/**
* @param sqlctx
* @param mb
* @param schema
* @return
* @throws DMLRuntimeException
*/
@SuppressWarnings("resource")
private DataFrame createDataFrame(
SQLContext sqlctx, MatrixBlock mb, boolean containsID, ValueType[] schema)
throws DMLRuntimeException {
// create in-memory list of rows
List<Row> list = new ArrayList<Row>();
int off = (containsID ? 1 : 0);
int clen = mb.getNumColumns() + off - colsVector + 1;
for (int i = 0; i < mb.getNumRows(); i++) {
Object[] row = new Object[clen];
if (containsID) row[0] = i + 1;
for (int j = 0, j2 = 0; j < mb.getNumColumns(); j++, j2++) {
if (schema[j2] != ValueType.OBJECT) {
row[j2 + off] = UtilFunctions.doubleToObject(schema[j2], mb.quickGetValue(i, j));
} else {
double[] tmp =
DataConverter.convertToDoubleVector(
mb.sliceOperations(i, i, j, j + colsVector - 1, new MatrixBlock()));
row[j2 + off] = new DenseVector(tmp);
j += colsVector - 1;
}
}
list.add(RowFactory.create(row));
}
// create data frame schema
List<StructField> fields = new ArrayList<StructField>();
if (containsID)
fields.add(
DataTypes.createStructField(RDDConverterUtils.DF_ID_COLUMN, DataTypes.DoubleType, true));
for (int j = 0; j < schema.length; j++) {
DataType dt = null;
switch (schema[j]) {
case STRING:
dt = DataTypes.StringType;
break;
case DOUBLE:
dt = DataTypes.DoubleType;
break;
case INT:
dt = DataTypes.LongType;
break;
case OBJECT:
dt = new VectorUDT();
break;
default:
throw new RuntimeException("Unsupported value type.");
}
fields.add(DataTypes.createStructField("C" + (j + 1), dt, true));
}
StructType dfSchema = DataTypes.createStructType(fields);
// create rdd and data frame
JavaSparkContext sc = new JavaSparkContext(sqlctx.sparkContext());
JavaRDD<Row> rowRDD = sc.parallelize(list);
return sqlctx.createDataFrame(rowRDD, dfSchema);
}
private DataFrame artistsAsDataFrame() {
String input = TestUtils.sampleArtistsDat();
JavaRDD<String> data = sc.textFile(input);
StructType schema =
DataTypes.createStructType(
new StructField[] {
DataTypes.createStructField("id", DataTypes.IntegerType, false),
DataTypes.createStructField("name", DataTypes.StringType, false),
DataTypes.createStructField("url", DataTypes.StringType, true),
DataTypes.createStructField("pictures", DataTypes.StringType, true),
DataTypes.createStructField("time", DataTypes.TimestampType, true)
});
JavaRDD<Row> rowData =
data.map(
new Function<String, String[]>() {
@Override
public String[] call(String line) throws Exception {
return line.split("\t");
}
})
.map(
new Function<String[], Row>() {
@Override
public Row call(String[] r) throws Exception {
return RowFactory.create(
Integer.parseInt(r[0]),
r[1],
r[2],
r[3],
new Timestamp(DatatypeConverter.parseDateTime(r[4]).getTimeInMillis()));
}
});
return sqc.createDataFrame(rowData, schema);
}
public StructType getQuerySchema(SolrQuery query) throws Exception {
CloudSolrClient solrServer = getSolrClient(zkHost);
// Build up a schema based on the fields requested
String fieldList = query.getFields();
String[] fields = null;
if (fieldList != null) {
fields = query.getFields().split(",");
} else {
// just go out to Solr and get 10 docs and extract a field list from that
SolrQuery probeForFieldsQuery = query.getCopy();
probeForFieldsQuery.remove("distrib");
probeForFieldsQuery.set("collection", collection);
probeForFieldsQuery.set("fl", "*");
probeForFieldsQuery.setStart(0);
probeForFieldsQuery.setRows(10);
QueryResponse probeForFieldsResp = solrServer.query(probeForFieldsQuery);
SolrDocumentList hits = probeForFieldsResp.getResults();
Set<String> fieldSet = new TreeSet<String>();
for (SolrDocument hit : hits) fieldSet.addAll(hit.getFieldNames());
fields = fieldSet.toArray(new String[0]);
}
if (fields == null || fields.length == 0)
throw new IllegalArgumentException(
"Query (" + query + ") does not specify any fields needed to build a schema!");
Set<String> liveNodes = solrServer.getZkStateReader().getClusterState().getLiveNodes();
if (liveNodes.isEmpty())
throw new RuntimeException("No live nodes found for cluster: " + zkHost);
String solrBaseUrl =
solrServer.getZkStateReader().getBaseUrlForNodeName(liveNodes.iterator().next());
if (!solrBaseUrl.endsWith("?")) solrBaseUrl += "/";
Map<String, String> fieldTypeMap = getFieldTypes(fields, solrBaseUrl, collection);
List<StructField> listOfFields = new ArrayList<StructField>();
for (String field : fields) {
String fieldType = fieldTypeMap.get(field);
DataType dataType = (fieldType != null) ? solrDataTypes.get(fieldType) : null;
if (dataType == null) dataType = DataTypes.StringType;
listOfFields.add(DataTypes.createStructField(field, dataType, true));
}
return DataTypes.createStructType(listOfFields);
}
/**
* @param args Path of the hadoop sequence file
* @throws FileNotFoundException
*/
public static void main(String[] args) throws FileNotFoundException {
String path = args[0];
JavaSparkContext sc = getSparkContext();
// sc is an existing JavaSparkContext.
SQLContext sqlContext = new org.apache.spark.sql.SQLContext(sc);
sqlContext.setConf("spark.sql.parquet.compression.codec", "snappy");
sqlContext.setConf("spark.sql.parquet.filterPushdown", "true");
long start = System.nanoTime();
// read sequence file and map
JavaRDD<Row> rowRDD =
sc.sequenceFile(path, Text.class, Text.class)
// .sample(false, 0.01, 123)
.mapToPair(t -> new Tuple2<String, String>(t._1.toString(), t._2.toString()))
.groupByKey()
.map(new HadoopToParqRow())
.cache();
List<StructField> fields =
new ArrayList<StructField>(); // create data fields of features for the DataFrame
fields.add(DataTypes.createStructField("index", DataTypes.StringType, false));
fields.add(DataTypes.createStructField("chainId1", DataTypes.StringType, false));
fields.add(DataTypes.createStructField("chainId2", DataTypes.StringType, false));
fields.add(DataTypes.createStructField("Rnum1", DataTypes.StringType, false));
fields.add(DataTypes.createStructField("Rnum2", DataTypes.StringType, false));
fields.add(DataTypes.createStructField("Ins1", DataTypes.StringType, false));
fields.add(DataTypes.createStructField("Ins2", DataTypes.StringType, false));
fields.add(DataTypes.createStructField("res1", DataTypes.StringType, false));
fields.add(DataTypes.createStructField("res2", DataTypes.StringType, false));
fields.add(DataTypes.createStructField("atom1", DataTypes.StringType, false));
fields.add(DataTypes.createStructField("atom2", DataTypes.StringType, false));
fields.add(DataTypes.createStructField("element1", DataTypes.StringType, false));
fields.add(DataTypes.createStructField("element2", DataTypes.StringType, false));
fields.add(DataTypes.createStructField("distance", DataTypes.IntegerType, false));
fields.add(
DataTypes.createStructField(
"pdbId", DataTypes.createArrayType(DataTypes.StringType), false));
StructType schema = DataTypes.createStructType(fields);
// Apply the schema to the RDD.
DataFrame dataFrame = sqlContext.createDataFrame(rowRDD, schema);
dataFrame
.coalesce(1)
.write()
.mode(SaveMode.Overwrite)
.partitionBy("index")
.parquet("/Users/hina/Data/ExampleFiles/seq.parquet");
sc.close();
System.out.println("Time: " + (System.nanoTime() - start) / 1E9 + " sec.");
}
public static void main(String[] args) {
SparkConf conf = SparkConfBuilder.buildLocal("movie-lense-df");
JavaSparkContext sc = new JavaSparkContext(conf);
SQLContext sqlContext = new SQLContext(sc);
// user id | item id | rating | timestam
JavaRDD<Row> dataRdd =
sc.textFile("data/ml-100k/u.data")
.map(
line -> {
String[] col = line.split("\t");
return RowFactory.create(
Integer.valueOf(col[0]),
Integer.valueOf(col[1]),
Integer.valueOf(col[2]),
Long.valueOf(col[3]));
});
List<StructField> dataFields = new ArrayList<>();
dataFields.add(DataTypes.createStructField("userId", DataTypes.IntegerType, false));
dataFields.add(DataTypes.createStructField("itemId", DataTypes.IntegerType, true));
dataFields.add(DataTypes.createStructField("rating", DataTypes.IntegerType, true));
dataFields.add(DataTypes.createStructField("timestamp", DataTypes.LongType, true));
StructType dataSchema = DataTypes.createStructType(dataFields);
DataFrame data = sqlContext.createDataFrame(dataRdd, dataSchema);
data.show();
// movie id | movie title | release date | video release date |
// IMDb URL | unknown | Action | Adventure | Animation |
// Children's | Comedy | Crime | Documentary | Drama | Fantasy |
// Film-Noir | Horror | Musical | Mystery | Romance | Sci-Fi |
// Thriller | War | Western |
JavaRDD<Row> itemRdd =
sc.textFile("data/ml-100k/u.item")
.map(
line -> {
String[] col = line.split("\\|");
return RowFactory.create(
Integer.valueOf(col[0]),
col[1],
col[2],
col[3],
col[4],
toBool(col[5]),
toBool(col[6]),
toBool(col[7]),
toBool(col[8]),
toBool(col[9]),
toBool(col[10]),
toBool(col[11]),
toBool(col[12]),
toBool(col[13]),
toBool(col[14]),
toBool(col[15]),
toBool(col[16]),
toBool(col[17]),
toBool(col[18]),
toBool(col[19]),
toBool(col[20]),
toBool(col[21]),
toBool(col[22]),
toBool(col[23]));
});
List<StructField> itemFields = new ArrayList<>();
itemFields.add(DataTypes.createStructField("movieId", DataTypes.IntegerType, false));
itemFields.add(DataTypes.createStructField("movieTitle", DataTypes.StringType, true));
itemFields.add(DataTypes.createStructField("releaseDate", DataTypes.StringType, true));
itemFields.add(DataTypes.createStructField("videoReleaseDate", DataTypes.StringType, true));
itemFields.add(DataTypes.createStructField("imdbUrl", DataTypes.StringType, true));
itemFields.add(DataTypes.createStructField("unknown", DataTypes.BooleanType, true));
itemFields.add(DataTypes.createStructField("action", DataTypes.BooleanType, true));
itemFields.add(DataTypes.createStructField("adventure", DataTypes.BooleanType, true));
itemFields.add(DataTypes.createStructField("animation", DataTypes.BooleanType, true));
itemFields.add(DataTypes.createStructField("childrens", DataTypes.BooleanType, true));
itemFields.add(DataTypes.createStructField("comedy", DataTypes.BooleanType, true));
itemFields.add(DataTypes.createStructField("crime", DataTypes.BooleanType, true));
itemFields.add(DataTypes.createStructField("documentary", DataTypes.BooleanType, true));
itemFields.add(DataTypes.createStructField("drama", DataTypes.BooleanType, true));
itemFields.add(DataTypes.createStructField("fantasy", DataTypes.BooleanType, true));
itemFields.add(DataTypes.createStructField("filmNoir", DataTypes.BooleanType, true));
itemFields.add(DataTypes.createStructField("horror", DataTypes.BooleanType, true));
itemFields.add(DataTypes.createStructField("musical", DataTypes.BooleanType, true));
itemFields.add(DataTypes.createStructField("mystery", DataTypes.BooleanType, true));
itemFields.add(DataTypes.createStructField("romance", DataTypes.BooleanType, true));
itemFields.add(DataTypes.createStructField("sciFi", DataTypes.BooleanType, true));
itemFields.add(DataTypes.createStructField("thriller", DataTypes.BooleanType, true));
itemFields.add(DataTypes.createStructField("war", DataTypes.BooleanType, true));
itemFields.add(DataTypes.createStructField("western", DataTypes.BooleanType, true));
StructType itemSchema = DataTypes.createStructType(itemFields);
DataFrame item = sqlContext.createDataFrame(itemRdd, itemSchema);
item.show();
// user id | age | gender | occupation | zip code
JavaRDD<Row> userRdd =
sc.textFile("data/ml-100k/u.user")
.map(
line -> {
String[] col = line.split("\\|");
return RowFactory.create(
Integer.valueOf(col[0]), Integer.valueOf(col[1]), col[2], col[3], col[4]);
});
List<StructField> userFields = new ArrayList<>();
userFields.add(DataTypes.createStructField("userId", DataTypes.IntegerType, false));
userFields.add(DataTypes.createStructField("age", DataTypes.IntegerType, true));
userFields.add(DataTypes.createStructField("gender", DataTypes.StringType, true));
userFields.add(DataTypes.createStructField("occupation", DataTypes.StringType, true));
userFields.add(DataTypes.createStructField("zipCode", DataTypes.StringType, true));
StructType userSchema = DataTypes.createStructType(userFields);
DataFrame user = sqlContext.createDataFrame(userRdd, userSchema);
user.show();
}