auth&gt; &lt;/resource-ref&gt; </code></pre> <p>My Code:</p> <pre><code>Context ic = new InitialContext(); DataSource ds = (DataSource) ic.lookup( "java:/comp/env/jdbc/ArchiveDB" ); </code></pre> <p>I am getting the following exception:</p> <pre><code>java.lang.ClassCastException: org.apache.tomcat.dbcp.dbcp.BasicDataSource cannot be cast to org.apache.tomcat.jdbc.pool.DataSource </code></pre> <p>Any idea what I have got wrong? It seems that the factory field in the resource is not being used, but I have no idea how to find out why. Any ideas how I can progress?</p> <p>Update 1. Delving into source code, found the following in ResourceFactory.java</p> <pre><code>if (ref.getClassName().equals("javax.sql.DataSource")) { String javaxSqlDataSourceFactoryClassName = System.getProperty("javax.sql.DataSource.Factory", Constants.DBCP_DATASOURCE_FACTORY); </code></pre> <p>I guess I have to set that system property so it doesn't revert to default.</p> <p>Update 2. Have now set the following for startup:</p> <pre><code>-Djavax.sql.DataSource.Factory=org.apache.tomcat.jdbc.pool.DataSourceFactory </code></pre> <p>And getting different error:</p> <pre><code>09-Jun-2011 14:48:20 org.apache.naming.NamingContext lookup WARNING: Unexpected exception resolving reference java.sql.SQLException at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:243) Caused by: java.lang.NullPointerException at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Unknown Source) at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:236) ... 57 more javax.naming.NamingException at org.apache.naming.NamingContext.lookup(NamingContext.java:843) </code></pre> <p>I guess it is not able to pick up the driver info I specified.</p>
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    1. COI have a similar problem. What is the DataSource type when accessing the datasource from a class java? I use `org.apache.tomcat.jdbc.pool.DataSource`, or it should be `javax.sql.DataSource` (the latter is the value of the `type` attribute of the Resource)?
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      1. USSefran2
 

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