public static CombineValuesFn create(
PipelineOptions options,
CloudObject cloudUserFn,
String stepName,
@Nullable List<SideInputInfo> sideInputInfos,
@Nullable List<MultiOutputInfo> multiOutputInfos,
Integer numOutputs,
ExecutionContext executionContext,
CounterSet.AddCounterMutator addCounterMutator,
StateSampler stateSampler /* unused */)
throws Exception {
Object deserializedFn =
SerializableUtils.deserializeFromByteArray(
getBytes(cloudUserFn, PropertyNames.SERIALIZED_FN), "serialized user fn");
Preconditions.checkArgument(deserializedFn instanceof Combine.KeyedCombineFn);
final Combine.KeyedCombineFn combineFn = (Combine.KeyedCombineFn) deserializedFn;
// Get the combine phase, default to ALL. (The implementation
// doesn't have to split the combiner).
final String phase = getString(cloudUserFn, PropertyNames.PHASE, CombinePhase.ALL);
Preconditions.checkArgument(
sideInputInfos == null || sideInputInfos.size() == 0,
"unexpected side inputs for CombineValuesFn");
Preconditions.checkArgument(numOutputs == 1, "expected exactly one output for CombineValuesFn");
DoFnInfoFactory fnFactory =
new DoFnInfoFactory() {
@Override
public DoFnInfo createDoFnInfo() {
DoFn doFn = null;
switch (phase) {
case CombinePhase.ALL:
doFn = new CombineValuesDoFn(combineFn);
break;
case CombinePhase.ADD:
doFn = new AddInputsDoFn(combineFn);
break;
case CombinePhase.MERGE:
doFn = new MergeAccumulatorsDoFn(combineFn);
break;
case CombinePhase.EXTRACT:
doFn = new ExtractOutputDoFn(combineFn);
break;
default:
throw new IllegalArgumentException(
"phase must be one of 'all', 'add', 'merge', 'extract'");
}
return new DoFnInfo(doFn, null);
}
};
return new CombineValuesFn(options, fnFactory, stepName, executionContext, addCounterMutator);
}
@Override
public void setConf(Configuration conf) {
this.conf = conf;
if (conf != null) {
String headerString = conf.get(SAM_HEADER_PROPERTY_NAME);
if (headerString == null) {
throw new IllegalStateException("SAM file header has not been set");
}
byte[] headerBytes = Base64.getDecoder().decode(headerString);
setSAMHeader(
(SAMFileHeader)
SerializableUtils.deserializeFromByteArray(headerBytes, "SAMFileHeader"));
}
}
@SuppressWarnings({"rawtypes", "unchecked"})
public static GroupAlsoByWindowsParDoFn create(
PipelineOptions options,
CloudObject cloudUserFn,
String stepName,
@Nullable List<SideInputInfo> sideInputInfos,
@Nullable List<MultiOutputInfo> multiOutputInfos,
Integer numOutputs,
ExecutionContext executionContext,
CounterSet.AddCounterMutator addCounterMutator,
StateSampler sampler /* unused */)
throws Exception {
Object windowingStrategyObj;
byte[] encodedWindowingStrategy = getBytes(cloudUserFn, PropertyNames.SERIALIZED_FN);
if (encodedWindowingStrategy.length == 0) {
windowingStrategyObj = WindowingStrategy.globalDefault();
} else {
windowingStrategyObj =
SerializableUtils.deserializeFromByteArray(
encodedWindowingStrategy, "serialized windowing strategy");
if (!(windowingStrategyObj instanceof WindowingStrategy)) {
throw new Exception(
"unexpected kind of WindowingStrategy: " + windowingStrategyObj.getClass().getName());
}
}
WindowingStrategy windowingStrategy = (WindowingStrategy) windowingStrategyObj;
byte[] serializedCombineFn = getBytes(cloudUserFn, PropertyNames.COMBINE_FN, null);
KeyedCombineFn combineFn;
if (serializedCombineFn != null) {
Object combineFnObj =
SerializableUtils.deserializeFromByteArray(serializedCombineFn, "serialized combine fn");
if (!(combineFnObj instanceof KeyedCombineFn)) {
throw new Exception(
"unexpected kind of KeyedCombineFn: " + combineFnObj.getClass().getName());
}
combineFn = (KeyedCombineFn) combineFnObj;
} else {
combineFn = null;
}
Map<String, Object> inputCoderObject = getObject(cloudUserFn, PropertyNames.INPUT_CODER);
Coder inputCoder = Serializer.deserialize(inputCoderObject, Coder.class);
if (!(inputCoder instanceof WindowedValueCoder)) {
throw new Exception(
"Expected WindowedValueCoder for inputCoder, got: " + inputCoder.getClass().getName());
}
Coder elemCoder = ((WindowedValueCoder) inputCoder).getValueCoder();
if (!(elemCoder instanceof KvCoder)) {
throw new Exception(
"Expected KvCoder for inputCoder, got: " + elemCoder.getClass().getName());
}
KvCoder kvCoder = (KvCoder) elemCoder;
boolean isStreamingPipeline = false;
if (options instanceof StreamingOptions) {
isStreamingPipeline = ((StreamingOptions) options).isStreaming();
}
KeyedCombineFn maybeMergingCombineFn = null;
if (combineFn != null) {
String phase = getString(cloudUserFn, PropertyNames.PHASE, CombinePhase.ALL);
Preconditions.checkArgument(
phase.equals(CombinePhase.ALL) || phase.equals(CombinePhase.MERGE),
"Unexpected phase: " + phase);
if (phase.equals(CombinePhase.MERGE)) {
maybeMergingCombineFn = new MergingKeyedCombineFn(combineFn);
} else {
maybeMergingCombineFn = combineFn;
}
}
DoFnInfoFactory fnFactory;
final DoFn groupAlsoByWindowsDoFn =
getGroupAlsoByWindowsDoFn(
isStreamingPipeline, windowingStrategy, kvCoder, maybeMergingCombineFn);
fnFactory =
new DoFnInfoFactory() {
@Override
public DoFnInfo createDoFnInfo() {
return new DoFnInfo(groupAlsoByWindowsDoFn, null);
}
};
return new GroupAlsoByWindowsParDoFn(
options, fnFactory, stepName, executionContext, addCounterMutator);
}