@SuppressWarnings("unchecked")
@Test
public void testFoldLeftValueComparator() {
List<Tuple2<Integer, TimeValue>> pairs =
Lists.newArrayList(
tuple2(5, new TimeValue(2, 0.5)),
tuple2(1, new TimeValue(1, 1.2)),
tuple2(5, new TimeValue(1, 1.0)),
tuple2(1, new TimeValue(2, 2.0)),
tuple2(1, new TimeValue(3, 3.0)));
JavaPairRDD<Integer, TimeValue> p = jsc().parallelizePairs(pairs);
GroupSorted<Integer, TimeValue> gs =
new GroupSorted(p, new HashPartitioner(2), new TimeValueComparator());
JavaPairRDD<Integer, Double> emas =
gs.foldLeftByKey(
0.0,
new Function2<Double, TimeValue, Double>() {
public Double call(Double acc, TimeValue tv) {
return 0.8 * acc + 0.2 * tv.getValue();
}
});
System.out.println(ImmutableSet.copyOf(emas.collect()));
Assert.assertTrue(
ImmutableSet.copyOf(emas.collect())
.equals(ImmutableSet.of(tuple2(1, 1.0736), tuple2(5, 0.26))));
}
@SuppressWarnings("serial")
@Override
public SortedCounts<String> execute(final JavaSparkContext spark) {
final JavaRDD<String> textFile = spark.textFile(inputFile);
final JavaRDD<String> words =
textFile.flatMap(
new FlatMapFunction<String, String>() {
@Override
public Iterable<String> call(final String rawJSON) throws TwitterException {
final Status tweet = TwitterObjectFactory.createStatus(rawJSON);
String text = tweet.getText();
return Arrays.asList(text.split(" "));
}
});
final JavaPairRDD<String, Integer> pairs =
words.mapToPair(
new PairFunction<String, String, Integer>() {
@Override
public Tuple2<String, Integer> call(final String s) {
return new Tuple2<String, Integer>(s.toLowerCase(), 1);
}
});
final JavaPairRDD<String, Integer> counts =
pairs.reduceByKey(
new Function2<Integer, Integer, Integer>() {
@Override
public Integer call(final Integer a, final Integer b) {
return a + b;
}
});
return SortedCounts.create(counts);
}
/**
* This method builds a decision tree model
*
* @param sparkContext JavaSparkContext initialized with the application
* @param modelID Model ID
* @param trainingData Training data as a JavaRDD of LabeledPoints
* @param testingData Testing data as a JavaRDD of LabeledPoints
* @param workflow Machine learning workflow
* @param mlModel Deployable machine learning model
* @throws MLModelBuilderException
*/
private ModelSummary buildDecisionTreeModel(
JavaSparkContext sparkContext,
long modelID,
JavaRDD<LabeledPoint> trainingData,
JavaRDD<LabeledPoint> testingData,
Workflow workflow,
MLModel mlModel,
SortedMap<Integer, String> includedFeatures,
Map<Integer, Integer> categoricalFeatureInfo)
throws MLModelBuilderException {
try {
Map<String, String> hyperParameters = workflow.getHyperParameters();
DecisionTree decisionTree = new DecisionTree();
DecisionTreeModel decisionTreeModel =
decisionTree.train(
trainingData,
getNoOfClasses(mlModel),
categoricalFeatureInfo,
hyperParameters.get(MLConstants.IMPURITY),
Integer.parseInt(hyperParameters.get(MLConstants.MAX_DEPTH)),
Integer.parseInt(hyperParameters.get(MLConstants.MAX_BINS)));
// remove from cache
trainingData.unpersist();
// add test data to cache
testingData.cache();
JavaPairRDD<Double, Double> predictionsAndLabels =
decisionTree.test(decisionTreeModel, testingData).cache();
ClassClassificationAndRegressionModelSummary classClassificationAndRegressionModelSummary =
SparkModelUtils.getClassClassificationModelSummary(
sparkContext, testingData, predictionsAndLabels);
// remove from cache
testingData.unpersist();
mlModel.setModel(new MLDecisionTreeModel(decisionTreeModel));
classClassificationAndRegressionModelSummary.setFeatures(
includedFeatures.values().toArray(new String[0]));
classClassificationAndRegressionModelSummary.setAlgorithm(
SUPERVISED_ALGORITHM.DECISION_TREE.toString());
MulticlassMetrics multiclassMetrics =
getMulticlassMetrics(sparkContext, predictionsAndLabels);
predictionsAndLabels.unpersist();
classClassificationAndRegressionModelSummary.setMulticlassConfusionMatrix(
getMulticlassConfusionMatrix(multiclassMetrics, mlModel));
Double modelAccuracy = getModelAccuracy(multiclassMetrics);
classClassificationAndRegressionModelSummary.setModelAccuracy(modelAccuracy);
classClassificationAndRegressionModelSummary.setDatasetVersion(workflow.getDatasetVersion());
return classClassificationAndRegressionModelSummary;
} catch (Exception e) {
throw new MLModelBuilderException(
"An error occurred while building decision tree model: " + e.getMessage(), e);
}
}
@Override
public void processInstruction(ExecutionContext ec)
throws DMLRuntimeException, DMLUnsupportedOperationException {
SparkExecutionContext sec = (SparkExecutionContext) ec;
// get rdd and broadcast inputs
JavaPairRDD<MatrixIndexes, MatrixBlock> inX =
sec.getBinaryBlockRDDHandleForVariable(_input1.getName());
PartitionedBroadcastMatrix inV = sec.getBroadcastForVariable(_input2.getName());
// execute mapmmchain (guaranteed to have single output block)
MatrixBlock out = null;
if (_chainType == ChainType.XtXv) {
RDDMapMMChainFunction fmmc = new RDDMapMMChainFunction(inV);
JavaPairRDD<MatrixIndexes, MatrixBlock> tmp = inX.mapValues(fmmc);
out = RDDAggregateUtils.sumStable(tmp);
} else { // ChainType.XtwXv
PartitionedBroadcastMatrix inW = sec.getBroadcastForVariable(_input3.getName());
RDDMapMMChainFunction2 fmmc = new RDDMapMMChainFunction2(inV, inW);
JavaPairRDD<MatrixIndexes, MatrixBlock> tmp = inX.mapToPair(fmmc);
out = RDDAggregateUtils.sumStable(tmp);
}
// put output block into symbol table (no lineage because single block)
// this also includes implicit maintenance of matrix characteristics
sec.setMatrixOutput(_output.getName(), out);
}
@Override
public void processInstruction(ExecutionContext ec)
throws DMLRuntimeException, DMLUnsupportedOperationException {
SparkExecutionContext sec = (SparkExecutionContext) ec;
String rddVar = (_type == CacheType.LEFT) ? input2.getName() : input1.getName();
String bcastVar = (_type == CacheType.LEFT) ? input1.getName() : input2.getName();
MatrixCharacteristics mc = sec.getMatrixCharacteristics(output.getName());
long rlen =
sec.getScalarInput(_nrow.getName(), _nrow.getValueType(), _nrow.isLiteral()).getLongValue();
// get inputs
JavaPairRDD<MatrixIndexes, MatrixBlock> in1 = sec.getBinaryBlockRDDHandleForVariable(rddVar);
PartitionedBroadcastMatrix in2 = sec.getBroadcastForVariable(bcastVar);
// execute pmm instruction
JavaPairRDD<MatrixIndexes, MatrixBlock> out =
in1.flatMapToPair(new RDDPMMFunction(_type, in2, rlen, mc.getRowsPerBlock()));
out = RDDAggregateUtils.sumByKeyStable(out);
// put output RDD handle into symbol table
sec.setRDDHandleForVariable(output.getName(), out);
sec.addLineageRDD(output.getName(), rddVar);
sec.addLineageBroadcast(output.getName(), bcastVar);
// update output statistics if not inferred
updateBinaryMMOutputMatrixCharacteristics(sec, false);
}
@Test
public void wrapPairRDDFakeCtTest() {
JavaInteropTestHelper helper = new JavaInteropTestHelper(sc());
JavaInterop ji = new JavaInterop();
RDD<Tuple2<String, Object>> rdd = helper.generateMiniPairRDD();
JavaPairRDD prdd = ji.wrapPairRDDFakeCt(rdd);
List<Tuple2<String, Long>> expected = Arrays.asList(new Tuple2<String, Long>("panda", 12L));
assertEquals(expected, prdd.collect());
}
/**
* @param pfid
* @param program
* @param taskFile
* @param resultFile
* @param enableCPCaching
* @param mode
* @param numMappers
* @param replication
* @return
* @throws DMLRuntimeException
* @throws DMLUnsupportedOperationException
*/
public static RemoteParForJobReturn runJob(
long pfid,
String itervar,
String matrixvar,
String program,
String resultFile,
MatrixObject input,
ExecutionContext ec,
PDataPartitionFormat dpf,
OutputInfo oi,
boolean tSparseCol, // config params
boolean enableCPCaching,
int numReducers) // opt params
throws DMLRuntimeException, DMLUnsupportedOperationException {
String jobname = "ParFor-DPESP";
long t0 = DMLScript.STATISTICS ? System.nanoTime() : 0;
SparkExecutionContext sec = (SparkExecutionContext) ec;
JavaSparkContext sc = sec.getSparkContext();
// prepare input parameters
MatrixDimensionsMetaData md = (MatrixDimensionsMetaData) input.getMetaData();
MatrixCharacteristics mc = md.getMatrixCharacteristics();
InputInfo ii = InputInfo.BinaryBlockInputInfo;
// initialize accumulators for tasks/iterations
Accumulator<Integer> aTasks = sc.accumulator(0);
Accumulator<Integer> aIters = sc.accumulator(0);
JavaPairRDD<MatrixIndexes, MatrixBlock> in = sec.getBinaryBlockRDDHandleForVariable(matrixvar);
DataPartitionerRemoteSparkMapper dpfun = new DataPartitionerRemoteSparkMapper(mc, ii, oi, dpf);
RemoteDPParForSparkWorker efun =
new RemoteDPParForSparkWorker(
program, matrixvar, itervar, enableCPCaching, mc, tSparseCol, dpf, oi, aTasks, aIters);
List<Tuple2<Long, String>> out =
in.flatMapToPair(dpfun) // partition the input blocks
.groupByKey(numReducers) // group partition blocks
.mapPartitionsToPair(efun) // execute parfor tasks, incl cleanup
.collect(); // get output handles
// de-serialize results
LocalVariableMap[] results = RemoteParForUtils.getResults(out, LOG);
int numTasks = aTasks.value(); // get accumulator value
int numIters = aIters.value(); // get accumulator value
// create output symbol table entries
RemoteParForJobReturn ret = new RemoteParForJobReturn(true, numTasks, numIters, results);
// maintain statistics
Statistics.incrementNoOfCompiledSPInst();
Statistics.incrementNoOfExecutedSPInst();
if (DMLScript.STATISTICS) {
Statistics.maintainCPHeavyHitters(jobname, System.nanoTime() - t0);
}
return ret;
}
public static void main(String[] args) {
JavaSparkContext sc = new JavaSparkContext("local", "JavaAPISuite");
JavaRDD<String> lines = sc.textFile("log.txt");
JavaRDD<String> words = lines.flatMap(line -> Arrays.asList(line.split(" ")));
JavaPairRDD<String, Integer> counts =
words.mapToPair(w -> new Tuple2<String, Integer>(w, 1)).reduceByKey((x, y) -> x + y);
counts.collect().forEach(t -> System.out.println("Key:" + t._1() + " Value:" + t._2()));
}
/**
* Class used to analyze themes life cycle.
*
* @param hmmInput The hmmInput from which is going to be used the background model, the lexicon
* and the wordStream. Themes must be added before any analytics can be done.
*/
public LifeCycleAnalyserSpark(HmmInputFromParser hmmInput) {
this.wordStream = hmmInput.wordStream;
this.lexicon = hmmInput.lexicon;
this.lexiconAsMap = lexicon.collectAsMap();
getInvertedLexicon();
numberOfThemes = 0L;
numberOfWords = lexicon.count();
// themes = new ArrayList<double[]>();
setBackgroundModelAsThemebyId(hmmInput.backgroundModelById);
}
/**
* This method builds a naive bayes model
*
* @param sparkContext JavaSparkContext initialized with the application
* @param modelID Model ID
* @param trainingData Training data as a JavaRDD of LabeledPoints
* @param testingData Testing data as a JavaRDD of LabeledPoints
* @param workflow Machine learning workflow
* @param mlModel Deployable machine learning model
* @throws MLModelBuilderException
*/
private ModelSummary buildNaiveBayesModel(
JavaSparkContext sparkContext,
long modelID,
JavaRDD<LabeledPoint> trainingData,
JavaRDD<LabeledPoint> testingData,
Workflow workflow,
MLModel mlModel,
SortedMap<Integer, String> includedFeatures)
throws MLModelBuilderException {
try {
Map<String, String> hyperParameters = workflow.getHyperParameters();
NaiveBayesClassifier naiveBayesClassifier = new NaiveBayesClassifier();
NaiveBayesModel naiveBayesModel =
naiveBayesClassifier.train(
trainingData, Double.parseDouble(hyperParameters.get(MLConstants.LAMBDA)));
// remove from cache
trainingData.unpersist();
// add test data to cache
testingData.cache();
JavaPairRDD<Double, Double> predictionsAndLabels =
naiveBayesClassifier.test(naiveBayesModel, testingData).cache();
ClassClassificationAndRegressionModelSummary classClassificationAndRegressionModelSummary =
SparkModelUtils.getClassClassificationModelSummary(
sparkContext, testingData, predictionsAndLabels);
// remove from cache
testingData.unpersist();
mlModel.setModel(new MLClassificationModel(naiveBayesModel));
classClassificationAndRegressionModelSummary.setFeatures(
includedFeatures.values().toArray(new String[0]));
classClassificationAndRegressionModelSummary.setAlgorithm(
SUPERVISED_ALGORITHM.NAIVE_BAYES.toString());
MulticlassMetrics multiclassMetrics =
getMulticlassMetrics(sparkContext, predictionsAndLabels);
predictionsAndLabels.unpersist();
classClassificationAndRegressionModelSummary.setMulticlassConfusionMatrix(
getMulticlassConfusionMatrix(multiclassMetrics, mlModel));
Double modelAccuracy = getModelAccuracy(multiclassMetrics);
classClassificationAndRegressionModelSummary.setModelAccuracy(modelAccuracy);
classClassificationAndRegressionModelSummary.setDatasetVersion(workflow.getDatasetVersion());
return classClassificationAndRegressionModelSummary;
} catch (Exception e) {
throw new MLModelBuilderException(
"An error occurred while building naive bayes model: " + e.getMessage(), e);
}
}
@SuppressWarnings("unchecked")
@Test
public void testGroupSortNoEffect() {
List<Tuple2<Integer, Integer>> pairs =
Lists.newArrayList(tuple2(1, 2), tuple2(2, 3), tuple2(1, 3), tuple2(3, 1), tuple2(2, 1));
JavaPairRDD<Integer, Integer> p = jsc().parallelizePairs(pairs);
GroupSorted<Integer, Integer> gs =
new GroupSorted(p, new HashPartitioner(2), Ordering.natural());
GroupSorted<Integer, Integer> gs1 =
new GroupSorted(gs, new HashPartitioner(2), Ordering.natural());
Assert.assertTrue(JavaPairRDD.toRDD(gs) == JavaPairRDD.toRDD(gs1));
}
public static JavaRDD<IAtomContainer> sdfFilesToMols(String path, JavaSparkContext ctx) {
JavaPairRDD<String, String> sdfFiles = ctx.wholeTextFiles(path);
FlatMapFunction<Tuple2<String, String>, IAtomContainer> sdfBlockBuilder =
new FlatMapFunction<Tuple2<String, String>, IAtomContainer>() {
public Iterable<IAtomContainer> call(Tuple2<String, String> sdfFile) throws Exception {
return SDFUtils.parseSDF(sdfFile._2());
}
};
JavaRDD<IAtomContainer> molecules = sdfFiles.flatMap(sdfBlockBuilder);
return molecules;
}
private void setBackgroundModelAsThemebyId(JavaPairRDD<Long, Double> backgroundModelById) {
List<Tuple2<Long, Double>> bgCollected = backgroundModelById.collect();
bgAsArray = new double[(int) numberOfWords];
for (Tuple2<Long, Double> tuple : bgCollected) {
bgAsArray[tuple._1.intValue()] = tuple._2;
}
}
public static void main(String[] args) throws Exception {
if (args.length < 2) {
System.err.println("Usage: JavaWordCount <master> <file>");
System.exit(1);
}
JavaSparkContext ctx =
new JavaSparkContext(
args[0],
"JavaWordCount",
System.getenv("SPARK_HOME"),
JavaSparkContext.jarOfClass(JavaWordCount.class));
JavaRDD<String> lines = ctx.textFile(args[1], 1);
JavaRDD<String> words =
lines.flatMap(
new FlatMapFunction<String, String>() {
@Override
public Iterable<String> call(String s) {
return Arrays.asList(SPACE.split(s));
}
});
JavaPairRDD<String, Integer> ones =
words.mapToPair(
new PairFunction<String, String, Integer>() {
@Override
public Tuple2<String, Integer> call(String s) {
return new Tuple2<String, Integer>(s, 1);
}
});
JavaPairRDD<String, Integer> counts =
ones.reduceByKey(
new Function2<Integer, Integer, Integer>() {
@Override
public Integer call(Integer i1, Integer i2) {
return i1 + i2;
}
});
List<Tuple2<String, Integer>> output = counts.collect();
for (Tuple2<?, ?> tuple : output) {
System.out.println(tuple._1 + ": " + tuple._2);
}
System.exit(0);
}
public static void main(String[] args) throws Exception {
if (args.length != 2) {
System.err.println("Usage: JavaWordCount <input_file> <output_file>");
System.exit(1);
}
SparkConf sparkConf = new SparkConf().setAppName("JavaWordCount");
JavaSparkContext ctx = new JavaSparkContext(sparkConf);
JavaRDD<String> lines = ctx.textFile(args[0], 1);
JavaRDD<String> words =
lines.flatMap(
new FlatMapFunction<String, String>() {
@Override
public Iterator<String> call(String s) {
return Arrays.asList(SPACE.split(s)).iterator();
}
});
JavaPairRDD<String, Integer> ones =
words.mapToPair(
new PairFunction<String, String, Integer>() {
@Override
public Tuple2<String, Integer> call(String s) {
return new Tuple2<String, Integer>(s, 1);
}
});
JavaPairRDD<String, Integer> counts =
ones.reduceByKey(
new Function2<Integer, Integer, Integer>() {
@Override
public Integer call(Integer i1, Integer i2) {
return i1 + i2;
}
});
/*
List<Tuple2<String, Integer>> output = counts.collect();
for (Tuple2<?,?> tuple : output) {
System.out.println(tuple._1() + ": " + tuple._2());
}
*/
counts.saveAsTextFile(args[1]);
ctx.stop();
}
@Test
@SuppressWarnings("unchecked")
public void testJavaPairRDDFunctions() throws Exception {
JavaPairRDD<String, Integer> mockPairRDD = mock(JavaPairRDD.class);
RDD<Tuple2<String, Integer>> mockTuple2RDD = mock(RDD.class);
when(mockPairRDD.rdd()).thenReturn(mockTuple2RDD);
GemFireJavaPairRDDFunctions wrapper = javaFunctions(mockPairRDD);
assertTrue(mockTuple2RDD == wrapper.rddf.rdd());
Tuple3<SparkContext, GemFireConnectionConf, GemFireConnection> tuple3 = createCommonMocks();
when(mockTuple2RDD.sparkContext()).thenReturn(tuple3._1());
String regionPath = "testregion";
wrapper.saveToGemfire(regionPath, tuple3._2());
verify(mockTuple2RDD, times(1)).sparkContext();
verify(tuple3._1(), times(1))
.runJob(eq(mockTuple2RDD), any(Function2.class), any(ClassTag.class));
}
@Override
public void processInstruction(ExecutionContext ec)
throws DMLRuntimeException, DMLUnsupportedOperationException {
SparkExecutionContext sec = (SparkExecutionContext) ec;
// get input
JavaPairRDD<MatrixIndexes, MatrixBlock> in =
sec.getBinaryBlockRDDHandleForVariable(input1.getName());
// execute unary builtin operation
UnaryOperator uop = (UnaryOperator) _optr;
JavaPairRDD<MatrixIndexes, MatrixBlock> out = in.mapValues(new RDDMatrixBuiltinUnaryOp(uop));
// set output RDD
updateUnaryOutputMatrixCharacteristics(sec);
sec.setRDDHandleForVariable(output.getName(), out);
sec.addLineageRDD(output.getName(), input1.getName());
}
public static void main(String[] args) throws Exception {
if (args.length < 1) {
System.err.println("Usage: JavaWordCount <file>");
System.exit(1);
}
SparkSession spark = SparkSession.builder().appName("JavaWordCount").getOrCreate();
JavaRDD<String> lines = spark.read().text(args[0]).javaRDD();
JavaRDD<String> words =
lines.flatMap(
new FlatMapFunction<String, String>() {
@Override
public Iterator<String> call(String s) {
return Arrays.asList(SPACE.split(s)).iterator();
}
});
JavaPairRDD<String, Integer> ones =
words.mapToPair(
new PairFunction<String, String, Integer>() {
@Override
public Tuple2<String, Integer> call(String s) {
return new Tuple2<>(s, 1);
}
});
JavaPairRDD<String, Integer> counts =
ones.reduceByKey(
new Function2<Integer, Integer, Integer>() {
@Override
public Integer call(Integer i1, Integer i2) {
return i1 + i2;
}
});
List<Tuple2<String, Integer>> output = counts.collect();
for (Tuple2<?, ?> tuple : output) {
System.out.println(tuple._1() + ": " + tuple._2());
}
spark.stop();
}
public static <T, N extends Number> SortedCounts<T> create(final JavaPairRDD<T, N> rdd) {
final SortedSet<Entry<T>> sortedEntries = new TreeSet<>();
for (final Tuple2<T, N> tuple : rdd.collect()) {
sortedEntries.add(new Entry<T>(tuple._2.longValue(), tuple._1));
}
final SortedCounts<T> result = new SortedCounts<T>(sortedEntries);
return result;
}
public static void main(String[] args) {
if (args.length < 2) {
System.err.println("Usage: NaiveBayesExample <training_data> <test_data>");
System.exit(1);
}
String training_data_path = args[0];
// https://class.coursera.org/cloudapplications-001/forum/thread?thread_id=1387
// String test_data_path = args[0];
String test_data_path = args[1];
SparkConf sparkConf = new SparkConf().setAppName("NaiveBayesExample");
JavaSparkContext sc = new JavaSparkContext(sparkConf);
JavaRDD<LabeledPoint> train = sc.textFile(training_data_path).map(new DataToPoint());
// JavaRDD<LabeledPoint> test = sc.textFile(training_data_path).map(new DataToPoint());
JavaRDD<LabeledPoint> test = sc.textFile(test_data_path).map(new DataToPoint());
final NaiveBayesModel model = NaiveBayes.train(train.rdd(), 1.0);
JavaPairRDD<Double, Double> predictionAndLabel =
test.mapToPair(
new PairFunction<LabeledPoint, Double, Double>() {
public Tuple2<Double, Double> call(LabeledPoint p) {
return new Tuple2<Double, Double>(model.predict(p.features()), p.label());
}
});
double accuracy =
predictionAndLabel
.filter(
new Function<Tuple2<Double, Double>, Boolean>() {
public Boolean call(Tuple2<Double, Double> pl) {
return pl._1().equals(pl._2());
}
})
.count()
/ (double) test.count();
System.out.println(accuracy);
sc.stop();
}
public static void main(String[] args) {
SparkConf conf = new SparkConf().setMaster("local").setAppName("My App");
JavaSparkContext sc = new JavaSparkContext(conf);
JavaRDD<String> lines = sc.textFile("src/main/resources/data.txt");
@SuppressWarnings("serial")
JavaRDD<String> words =
lines.flatMap(
new FlatMapFunction<String, String>() {
@Override
public Iterable<String> call(String s) {
return Arrays.asList(s.split(" "));
}
});
@SuppressWarnings("serial")
JavaPairRDD<String, Integer> ones =
words.mapToPair(
new PairFunction<String, String, Integer>() {
@Override
public Tuple2<String, Integer> call(String s) {
return new Tuple2<String, Integer>(s, 1);
}
});
@SuppressWarnings("serial")
JavaPairRDD<String, Integer> counts =
ones.reduceByKey(
new Function2<Integer, Integer, Integer>() {
@Override
public Integer call(Integer i1, Integer i2) {
return i1 + i2;
}
});
List<Tuple2<String, Integer>> output = counts.collect();
for (Tuple2<?, ?> tuple : output) {
System.out.println(tuple._1() + "-> " + tuple._2());
}
sc.close();
}
@Test
public void matchCitations() {
// given
when(inputCitationReader.readCitations(sparkContext, "/input/cit/path")).thenReturn(citations);
when(inputCitationConverter.convertCitations(citations)).thenReturn(convertedCitations);
when(convertedCitations.partitions()).thenReturn(Lists.newArrayList(16));
when(convertedCitations.partitionBy(any())).thenReturn(repartitionedCitations);
when(inputDocumentReader.readDocuments(sparkContext, "/input/doc/path")).thenReturn(documents);
when(inputDocumentConverter.convertDocuments(documents)).thenReturn(convertedDocuments);
when(convertedDocuments.partitions()).thenReturn(Lists.newArrayList(12));
when(convertedDocuments.partitionBy(any())).thenReturn(repartitionedDocuments);
when(coreCitationMatchingService.matchCitations(repartitionedCitations, repartitionedDocuments))
.thenReturn(matched);
when(outputConverter.convertMatchedCitations(matched)).thenReturn(convertedMatched);
// execute
citationMatchingService.matchCitations(
sparkContext, "/input/cit/path", "/input/doc/path", "/output/path");
// assert
verify(inputCitationReader).readCitations(sparkContext, "/input/cit/path");
verify(inputCitationConverter).convertCitations(citations);
verify(convertedCitations).partitionBy(citationsPartitioner.capture());
assertPartitioner(citationsPartitioner.getValue(), 5);
verify(inputDocumentReader).readDocuments(sparkContext, "/input/doc/path");
verify(inputDocumentConverter).convertDocuments(documents);
verify(convertedDocuments).partitionBy(documentsPartitioner.capture());
assertPartitioner(documentsPartitioner.getValue(), 5);
verify(coreCitationMatchingService)
.matchCitations(repartitionedCitations, repartitionedDocuments);
verify(outputConverter).convertMatchedCitations(matched);
verify(outputWriter).writeMatchedCitations(convertedMatched, "/output/path");
}
@SuppressWarnings("unchecked")
@Test
public void testMapStreamByKeyValueComparator() {
List<Tuple2<String, Integer>> pairs =
Lists.newArrayList(
tuple2("a", 1), tuple2("b", 10), tuple2("a", 3), tuple2("b", 1), tuple2("c", 5));
JavaPairRDD<String, Integer> p = jsc().parallelizePairs(pairs);
GroupSorted<String, Integer> gs =
new GroupSorted(p, new HashPartitioner(2), Ordering.natural().reverse());
JavaPairRDD<String, Integer> max =
gs.mapStreamByKey(
new Function<Iterator<Integer>, Iterator<Integer>>() {
public Iterator<Integer> call(Iterator<Integer> it) {
return Iterators.singletonIterator(it.next());
}
});
Assert.assertTrue(
ImmutableSet.copyOf(max.collect())
.equals(ImmutableSet.of(tuple2("a", 3), tuple2("b", 10), tuple2("c", 5))));
}
@Override
public void publishAdditionalModelData(
JavaSparkContext sparkContext,
PMML pmml,
JavaRDD<String> newData,
JavaRDD<String> pastData,
Path modelParentPath,
QueueProducer<String, String> modelUpdateQueue) {
JavaRDD<String> allData = pastData == null ? newData : newData.union(pastData);
log.info("Sending user / X data as model updates");
String xPathString = PMMLUtils.getExtensionValue(pmml, "X");
JavaPairRDD<Integer, double[]> userRDD =
fromRDD(readFeaturesRDD(sparkContext, new Path(modelParentPath, xPathString)));
if (noKnownItems) {
userRDD.foreach(new EnqueueFeatureVecsFn("X", modelUpdateQueue));
} else {
log.info("Sending known item data with model updates");
JavaPairRDD<Integer, Collection<Integer>> knownItems = knownsRDD(allData, true);
userRDD
.join(knownItems)
.foreach(new EnqueueFeatureVecsAndKnownItemsFn("X", modelUpdateQueue));
}
log.info("Sending item / Y data as model updates");
String yPathString = PMMLUtils.getExtensionValue(pmml, "Y");
JavaPairRDD<Integer, double[]> productRDD =
fromRDD(readFeaturesRDD(sparkContext, new Path(modelParentPath, yPathString)));
// For now, there is no use in sending known users for each item
// if (noKnownItems) {
productRDD.foreach(new EnqueueFeatureVecsFn("Y", modelUpdateQueue));
// } else {
// log.info("Sending known user data with model updates");
// JavaPairRDD<Integer,Collection<Integer>> knownUsers = knownsRDD(allData, false);
// productRDD.join(knownUsers).foreach(
// new EnqueueFeatureVecsAndKnownItemsFn("Y", modelUpdateQueue));
// }
}
public static void wordCountJava8(String filename) {
// Define a configuration to use to interact with Spark
SparkConf conf = new SparkConf().setMaster("local").setAppName("Work Count App");
// Create a Java version of the Spark Context from the configuration
JavaSparkContext sc = new JavaSparkContext(conf);
// Load the input data, which is a text file read from the command line
JavaRDD<String> input = sc.textFile(filename);
// Java 8 with lambdas: split the input string into words
JavaRDD<String> words = input.flatMap(s -> Arrays.asList(s.split(" ")));
// Java 8 with lambdas: transform the collection of words into pairs (word and 1) and then count
// them
JavaPairRDD<String, Integer> counts =
words.mapToPair(t -> new Tuple2(t, 1)).reduceByKey((x, y) -> (int) x + (int) y);
// Save the word count back out to a text file, causing evaluation.
counts.saveAsTextFile("output");
}
private static void printKeyValStat(JavaRDD<LabeledPoint> rdd) {
JavaPairRDD<Double, Integer> mapRDD =
rdd.mapToPair(
new PairFunction<LabeledPoint, Double, Integer>() {
public Tuple2<Double, Integer> call(LabeledPoint point) throws Exception {
return new Tuple2<Double, Integer>(point.label(), 1);
}
});
Map<Double, Iterable<Integer>> map = mapRDD.groupByKey().collectAsMap();
System.out.printf("Number of records for labels: ");
for (Double key : map.keySet()) {
int count = 0;
for (int val : map.get(key)) {
count += val;
}
System.out.printf(" %f::%d \t ", key, count);
}
System.out.printf("\n");
}
private void getInvertedLexicon() {
this.invertedLexicon =
lexicon.mapToPair(
new PairFunction<Tuple2<String, Long>, Long, String>() {
private static final long serialVersionUID = 1L;
@Override
public Tuple2<Long, String> call(Tuple2<String, Long> wordEntry) throws Exception {
return new Tuple2<Long, String>(wordEntry._2, wordEntry._1);
}
});
}
public static void main(String[] args) {
SparkConf sparkconf =
new SparkConf()
.setAppName("Simple Application")
.setMaster("spark://1.245.77.10:7077")
.set(
"spark.driver.extraClassPath",
"E:/installprogram/spark-1.5.2-bin-hadoop2.4/libthirdparty/*")
.set(
"spark.executor.extraClassPath",
"E:/installprogram/spark-1.5.2-bin-hadoop2.4/libthirdparty/*")
.set("fs.default.name", "file:///");
JavaSparkContext sc = new JavaSparkContext(sparkconf);
Configuration hadoopConfig = sc.hadoopConfiguration();
hadoopConfig.set("fs.hdfs.impl", org.apache.hadoop.hdfs.DistributedFileSystem.class.getName());
hadoopConfig.set("fs.file.impl", org.apache.hadoop.fs.LocalFileSystem.class.getName());
// sc.addJar("e:/installprogram/spark-1.5.2-bin-hadoop2.4/libthirdparty/jmatrw-0.2.jar");
// sc.addJar("e:/installprogram/spark-1.5.2-bin-hadoop2.4/libthirdparty/jmatrw4spark-0.2.jar");
/*JavaRDD<Double> matrdd2 = sc.parallelize(Arrays.asList(1.0, 3.0, 2.0));
System.out.println("Start counting parallelize...");
long values = matrdd2.count();
System.out.println("Value count of parallelize is " + values);*/
JavaPairRDD<Long, Double> matrdd =
sc.newAPIHadoopFile(
"e:/tmp/vecRow03_x256.mat",
JMATFileInputFormat.class,
Long.class,
Double.class,
hadoopConfig);
System.out.println("Start job...");
long values = matrdd.count();
System.out.println("Value count of hadoop is " + values);
sc.stop();
sc.close();
}
public static void main(String[] args) {
if (args.length == 0) {
System.err.println("Usage: Main <file>");
System.exit(1);
}
SparkConf conf = new SparkConf().setAppName("Days of the week by on-time arrival performance");
JavaSparkContext sc = new JavaSparkContext(conf);
JavaRDD<String> lines = sc.textFile(args[0]);
JavaPairRDD<String, Double> dayArrivalDelayPair =
lines.flatMapToPair(
line -> {
String[] splitLine = line.split(SPLIT_PATTERN);
String key = splitLine.length == 0 ? "" : splitLine[0];
Double value = splitLine.length < 2 ? value = 0.0 : Double.valueOf(splitLine[1]);
return Arrays.asList(new Tuple2<>(key, value));
});
JavaPairRDD<String, AverageWrapper> dayAverageWrapper =
dayArrivalDelayPair.mapValues(value -> new AverageWrapper(value, 1));
JavaPairRDD<String, AverageWrapper> daysValueCount =
dayAverageWrapper.reduceByKey(
(aw1, aw2) ->
new AverageWrapper(
aw1.getValue() + aw2.getValue(), aw1.getCount() + aw2.getCount()));
Map<String, AverageWrapper> resultMap = daysValueCount.collectAsMap();
List<Map.Entry<String, AverageWrapper>> listResults = new ArrayList<>();
listResults.addAll(resultMap.entrySet());
Collections.sort(
listResults,
(entry1, entry2) ->
Double.valueOf(entry1.getValue().getValue()).compareTo(entry2.getValue().getValue()));
for (Map.Entry<String, AverageWrapper> entry : listResults) {
System.out.printf(
"%s -> (%f, %d)\n",
entry.getKey(), entry.getValue().getValue(), entry.getValue().getCount());
}
// JavaPairRDD<String, Double> resultRDD =
// daysValueCount.mapValues(averageWrapper -> averageWrapper.getValue() /
// averageWrapper.getCount());
//
// Map<String, Double> results = resultRDD.collectAsMap();
// List<Map.Entry<String, Double>> listResults = new ArrayList<>();
// listResults.addAll(results.entrySet());
// Collections.sort(listResults, (entry1, entry2) ->
// entry1.getValue().compareTo(entry2.getValue()));
//
// for (Map.Entry<String, Double> entry : listResults) {
// System.out.printf("%s:\t%f\n", entry.getKey(), entry.getValue());
// }
}
public static void main(String[] args) {
String master = args[0];
String appName = args[1];
String path = args[2];
SparkConf conf = new SparkConf().setAppName(appName).setMaster(master);
JavaSparkContext sc = new JavaSparkContext(conf);
JavaRDD<String> lines =
sc.textFile(path)
.filter(
new Function<String, Boolean>() {
@Override
public Boolean call(String s) throws Exception {
return !s.isEmpty() && !s.contains("Total");
}
});
JavaRDD<String> usOnly =
lines.filter(
new Function<String, Boolean>() {
@Override
public Boolean call(String s) throws Exception {
return s.contains("United States");
}
});
JavaPairRDD<String, Integer> yearAndMedals =
usOnly.mapToPair(
new PairFunction<String, String, Integer>() {
@Override
public Tuple2<String, Integer> call(String s) throws Exception {
String[] fields = s.split(",");
return new Tuple2<String, Integer>(fields[3], Integer.parseInt(fields[8]));
}
});
JavaPairRDD<String, Integer> reduced =
yearAndMedals.reduceByKey(
new Function2<Integer, Integer, Integer>() {
@Override
public Integer call(Integer accumulator, Integer currentValue) throws Exception {
return accumulator + currentValue;
}
});
JavaPairRDD<String, Integer> result =
reduced.filter(
new Function<Tuple2<String, Integer>, Boolean>() {
@Override
public Boolean call(Tuple2<String, Integer> tuple) throws Exception {
return tuple._2 < 200;
}
});
System.out.println();
System.out.println(result.collect());
}
