-
Notifications
You must be signed in to change notification settings - Fork 2.3k
/
TransactionStateMachineSPI.java
166 lines (150 loc) · 6.53 KB
/
TransactionStateMachineSPI.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
/*
* 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.bolt.v1.runtime;
import java.time.Clock;
import java.time.Duration;
import java.util.Map;
import java.util.function.Supplier;
import org.neo4j.bolt.v1.runtime.TransactionStateMachine.BoltResultHandle;
import org.neo4j.bolt.v1.runtime.spi.BoltResult;
import org.neo4j.function.ThrowingAction;
import org.neo4j.graphdb.Result;
import org.neo4j.kernel.AvailabilityGuard;
import org.neo4j.kernel.GraphDatabaseQueryService;
import org.neo4j.kernel.api.KernelTransaction;
import org.neo4j.kernel.api.exceptions.KernelException;
import org.neo4j.kernel.api.exceptions.TransactionFailureException;
import org.neo4j.kernel.api.security.SecurityContext;
import org.neo4j.kernel.api.txtracking.TransactionIdTracker;
import org.neo4j.kernel.impl.core.ThreadToStatementContextBridge;
import org.neo4j.kernel.impl.coreapi.InternalTransaction;
import org.neo4j.kernel.impl.coreapi.PropertyContainerLocker;
import org.neo4j.kernel.impl.query.Neo4jTransactionalContextFactory;
import org.neo4j.kernel.impl.query.QueryExecutionEngine;
import org.neo4j.kernel.impl.query.QueryExecutionKernelException;
import org.neo4j.kernel.impl.query.clientconnection.BoltConnectionInfo;
import org.neo4j.kernel.impl.query.clientconnection.ClientConnectionInfo;
import org.neo4j.kernel.impl.query.TransactionalContext;
import org.neo4j.kernel.impl.query.TransactionalContextFactory;
import org.neo4j.kernel.impl.transaction.log.TransactionIdStore;
import org.neo4j.kernel.internal.GraphDatabaseAPI;
import static org.neo4j.kernel.api.KernelTransaction.Type.implicit;
class TransactionStateMachineSPI implements TransactionStateMachine.SPI
{
private final GraphDatabaseAPI db;
private final ThreadToStatementContextBridge txBridge;
private final QueryExecutionEngine queryExecutionEngine;
private final TransactionIdTracker transactionIdTracker;
private static final PropertyContainerLocker locker = new PropertyContainerLocker();
private final TransactionalContextFactory contextFactory;
private final GraphDatabaseQueryService queryService;
private final Duration txAwaitDuration;
private final Clock clock;
TransactionStateMachineSPI( GraphDatabaseAPI db,
ThreadToStatementContextBridge txBridge,
QueryExecutionEngine queryExecutionEngine,
AvailabilityGuard availabilityGuard,
GraphDatabaseQueryService queryService,
Duration txAwaitDuration,
Clock clock )
{
this.db = db;
this.txBridge = txBridge;
this.queryExecutionEngine = queryExecutionEngine;
Supplier<TransactionIdStore> transactionIdStoreSupplier = db.getDependencyResolver().provideDependency( TransactionIdStore.class );
this.transactionIdTracker = new TransactionIdTracker( transactionIdStoreSupplier, availabilityGuard, clock );
this.contextFactory = Neo4jTransactionalContextFactory.create( queryService, locker );
this.queryService = queryService;
this.txAwaitDuration = txAwaitDuration;
this.clock = clock;
}
@Override
public void awaitUpToDate( long oldestAcceptableTxId ) throws TransactionFailureException
{
transactionIdTracker.awaitUpToDate( oldestAcceptableTxId, txAwaitDuration );
}
@Override
public long newestEncounteredTxId()
{
return transactionIdTracker.newestEncounteredTxId();
}
@Override
public KernelTransaction beginTransaction( SecurityContext securityContext )
{
db.beginTransaction( KernelTransaction.Type.explicit, securityContext );
return txBridge.getKernelTransactionBoundToThisThread( false );
}
@Override
public void bindTransactionToCurrentThread( KernelTransaction tx )
{
txBridge.bindTransactionToCurrentThread( tx );
}
@Override
public void unbindTransactionFromCurrentThread()
{
txBridge.unbindTransactionFromCurrentThread();
}
@Override
public boolean isPeriodicCommit( String query )
{
return queryExecutionEngine.isPeriodicCommit( query );
}
@Override
public BoltResultHandle executeQuery( BoltQuerySource querySource,
SecurityContext securityContext,
String statement,
Map<String,Object> params, ThrowingAction<KernelException> onFail ) throws QueryExecutionKernelException
{
InternalTransaction internalTransaction = queryService.beginTransaction( implicit, securityContext );
ClientConnectionInfo sourceDetails = new BoltConnectionInfo( querySource.principalName,
querySource.clientName,
querySource.connectionDescriptor.clientAddress,
querySource.connectionDescriptor.serverAddress );
TransactionalContext transactionalContext =
contextFactory.newContext( sourceDetails, internalTransaction, statement, params );
return new BoltResultHandle()
{
@Override
public BoltResult start() throws KernelException
{
try
{
Result run = queryExecutionEngine.executeQuery( statement, params, transactionalContext );
return new CypherAdapterStream( run, clock );
}
catch ( KernelException e )
{
onFail.apply();
throw new QueryExecutionKernelException( e );
}
catch ( Throwable e )
{
onFail.apply();
throw e;
}
}
@Override
public void terminate()
{
transactionalContext.terminate();
}
};
}
}