# vi /opt/jboss/jboss-4.2.1.GA/server/default/deploy/hsqldb-ds.xml       <!-- For server mode db, allowing other processes to use hsqldb over tcp.       This requires the org.jboss.jdbc.HypersonicDatabase mbean. -->       <connection-url>jdbc:hsqldb:hsql://${jboss.bind.address}:1701</connection-url>       <!-- For in-process persistent db, saved when jboss stops.       The org.jboss.jdbc.HypersonicDatabase mbean is required for proper db shutdown       <connection-url>jdbc:hsqldb:${jboss.server.data.dir}${/}hypersonic${/}localDB</connection-url>       -->       <!-- When using in-process (standalone) mode       <depends>jboss:service=Hypersonic,database=localDB</depends>;       -->       <!-- Uncomment when using hsqldb in server mode -->       <depends>jboss:service=Hypersonic</depends>    <!-- Uncomment if you want hsqldb accessed over tcp (server mode) -->    <mbean code="org.jboss.jdbc.HypersonicDatabase"      name="jboss:service=Hypersonic">      <attribute name="Port">1701</attribute>      <attribute name="BindAddress">${jboss.bind.address}</attribute>      <attribute name="Silent">true</attribute>      <attribute name="Database">default</attribute>      <attribute name="Trace">false</attribute>      <attribute name="No_system_exit">true</attribute>    </mbean>    <!-- For hsqldb accessed from jboss only, in-process (standalone) mode    <mbean code="org.jboss.jdbc.HypersonicDatabase"      name="jboss:service=Hypersonic,database=localDB">      <attribute name="Database">localDB</attribute>      <attribute name="InProcessMode">true</attribute>    </mbean>    -->