-
Notifications
You must be signed in to change notification settings - Fork 2.3k
/
ReadOnlyTransactionStore.java
106 lines (94 loc) · 3.76 KB
/
ReadOnlyTransactionStore.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
101
102
103
104
105
106
/*
* Copyright (c) 2002-2017 "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.transaction.log;
import java.io.File;
import java.io.IOException;
import org.neo4j.io.fs.FileSystemAbstraction;
import org.neo4j.io.pagecache.PageCache;
import org.neo4j.kernel.impl.transaction.log.TransactionMetadataCache.TransactionMetadata;
import org.neo4j.kernel.impl.transaction.log.entry.LogEntryReader;
import org.neo4j.kernel.impl.transaction.log.entry.VersionAwareLogEntryReader;
import org.neo4j.kernel.lifecycle.LifeSupport;
import org.neo4j.kernel.lifecycle.LifecycleAdapter;
import org.neo4j.kernel.monitoring.Monitors;
/**
* Used for reading transactions off of file.
*/
public class ReadOnlyTransactionStore extends LifecycleAdapter implements LogicalTransactionStore
{
private final LifeSupport life = new LifeSupport();
private final LogicalTransactionStore physicalStore;
public ReadOnlyTransactionStore( PageCache pageCache, FileSystemAbstraction fs, File fromPath, Monitors monitors )
throws IOException
{
PhysicalLogFiles logFiles = new PhysicalLogFiles( fromPath, fs );
TransactionMetadataCache transactionMetadataCache = new TransactionMetadataCache( 100 );
LogHeaderCache logHeaderCache = new LogHeaderCache( 10 );
final ReadOnlyTransactionIdStore transactionIdStore = new ReadOnlyTransactionIdStore( pageCache, fromPath );
PhysicalLogFile logFile = life.add( new PhysicalLogFile( fs, logFiles, 0,
transactionIdStore::getLastCommittedTransactionId,
new ReadOnlyLogVersionRepository( pageCache, fromPath ),
monitors.newMonitor( PhysicalLogFile.Monitor.class ), logHeaderCache ) );
LogEntryReader<ReadableClosablePositionAwareChannel> logEntryReader = new VersionAwareLogEntryReader<>();
physicalStore = new PhysicalLogicalTransactionStore( logFile, transactionMetadataCache, logEntryReader,
monitors );
}
@Override
public TransactionCursor getTransactions( long transactionIdToStartFrom )
throws IOException
{
return physicalStore.getTransactions( transactionIdToStartFrom );
}
@Override
public TransactionCursor getTransactions( LogPosition position ) throws IOException
{
return physicalStore.getTransactions( position );
}
@Override
public TransactionCursor getTransactionsInReverseOrder( LogPosition backToPosition ) throws IOException
{
return physicalStore.getTransactionsInReverseOrder( backToPosition );
}
@Override
public TransactionMetadata getMetadataFor( long transactionId ) throws IOException
{
return physicalStore.getMetadataFor( transactionId );
}
@Override
public void init() throws Throwable
{
life.init();
}
@Override
public void start() throws Throwable
{
life.start();
}
@Override
public void stop() throws Throwable
{
life.stop();
}
@Override
public void shutdown() throws Throwable
{
life.shutdown();
}
}