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JavaProceduresTest.java
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JavaProceduresTest.java
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/*
* Copyright (c) 2002-2018 "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.harness;
import org.codehaus.jackson.JsonNode;
import org.junit.Rule;
import org.junit.Test;
import java.util.stream.Stream;
import org.neo4j.graphdb.factory.GraphDatabaseSettings;
import org.neo4j.kernel.api.exceptions.ProcedureException;
import org.neo4j.kernel.configuration.Settings;
import org.neo4j.procedure.Context;
import org.neo4j.procedure.Mode;
import org.neo4j.procedure.Name;
import org.neo4j.procedure.Procedure;
import org.neo4j.server.configuration.ServerSettings;
import org.neo4j.test.rule.SuppressOutput;
import org.neo4j.test.rule.TestDirectory;
import org.neo4j.test.server.HTTP;
import static org.hamcrest.CoreMatchers.containsString;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertThat;
import static org.neo4j.test.server.HTTP.RawPayload.quotedJson;
public class JavaProceduresTest
{
@Rule
public TestDirectory testDir = TestDirectory.testDirectory();
@Rule
public SuppressOutput suppressOutput = SuppressOutput.suppressAll();
public static class MyProcedures
{
public static class OutputRecord
{
public long someNumber = 1337;
}
@Procedure
public Stream<OutputRecord> myProc()
{
return Stream.of( new OutputRecord() );
}
@Procedure
public Stream<OutputRecord> procThatThrows()
{
throw new RuntimeException( "This is an exception" );
}
}
public static class MyProceduresUsingMyService
{
public static class OutputRecord
{
public String result;
}
@Context
public SomeService service;
@Procedure("hello")
public Stream<OutputRecord> hello()
{
OutputRecord t = new OutputRecord();
t.result = service.hello();
return Stream.of( t );
}
}
public static class MyProceduresUsingMyCoreAPI
{
public static class LongResult
{
public Long value;
}
@Context
public MyCoreAPI myCoreAPI;
@Procedure( value = "makeNode", mode = Mode.WRITE )
public Stream<LongResult> makeNode( @Name( "label" ) String label ) throws ProcedureException
{
LongResult t = new LongResult();
t.value = myCoreAPI.makeNode( label );
return Stream.of( t );
}
@Procedure( value = "willFail", mode = Mode.READ )
public Stream<LongResult> willFail() throws ProcedureException
{
LongResult t = new LongResult();
t.value = myCoreAPI.makeNode( "Test" );
return Stream.of( t );
}
@Procedure( "countNodes" )
public Stream<LongResult> countNodes()
{
LongResult t = new LongResult();
t.value = myCoreAPI.countNodes();
return Stream.of( t );
}
}
private TestServerBuilder createServer( Class<?> procedureClass )
{
return TestServerBuilders.newInProcessBuilder()
.withProcedure( procedureClass )
.withConfig( ServerSettings.script_enabled, Settings.TRUE );
}
@Test
public void shouldLaunchWithDeclaredProcedures() throws Exception
{
// When
try ( ServerControls server = createServer( MyProcedures.class ).newServer() )
{
// Then
HTTP.Response response = HTTP.POST( server.httpURI().resolve( "db/data/transaction/commit" ).toString(),
quotedJson( "{ 'statements': [ { 'statement': 'CALL org.neo4j.harness.myProc' } ] }" ) );
JsonNode result = response.get( "results" ).get( 0 );
assertEquals( "someNumber", result.get( "columns" ).get( 0 ).asText() );
assertEquals( 1337, result.get( "data" ).get( 0 ).get( "row" ).get( 0 ).asInt() );
assertEquals( "[]", response.get( "errors" ).toString() );
}
}
@Test
public void shouldGetHelpfulErrorOnProcedureThrowsException() throws Exception
{
// When
try ( ServerControls server = createServer( MyProcedures.class ).newServer() )
{
// Then
HTTP.Response response = HTTP.POST( server.httpURI().resolve( "db/data/transaction/commit" ).toString(),
quotedJson( "{ 'statements': [ { 'statement': 'CALL org.neo4j.harness.procThatThrows' } ] }" ) );
String error = response.get( "errors" ).get( 0 ).get( "message" ).asText();
assertEquals( "Failed to invoke procedure `org.neo4j.harness.procThatThrows`: Caused by: java.lang.RuntimeException: This is an exception", error );
}
}
@Test
public void shouldWorkWithInjectableFromKernelExtension() throws Throwable
{
// When
try ( ServerControls server = createServer( MyProceduresUsingMyService.class ).newServer() )
{
// Then
HTTP.Response response = HTTP.POST( server.httpURI().resolve( "db/data/transaction/commit" ).toString(),
quotedJson( "{ 'statements': [ { 'statement': 'CALL hello' } ] }" ) );
assertEquals( "[]", response.get( "errors" ).toString() );
JsonNode result = response.get( "results" ).get( 0 );
assertEquals( "result", result.get( "columns" ).get( 0 ).asText() );
assertEquals( "world", result.get( "data" ).get( 0 ).get( "row" ).get( 0 ).asText() );
}
}
@Test
public void shouldWorkWithInjectableFromKernelExtensionWithMorePower() throws Throwable
{
// When
try ( ServerControls server = createServer( MyProceduresUsingMyCoreAPI.class )
.withConfig( GraphDatabaseSettings.record_id_batch_size, "1" )
.newServer() )
{
// Then
assertQueryGetsValue( server, "CALL makeNode(\\'Test\\')", 0L );
assertQueryGetsValue( server, "CALL makeNode(\\'Test\\')", 1L );
assertQueryGetsValue( server, "CALL makeNode(\\'Test\\')", 2L );
assertQueryGetsValue( server, "CALL countNodes", 3L );
assertQueryGetsError( server, "CALL willFail", "Write operations are not allowed" );
}
}
private void assertQueryGetsValue( ServerControls server, String query, long value ) throws Throwable
{
HTTP.Response response = HTTP.POST( server.httpURI().resolve( "db/data/transaction/commit" ).toString(),
quotedJson( "{ 'statements': [ { 'statement': '" + query + "' } ] }" ) );
assertEquals( "[]", response.get( "errors" ).toString() );
JsonNode result = response.get( "results" ).get( 0 );
assertEquals( "value", result.get( "columns" ).get( 0 ).asText() );
assertEquals( value, result.get( "data" ).get( 0 ).get( "row" ).get( 0 ).asLong() );
}
private void assertQueryGetsError( ServerControls server, String query, String error ) throws Throwable
{
HTTP.Response response = HTTP.POST( server.httpURI().resolve( "db/data/transaction/commit" ).toString(),
quotedJson( "{ 'statements': [ { 'statement': '" + query + "' } ] }" ) );
assertThat( response.get( "errors" ).toString(), containsString( error ) );
}
}