org.axonframework.eventstore.jdbc

Interface EventSqlSchema<T>

Type Parameters:

T - The data type used to store serialized objects

All Known Implementing Classes:

GenericEventSqlSchema

public interface EventSqlSchema<T>

Interface describing the operations that the JDBC Event Store needs to do on a backing database. This abstraction allows for different SQL dialects to be used in cases where the default doesn't suffice.

Since:

2.2

Author:

Kristian Rosenvold, Allard Buijze

Method Summary

Methods

Modifier and Type	Method and Description
SerializedDomainEventData<T>	createSerializedDomainEventData(ResultSet resultSet) Reads the current entry of the ResultSet into a SerializedDomainEventData.
Class<T>	getDataType() Returns the type used to store serialized payloads.
PreparedStatement	sql_createDomainEventEntryTable(Connection connection) Creates a PreparedStatement that allows for the creation of the table to store Event entries.
PreparedStatement	sql_createSnapshotEventEntryTable(Connection connection) Creates a PreparedStatement that allows for the creation of the table to store Snapshots.
Object	sql_dateTime(org.joda.time.DateTime input) Converts a DateTime to a data value suitable for the database scheme.
PreparedStatement	sql_fetchFromSequenceNumber(Connection connection, String type, Object aggregateIdentifier, long firstSequenceNumber) Creates a PreparedStatement that fetches event data for an aggregate with given type and identifier, starting at the given firstSequenceNumber.
PreparedStatement	sql_findSnapshotSequenceNumbers(Connection connection, String type, Object aggregateIdentifier) Creates a PreparedStatement that returns the sequence numbers of snapshots for an aggregate of given type and aggregateIdentifier.
PreparedStatement	sql_getFetchAll(Connection connection, String whereClause, Object[] parameters) Creates a PreparedStatement that fetches all event messages matching the given whereClause.
PreparedStatement	sql_insertDomainEventEntry(Connection connection, String eventIdentifier, String aggregateIdentifier, long sequenceNumber, org.joda.time.DateTime timestamp, String eventType, String eventRevision, T eventPayload, T eventMetaData, String aggregateType) Creates the PreparedStatement for inserting a DomainEvent in the Event Store, using given attributes.
PreparedStatement	sql_insertSnapshotEventEntry(Connection connection, String eventIdentifier, String aggregateIdentifier, long sequenceNumber, org.joda.time.DateTime timestamp, String eventType, String eventRevision, T eventPayload, T eventMetaData, String aggregateType) Creates the PreparedStatement for inserting a Snapshot Event in the Event Store, using given attributes.
PreparedStatement	sql_loadLastSnapshot(Connection connection, Object identifier, String aggregateType) Creates the PreparedStatement for loading the last snapshot event for an aggregate with given identifier and of given aggregateType.
PreparedStatement	sql_pruneSnapshots(Connection connection, String type, Object aggregateIdentifier, long sequenceOfFirstSnapshotToPrune) Creates a PreparedStatement that deletes all snapshots with a sequence identifier equal or lower to the given sequenceOfFirstSnapshotToPrune, for an aggregate of given type and aggregateIdentifier.

Method Detail

sql_loadLastSnapshot

PreparedStatement sql_loadLastSnapshot(Connection connection,
                                     Object identifier,
                                     String aggregateType)
                                       throws SQLException

Creates the PreparedStatement for loading the last snapshot event for an aggregate with given identifier and of given aggregateType.

Parameters:

connection - The connection to create the PreparedStatement for

identifier - The identifier of the aggregate to find the snapshot for

aggregateType - The type identifier of the aggregate

Returns:

a PreparedStatement with all parameters set

Throws:

SQLException - when an exception occurs while creating the prepared statement

sql_insertDomainEventEntry

PreparedStatement sql_insertDomainEventEntry(Connection connection,
                                           String eventIdentifier,
                                           String aggregateIdentifier,
                                           long sequenceNumber,
                                           org.joda.time.DateTime timestamp,
                                           String eventType,
                                           String eventRevision,
                                           T eventPayload,
                                           T eventMetaData,
                                           String aggregateType)
                                             throws SQLException

Creates the PreparedStatement for inserting a DomainEvent in the Event Store, using given attributes.

Parameters:

connection - The connection to create the PreparedStatement for

eventIdentifier - The unique identifier of the event

aggregateIdentifier - The identifier of the aggregate that generated the event

sequenceNumber - The sequence number of the event

timestamp - The time at which the Event Message was generated

eventType - The type identifier of the serialized event

eventRevision - The revision of the serialized event

eventPayload - The serialized payload of the Event

eventMetaData - The serialized meta data of the event

aggregateType - The type identifier of the aggregate the event belongs to

Returns:

a PreparedStatement with all parameters set

Throws:

SQLException - when an exception occurs while creating the prepared statement

sql_insertSnapshotEventEntry

PreparedStatement sql_insertSnapshotEventEntry(Connection connection,
                                             String eventIdentifier,
                                             String aggregateIdentifier,
                                             long sequenceNumber,
                                             org.joda.time.DateTime timestamp,
                                             String eventType,
                                             String eventRevision,
                                             T eventPayload,
                                             T eventMetaData,
                                             String aggregateType)
                                               throws SQLException

Creates the PreparedStatement for inserting a Snapshot Event in the Event Store, using given attributes.

Parameters:

connection - The connection to create the PreparedStatement for

eventIdentifier - The unique identifier of the event

aggregateIdentifier - The identifier of the aggregate that generated the event

sequenceNumber - The sequence number of the event

timestamp - The time at which the Event Message was generated

eventType - The type identifier of the serialized event

eventRevision - The revision of the serialized event

eventPayload - The serialized payload of the Event

eventMetaData - The serialized meta data of the event

aggregateType - The type identifier of the aggregate the event belongs to

Returns:

a PreparedStatement with all parameters set

Throws:

SQLException - when an exception occurs while creating the prepared statement

sql_pruneSnapshots

PreparedStatement sql_pruneSnapshots(Connection connection,
                                   String type,
                                   Object aggregateIdentifier,
                                   long sequenceOfFirstSnapshotToPrune)
                                     throws SQLException

Creates a PreparedStatement that deletes all snapshots with a sequence identifier equal or lower to the given sequenceOfFirstSnapshotToPrune, for an aggregate of given type and aggregateIdentifier.

Parameters:

connection - The connection to create the PreparedStatement for

type - The type identifier of the aggregate

aggregateIdentifier - The identifier of the aggregate

sequenceOfFirstSnapshotToPrune - The sequence number of the most recent snapshot to prune

Returns:

The PreparedStatement, ready to execute

Throws:

SQLException - when an exception occurs while creating the prepared statement

sql_findSnapshotSequenceNumbers

PreparedStatement sql_findSnapshotSequenceNumbers(Connection connection,
                                                String type,
                                                Object aggregateIdentifier)
                                                  throws SQLException

Creates a PreparedStatement that returns the sequence numbers of snapshots for an aggregate of given type and aggregateIdentifier.

Parameters:

connection - The connection to create the PreparedStatement for

type - The type identifier of the aggregate

aggregateIdentifier - The identifier of the aggregate

Returns:

The PreparedStatement, ready to execute, returning a single column with longs.

Throws:

SQLException - when an exception occurs while creating the prepared statement

sql_fetchFromSequenceNumber

PreparedStatement sql_fetchFromSequenceNumber(Connection connection,
                                            String type,
                                            Object aggregateIdentifier,
                                            long firstSequenceNumber)
                                              throws SQLException

Creates a PreparedStatement that fetches event data for an aggregate with given type and identifier, starting at the given firstSequenceNumber.

Parameters:

connection - The connection to create the PreparedStatement for

type - The type identifier of the aggregate

aggregateIdentifier - The identifier of the aggregate

firstSequenceNumber - The sequence number of the first event to return

Returns:

a PreparedStatement that returns columns that can be converted using createSerializedDomainEventData(java.sql.ResultSet)

Throws:

SQLException - when an exception occurs while creating the prepared statement

sql_getFetchAll

PreparedStatement sql_getFetchAll(Connection connection,
                                String whereClause,
                                Object[] parameters)
                                  throws SQLException

Creates a PreparedStatement that fetches all event messages matching the given whereClause. The given parameters provide the parameters used in the where clause, in the order of declaration.

Parameters:

connection - The connection to create the PreparedStatement for

whereClause - The SQL snippet to use after the WHERE directive. May be null or an empty String to indicate that no filter is to be applied

parameters - The parameters to set in the WHERE clause

Returns:

a PreparedStatement that returns columns that can be converted using createSerializedDomainEventData(java.sql.ResultSet)

Throws:

SQLException - when an exception occurs while creating the prepared statement

sql_createSnapshotEventEntryTable

PreparedStatement sql_createSnapshotEventEntryTable(Connection connection)
                                                    throws SQLException

Creates a PreparedStatement that allows for the creation of the table to store Snapshots.

Parameters:

connection - The connection to create the PreparedStatement for

Returns:

The Prepared Statement, ready to be executed

Throws:

SQLException - when an exception occurs while creating the prepared statement

sql_createDomainEventEntryTable

PreparedStatement sql_createDomainEventEntryTable(Connection connection)
                                                  throws SQLException

Creates a PreparedStatement that allows for the creation of the table to store Event entries.

Parameters:

connection - The connection to create the PreparedStatement for

Returns:

The Prepared Statement, ready to be executed

Throws:

SQLException - when an exception occurs while creating the prepared statement

createSerializedDomainEventData

SerializedDomainEventData<T> createSerializedDomainEventData(ResultSet resultSet)
                                                             throws SQLException

Reads the current entry of the ResultSet into a SerializedDomainEventData.

Note: the implementation *must* not change the ResultSet's cursor position.

Parameters:

resultSet - The result set returned from executing one of the Prepared Statements declared on this interface

Returns:

a single SerializedDomainEventData instance

Throws:

SQLException - when an exception occurs while creating the prepared statement

See Also:

SimpleSerializedDomainEventData

sql_dateTime

Object sql_dateTime(org.joda.time.DateTime input)

Converts a DateTime to a data value suitable for the database scheme.

Parameters:

input - DateTime to convert

Returns:

data representing the date time suitable for the current SQL scheme

getDataType

Class<T> getDataType()

Returns the type used to store serialized payloads.

Returns:

the type used to store serialized payloads