@Test
public void testWriteNoTransactionNoItems() throws Exception {
when(fileSystem.createNewFile(new Path(fileName))).thenReturn(true);
when(fileSystem.create(new Path(fileName))).thenReturn(fsDataOutputStream);
writer.open(null);
writer.write(new ArrayList<String>());
verifyZeroInteractions(fsDataOutputStream);
}
@Test
@SuppressWarnings("serial")
public void testWriteNoTransaction() throws Exception {
List<String> items =
new ArrayList<String>() {
{
add(new String("one"));
add(new String("two"));
}
};
when(fileSystem.createNewFile(new Path(fileName))).thenReturn(true);
when(fileSystem.create(new Path(fileName))).thenReturn(fsDataOutputStream);
writer.open(null);
writer.write(items);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
getBytes(items.get(0), stream);
getBytes(items.get(1), stream);
verify(fsDataOutputStream).write(stream.toByteArray());
}
/**
* A pointless use case but validates that the flag is still honored.
*
* @throws Exception
*/
@Test
@SuppressWarnings("serial")
public void testWriteTransactionReadOnly() throws Exception {
final List<String> items =
new ArrayList<String>() {
{
add(new String("one"));
add(new String("two"));
}
};
when(fileSystem.createNewFile(new Path(fileName))).thenReturn(true);
when(fileSystem.create(new Path(fileName))).thenReturn(fsDataOutputStream);
writer.open(null);
try {
TransactionTemplate transactionTemplate = new TransactionTemplate(transactionManager);
transactionTemplate.setReadOnly(true);
transactionTemplate.execute(
new TransactionCallback<Object>() {
@Override
public Object doInTransaction(TransactionStatus status) {
try {
writer.write(items);
} catch (Exception e) {
fail("An exception was thrown while writing: " + e.getMessage());
}
return null;
}
});
} catch (Throwable t) {
fail("Unexpected exception was thrown: " + t.getMessage());
}
verifyZeroInteractions(fsDataOutputStream);
}
@Test
@SuppressWarnings("serial")
public void testWriteTransaction() throws Exception {
final List<String> items =
new ArrayList<String>() {
{
add(new String("one"));
add(new String("two"));
}
};
when(fileSystem.createNewFile(new Path(fileName))).thenReturn(true);
when(fileSystem.create(new Path(fileName))).thenReturn(fsDataOutputStream);
writer.open(null);
new TransactionTemplate(transactionManager)
.execute(
new TransactionCallback<Object>() {
@Override
public Object doInTransaction(TransactionStatus status) {
try {
writer.write(items);
} catch (Exception e) {
fail("An exception was thrown while writing: " + e.getMessage());
}
return null;
}
});
ByteArrayOutputStream stream = new ByteArrayOutputStream();
getBytes(items.get(0), stream);
getBytes(items.get(1), stream);
verify(fsDataOutputStream).write(stream.toByteArray());
}