plist to launch solr with launchd on mac os X

org.apache.solr.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC
     "-//Apple Computer//DTD PLIST 1.0//EN" "
    http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>Label</key>
    <string>org.apache.solr</string>
    <key>ProgramArguments</key>
    <array>
            <string>/usr/bin/java</string>
            <string>-Djetty.home=/opt/local/share/solr</string>
            <string>-Djetty.logs=/opt/local/share/solr/logs</string>
            <string>-Dsolr.solr.home=/opt/local/share/solr/multicore</string>
            <string>-jar</string>
            <string>/opt/local/share/solr/start.jar</string>
    </array>
    <key>ServiceDescription</key>
    <string>Solr</string>
    <key>WorkingDirectory</key>
    <string>/opt/local/share/solr</string>
    <key>UserName</key>
    <string>gregoire</string>
    <key>GroupName</key>
    <string>staff</string>
    <key>RunAtLoad</key>
    <true/>
</dict>
</plist>