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Persistence
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1: /*
2: * *********************************************************************************************************************
3: *
4: * blueMarine II: Semantic Media Centre
5: * http://tidalwave.it/projects/bluemarine2
6: *
7: * Copyright (C) 2015 - 2021 by Tidalwave s.a.s. (http://tidalwave.it)
8: *
9: * *********************************************************************************************************************
10: *
11: * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
12: * the License. You may obtain a copy of the License at
13: *
14: * http://www.apache.org/licenses/LICENSE-2.0
15: *
16: * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
17: * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
18: * specific language governing permissions and limitations under the License.
19: *
20: * *********************************************************************************************************************
21: *
22: * git clone https://bitbucket.org/tidalwave/bluemarine2-src
23: * git clone https://github.com/tidalwave-it/bluemarine2-src
24: *
25: * *********************************************************************************************************************
26: */
27: package it.tidalwave.bluemarine2.persistence;
28:
29: import javax.annotation.Nonnull;
30: import java.io.IOException;
31: import java.nio.file.Path;
32: import org.eclipse.rdf4j.repository.Repository;
33: import org.eclipse.rdf4j.repository.RepositoryConnection;
34: import org.eclipse.rdf4j.repository.RepositoryException;
35: import org.eclipse.rdf4j.rio.RDFHandlerException;
36:
37: /***********************************************************************************************************************
38: *
39: * This interface should not exist. For storing data into Persistence we're firing events to the messageBus. Why instead
40: * we retrieve data by directly accessing the repository? Perhaps we could switch to a coherently sync model for
41: * Persistence. In this case, AddStatementsRequest should me a private affair of DefaultMediaScanner.
42: *
43: * @author Fabrizio Giudici
44: *
45: **********************************************************************************************************************/
46: public interface Persistence
47: {
48: public static final Class<Persistence> _Persistence_ = Persistence.class;
49:
50: public static interface TransactionalTask<E extends Exception>
51: {
52: public void run (@Nonnull RepositoryConnection connection)
53: throws E, RepositoryException;
54: }
55:
56: @Nonnull
57: public Repository getRepository();
58:
59: public <E extends Exception> void runInTransaction (@Nonnull TransactionalTask<E> task)
60: throws E, RepositoryException;
61:
62: public void exportToFile (@Nonnull final Path path)
63: throws RDFHandlerException, IOException, RepositoryException;
64: }