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BuiltInProceduresIT.java
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BuiltInProceduresIT.java
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/*
* Copyright (c) 2002-2016 "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 Affero 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.kernel.enterprise.builtinprocs;
import org.hamcrest.Matcher;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.Result;
import org.neo4j.test.DoubleLatch;
import org.neo4j.test.TestEnterpriseGraphDatabaseFactory;
import static org.hamcrest.CoreMatchers.hasItems;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.hasEntry;
public class BuiltInProceduresIT
{
private GraphDatabaseService gds = null;
@Before
public void init()
{
gds = new TestEnterpriseGraphDatabaseFactory().newImpermanentDatabase();
}
@After
public void tearDown()
{
if ( gds != null )
{
gds.shutdown();
}
}
@Test
public void listQueries() throws Throwable
{
// Given
String q1 = "UNWIND [1,2,3] AS x RETURN x";
String q2 = "UNWIND [4,5,6] AS x RETURN x";
ThreadedTestController controller = new ThreadedTestController( q1, q2 );
controller.waitForAllThreadsToStart();
// When
String query = "CALL dbms.listQueries()";
Result result = gds.execute( query );
// Then
List<Map<String,Object>> actual = result.stream().collect( Collectors.toList() );
assertThat( actual, hasItems(
hasQuery( q1 ),
hasQuery( q2 ),
hasQuery( query ) ) );
controller.waitForThreadsToFinish();
}
private class ThreadedTestController
{
private final DoubleLatch latch;
private final String[] queries;
private final ArrayList<Exception> failures = new ArrayList<>();
ThreadedTestController( String... queries )
{
this.latch = new DoubleLatch( queries.length + 1, true );
this.queries = queries;
}
void waitForAllThreadsToStart()
{
for ( String query : queries )
{
Runnable runnable = runQuery( latch, query, failures );
new Thread( runnable ).start();
}
}
void waitForThreadsToFinish() throws Exception
{
latch.finishAndWaitForAllToFinish();
for ( Exception e : failures )
{
throw e;
}
}
private Runnable runQuery( DoubleLatch latch, String query, ArrayList<Exception> failures )
{
return () ->
{
try
{
Result result = gds.execute( query );
latch.startAndWaitForAllToStart();
latch.finishAndWaitForAllToFinish();
result.close();
}
catch ( Exception e )
{
failures.add( e );
}
};
}
}
@SuppressWarnings( "unchecked" )
private Matcher<Map<String,Object>> hasQuery( String query )
{
return (Matcher<Map<String,Object>>) (Matcher) hasEntry( equalTo( "query" ), equalTo( query ) );
}
}