Components of the DataONE Infrastructure

The following diagrams indicate code dependencies between various components that make up the DataONE infrastructure. Functional dependencies are not depicted.

Common Components

Figure 1. Core shared components.

Integration Test Tools

Figure 2. Test services.

Coordinating Node Components

Figure 3. Coordinating node components.

Member Node Components and Instances

Figure 4. Member node implementations (ovals) and instances (rectangles).

Investigator Toolkit Components

Figure 5. Investigator toolkit.

Table of Components

Components

Component	Category	Responsible	Description
dataonetypes	Common	MJ	Schema used for defining serialization of core data types
d1_architecture	Common	DV	The system architecture documentation
operations	Operations	DV	Operations documentation - servers etc
d1_common_java	Common	RW	Base DataONE library in Java
d1_common_python	Common	RD	Base DataONE library in Python
d1_libclient_java	Common	RN	Client library implemented in Java
d1_libclient_python	Common	RD	Client library implemented in Python
d1_web_test_site	Testing	RN	Member node integration testing service
d1_echo_service	Testing	DV	A HTTP echo service used for testing
d1_integration	Testing	RN	Integration testing for components and combinations thereof
Certificates	Testing	RW	Generation and management of certificates for use by server components
d1_instance_generator	Testing	RD	Generates example instances of objects defined in dataoneTypes.xsd
one_mercury	CN	GP	The search interface that is implemented by the Mercury search index
cn_metacat	CN	CJ	The Metacat application. Currently employed as the replicated object store on Coordinating Nodes.
d1_cn_index_processor	CN	SR/DV	Populates the SOLR index by extracting informaton from system metadata, science metadata and resource maps.
d1_cn_index_generator	CN	SR/DV	Generates indexing tasks when new objects appear or system metadata changes
d1_cn_index_common	CN	SR/DV	Code shared between the indexing components
indexerapi	CN	SR/DV	A library used by the index_processor for extracting content from various types of XML structures such as system metadata, science metadata and resource maps.
d1_portal_servlet	CN	BL	Provides a UI for interacting with the CILogon service, an authentication proxy service
d1_portal	CN	BL	Implements the certificate manager used by the portal servlets
d1_identity_manager	CN	BL	Provides mechanisms for managing subjects in dataone
d1_process_daemon	CN	RW	Monitors content on member nodes, creating tasks for synchronization and replication
d1_synchronization	CN	RW	Manages the synchronization of content between Member Nodes and the Coordinating Nodes.
d1_replication	CN	CJ	Manages replication of content between Member Nodes
d1_cn_noderegistry	CN	RW	A register of coordinating and member nodes participating in a DataONE environment
d1_cn_common	CN	RW	A library of code shared between coordintating node components
d1_cn_rest	CN	RW	The coordinating node HTTP REST service interface
d1_cn_rest_proxy	CN	RW	Proxies requests coming in to a CN to underlying service implementations such as the object store (i.e. Metacat)
d1_cn_service	CN	RW	Coordinating node service, implementing the service APIs, data storage, and CN replication.
d1_simple_search	CN	DV	A simple search interface using Javascript and the SOLR interface.
Metacat	MN	CJ	The Metacat application. Implements the DataONE MN service interfaces.
Dryad	MN	RS	A member node implementation and instance for the Dryad repository
GMN	MN	RD	A generic, standalone Member Node implementation written in Python using the Django framework.
Mercury_MN	MN	JG	Mercury implementation of the Member Node services
d1_client_cli	ITK	RD	A command line client for interacting with the DataONE infrastructure. Currently implemented using d1_libclient_python.
d1_client_fuse	ITK	DV	A FUSE driver for mounting the DataONE infrastructure as a file system.
d1_client_dokan	ITK	DV	An extention of the FUSE driver that is based on Dokan for use on Microsoft Windows systems.
d1_client_r	ITK	MJ	A plugin for R that enables access to DataONE content from the R application. Implemented using d1_libclient_java.
hzpeek	Testing	DV	A tool for examining the Hazelcast queues on the CNs
debian_packaging	CN	RW	Debian packages for the CN components