/**
* Returns a string describing what kind of {@code PTransform} this is.
*
* <p>By default, returns the base name of this {@code PTransform}'s class.
*/
protected String getKindString() {
if (getClass().isAnonymousClass()) {
return "AnonymousTransform";
} else {
return StringUtils.approximateSimpleName(getClass());
}
}
@Override
protected T nextImpl() throws IOException {
String encodedElementString = encodedElements.get(nextIndex++);
// TODO: Replace with the real encoding used by the
// front end, when we know what it is.
byte[] encodedElement = StringUtils.jsonStringToByteArray(encodedElementString);
notifyElementRead(encodedElement.length);
return CoderUtils.decodeFromByteArray(coder, encodedElement);
}
@Test
public void testCreateNormalParDoFn() throws Exception {
String stringState = "some state";
long longState = 42L;
TestDoFn fn = new TestDoFn(stringState, longState);
String serializedFn =
StringUtils.byteArrayToJsonString(
SerializableUtils.serializeToByteArray(
new DoFnInfo(fn, WindowingStrategy.globalDefault())));
CloudObject cloudUserFn = CloudObject.forClassName("DoFn");
addString(cloudUserFn, "serialized_fn", serializedFn);
String tag = "output";
MultiOutputInfo multiOutputInfo = new MultiOutputInfo();
multiOutputInfo.setTag(tag);
List<MultiOutputInfo> multiOutputInfos = Arrays.asList(multiOutputInfo);
PipelineOptions options = PipelineOptionsFactory.create();
DataflowExecutionContext context = BatchModeExecutionContext.fromOptions(options);
CounterSet counters = new CounterSet();
StateSampler stateSampler = new StateSampler("test", counters.getAddCounterMutator());
ParDoFn parDoFn =
factory.create(
options,
cloudUserFn,
"name",
"transformName",
null,
multiOutputInfos,
1,
context,
counters.getAddCounterMutator(),
stateSampler);
// Test that the factory created the correct class
assertThat(parDoFn, instanceOf(NormalParDoFn.class));
// Test that the DoFnInfo reflects the one passed in
NormalParDoFn normalParDoFn = (NormalParDoFn) parDoFn;
DoFnInfo doFnInfo = normalParDoFn.getDoFnInfo();
DoFn actualDoFn = doFnInfo.getDoFn();
assertThat(actualDoFn, instanceOf(TestDoFn.class));
assertThat(doFnInfo.getWindowingStrategy().getWindowFn(), instanceOf(GlobalWindows.class));
assertThat(
doFnInfo.getWindowingStrategy().getTrigger().getSpec(), instanceOf(DefaultTrigger.class));
// Test that the deserialized user DoFn is as expected
TestDoFn actualTestDoFn = (TestDoFn) actualDoFn;
assertEquals(stringState, actualTestDoFn.stringState);
assertEquals(longState, actualTestDoFn.longState);
assertEquals(context, normalParDoFn.getExecutionContext());
}