In addition to automatic dumping, dumps can be manually invoked by use of the JMX interface.
The JMX category SkyVault, DatabaseInformation, SchemaExport contains two operations:
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java.util.List dumpSchemaToXML()
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java.util.List dumpSchemaToXML(String prefixList)
The first operation takes no parameters and when invoked will create four dump files one for each prefix 'alf_', 'act_', 'jbpm_' and 'avm_'. The prefix means that only tables and sequences whose names begin with the prefix will be included in the dump. Related items, such as the indexes belonging to a particular table, will be dumped regardless of name.
The second variation takes a single String parameter and is a comma-separated list of prefixes that you wish to dump. If this operation were invoked with the parameter "alf_acl_, alf_node_" for example, then two files would be created (one for each prefix). The tables dumped in the first file would include alf_acl_change_set and alf_acl_member. Tables in the second file would include alf_node_aspects and alf_node_assoc. Neither file would include alf_locale or alf_permission since they do not carry one of the supplied prefixes.
Both of these calls will result in the log showing the location of the dumped files, but they also return a List of path names. JConsole will helpfully display these lists in a copy/paste friendly manner.