History

Sandro La Bruzzo bbe8193930 merged stable ids		2021-07-12 17:00:43 +02:00
..
src	merged stable ids	2021-07-12 17:00:43 +02:00
README.md	README.md for aggregation workflows	2021-03-03 16:18:34 +01:00
pom.xml	adjusted poms to align with the external dhp-schema module	2021-04-27 10:12:27 +02:00

README.md

Description of the Module

This module defines a set of oozie workflows for the collection and transformation of metadata records. Both workflows interact with the Metadata Store Manager (MdSM) to handle the logical transactions required to ensure the consistency of the read/write operations on the data as the MdSM in fact keeps track of the logical-physical mapping of each MDStore.

Metadata collection

The metadata collection workflow is responsible for harvesting metadata records from different protocols and responding to different formats and to store them as on HDFS so that they can be further processed.

Collector Plugins

Different protocols are managed by dedicated Collector plugins, i.e. java programs implementing a defined interface:

eu.dnetlib.dhp.collection.plugin.CollectorPlugin

The list of the supported plugins:

OAI Plugin: collects from OAI-PMH compatible endpoints
MDStore plugin: collects from a given D-Net MetadataStore, (identified by moogodb URI, dbName, MDStoreID)
MDStore dump plugin: collects from an MDStore dump stored on the HDFS location indicated by the path parameter

Transformation Plugins

TODO