org.trellisldp.ext.cassandra.query.rdf

Class Mementoize

java.lang.Object

org.trellisldp.ext.cassandra.query.CassandraQuery

org.trellisldp.ext.cassandra.query.rdf.Mementoize

@ApplicationScoped
public class Mementoize
extends CassandraQuery

A query that records a version of a resource as a Memento.

Field Summary

Fields inherited from class org.trellisldp.ext.cassandra.query.CassandraQuery

consistency, queryString, readBinaryWorkers, session, writeWorkers

Constructor Summary

Constructors

Constructor and Description
Mementoize() For use with RESTeasy and CDI proxies.
Mementoize(com.datastax.oss.driver.api.core.CqlSession session, com.datastax.oss.driver.api.core.ConsistencyLevel consistency) Create a query that generates a memento.

Method Summary

Modifier and Type	Method and Description
java.util.concurrent.CompletionStage<java.lang.Void>	execute(org.trellisldp.api.Metadata metadata, java.time.Instant modified, org.apache.commons.rdf.api.Dataset data, java.util.UUID creation) Store a Memento.

Methods inherited from class org.trellisldp.ext.cassandra.query.CassandraQuery

executeSyncRead, preparedStatement, preparedStatementAsync

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Mementoize

public Mementoize()

For use with RESTeasy and CDI proxies.

API Note:

This construtor is used by CDI runtimes that require a public, no-argument constructor. It should not be invoked directly in user code.

Mementoize

@Inject
public Mementoize(com.datastax.oss.driver.api.core.CqlSession session,
                          @MutableWriteConsistency
                          com.datastax.oss.driver.api.core.ConsistencyLevel consistency)

Create a query that generates a memento.

Parameters:

session - the cassandra session

consistency - the consistency level

Method Detail

execute

public java.util.concurrent.CompletionStage<java.lang.Void> execute(org.trellisldp.api.Metadata metadata,
                                                                    java.time.Instant modified,
                                                                    org.apache.commons.rdf.api.Dataset data,
                                                                    java.util.UUID creation)

Store a Memento. Note that the value for modified is truncated to seconds because Memento requires HTTP time management.

Parameters:

metadata - metadata for this resource

modified - the time at which this resource was last modified

data - RDF for this resource

creation - a time-based (version 1) UUID for the moment this resource is created

Returns:

whether and when it has been inserted