org.janusgraph.graphdb

Class JanusGraphConcurrentTest

java.lang.Object

org.janusgraph.graphdb.JanusGraphBaseTest

org.janusgraph.graphdb.JanusGraphConcurrentTest

All Implemented Interfaces:

JanusGraphBaseStoreFeaturesTest

@Tag(value="PERFORMANCE_TESTS")
public abstract class JanusGraphConcurrentTest
extends JanusGraphBaseTest

High concurrency test cases to spot deadlocks and other failures that can occur under high degrees of parallelism.

Nested Class Summary

Nested classes/interfaces inherited from class org.janusgraph.graphdb.JanusGraphBaseTest

JanusGraphBaseTest.TestConfigOption

Field Summary

Fields inherited from class org.janusgraph.graphdb.JanusGraphBaseTest

config, DEFAULT_THREAD_COUNT, features, graph, ID_NAME, LABEL_NAME, logManagers, mgmt, readConfig, testInfo, tx

Constructor Summary

Constructors

Constructor and Description
JanusGraphConcurrentTest()

Method Summary

Modifier and Type	Method and Description
void	concurrentIndexReadWriteTest()
void	concurrentReadCommittedOnlyWithScriptEngine() Different threads should not be able to read uncommitted changes made by other threads when using a script engine
void	concurrentReadsOnSingleTransaction() Insert an extremely simple graph and start TASK_COUNT simultaneous readers in an executor with THREAD_COUNT threads.
void	concurrentReadWriteOnSingleTransaction() Tail many readers, as in concurrentReadsOnSingleTransaction(), but also start some threads that add and remove relationships and properties while the readers are working; all tasks share a common transaction.
void	concurrentTxRead()
void	setUp(org.junit.jupiter.api.TestInfo testInfo)
void	tearDown()
void	testStandardIndexVertexPropertyReads() Load-then-read test of standard-indexed vertex properties.
protected void	testStandardIndexVertexPropertyReadsLogic()

Methods inherited from class org.janusgraph.graphdb.JanusGraphBaseTest

assertMissing, asStream, clearGraph, clopen, close, closeLogManager, createExternalEdgeIndex, createExternalVertexIndex, disableIndex, discardIndex, dropIndex, enableIndex, evaluateQuery, evaluateQuery, evaluateQuery, evaluateQuery, evaluateQuery, evaluateQuery, evaluateQuery, executeScanJob, executeScanJob, finishSchema, getBackend, getConfig, getConfiguration, getE, getExternalIndex, getForceIndexGraph, getForceIndexGraph, getId, getOnlyEdge, getOnlyElement, getOnlyElement, getOnlyElement, getOnlyElement, getOnlyVertex, getStoreFeatures, getThreadCount, getV, getVertex, getVertex, getVertex, getVertex, makeKey, makeKeyedEdgeLabel, makeLabel, makeVertexIndexedKey, makeVertexIndexedUniqueKey, markIndexDiscarded, n, newTx, open, openTxLog, openUserLog, option, round, validateConfigOptions, verifyElementOrder, verifyElementOrder, wrapAround

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JanusGraphConcurrentTest

public JanusGraphConcurrentTest()

Method Detail

setUp

@BeforeEach
public void setUp(org.junit.jupiter.api.TestInfo testInfo)
                       throws Exception

Overrides:

setUp in class JanusGraphBaseTest

Throws:

Exception

tearDown

@AfterEach
public void tearDown()
                         throws Exception

Overrides:

tearDown in class JanusGraphBaseTest

Throws:

Exception

concurrentTxRead

@RepeatedTest(value=10)
public void concurrentTxRead()
                                              throws Exception

Throws:

Exception

concurrentReadsOnSingleTransaction

@RepeatedTest(value=10)
public void concurrentReadsOnSingleTransaction()
                                                                throws Exception

Insert an extremely simple graph and start TASK_COUNT simultaneous readers in an executor with THREAD_COUNT threads.

Throws:

Exception

concurrentReadCommittedOnlyWithScriptEngine

@Test
public void concurrentReadCommittedOnlyWithScriptEngine()
                                                       throws Exception

Different threads should not be able to read uncommitted changes made by other threads when using a script engine

Throws:

Exception

concurrentReadWriteOnSingleTransaction

@RepeatedTest(value=10)
public void concurrentReadWriteOnSingleTransaction()
                                                                    throws Exception

Tail many readers, as in concurrentReadsOnSingleTransaction(), but also start some threads that add and remove relationships and properties while the readers are working; all tasks share a common transaction.

The readers do not look for the properties or relationships the writers are mutating, since this is all happening on a common transaction.

Throws:

Exception

concurrentIndexReadWriteTest

@RepeatedTest(value=10)
public void concurrentIndexReadWriteTest()
                                                          throws Exception

Throws:

Exception

testStandardIndexVertexPropertyReads

@RepeatedTest(value=10)
public void testStandardIndexVertexPropertyReads()
                                                                  throws InterruptedException,
                                                                         ExecutionException

Load-then-read test of standard-indexed vertex properties. This test contains no edges.

The load stage is serial. The read stage is concurrent.

Create a set of vertex property types with standard indices (threadPoolSize * 5 by default) serially. Serially write 1k vertices with values for all of the indexed property types. Concurrently query the properties. Each thread uses a single, distinct transaction for all index retrievals in that thread.

Throws:

ExecutionException

InterruptedException

testStandardIndexVertexPropertyReadsLogic

protected void testStandardIndexVertexPropertyReadsLogic()
                                                  throws InterruptedException,
                                                         ExecutionException

Throws:

InterruptedException

ExecutionException