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TransactionHookIT.java
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TransactionHookIT.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.kernel.impl.api.integrationtest;
import org.junit.Test;
import org.neo4j.internal.kernel.api.Write;
import org.neo4j.internal.kernel.api.exceptions.TransactionFailureException;
import org.neo4j.kernel.api.KernelTransaction;
import org.neo4j.kernel.api.TransactionHook;
import org.neo4j.kernel.api.exceptions.Status;
import org.neo4j.storageengine.api.StorageStatement;
import org.neo4j.storageengine.api.StoreReadLayer;
import org.neo4j.storageengine.api.txstate.ReadableTransactionState;
import static org.hamcrest.Matchers.equalTo;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.fail;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.verifyNoMoreInteractions;
import static org.mockito.Mockito.when;
public class TransactionHookIT extends KernelIntegrationTest
{
@Test
public void shouldRecieveTxStateOnCommit() throws Exception
{
// Given
TransactionHook hook = mock( TransactionHook.class );
kernel.registerTransactionHook( hook );
// When
Write ops = dataWriteInNewTransaction();
ops.nodeCreate();
commit();
// Then
verify( hook ).beforeCommit( any( ReadableTransactionState.class ), any( KernelTransaction.class ),
any( StoreReadLayer.class ), any( StorageStatement.class ) );
verify( hook ).afterCommit( any( ReadableTransactionState.class ), any( KernelTransaction.class ), any() );
verifyNoMoreInteractions( hook );
}
@Test
public void shouldRollbackOnFailureInBeforeCommit() throws Exception
{
// Given
TransactionHook hook = mock( TransactionHook.class );
final String message = "Original";
when( hook.beforeCommit( any( ReadableTransactionState.class ), any( KernelTransaction.class ),
any( StoreReadLayer.class ), any( StorageStatement.class ) ) ).thenReturn( new TransactionHook.Outcome()
{
@Override
public boolean isSuccessful()
{
return false;
}
@Override
public Throwable failure()
{
return new Throwable( message );
}
} );
kernel.registerTransactionHook( hook );
// When
Write ops = dataWriteInNewTransaction();
ops.nodeCreate();
try
{
commit();
fail("Expected this to fail.");
}
catch ( TransactionFailureException e )
{
assertThat( e.status(), equalTo( Status.Transaction.TransactionHookFailed ) );
assertThat( e.getCause().getMessage(), equalTo( message ) );
}
// Then
verify( hook ).beforeCommit( any( ReadableTransactionState.class ), any( KernelTransaction.class ),
any( StoreReadLayer.class ), any( StorageStatement.class ) );
verify( hook ).afterRollback( any( ReadableTransactionState.class ), any( KernelTransaction.class ),
any( TransactionHook.Outcome.class ) );
verifyNoMoreInteractions( hook );
}
}