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VLM Export

This is a technical documentation for the VLM Export Plugin. It enables the export to a VLM instance.

Introduction

This documentation describes the installation, configuration and use of the VLM export plugin in Goobi.

Using this plugin for Goobi, Goobi operations can be exported to the configured location for VLM within one step.

Details

Identifier

intranda_export_vlm

Source code

https://github.com/intranda/goobi-plugin-export-vlm

Licence

GPL 2.0 or newer

Documentation date

04.09.2023

Installation

This plugin is integrated into the workflow in such a way that it is executed automatically. For use within a workflow step, it should be configured as shown in the screenshot below.

The plugin must first be copied to the following directory:

/opt/digiverso/goobi/plugins/export/plugin_intranda_export_vlm.jar

In addition, there is a configuration file that must be located in the following place:

/opt/digiverso/goobi/config/plugin_intranda_export_vlm.xml

Configuration

The plugin is configured via the configuration file plugin_intranda_export_vlm.xml. The configuration can be adjusted during operation. The following is an example configuration file:

<?xml version="1.0" encoding="UTF-8"?>
<config_plugin>
	<!-- 
	Order of configuration is: 
	1.) project name matches
	2.) project is * 
	-->

	<!-- There could be multiple config blocks. -->
	<!-- Please make sure that the project names of different config blocks are also different. -->
	<!-- Given two config blocks with the same project name, the settings of the first one will be taken. -->
	<config>
		<!-- The name of the project -->
		<!-- MANDATORY -->
		<project>Archive_Project</project>
		
		<!-- The name of the system, e.g. AlmaIDDigital, AlephIDDigital, CatalogIDDigital.  -->
		<!-- This tag has the following two OPTIONAL attributes:
				- @anchorSplitter: if configured with a non-blank string, then it will be used to split the metadata value into two parts, where its head will be used 
						as the main folder's name, while its tail will be used as part of the volume's name. DEFAULT value is an empty string, i.e. no splitting expected.
				- @volumeFormat: only works when @anchorSplitter is configured with a non-blank string.
						It is used as the left padding if the volume's name is shorter than it. DEFAULT value is an empty string, i.e. no padding needed.
		 -->
		<!-- MANDATORY -->
		<identifier anchorSplitter="" volumeFormat="000">CatalogIDDigital</identifier>
	    
		<!-- The name to be used to distinguish between different volumes of one book series. -->
		<!-- Alternatively one may also choose "TitleDocMain", just assure its difference between volumes. -->
		<!-- Leave the default value unchanged if the book is a one-volume work. -->
		<!-- MANDATORY -->
		<volume>CurrentNoSorting</volume>
	    
		<!-- The place you would like to use for the export. -->
		<!-- Absolute path expected. No difference whether you append the directory separator '/' to the end or not. -->
		<!-- If left blank, then the default setting '/opt/digiverso/viewer/hotfolder' will be used. -->
		<path></path>
	    
		<!-- The prefix you would like to use for subfolders for different volumes. -->
		<!-- Leave it blank if no common prefix is needed. -->
		<subfolderPrefix>T_34_L_</subfolderPrefix>
		
		<!-- Whether or not use SFTP for the export. -->
		<!-- If true then use SFTP. If false then perform local export. -->
		<!-- If left blank, then the default setting 'false' will be used. -->
		<sftp>true</sftp>
		
		<!-- If true then use ssh key for connection. If false then use password. OPTIONAL. DEFAULT false. -->
		<useSshKey>false</useSshKey>
		
		<!-- Absolute path to the location of the file 'known_hosts'. -->
		<!-- If left blank, then the default setting '{user.home}/.ssh/known_hosts' will be used. OPTIONAL. -->
		<knownHosts></knownHosts>
		
		<!-- User name at the remote host. -->
		<!-- MANDATORY if sftp is set to be true. -->
		<username>CHANGE_ME</username>
		
		<!-- Name of the remote host. -->
		<!-- MANDATORY if sftp is set to be true. -->
		<hostname>CHANGE_ME</hostname>
		
		<!-- Port of the remote host. -->
		<!-- OPTIONAL. DEFAULT 22. -->
		<port>CHANGE_ME</port>
		
		<!-- Password to log into the remote host 'username'@'hostname'. -->
		<!-- MANDATORY if sftp is set to be true, while useSshKey is set to be false or not set. -->
		<password>CHANGE_ME</password>
		
		<!-- Path to the private key file, e.g. ~/.ssh/id_rsa -->
		<!-- The key is expected to be of PEM format, beginning with `BEGIN RSA PRIVATE KEY`. -->
		<!-- The OPENSSH format, beginning with `BEGIN OPENSSH PRIVATE KEY`, is not supported yet. -->
		<!-- MANDATORY if sftp and useSshKey are both set to be true. -->
		<keyPath>CHANGE_ME</keyPath>
	</config>
	
	<config>
		<project>Manuscript_Project</project>		
		<identifier>CatalogIDDigital</identifier>		
		<volume>CurrentNoSorting</volume>	
		<!-- Setting up path using a goobi variable. -->
		<!-- No difference whether you add a '/' between '}' and '..' or not. -->		
		<path>{goobiFolder}../viewer/hotfolder/</path>
		<!-- No common prefix needed. -->
		<subfolderPrefix></subfolderPrefix>
		
		<sftp>false</sftp>
		<!-- Use the default setting '{user.home}/.ssh/known_hosts'. -->
		<knownHosts></knownHosts>
		
		<username></username>
		<hostname></hostname>
		<password></password>
	</config>

	<!-- Apply this configuration only under the condition that the `singleDigCollection` in the metadata is a 20 digit number -->
	<config>
		<project>Manuscript_Project</project>		
		<identifier>CatalogIDDigital</identifier>		
		<volume>CurrentNoSorting</volume>		
		<path>/tmp/somewhere</path>
		<subfolderPrefix></subfolderPrefix>
		
		<condition>
            <type>variablematcher</type>
            <field>{meta.singleDigCollection}</field>
            <matches>\d{20}</matches>
        </condition>
		
		<sftp>false</sftp>
		<knownHosts></knownHosts>
		
		<username></username>
		<hostname></hostname>
		<password></password>
	</config>
	
	<config>
		<project>*</project>
		<identifier>CatalogIDDigital</identifier>
		<volume>CurrentNoSorting</volume>		
		<!-- Setting up path using an ABSOLUTE path. -->
		<path>/opt/digiverso/viewer/hotfolder</path>
		<!-- No common prefix needed. -->
		<subfolderPrefix></subfolderPrefix>
		
		<!-- Use the default setting 'false'. -->
		<sftp></sftp>
		<!-- Use the default setting '{user.home}/.ssh/known_hosts'. -->
		<knownHosts></knownHosts>
		
		<username></username>
		<hostname></hostname>
		<password></password>
	</config>

</config_plugin>
ParameterExplanation

identifier

This parameter determines which metadata is to be used as the folder name. It has two optional attributes @anchorSplitter and @volumeFormat which will be used for the case when the value of this identifier itself contains both main folder's name as well as volume's name, separated by this configured @anchorSplitter. The attribute @volumeFormat is used in this case as the left padding for the volume's name.

volume

This parameter controls with which metadata the subdirectories for volumes are to be named.

path

This parameter sets the export path where the data is to be exported. An absolute path is expected.

condition

This element is optional and can be present multiple times to define additional conditions under which this configuration can be used. The format of condition elements is described down below. A configuration section can only be processed, if all conditions apply. In case multiple configuration sections exist and more than one applies, the configuration section with the highest number of conditions is selected (more specialized conditions have a higher priority). If this is still not unique, any of the applying configurations can be chosen. In this case, an error message will be shown to the user.

subfolderPrefix

This parameter describes the prefix to be placed in front of each volume of a multi-volume work in the folder name. (Example T_34_L_: Here T_34 stands for the recognition for the creation of a structure node of the type volume and the L indicates that a text comes after it.).

sftp

This parameter determines whether to use SFTP for the export process or not.

useSshKey

This parameter determines whether to use a SSH key file for the connection to the remote host.

knownHosts

This parameter determines where the file known_hosts is. If left empty, then the default setting {user.home}/.ssh/known_hosts will be used. Otherwise, it is an absolute path expected here.

username

This parameter determines the user name to log into the remote host.

hostname

This parameter determines the name of the remote host or its IP address.

port

This parameter determines the port number of the remote host that is to be used for the connection. The default value for this is 22.

password

This parameter determines the password to be used to log into the remote host as username@hostname.

keyPath

This parameter determines the path to the SSH key file to be used to log into the remote host as username@hostname.

Condition format

Currently, there is support for only one type of condition, the variablematcher condition. This type of condition checks any kind of variable, that is defined as field, and performs a regular expression matching against the regular expression that is defined in matches.

A sample condition could look like:

<condition>
    <type>variablematcher</type>
    <field>{meta.singleDigCollection}</field>
    <matches>\d{20}</matches>
</condition>

This condition has the type variablematcher. It checks the field {meta.singleDigCollection}, which corresponds to the singleDigCollection value of the metadata file. The condition tries to match this field against the regular expression \d{20}, i. e. checks if the field consists of 20 digits.

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