Package org.odpi.openmetadata.repositoryservices.connectors.omrstopic

Class OMRSTopicConnector

java.lang.Object

org.odpi.openmetadata.frameworks.connectors.Connector

org.odpi.openmetadata.frameworks.connectors.ConnectorBase

org.odpi.openmetadata.repositoryservices.connectors.omrstopic.OMRSTopicConnector

All Implemented Interfaces:

AuditLoggingComponent, VirtualConnectorExtension, OMRSTopic, OpenMetadataTopicListener

public class OMRSTopicConnector
extends ConnectorBase
implements OMRSTopic, VirtualConnectorExtension, OpenMetadataTopicListener, AuditLoggingComponent

OMRSTopicConnector provides the support for the registration of OMRSTopicListeners and the distribution of OMRS events - both inbound and outbound.

The OMRSTopicConnector is a virtual connector. It uses one or more event bus connectors to interact with real event buses. These connectors are passed to it during initialization. During its operation, it acts as a go-between the event buses processing JSON payloads and internal open metadata components that expect to receive OMRS Events.

OMRSTopicConnector implements 3 interfaces:

• OMRSTopic provides the methods for OMRSTopicListeners to register with this connector.
• VirtualConnectorExtension declares this connector a virtual connector and provides the method for receiving the event bus connectors (embedded connectors).
• OpenMetadataTopicListener enables this object to register with the real event bus connectors that implement OpenMetadataTopic.

Nested Class Summary

Nested classes/interfaces inherited from class org.odpi.openmetadata.frameworks.connectors.ConnectorBase

ConnectorBase.ProtectedConnection

Field Summary

Fields

Modifier and Type	Field	Description
protected AuditLog	auditLog

Fields inherited from class org.odpi.openmetadata.frameworks.connectors.ConnectorBase

connectedAssetProperties, connectionBean, connectionProperties, connectorInstanceId, securedProperties

Constructor Summary

Constructors

Constructor	Description
OMRSTopicConnector()	Default constructor

Method Summary

Modifier and Type	Method	Description
void	disconnect()	Free up any resources held since the connector is no longer needed.
ComponentDescription	getConnectorComponentDescription()	Return the component description that is used by this connector in the audit log.
void	initializeEmbeddedConnectors(List<Connector> embeddedConnectors)	Registers itself as a listener of any OpenMetadataTopicConnectors that are passed as embedded connectors.
void	processEvent(String event)	Receives events from the real topic, parses them into event objects and passes them on to the OMRSTopicListeners registered with this connector.
void	registerListener(OMRSTopicListener topicListener)	Deprecated.
void	registerListener(OMRSTopicListener topicListener, String serviceName)	Register a listener object.
void	registerListener(OMRSTopicRepositoryEventListener topicListener, String serviceName)	Register a listener object.
void	sendInstanceEvent(OMRSInstanceEvent instanceEvent)	Set the instance event to the OMRS Topic connector if the instance event is of the permitted type.
void	sendRegistryEvent(OMRSRegistryEvent registryEvent)	Send the registry event to the OMRS Topic connector and manage errors
void	sendTypeDefEvent(OMRSTypeDefEvent typeDefEvent)	Send the TypeDef event to the OMRS Topic connector (providing TypeDef Events are enabled).
void	setAuditLog(AuditLog auditLog)	Receive an audit log object that can be used to record audit log messages.
void	setEventProtocolLevel(OMRSEventProtocolVersion eventProtocolVersion)	Set up the version of the protocol to use for events.
void	start()	Indicates that the connector is completely configured and can begin processing.

Methods inherited from class org.odpi.openmetadata.frameworks.connectors.ConnectorBase

equals, getConnectedAssetProperties, getConnection, getConnectorInstanceId, hashCode, initialize, initializeConnectedAssetProperties, isActive, toString

Methods inherited from class org.odpi.openmetadata.frameworks.connectors.Connector

clearStatisticProperty, clearStatisticTimestamp, getConnectorStatistics, getStatisticCounter, getStatisticProperty, getStatisticTimestamp, incrementStatisticCounter, initializeStatisticCounter, setStatisticProperty, setStatisticTimestamp

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

auditLog

protected AuditLog auditLog

Constructor Detail

OMRSTopicConnector

public OMRSTopicConnector()

Default constructor

Method Detail

initializeEmbeddedConnectors

public void initializeEmbeddedConnectors(List<Connector> embeddedConnectors)

Registers itself as a listener of any OpenMetadataTopicConnectors that are passed as embedded connectors.

Specified by:

initializeEmbeddedConnectors in interface VirtualConnectorExtension

Parameters:

embeddedConnectors - list of connectors

setAuditLog

public void setAuditLog(AuditLog auditLog)

Receive an audit log object that can be used to record audit log messages. The caller has initialized it with the correct component description and log destinations.

Specified by:

setAuditLog in interface AuditLoggingComponent

Parameters:

auditLog - audit log object

getConnectorComponentDescription

public ComponentDescription getConnectorComponentDescription()

Return the component description that is used by this connector in the audit log.

Specified by:

getConnectorComponentDescription in interface AuditLoggingComponent

Returns:

id, name, description, wiki page URL.

setEventProtocolLevel

public void setEventProtocolLevel(OMRSEventProtocolVersion eventProtocolVersion)

Set up the version of the protocol to use for events.

Specified by:

setEventProtocolLevel in interface OMRSTopic

Parameters:

eventProtocolVersion - version enum

registerListener

@Deprecated
public void registerListener(OMRSTopicListener topicListener)

Deprecated.

Register an OMRSTopicListener object. This object will be supplied with all the OMRS events received on the topic.

Specified by:

registerListener in interface OMRSTopic

Parameters:

topicListener - object implementing the OMRSTopicListener interface

registerListener

public void registerListener(OMRSTopicListener topicListener,
                             String serviceName)

Register a listener object. This object will be supplied with all the events received on the topic.

Specified by:

registerListener in interface OMRSTopic

Parameters:

topicListener - object implementing the OMRSTopicListener interface

serviceName - name of the service that the listener is from

registerListener

public void registerListener(OMRSTopicRepositoryEventListener topicListener,
                             String serviceName)

Register a listener object. This object will be supplied with all the events received on the topic.

Specified by:

registerListener in interface OMRSTopic

Parameters:

topicListener - object implementing the OMRSTopicRepositoryEventListener interface

serviceName - name of the service that the listener is from

start

public void start()
           throws ConnectorCheckedException

Indicates that the connector is completely configured and can begin processing. OMRSTopicConnector needs to pass on the start() to its embedded connectors.

Overrides:

start in class ConnectorBase

Throws:

ConnectorCheckedException - there is a problem within the connector.

sendRegistryEvent

public void sendRegistryEvent(OMRSRegistryEvent registryEvent)
                       throws ConnectorCheckedException

Send the registry event to the OMRS Topic connector and manage errors

Specified by:

sendRegistryEvent in interface OMRSTopic

Parameters:

registryEvent - properties of the event to send

Throws:

ConnectorCheckedException - the connector is not able to communicate with the event bus

sendTypeDefEvent

public void sendTypeDefEvent(OMRSTypeDefEvent typeDefEvent)
                      throws ConnectorCheckedException

Send the TypeDef event to the OMRS Topic connector (providing TypeDef Events are enabled).

Specified by:

sendTypeDefEvent in interface OMRSTopic

Parameters:

typeDefEvent - properties of the event to send

Throws:

ConnectorCheckedException - the connector is not able to communicate with the event bus

sendInstanceEvent

public void sendInstanceEvent(OMRSInstanceEvent instanceEvent)
                       throws ConnectorCheckedException

Set the instance event to the OMRS Topic connector if the instance event is of the permitted type.

Specified by:

sendInstanceEvent in interface OMRSTopic

Parameters:

instanceEvent - properties of the event to send

Throws:

ConnectorCheckedException - the connector is not able to communicate with the event bus

processEvent

public void processEvent(String event)

Receives events from the real topic, parses them into event objects and passes them on to the OMRSTopicListeners registered with this connector.

Specified by:

processEvent in interface OpenMetadataTopicListener

Parameters:

event - inbound event

disconnect

public void disconnect()
                throws ConnectorCheckedException

Free up any resources held since the connector is no longer needed.

Overrides:

disconnect in class ConnectorBase

Throws:

ConnectorCheckedException - there is a problem within the connector.