/**
*
* Copyright
* 2009-2015 Jayway Products AB
* 2016-2017 Föreningen Sambruk
*
* Licensed under AGPL, Version 3.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.gnu.org/licenses/agpl.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package se.streamsource.streamflow.infrastructure.event.domain.source;
/**
* An EventSource is a source of events. Events are grouped in the transactions in which they were created.
*/
public interface EventSource
{
/**
* Get list of event transactions after the given timestamp. If they are on the exact same timestamp, they will not be included.
* <p/>
* The method uses the visitor pattern, so a visitor is sent in which is given each transaction, one at a time.
*
* @param afterTimestamp timestamp of transactions
* @param visitor for transactions
*/
void transactionsAfter( long afterTimestamp, TransactionVisitor visitor );
/**
* Get list of event transactions before the given timestamp. If they are on the exact same timestamp, they will not be included.
* <p/>
* The method uses the visitor pattern, so a visitor is sent in which is given each transaction, one at a time.
* <p/>
* The transactions are sent to the visitor with the latest transaction first, i.e. walking backwards in the stream.
*
* @param beforeTimestamp timestamp of transactions
* @param visitor for transactions
*/
void transactionsBefore( long beforeTimestamp, TransactionVisitor visitor);
}