Graph Database
The Graph Database Device Driver allows Iotellect Server storing topologies comprising nodes, edges and their properties. It is intended to hold data without constricting it to a pre-defined model. In Iotellect, the GraphDB driver matches sets of class instances and relations between them.
By their design, graph databases allow simple and fast retrieval of complex hierarchical structures that are difficult to model in relational systems.
The first available database driver class is Neo4j. It is capable of maintaining ultra-large-scale persistent graphs and provides a special graph query language used to load custom pieces of topology for in-memory analysis or visualization.
Another database driver class is TinkerGraph. It is a lightweight, in-memory property graph that serves as the reference implementation for the property graph model.
Driver Information
Driver Plugin ID: | com.tibbo.linkserver.plugin.device.graphdb |
Global Settings
None defined.
User Level Settings
None defined.
Device Account Properties
Connection Properties
Connection settings define how Iotellect Server communicates with a GraphDB server. The following table provides a list of available connection properties:
Setting | Description |
Embedded Database | Defines whether a graph database instance embedded into Iotellect Server should be used. |
Database Address | External graph database server's IP address or host name. |
Database Port | External graph database server's port number. |
Database Username | External graph database login. |
Database Password | External graph database password. |
Driver Class (only if not JDBC4 compliant) | Choose either TinkerGraph or Neo4j driver class. |
Additional Properties | Table containing advanced properties of database connection. The table has two columns: |
Request Pool Minimum Size | Minimum size of connections maintained in the request pool. |
Request Pool Maximum Size | Maximum size of connections maintained in the request pool. |
Request Pool Increment | Increment by which the request pool capacity is expanded. |
Device Assets
Assets are not supported by the driver.
Device Settings
The GraphDB device driver creates one dynamic Device variable called Database Statistics. This variable includes the following fields:
Field | Description |
Database Name | Shows database name. |
Database Version | Indicates database version. |
Database Driver Name | Your specified database driver name. |
Database Driver Version | Indicates database driver version. |
Connections | The number of established database connections. |
Busy Connections | The number of busy database connections. |
Device Operations
Execute Query
This action lets you execute an arbitrary query on the database. Both select and update queries are supported.
Device Events
No events provided by the driver.
Connection Handling
This driver makes the device Online if a connection was successfully established.
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