@Test
public void shouldCommitTransactionAndTellRegistryToForgetItsHandle() throws Exception {
// given
KernelAPI kernel = mockKernel();
TransitionalTxManagementKernelTransaction transactionContext =
(TransitionalTxManagementKernelTransaction) kernel.newTransaction();
TransactionRegistry registry = mock(TransactionRegistry.class);
when(registry.begin()).thenReturn(1337l);
ExecutionEngine engine = mock(ExecutionEngine.class);
ExecutionResult result = mock(ExecutionResult.class);
when(engine.execute("query", map())).thenReturn(result);
TransactionHandle handle =
new TransactionHandle(kernel, engine, registry, uriScheme, StringLogger.DEV_NULL);
ExecutionResultSerializer output = mock(ExecutionResultSerializer.class);
// when
handle.commit(
statements(new Statement("query", map(), false, (ResultDataContent[]) null)), output);
// then
InOrder transactionOrder = inOrder(transactionContext, registry);
transactionOrder.verify(transactionContext).commit();
transactionOrder.verify(registry).forget(1337l);
InOrder outputOrder = inOrder(output);
outputOrder.verify(output).statementResult(result, false, (ResultDataContent[]) null);
outputOrder.verify(output).errors(argThat(hasNoErrors()));
outputOrder.verify(output).finish();
verifyNoMoreInteractions(output);
}
@Test
public void getNonExistentKeyReturnsNull() throws Exception {
TransactionHandle txn = manager.beginTransaction();
assertEquals(null, KeyColumnValueStoreUtil.get(store, txn, 0, "col0"));
assertEquals(null, KeyColumnValueStoreUtil.get(store, txn, 0, "col1"));
txn.commit();
}
@Test
public void shouldSuspendTransactionAndReleaseForOtherRequestsAfterExecutingStatements()
throws Exception {
// given
KernelAPI kernel = mockKernel();
TransitionalTxManagementKernelTransaction transactionContext =
(TransitionalTxManagementKernelTransaction) kernel.newTransaction();
TransactionRegistry registry = mock(TransactionRegistry.class);
when(registry.begin()).thenReturn(1337l);
ExecutionEngine engine = mock(ExecutionEngine.class);
ExecutionResult executionResult = mock(ExecutionResult.class);
when(engine.execute("query", map())).thenReturn(executionResult);
TransactionHandle handle =
new TransactionHandle(kernel, engine, registry, uriScheme, StringLogger.DEV_NULL);
ExecutionResultSerializer output = mock(ExecutionResultSerializer.class);
// when
handle.execute(
statements(new Statement("query", map(), false, (ResultDataContent[]) null)), output);
// then
InOrder transactionOrder = inOrder(transactionContext, registry);
transactionOrder.verify(transactionContext).suspendSinceTransactionsAreStillThreadBound();
transactionOrder.verify(registry).release(1337l, handle);
InOrder outputOrder = inOrder(output);
outputOrder.verify(output).transactionCommitUri(uriScheme.txCommitUri(1337));
outputOrder.verify(output).statementResult(executionResult, false, (ResultDataContent[]) null);
outputOrder.verify(output).transactionStatus(anyLong());
outputOrder.verify(output).errors(argThat(hasNoErrors()));
outputOrder.verify(output).finish();
verifyNoMoreInteractions(output);
}
@Test
public void shouldLogMessageIfCypherSyntaxErrorOccurs() throws Exception {
// given
KernelAPI kernel = mockKernel();
ExecutionEngine executionEngine = mock(ExecutionEngine.class);
when(executionEngine.execute("matsch (n) return n", map()))
.thenThrow(new SyntaxException("did you mean MATCH?"));
StringLogger log = mock(StringLogger.class);
TransactionRegistry registry = mock(TransactionRegistry.class);
when(registry.begin()).thenReturn(1337l);
TransactionHandle handle =
new TransactionHandle(kernel, executionEngine, registry, uriScheme, log);
ExecutionResultSerializer output = mock(ExecutionResultSerializer.class);
// when
handle.commit(
statements(new Statement("matsch (n) return n", map(), false, (ResultDataContent[]) null)),
output);
// then
verify(registry).forget(1337l);
InOrder outputOrder = inOrder(output);
outputOrder.verify(output).errors(argThat(hasErrors(StatusCode.STATEMENT_SYNTAX_ERROR)));
outputOrder.verify(output).finish();
verifyNoMoreInteractions(output);
}
@Test
public void shouldExecuteStatements() throws Exception {
// given
KernelAPI kernel = mockKernel();
ExecutionEngine executionEngine = mock(ExecutionEngine.class);
ExecutionResult executionResult = mock(ExecutionResult.class);
when(executionEngine.execute("query", map())).thenReturn(executionResult);
TransactionRegistry registry = mock(TransactionRegistry.class);
when(registry.begin()).thenReturn(1337l);
TransactionHandle handle =
new TransactionHandle(kernel, executionEngine, registry, uriScheme, StringLogger.DEV_NULL);
ExecutionResultSerializer output = mock(ExecutionResultSerializer.class);
// when
handle.execute(
statements(new Statement("query", map(), false, (ResultDataContent[]) null)), output);
// then
verify(executionEngine).execute("query", map());
InOrder outputOrder = inOrder(output);
outputOrder.verify(output).transactionCommitUri(uriScheme.txCommitUri(1337));
outputOrder.verify(output).statementResult(executionResult, false, (ResultDataContent[]) null);
outputOrder.verify(output).transactionStatus(anyLong());
outputOrder.verify(output).errors(argThat(hasNoErrors()));
outputOrder.verify(output).finish();
verifyNoMoreInteractions(output);
}
@Test
public void shouldRollbackTransactionIfExecutionErrorOccurs() throws Exception {
// given
KernelAPI kernel = mockKernel();
TransitionalTxManagementKernelTransaction transactionContext =
(TransitionalTxManagementKernelTransaction) kernel.newTransaction();
TransactionRegistry registry = mock(TransactionRegistry.class);
when(registry.begin()).thenReturn(1337l);
ExecutionEngine executionEngine = mock(ExecutionEngine.class);
when(executionEngine.execute("query", map())).thenThrow(new NullPointerException());
TransactionHandle handle =
new TransactionHandle(kernel, executionEngine, registry, uriScheme, StringLogger.DEV_NULL);
ExecutionResultSerializer output = mock(ExecutionResultSerializer.class);
// when
handle.execute(
statements(new Statement("query", map(), false, (ResultDataContent[]) null)), output);
// then
verify(transactionContext).rollback();
verify(registry).forget(1337l);
InOrder outputOrder = inOrder(output);
outputOrder.verify(output).transactionCommitUri(uriScheme.txCommitUri(1337));
outputOrder
.verify(output)
.errors(argThat(hasErrors(StatusCode.INTERNAL_STATEMENT_EXECUTION_ERROR)));
outputOrder.verify(output).finish();
verifyNoMoreInteractions(output);
}
@Test
public void shouldLogMessageIfCommitErrorOccurs() throws Exception {
// given
KernelAPI kernel = mockKernel();
TransitionalTxManagementKernelTransaction transactionContext =
(TransitionalTxManagementKernelTransaction) kernel.newTransaction();
doThrow(new NullPointerException()).when(transactionContext).commit();
StringLogger log = mock(StringLogger.class);
TransactionRegistry registry = mock(TransactionRegistry.class);
when(registry.begin()).thenReturn(1337l);
ExecutionEngine engine = mock(ExecutionEngine.class);
ExecutionResult executionResult = mock(ExecutionResult.class);
when(engine.execute("query", map())).thenReturn(executionResult);
TransactionHandle handle = new TransactionHandle(kernel, engine, registry, uriScheme, log);
ExecutionResultSerializer output = mock(ExecutionResultSerializer.class);
// when
handle.commit(
statements(new Statement("query", map(), false, (ResultDataContent[]) null)), output);
// then
verify(log).error(eq("Failed to commit transaction."), any(NullPointerException.class));
verify(registry).forget(1337l);
InOrder outputOrder = inOrder(output);
outputOrder.verify(output).statementResult(executionResult, false, (ResultDataContent[]) null);
outputOrder
.verify(output)
.errors(argThat(hasErrors(StatusCode.INTERNAL_COMMIT_TRANSACTION_ERROR)));
outputOrder.verify(output).finish();
verifyNoMoreInteractions(output);
}
@Test
public void shouldRollbackTransactionAndTellRegistryToForgetItsHandle() throws Exception {
// given
KernelAPI kernel = mockKernel();
TransitionalTxManagementKernelTransaction transactionContext =
(TransitionalTxManagementKernelTransaction) kernel.newTransaction();
TransactionRegistry registry = mock(TransactionRegistry.class);
when(registry.begin()).thenReturn(1337l);
TransactionHandle handle =
new TransactionHandle(
kernel, mock(ExecutionEngine.class), registry, uriScheme, StringLogger.DEV_NULL);
ExecutionResultSerializer output = mock(ExecutionResultSerializer.class);
// when
handle.rollback(output);
// then
InOrder transactionOrder = inOrder(transactionContext, registry);
transactionOrder.verify(transactionContext).rollback();
transactionOrder.verify(registry).forget(1337l);
InOrder outputOrder = inOrder(output);
outputOrder.verify(output).errors(argThat(hasNoErrors()));
outputOrder.verify(output).finish();
verifyNoMoreInteractions(output);
}
@Test
public void shouldRollbackTransactionIfDeserializationErrorOccurs() throws Exception {
// given
KernelAPI kernel = mockKernel();
TransitionalTxManagementKernelTransaction transactionContext =
(TransitionalTxManagementKernelTransaction) kernel.newTransaction();
TransactionRegistry registry = mock(TransactionRegistry.class);
when(registry.begin()).thenReturn(1337l);
TransactionHandle handle =
new TransactionHandle(
kernel, mock(ExecutionEngine.class), registry, uriScheme, StringLogger.DEV_NULL);
ExecutionResultSerializer output = mock(ExecutionResultSerializer.class);
// when
handle.execute(
deserilizationErrors(new Neo4jError(StatusCode.INVALID_REQUEST_FORMAT, new Exception())),
output);
// then
verify(transactionContext).rollback();
verify(registry).forget(1337l);
InOrder outputOrder = inOrder(output);
outputOrder.verify(output).transactionCommitUri(uriScheme.txCommitUri(1337));
outputOrder.verify(output).errors(argThat(hasErrors(StatusCode.INVALID_REQUEST_FORMAT)));
outputOrder.verify(output).finish();
verifyNoMoreInteractions(output);
}
private void rollbackSuspended(Predicate<TransactionMarker> predicate) {
Set<Long> candidateTransactionIdsToRollback = new HashSet<Long>();
for (Map.Entry<Long, TransactionMarker> entry : registry.entrySet()) {
TransactionMarker marker = entry.getValue();
if (marker.isSuspended() && predicate.accept(marker)) {
candidateTransactionIdsToRollback.add(entry.getKey());
}
}
for (long id : candidateTransactionIdsToRollback) {
TransactionHandle handle;
try {
handle = acquire(id);
} catch (TransactionLifecycleException invalidTransactionId) {
// Allow this - someone snatched the transaction from under our feet,
continue;
}
try {
handle.forceRollback();
log.info(format("Transaction with id %d has been automatically rolled back.", id));
} catch (Throwable e) {
log.error(format("Transaction with id %d failed to roll back.", id), e);
} finally {
forget(id);
}
}
}
@Test
public void containsKeyReturnsFalseOnNonexistentKey() throws Exception {
TransactionHandle txn = manager.beginTransaction();
ByteBuffer key1 = KeyColumnValueStoreUtil.longToByteBuffer(1);
assertFalse(store.containsKey(key1.duplicate(), txn));
txn.commit();
}
@Test
public void getSliceRespectsAllBoundsInclusionArguments() throws Exception {
// Test case where endColumn=startColumn+1
ByteBuffer key = KeyColumnValueStoreUtil.longToByteBuffer(0);
ByteBuffer columnBeforeStart = KeyColumnValueStoreUtil.longToByteBuffer(776);
ByteBuffer columnStart = KeyColumnValueStoreUtil.longToByteBuffer(777);
ByteBuffer columnEnd = KeyColumnValueStoreUtil.longToByteBuffer(778);
ByteBuffer columnAfterEnd = KeyColumnValueStoreUtil.longToByteBuffer(779);
// First insert four test Entries
TransactionHandle txn = manager.beginTransaction();
List<Entry> entries =
Arrays.asList(
new Entry(columnBeforeStart, columnBeforeStart),
new Entry(columnStart, columnStart),
new Entry(columnEnd, columnEnd),
new Entry(columnAfterEnd, columnAfterEnd));
store.mutate(key, entries, null, txn);
txn.commit();
// getSlice() with only start inclusive
txn = manager.beginTransaction();
List<Entry> result = store.getSlice(key, columnStart, columnEnd, txn);
assertEquals(1, result.size());
assertEquals(777, result.get(0).getColumn().getLong());
txn.commit();
}
@Test
public void containsKeyColumnReturnsTrueOnExtantInput() throws Exception {
TransactionHandle txn = manager.beginTransaction();
KeyColumnValueStoreUtil.insert(store, txn, 1, "c", "v");
txn.commit();
txn = manager.beginTransaction();
ByteBuffer key1 = KeyColumnValueStoreUtil.longToByteBuffer(1);
ByteBuffer c = KeyColumnValueStoreUtil.stringToByteBuffer("c");
assertTrue(store.containsKeyColumn(key1.duplicate(), c.duplicate(), txn));
txn.commit();
}
// This is very very dirty, but do we have a choice?
public GraphAwareLongRunningTransaction(TransactionHandle transactionHandle) {
this.transactionHandle = transactionHandle;
try {
Field contextField = transactionHandle.getClass().getDeclaredField("context");
contextField.setAccessible(true);
transaction = (TransitionalTxManagementKernelTransaction) contextField.get(transactionHandle);
Field registryField = transactionHandle.getClass().getDeclaredField("registry");
registryField.setAccessible(true);
registry = (TransactionRegistry) registryField.get(transactionHandle);
Field idField = transactionHandle.getClass().getDeclaredField("id");
idField.setAccessible(true);
id = (long) idField.get(transactionHandle);
} catch (IllegalAccessException | NoSuchFieldException e) {
throw new RuntimeException(e);
}
}
@Test
public void insertingGettingAndDeletingSimpleDataWorks() throws Exception {
TransactionHandle txn = manager.beginTransaction();
KeyColumnValueStoreUtil.insert(store, txn, 0, "col0", "val0");
KeyColumnValueStoreUtil.insert(store, txn, 0, "col1", "val1");
txn.commit();
txn = manager.beginTransaction();
assertEquals("val0", KeyColumnValueStoreUtil.get(store, txn, 0, "col0"));
assertEquals("val1", KeyColumnValueStoreUtil.get(store, txn, 0, "col1"));
KeyColumnValueStoreUtil.delete(store, txn, 0, "col0");
KeyColumnValueStoreUtil.delete(store, txn, 0, "col1");
txn.commit();
txn = manager.beginTransaction();
assertEquals(null, KeyColumnValueStoreUtil.get(store, txn, 0, "col0"));
assertEquals(null, KeyColumnValueStoreUtil.get(store, txn, 0, "col1"));
txn.commit();
}
@Test
public void getSliceRespectsColumnLimit() throws Exception {
TransactionHandle txn = manager.beginTransaction();
ByteBuffer key = KeyColumnValueStoreUtil.longToByteBuffer(0);
final int cols = 1024;
List<Entry> entries = new LinkedList<Entry>();
for (int i = 0; i < cols; i++) {
ByteBuffer col = KeyColumnValueStoreUtil.longToByteBuffer(i);
entries.add(new Entry(col, col));
}
store.mutate(key, entries, null, txn);
txn.commit();
txn = manager.beginTransaction();
ByteBuffer columnStart = KeyColumnValueStoreUtil.longToByteBuffer(0);
ByteBuffer columnEnd = KeyColumnValueStoreUtil.longToByteBuffer(cols);
/*
* When limit is greater than or equal to the matching column count,
* all matching columns must be returned.
*/
List<Entry> result = store.getSlice(key, columnStart, columnEnd, cols, txn);
assertEquals(cols, result.size());
assertEquals(entries, result);
result = store.getSlice(key, columnStart, columnEnd, cols + 10, txn);
assertEquals(cols, result.size());
assertEquals(entries, result);
/*
* When limit is less the matching column count, the columns up to the
* limit (ordered bytewise) must be returned.
*/
result = store.getSlice(key, columnStart, columnEnd, cols - 1, txn);
assertEquals(cols - 1, result.size());
entries.remove(entries.size() - 1);
assertEquals(entries, result);
result = store.getSlice(key, columnStart, columnEnd, 1, txn);
assertEquals(1, result.size());
List<Entry> firstEntrySingleton = Arrays.asList(entries.get(0));
assertEquals(firstEntrySingleton, result);
txn.commit();
}
public void close() {
if (tx != null) tx.commit();
store.close();
manager.close();
}
