-
Notifications
You must be signed in to change notification settings - Fork 2.3k
/
StoreStatement.java
261 lines (238 loc) · 9.36 KB
/
StoreStatement.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
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
/*
* 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.api.store;
import java.util.function.Supplier;
import org.neo4j.cursor.Cursor;
import org.neo4j.kernel.api.exceptions.index.IndexNotFoundKernelException;
import org.neo4j.kernel.api.schema.index.IndexDescriptor;
import org.neo4j.kernel.impl.api.IndexReaderFactory;
import org.neo4j.kernel.impl.locking.Lock;
import org.neo4j.kernel.impl.locking.LockService;
import org.neo4j.kernel.impl.store.NeoStores;
import org.neo4j.kernel.impl.store.NodeStore;
import org.neo4j.kernel.impl.store.RecordCursors;
import org.neo4j.kernel.impl.store.RecordStore;
import org.neo4j.kernel.impl.store.RelationshipStore;
import org.neo4j.kernel.impl.store.record.RelationshipGroupRecord;
import org.neo4j.kernel.impl.util.InstanceCache;
import org.neo4j.storageengine.api.Direction;
import org.neo4j.storageengine.api.NodeItem;
import org.neo4j.storageengine.api.PropertyItem;
import org.neo4j.storageengine.api.RelationshipItem;
import org.neo4j.storageengine.api.StorageStatement;
import org.neo4j.storageengine.api.schema.IndexReader;
import org.neo4j.storageengine.api.schema.LabelScanReader;
import org.neo4j.storageengine.api.txstate.PropertyContainerState;
import org.neo4j.storageengine.api.txstate.ReadableTransactionState;
/**
* Statement for store layer. This allows for acquisition of cursors on the store data.
* <p/>
* The cursors call the release methods, so there is no need for manual release, only
* closing those cursor.
* <p/>
*/
public class StoreStatement implements StorageStatement
{
private final InstanceCache<NodeCursor> nodeCursor;
private final InstanceCache<StoreSingleRelationshipCursor> singleRelationshipCursor;
private final InstanceCache<StoreIteratorRelationshipCursor> iteratorRelationshipCursor;
private final InstanceCache<StoreNodeRelationshipCursor> nodeRelationshipsCursor;
private final InstanceCache<StorePropertyCursor> propertyCursorCache;
private final InstanceCache<StoreSinglePropertyCursor> singlePropertyCursorCache;
private final NeoStores neoStores;
private final NodeStore nodeStore;
private final RelationshipStore relationshipStore;
private final Supplier<IndexReaderFactory> indexReaderFactorySupplier;
private final RecordCursors recordCursors;
private final Supplier<LabelScanReader> labelScanStore;
private final RecordStore<RelationshipGroupRecord> relationshipGroupStore;
private IndexReaderFactory indexReaderFactory;
private LabelScanReader labelScanReader;
private boolean acquired;
private boolean closed;
public StoreStatement( NeoStores neoStores, Supplier<IndexReaderFactory> indexReaderFactory,
Supplier<LabelScanReader> labelScanReaderSupplier, LockService lockService )
{
this.neoStores = neoStores;
this.indexReaderFactorySupplier = indexReaderFactory;
this.labelScanStore = labelScanReaderSupplier;
this.nodeStore = neoStores.getNodeStore();
this.relationshipStore = neoStores.getRelationshipStore();
this.relationshipGroupStore = neoStores.getRelationshipGroupStore();
this.recordCursors = new RecordCursors( neoStores );
nodeCursor = new InstanceCache<NodeCursor>()
{
@Override
protected NodeCursor create()
{
return new NodeCursor( nodeStore.newRecord(), this, nodeStore, recordCursors, lockService );
}
};
singleRelationshipCursor = new InstanceCache<StoreSingleRelationshipCursor>()
{
@Override
protected StoreSingleRelationshipCursor create()
{
return new StoreSingleRelationshipCursor( relationshipStore.newRecord(), this, recordCursors,
lockService );
}
};
iteratorRelationshipCursor = new InstanceCache<StoreIteratorRelationshipCursor>()
{
@Override
protected StoreIteratorRelationshipCursor create()
{
return new StoreIteratorRelationshipCursor( relationshipStore.newRecord(), this, recordCursors,
lockService );
}
};
nodeRelationshipsCursor = new InstanceCache<StoreNodeRelationshipCursor>()
{
@Override
protected StoreNodeRelationshipCursor create()
{
return new StoreNodeRelationshipCursor( relationshipStore.newRecord(),
relationshipGroupStore.newRecord(), this, recordCursors, lockService );
}
};
propertyCursorCache = new InstanceCache<StorePropertyCursor>()
{
@Override
protected StorePropertyCursor create()
{
return new StorePropertyCursor( recordCursors, this );
}
};
singlePropertyCursorCache = new InstanceCache<StoreSinglePropertyCursor>()
{
@Override
protected StoreSinglePropertyCursor create()
{
return new StoreSinglePropertyCursor( recordCursors, this );
}
};
}
@Override
public void acquire()
{
assert !closed;
assert !acquired;
this.acquired = true;
}
@Override
public Cursor<NodeItem> acquireNodeCursor( ReadableTransactionState state )
{
neoStores.assertOpen();
return nodeCursor.get().init( new AllNodeProgression( nodeStore ), state );
}
@Override
public Cursor<NodeItem> acquireSingleNodeCursor( long nodeId, ReadableTransactionState state )
{
neoStores.assertOpen();
return nodeCursor.get().init( new SingleNodeProgression( nodeId ), state );
}
@Override
public Cursor<RelationshipItem> acquireSingleRelationshipCursor( long relId, ReadableTransactionState state )
{
neoStores.assertOpen();
return singleRelationshipCursor.get().init( relId, state );
}
@Override
public Cursor<RelationshipItem> acquireNodeRelationshipCursor( boolean isDense, long nodeId, long relationshipId,
Direction direction, int[] relTypes, ReadableTransactionState state )
{
neoStores.assertOpen();
return relTypes == null
? nodeRelationshipsCursor.get().init( isDense, relationshipId, nodeId, direction, state )
: nodeRelationshipsCursor.get().init( isDense, relationshipId, nodeId, direction, relTypes, state );
}
@Override
public Cursor<RelationshipItem> relationshipsGetAllCursor( ReadableTransactionState state )
{
neoStores.assertOpen();
return iteratorRelationshipCursor.get().init( new AllIdIterator( relationshipStore ), state );
}
@Override
public Cursor<PropertyItem> acquirePropertyCursor( long propertyId, Lock lock, PropertyContainerState state )
{
return propertyCursorCache.get().init( propertyId, lock, state );
}
@Override
public Cursor<PropertyItem> acquireSinglePropertyCursor( long propertyId, int propertyKeyId, Lock lock,
PropertyContainerState state )
{
return singlePropertyCursorCache.get().init( propertyKeyId, propertyId, lock, state );
}
@Override
public void release()
{
assert !closed;
assert acquired;
closeSchemaResources();
acquired = false;
}
@Override
public void close()
{
assert !closed;
closeSchemaResources();
recordCursors.close();
closed = true;
}
private void closeSchemaResources()
{
if ( indexReaderFactory != null )
{
indexReaderFactory.close();
// we can actually keep this object around
}
if ( labelScanReader != null )
{
labelScanReader.close();
labelScanReader = null;
}
}
@Override
public LabelScanReader getLabelScanReader()
{
return labelScanReader != null ?
labelScanReader : (labelScanReader = labelScanStore.get());
}
private IndexReaderFactory indexReaderFactory()
{
return indexReaderFactory != null ?
indexReaderFactory : (indexReaderFactory = indexReaderFactorySupplier.get());
}
@Override
public IndexReader getIndexReader( IndexDescriptor descriptor ) throws IndexNotFoundKernelException
{
return indexReaderFactory().newReader( descriptor );
}
@Override
public IndexReader getFreshIndexReader( IndexDescriptor descriptor ) throws IndexNotFoundKernelException
{
return indexReaderFactory().newUnCachedReader( descriptor );
}
@Override
public RecordCursors recordCursors()
{
return recordCursors;
}
}