@Test
public void testInFlow() throws Exception {
FileSystem fs = FileSystem.get(new Configuration());
fs.delete(new Path(TMP_DIR), true);
Hfs input =
new Hfs(new SequenceFile(new Fields("constant", "first", "second")), TMP_DIR + "/inputs");
TupleEntryCollector collector = input.openForWrite(new HadoopFlowProcess());
collector.add(new Tuple("constant 1", "a", "b"));
collector.add(new Tuple("constant 2", "c", "d"));
collector.close();
Hfs output = new Hfs(new SequenceFile(new Fields("constant", "output")), TMP_DIR + "/outputs");
Pipe pipe =
Pump.prime()
.each(new Extrude("output"), "first", "second")
.retain("constant", "output")
.toPipe();
FlowDef flow = new FlowDef().addSource("input", input).addTailSink(pipe, output);
CascadingHelper.setTestMode();
CascadingHelper.get().getFlowConnector().connect(flow).complete();
List<String> results = new ArrayList<String>();
TupleEntryIterator iterator = output.openForRead(new HadoopFlowProcess());
while (iterator.hasNext()) {
TupleEntry tupleEntry = iterator.next();
results.add(tupleEntry.getString(0) + "\t" + tupleEntry.getString(1));
}
assertEquals(
Arrays.asList("constant 1\ta", "constant 1\tb", "constant 2\tc", "constant 2\td"), results);
}
static void setObject(TupleEntry entry, Comparable<?> field, Object object) {
if (object != null && entry.getFields().getType(field) instanceof CoercibleType) {
entry.setObject(field, object.toString());
} else {
entry.setObject(field, object);
}
}
@Override
public void receive(Duct previous, final Grouping<TupleEntry, TupleEntryIterator> grouping) {
try {
// we want to null out any 'values' before and after the iterator begins/ends
// this allows buffers to emit tuples before next() and when hasNext() return false;
final TupleEntry tupleEntry = grouping.joinIterator.getTupleEntry();
incomingEntry = tupleEntry;
// if Fields.NONE are declared on the CoGroup, we don't provide arguments, only the
// joinerClosure
if (!tupleEntry.getFields().isNone()) {
final Tuple valueNulledTuple = Tuples.setOnEmpty(tupleEntry, grouping.key);
tupleEntry.setTuple(valueNulledTuple);
operationCall.setArgumentsIterator(
createArgumentsIterator(grouping, tupleEntry, valueNulledTuple));
}
operationCall.setOutputCollector(outputCollector);
operationCall.setJoinerClosure(grouping.joinerClosure);
operationCall.setGroup(grouping.key);
buffer.operate(flowProcess, operationCall);
} catch (CascadingException exception) {
handleException(exception, argumentsEntry);
} catch (Throwable throwable) {
handleException(
new OperatorException(
every,
"operator Every failed executing operation: " + every.getOperation(),
throwable),
argumentsEntry);
}
}
private void writeObject(ObjectOutputStream s) throws IOException {
// Make sure anything in memory has been flushed to _tupleEntry
commit();
TupleEntry te = getTupleEntry();
s.writeObject(te.getFields());
s.writeObject(te.getTuple());
}
@Override
public void aggregate(FlowProcess flowProcess, AggregatorCall aggregatorCall) {
TupleEntry entry = aggregatorCall.getArguments();
if (entry.getInteger(0) < min) {
min = entry.getInteger(0);
}
if (entry.getInteger(1) > max) {
max = entry.getInteger(1);
}
}
/**
* Set the data container to be <tupleEntry>
*
* @param tupleEntry Data for the datum.
*/
protected void setTupleEntry(TupleEntry tupleEntry, boolean checkFields) {
if (checkFields && !tupleEntry.getFields().equals(getFields())) {
throw new IllegalArgumentException(
"Fields must be the same as for current value: "
+ tupleEntry.getFields()
+ "/"
+ _tupleEntry.getFields());
}
_tupleEntry = tupleEntry;
reset();
}
@Override
public void sink(
FlowProcess<? extends Properties> flowProcess, SinkCall<PrintWriter, OutputStream> sinkCall)
throws IOException {
TupleEntry tupleEntry = sinkCall.getOutgoingEntry();
Iterable<String> strings = tupleEntry.asIterableOf(String.class);
delimitedParser.joinLine(strings, sinkCall.getContext());
sinkCall.getContext().println();
}
public void testEvaluation() throws Exception {
CascadingRuleCompiler crc = new CascadingRuleCompiler(defaultConfiguration);
IDistributedCompiledRule dcr = crc.compile(rules.get(0));
dcr.evaluate(new EvaluationContext(1, 1, 1));
FlowAssembly fa = dcr.getFlowAssembly();
TupleEntryIterator tei = fa.openSink();
int size = 0;
while (tei.hasNext()) {
TupleEntry te = tei.next();
logger.info(te.getTuple().toString());
size++;
}
assertEquals(1, size);
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((_tupleEntry == null) ? 0 : _tupleEntry.hashCode());
return result;
}
public void setTuple(Tuple tuple) {
if (getFields().size() != tuple.size()) {
throw new IllegalArgumentException("Size of tuple doesn't match current fields");
}
_tupleEntry.setTuple(tuple);
reset();
}
@Override
public boolean equals(Object obj) {
if (this == obj) return true;
if (obj == null) return false;
if (getClass() != obj.getClass()) return false;
BaseDatum other = (BaseDatum) obj;
if (_tupleEntry == null) {
return other._tupleEntry == null;
} else if (!_tupleEntry.getFields().equals(other._tupleEntry.getFields())) {
return false;
} else if (!_tupleEntry.getTuple().equals(other._tupleEntry.getTuple())) {
return false;
}
return true;
}
/**
* @param flowProcess
* @param sinkCall
* @throws IOException
*/
@Override
public void sink(
FlowProcess<JobConf> flowProcess, SinkCall<BSONWritable[], OutputCollector> sinkCall)
throws IOException {
TupleEntry tupleEntry = sinkCall.getOutgoingEntry();
OutputCollector outputCollector = sinkCall.getOutput();
String keyFieldName = this.fieldMappings.get(this.keyColumnName);
Object key;
// if fieldMappings doesn't have keyColumnName ("_id") field, then use new ObjectId() as key
if (keyFieldName == null) {
key = new ObjectId();
} else {
key = tupleEntry.selectTuple(new Fields(keyFieldName)).get(0);
}
// Object key = tupleEntry.selectTuple(new
// Fields(this.fieldMappings.get(this.keyColumnName))).get(0);
BasicDBObject dbObject = new BasicDBObject();
for (String columnFieldName : columnFieldNames) {
String columnFieldMapping = fieldMappings.get(columnFieldName);
Object tupleEntryValue = null;
try {
if (columnFieldMapping != null) {
// columnFieldMapping is null if no corresponding field name defined in Mappings.
// only write the field value back to mongo if the field also defined in Mappings (ie. not
// null)
tupleEntryValue = tupleEntry.get(columnFieldMapping);
}
} catch (FieldsResolverException e) {
logger.error("Couldn't resolve field: {}", columnFieldName);
}
if (tupleEntryValue != null && columnFieldName != keyColumnName) {
// logger.info("Putting for output: {} {}", columnFieldName, tupleEntryValue);
dbObject.put(columnFieldName, tupleEntryValue);
}
}
logger.info("Putting key for output: {} {}", key, dbObject);
// outputCollector.collect(new ObjectId(), dbObject);
outputCollector.collect(key, dbObject);
}
public static <T> void populateOutputTupleEntry(
CombinerDefinition<T> definition, TupleEntry output, Tuple resultTuple) {
// set the ID so we can differentiate later
output.setRaw(MultiCombiner.ID_FIELD, definition.getId());
// our tuples are of the form groupFields+outputFields, set the TupleEntry fields appropriately
Fields groupFields = definition.getGroupFields();
int index = 0;
for (int i = 0; i < groupFields.size(); i++) {
output.setRaw(groupFields.get(i), resultTuple.getObject(index));
index++;
}
Fields outputFields = definition.getOutputFields();
for (int i = 0; i < outputFields.size(); i++) {
output.setRaw(outputFields.get(i), resultTuple.getObject(index));
index++;
}
}
static Tuple coerceToString(SinkCall<?, ?> sinkCall) {
TupleEntry entry = sinkCall.getOutgoingEntry();
Fields fields = entry.getFields();
Tuple tuple = entry.getTuple();
if (fields.hasTypes()) {
Type types[] = new Type[fields.size()];
for (int index = 0; index < fields.size(); index++) {
Type type = fields.getType(index);
if (type instanceof CoercibleType<?>) {
types[index] = String.class;
} else {
types[index] = type;
}
}
tuple = entry.getCoercedTuple(types);
}
return tuple;
}
@Override
public void operate(FlowProcess flowProcess, BufferCall<NullContext> bufferCall) {
TupleEntry group = bufferCall.getGroup();
String protocolAndDomain = group.getString(0);
LOGGER.info("Processing tuple group: " + group);
DiskQueue<GroupedUrlDatum> urls = new DiskQueue<GroupedUrlDatum>(MAX_URLS_IN_MEMORY);
Iterator<TupleEntry> values = bufferCall.getArgumentsIterator();
while (values.hasNext()) {
urls.add(new GroupedUrlDatum(new TupleEntry(values.next())));
}
try {
Runnable doRobots =
new ProcessRobotsTask(
protocolAndDomain,
_scorer,
urls,
_fetcher,
_parser,
bufferCall.getOutputCollector(),
_flowProcess);
_executor.execute(doRobots);
} catch (RejectedExecutionException e) {
// should never happen.
LOGGER.error("Robots handling pool rejected our request for " + protocolAndDomain);
_flowProcess.increment(FetchCounters.DOMAINS_REJECTED, 1);
_flowProcess.increment(FetchCounters.URLS_REJECTED, urls.size());
ProcessRobotsTask.emptyQueue(
urls, GroupingKey.DEFERRED_GROUPING_KEY, bufferCall.getOutputCollector(), flowProcess);
} catch (Throwable t) {
LOGGER.error(
"Caught an unexpected throwable - robots handling rejected our request for "
+ protocolAndDomain,
t);
_flowProcess.increment(FetchCounters.DOMAINS_REJECTED, 1);
_flowProcess.increment(FetchCounters.URLS_REJECTED, urls.size());
ProcessRobotsTask.emptyQueue(
urls, GroupingKey.DEFERRED_GROUPING_KEY, bufferCall.getOutputCollector(), flowProcess);
}
}
@Override
public void operate(FlowProcess flowProcess, BufferCall bufferCall) {
Iterator<TupleEntry> it = bufferCall.getArgumentsIterator();
HyperLogLog merged = null;
try {
while (it.hasNext()) {
TupleEntry tupleEntry = it.next();
byte[] serialized = (byte[]) tupleEntry.getObject(0);
HyperLogLog hll = HyperLogLog.Builder.build(serialized);
if (merged == null) {
merged = hll;
} else {
merged = (HyperLogLog) merged.merge(hll);
}
}
} catch (Exception e) {
throw new RuntimeException(e);
}
}
@Test
public void testTempPath() throws Exception {
BasePlatform platform = new HadoopPlatform(HadoopPlatformTest.class);
BasePath tempDir = platform.getTempDir();
// Verify we can write and then read
BasePath testDir = platform.makePath(tempDir, UUID.randomUUID().toString());
Scheme scheme = platform.makeBinaryScheme(new Fields("name", "age"));
Tap tap = platform.makeTap(scheme, testDir);
TupleEntryCollector writer = tap.openForWrite(platform.makeFlowProcess());
writer.add(new Tuple("ken", 37));
writer.close();
TupleEntryIterator iter = tap.openForRead(platform.makeFlowProcess());
assertTrue(iter.hasNext());
TupleEntry te = iter.next();
assertEquals("ken", te.getString("name"));
assertFalse(iter.hasNext());
iter.close();
}
public void operate(FlowProcess flowProcess, BufferCall<TupleEntryCollector> bufferCall) {
if (bufferCall.getJoinerClosure() != null)
throw new IllegalStateException("joiner closure should be null");
if (insertHeader) bufferCall.getOutputCollector().add(new Tuple(value));
Iterator<TupleEntry> iterator = bufferCall.getArgumentsIterator();
while (iterator.hasNext()) {
TupleEntry arguments = iterator.next(); // must be called
if (expectedSize != -1 && arguments.size() != expectedSize)
throw new RuntimeException("arguments wrong size");
if (path != null) bufferCall.getContext().add(arguments);
if (value != null) bufferCall.getOutputCollector().add(new Tuple(value));
else bufferCall.getOutputCollector().add(arguments); // copy
}
if (insertFooter) bufferCall.getOutputCollector().add(new Tuple(value));
iterator.hasNext(); // regression
}
/**
* Throws a StackException to flag a hard failure
*
* @param tupleEntry
*/
private void operateSink(TupleEntry tupleEntry) {
try {
if (outputCollector != null) {
getFlowProcess().keepAlive();
((Tap) getFlowElement()).sink(tupleEntry, outputCollector);
} else {
((Tap) getFlowElement()).sink(tupleEntry, lastOutput);
}
getFlowProcess().increment(StepCounters.Tuples_Written, 1);
} catch (OutOfMemoryError error) {
throw new StackException("out of memory, try increasing task memory allocation", error);
} catch (IOException exception) {
throw new StackException("io exception writing to tap: " + sink.toString(), exception);
} catch (TapException exception) {
throw new StackException("exception writing to tap: " + sink.toString(), exception);
} catch (Throwable throwable) {
if (throwable instanceof CascadingException) throw (CascadingException) throwable;
throw new FlowException("internal error: " + tupleEntry.getTuple().print(), throwable);
}
}
protected void performOperation(Tuple[] context, TupleEntry entry) {
if (context[0] == null) context[0] = new Tuple(entry.getTuple());
}
public Fields getFields() {
return _tupleEntry.getFields();
}
protected Tuple getValue(TupleEntry tupleEntry) {
return tupleEntry.selectTuple(getValueFields());
}
public UrlDatum(TupleEntry tupleEntry) {
super(tupleEntry);
validateFields(tupleEntry.getFields(), FIELDS);
}
protected void validateFields(TupleEntry tupleEntry, Fields myFields) {
if (!tupleEntry.getFields().contains(myFields)) {
throw new IllegalArgumentException("Fields passed to constructor don't contain " + myFields);
}
}
static void setObject(TupleEntry entry, Comparable<?> field, Object object) {
entry.setObject(field, object);
}
