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ListQueriesProcedureTest.java
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ListQueriesProcedureTest.java
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/*
* 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 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 java.io.PrintWriter;
import java.util.Map;
import java.util.concurrent.CountDownLatch;
import org.junit.Rule;
import org.junit.Test;
import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.Result;
import org.neo4j.graphdb.Transaction;
import org.neo4j.kernel.enterprise.ImpermanentEnterpriseDatabaseRule;
import org.neo4j.kernel.impl.factory.GraphDatabaseFacade;
import org.neo4j.test.rule.DatabaseRule;
import org.neo4j.test.rule.concurrent.ThreadingRule;
import static java.util.concurrent.TimeUnit.SECONDS;
import static org.hamcrest.CoreMatchers.instanceOf;
import static org.hamcrest.Matchers.greaterThan;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
import static org.neo4j.test.rule.concurrent.ThreadingRule.waitingWhileIn;
public class ListQueriesProcedureTest
{
@Rule
public final DatabaseRule db = new ImpermanentEnterpriseDatabaseRule();
@Rule
public final ThreadingRule threads = new ThreadingRule();
@Test
public void shouldContainTheQueryItself() throws Exception
{
// given
String query = "CALL dbms.listQueries";
// when
Result result = db.execute( query );
// then
Map<String,Object> row = result.next();
assertFalse( result.hasNext() );
assertEquals( query, row.get( "query" ) );
}
@Test
public void shouldProvideElapsedCpuTime() throws Exception
{
// given
CountDownLatch nodeLocked = new CountDownLatch( 1 ), listQueriesLatch = new CountDownLatch( 1 );
Node node;
try ( Transaction tx = db.beginTx() )
{
node = db.createNode();
node.setProperty( "v", 1L );
tx.success();
}
threads.execute( parameter ->
{
try ( Transaction tx = db.beginTx() )
{
tx.acquireWriteLock( node );
nodeLocked.countDown();
listQueriesLatch.await();
}
return null;
}, null );
nodeLocked.await();
threads.executeAndAwait( parameter ->
{
db.execute( "MATCH (n) SET n.v = n.v + 1" ).close();
return null;
}, null, waitingWhileIn( GraphDatabaseFacade.class, "execute" ), 5, SECONDS );
try
{
// when
Map<String,Object> data = getQueryListing( "MATCH (n) SET n.v = n.v + 1" );
// then
assertTrue( "should contain a 'cpuTimeMicros' field", data.containsKey( "cpuTimeMicros" ) );
Object cpuTime1 = data.get( "cpuTimeMicros" );
assertThat( cpuTime1, instanceOf( Long.class ) );
assertTrue( "should contain a 'status' field", data.containsKey( "status" ) );
Object status = data.get( "status" );
assertThat( status, instanceOf( Map.class ) );
@SuppressWarnings( "unchecked" )
Map<String,Object> statusMap = (Map<String,Object>) status;
assertEquals( "WAITING", statusMap.get( "state" ) );
assertEquals( "NODE", statusMap.get( "resourceType" ) );
assertArrayEquals( new long[]{node.getId()}, (long[]) statusMap.get( "resourceIds" ) );
assertTrue( "should contain a 'waitTimeMillis' field", data.containsKey( "waitTimeMillis" ) );
Object waitTime1 = data.get( "waitTimeMillis" );
assertThat( waitTime1, instanceOf( Long.class ) );
// when
data = getQueryListing( "MATCH (n) SET n.v = n.v + 1" );
// then
Long cpuTime2 = (Long) data.get( "cpuTimeMicros" );
assertThat( cpuTime2, greaterThan( (Long) cpuTime1 ) );
Long waitTime2 = (Long) data.get( "waitTimeMillis" );
assertThat( waitTime2, greaterThan( (Long) waitTime1 ) );
}
finally
{
listQueriesLatch.countDown();
}
}
private Map<String,Object> getQueryListing( String query )
{
try ( Result rows = db.execute( "CALL dbms.listQueries" ) )
{
while ( rows.hasNext() )
{
Map<String,Object> row = rows.next();
if ( query.equals( row.get( "query" ) ) )
{
return row;
}
}
}
throw new AssertionError( "query not active: " + query );
}
}