-
Notifications
You must be signed in to change notification settings - Fork 2.3k
/
LuceneIndexPopulator.java
100 lines (87 loc) · 3.08 KB
/
LuceneIndexPopulator.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
/*
* Copyright (c) 2002-2016 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.kernel.api.impl.schema.populator;
import org.apache.lucene.document.Document;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;
import org.neo4j.kernel.api.exceptions.index.IndexEntryConflictException;
import org.neo4j.kernel.api.impl.schema.LuceneDocumentStructure;
import org.neo4j.kernel.api.impl.schema.LuceneSchemaIndex;
import org.neo4j.kernel.api.impl.schema.writer.LuceneIndexWriter;
import org.neo4j.kernel.api.index.IndexPopulator;
import org.neo4j.kernel.api.index.NodePropertyUpdate;
public abstract class LuceneIndexPopulator implements IndexPopulator
{
protected LuceneSchemaIndex luceneIndex;
protected LuceneIndexWriter writer;
LuceneIndexPopulator( LuceneSchemaIndex luceneIndex )
{
this.luceneIndex = luceneIndex;
}
@Override
public void create() throws IOException
{
luceneIndex.create();
luceneIndex.open();
writer = luceneIndex.getIndexWriter();
}
@Override
public void drop() throws IOException
{
luceneIndex.drop();
}
@Override
public void add( List<NodePropertyUpdate> updates ) throws IndexEntryConflictException, IOException
{
// Lucene documents stored in a ThreadLocal and reused so we can't create an eager collection of documents here
// That is why we create a lazy Iterator and then Iterable
Iterator<Document> documents = updates.stream()
.map( LuceneIndexPopulator::updateAsDocument )
.iterator();
writer.addDocuments( () -> documents );
}
@Override
public void close( boolean populationCompletedSuccessfully ) throws IOException
{
try
{
if ( populationCompletedSuccessfully )
{
flush();
luceneIndex.markAsOnline();
}
}
finally
{
luceneIndex.close();
}
}
@Override
public void markAsFailed( String failure ) throws IOException
{
luceneIndex.markAsFailed( failure );
}
protected abstract void flush() throws IOException;
private static Document updateAsDocument( NodePropertyUpdate update )
{
return LuceneDocumentStructure.documentRepresentingProperty( update.getNodeId(), update.getValueAfter() );
}
}