-
Notifications
You must be signed in to change notification settings - Fork 2.3k
/
FailureHeaderWriter.java
58 lines (52 loc) · 1.96 KB
/
FailureHeaderWriter.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
/*
* Copyright (c) 2002-2018 "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.impl.index.schema;
import java.util.Arrays;
import java.util.function.Consumer;
import org.neo4j.index.internal.gbptree.GBPTree;
import org.neo4j.io.pagecache.PageCursor;
/**
* Writes a failure message to a header in a {@link GBPTree}.
*/
class FailureHeaderWriter implements Consumer<PageCursor>
{
/**
* The {@code short} length field containing the length (number of bytes) of the failure message.
*/
private static final int HEADER_LENGTH_FIELD_LENGTH = 2;
private final byte[] failureBytes;
FailureHeaderWriter( byte[] failureBytes )
{
this.failureBytes = failureBytes;
}
@Override
public void accept( PageCursor cursor )
{
byte[] bytesToWrite = failureBytes;
cursor.putByte( NativeSchemaIndexPopulator.BYTE_FAILED );
int availableSpace = cursor.getCurrentPageSize() - cursor.getOffset();
if ( bytesToWrite.length + HEADER_LENGTH_FIELD_LENGTH > availableSpace )
{
bytesToWrite = Arrays.copyOf( bytesToWrite, availableSpace - HEADER_LENGTH_FIELD_LENGTH );
}
cursor.putShort( (short) bytesToWrite.length );
cursor.putBytes( bytesToWrite );
}
}