-
Notifications
You must be signed in to change notification settings - Fork 2.3k
/
MergeLockConcurrencyTest.java
140 lines (121 loc) · 4.29 KB
/
MergeLockConcurrencyTest.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
/*
* Copyright (c) 2002-2018 "Neo4j,"
* Neo4j Sweden AB [http://neo4j.com]
*
* This file is part of Neo4j Enterprise Edition. The included source
* code can be redistributed and/or modified under the terms of the
* GNU AFFERO GENERAL PUBLIC LICENSE Version 3
* (http://www.fsf.org/licensing/licenses/agpl-3.0.html) with the
* Commons Clause, as found in the associated LICENSE.txt file.
*
* 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 Affero General Public License for more details.
*
* Neo4j object code can be licensed independently from the source
* under separate terms from the AGPL. Inquiries can be directed to:
* licensing@neo4j.com
*
* More information is also available at:
* https://neo4j.com/licensing/
*/
package org.neo4j.locking;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CyclicBarrier;
import org.neo4j.function.ThrowingConsumer;
import org.neo4j.function.ThrowingFunction;
import org.neo4j.graphdb.Label;
import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.Transaction;
import org.neo4j.test.ConfigBuilder;
import org.neo4j.test.rule.DatabaseRule;
import org.neo4j.test.rule.ImpermanentDatabaseRule;
import org.neo4j.test.rule.concurrent.ThreadingRule;
import static org.junit.Assert.assertEquals;
import static org.neo4j.graphdb.factory.GraphDatabaseSettings.lock_manager;
import static org.neo4j.helpers.collection.Iterators.single;
import static org.neo4j.test.ConfigBuilder.configure;
import static org.neo4j.test.rule.concurrent.ThreadingRule.await;
@RunWith( Parameterized.class )
public class MergeLockConcurrencyTest
{
@Rule
public final DatabaseRule db = new ImpermanentDatabaseRule();
@Rule
public final ThreadingRule threads = new ThreadingRule();
@Parameterized.Parameters( name = "{0}" )
public static Iterable<Object[]> configurations()
{
return Arrays.asList(
configure( lock_manager, "community" ).asParameters(),
configure( lock_manager, "forseti" ).asParameters()
);
}
public MergeLockConcurrencyTest( ConfigBuilder config )
{
db.withSettings( config.configuration() );
}
@Test
public void shouldNotDeadlockOnMergeFollowedByPropertyAssignment() throws Exception
{
withConstraint( mergeThen( this::reassignProperties ) );
}
@Test
public void shouldNotDeadlockOnMergeFollowedByLabelReAddition() throws Exception
{
withConstraint( mergeThen( this::reassignLabels ) );
}
private void withConstraint( ThrowingFunction<CyclicBarrier,Node,Exception> action ) throws Exception
{
// given
db.execute( "CREATE CONSTRAINT ON (foo:Foo) ASSERT foo.bar IS UNIQUE" );
CyclicBarrier barrier = new CyclicBarrier( 2 );
Node node = mergeNode();
// when
List<Node> result = await( threads.multiple( barrier.getParties(), action, barrier ) );
// then
assertEquals( "size of result", 2, result.size() );
assertEquals( node, result.get( 0 ) );
assertEquals( node, result.get( 1 ) );
}
private ThrowingFunction<CyclicBarrier,Node,Exception> mergeThen(
ThrowingConsumer<Node,? extends Exception> action )
{
return barrier ->
{
try ( Transaction tx = db.beginTx() )
{
Node node = mergeNode();
barrier.await();
action.accept( node );
tx.success();
return node;
}
};
}
private Node mergeNode()
{
return (Node) single( db.execute( "MERGE (foo:Foo{bar:'baz'}) RETURN foo" ) ).get( "foo" );
}
private void reassignProperties( Node node )
{
for ( Map.Entry<String,Object> property : node.getAllProperties().entrySet() )
{
node.setProperty( property.getKey(), property.getValue() );
}
}
private void reassignLabels( Node node )
{
for ( Label label : node.getLabels() )
{
node.addLabel( label );
}
}
}