Hvad er Context path og docbase

hvad står de 2 elementer for



<Context path="/DBTest" docBase="DBTest"
        debug="5" reloadable="true" crossContext="true">

 








<Logger className="org.apache.catalina.logger.FileLogger"
            prefix="localhost_DBTest_log." suffix=".txt"
            timestamp="true"/>

  <Resource name="jdbc/TestDB"
              auth="Container"
              type="javax.sql.DataSource"/>

  <ResourceParams name="jdbc/TestDB">
    <parameter>
      <name>factory</name>
      <value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
    </parameter>

    <!-- Maximum number of dB connections in pool. Make sure you
        configure your mysqld max_connections large enough to handle
        all of your db connections. Set to 0 for no limit.
        -->
    <parameter>
      <name>maxActive</name>
      <value>100</value>
    </parameter>

    <!-- Maximum number of idle dB connections to retain in pool.
        Set to 0 for no limit.
        -->
    <parameter>
      <name>maxIdle</name>
      <value>30</value>
    </parameter>

    <!-- Maximum time to wait for a dB connection to become available
        in ms, in this example 10 seconds. An Exception is thrown if
        this timeout is exceeded.  Set to -1 to wait indefinitely.
        -->
    <parameter>
      <name>maxWait</name>
      <value>10000</value>
    </parameter>

    <!-- MySQL dB username and password for dB connections  -->
    <parameter>
    <name>username</name>
    <value>javauser</value>
    </parameter>
    <parameter>
    <name>password</name>
    <value>javadude</value>
    </parameter>

    <!-- Class name for mm.mysql JDBC driver -->
    <parameter>
      <name>driverClassName</name>
      <value>org.gjt.mm.mysql.Driver</value>
    </parameter>

    <!-- The JDBC connection url for connecting to your MySQL dB.
        The autoReconnect=true argument to the url makes sure that the
        mm.mysql JDBC Driver will automatically reconnect if mysqld closed the
        connection.  mysqld by default closes idle connections after 8 hours.
        -->
    <parameter>
      <name>url</name>
      <value>jdbc:mysql://localhost:3306/javatest?autoReconnect=true</value>
    </parameter>
  </ResourceParams>
</Context>