General Purpose

Rosetta is packaged with many bundled plug-in implementations, all described in the Plug-in Management section of the Rosetta Configuration Guide.

This page provides information for users who wish to extend Rosetta functionality by developing additional implementations.

Plugin Methods

Rosetta supports two plugin methods:

Java Plugin: A Java code plug-in wrapped as a JAR file
Script Plugin: An executable shell script plug-in (wrapped in a JAR package). Scripting language should be specified using the Shebang line.

Please refer to the Interface section for each plug-in type to learn which method is supported for the respective plug-in.

Plugin Types

Access RightsARPluginRepositoryjavadocORCID
Archive DecomposerDecomposerPluginPreservationjavadocUnzip
Converter (Publishing)ConverterRegistryPluginRepositoryjavadocXEpicur
Custom FixityCustomFixityPluginRepositoryjavadocDummy
Field ValidatorFieldValidatorPluginRepositoryjavadocRegex
File Comparison (5.1+)FileComparisonPluginPreservationPSNR
Format IdentifierFormatIdentificationPluginRepositoryjavadocDummy
Format ValidatorFormatValidationPluginPreservationjavadoc
Full Text ExtractorFullTextExtractionPluginRepositoryjavadoc
Migration ToolMigrationToolPluginPreservationPDF to JPG
Persistent IdentifierPIGeneratorRepositoryjavadoc
Publisher (Publishing)PublisherRegistryPluginRepositoryjavadocCustom NFS
Repository TaskRepositoryTaskPluginRepositoryjavadocDC Replace
Risk ExtractorRiskExtractorjavadocDRMLINT
Start-up CheckStartUpCheckPluginRepositoryjavadocDiskSpace
Storage HandlerStoragePluginRepositoryjavadocAmazon S3
NFS in-place
NFS Pair-tree
Technical Metadata ExtractorTechnicalMDExtractorPluginPreservationjavadoc
Technical Metadata Extractor and Format ValidatorMDExtractorPluginPreservationjavadocJpylyzer
Format Library Extractors
Viewer Pre-ProcessorVPPPluginDeliveryjavadocFilePath
Customized Jpeg
IA BookReader (with ALTO)
IA BookReader (no ALTO)
Virus CheckVirusCheckPluginRepositoryClamAV
ClamAv (V2)

For a full functional description of each of the Plug-in types, please see the Rosetta Configuration Guide – Plug-in Management.

Error Handling


Developers can log errors to the server log using log4j or system.out.


In case of a script error (or an initiated exit with a return value other than 0) – the script’s echo messages will be printed to the log as an ERROR message in the following format:

Execution of  {script_full_path} failed: {echo_message}


Each plugin JAR file must contain a metadata XML file in the /PLUGIN-INF/ directory. The filename should contain ‘metadata’ and have an xml extension (e.g. metadata_myFirstPlugin.xml).

General Attributes

AttributeDescription (values)Mandatory
pluginTypeNameThe plugin type (see above table).Yes
moduleThe plugin module (see above table)Yes
displayNameThe name that will be displayed in the UI.Yes
classNameThe Java full path class name.Yes (java plug-in only)
initParametersAn x-form defining the plugin parameters and default parameter values (see table below).No
descriptionA short description of the plugin.No
versionThe plugin version (double-precision floating-point format).Yes
materialTypealways ‘DIGITAL’.Yes
implTypePlugin implementation type (script/java).Yes
contactPersonContact Info (see table below).Yes

Example (script):

<pl:metadata-config xmlns:pl="" xmlns:xsi="">
      <fr:x_form xmlns:fr="http://com/exlibris/digitool/common/forms/xmlbeans" />
      <contact_info xmlns="" />

X-form Attributes

AttributeDescription (values)Mandatory (default)
x_fieldsParameter declarationYes
x_fieldParameter configurationYes
labelParameter name in the UIYes
ui_tool_tipLabel tool-tipNo
default_valueA default value for the fieldNo
mandatoryIndication whether the parameter is mandatory (true/false)No (false)
x_ui_typeDetermines the UI component typeYes
css_classDetermines the CSS class of the field labelNo

Please see the x_form.xsd for more details.


<fr:x_form xmlns:fr="http://com/exlibris/digitool/common/forms/xmlbeans">
          <ui_tool_tip>record type</ui_tool_tip>
Make sure your plugin contains a method with the following signature:
Public void initParams(Map<String, String> initParams)
Retrieve the parameter values from the map by the field name and initialize the plugin members. For a field named ‘recordType’:
String recordType = initParams.get(“recordType”);

Contact Info Attributes

contactTypeA description of the administrative jobNo
firstNameFirst nameNo
lastNameLast nameNo
telephone1Primary telephone numberNo
telephone2Additional telephone numberNo
emailE-mail addressNo


    <contact_info xmlns="">
      <address1>1 Agodat Hasport Hapoel</address1>
      <address2>Building 9</address2>

Deployment and Installation

To deploy the plug-in, copy the jar file to $op_dir/plugins/custom. The dps user should have rw permissions on your file. Rosetta will display the plug-in in the list of custom plug-ins available for installation. If you are installing a new plugin, there is no need to restart Rosetta. If you are upgrading an existing plugin a restart is necessary, and you must be sure to increment the plugin version (see above, ‘General Attributes’).