private PTable<Integer, String> readTable(Pipeline pipeline, String filename) {
try {
return pipeline
.readTextFile(tmpDir.copyResourceFileName(filename))
.parallelDo(
"asTable",
new LineSplitter(),
Writables.tableOf(Writables.ints(), Writables.strings()));
} catch (IOException e) {
throw new RuntimeException(e);
}
}
@Override
public int run(final String[] args) throws Exception {
createTable();
final Configuration config = getConf();
final Pipeline pipeline =
new MRPipeline(CrunchStockDateInserter.class, "PipelineWithFilterFn", config);
PCollection<String> lines = pipeline.readTextFile(Constants.HDFS_INPUT_PATH + "/2004_2014.csv");
PCollection<Put> resultPut = CrunchUtils.returnDates(lines);
System.out.println("********** size ************ : " + resultPut.getSize());
pipeline.write(resultPut, new HBaseTarget(Constants.STOCK_DATES_TABLE));
PipelineResult result = pipeline.done();
return result.succeeded() ? 0 : 1;
}
public int run(String[] args) throws Exception {
Pipeline pipeline = new MRPipeline(SecondarySortingExample.class);
// Read input
PCollection<String> lines = pipeline.readTextFile(args[0]);
// Split each line and count them
PTable<String, Long> wordcount = lines.parallelDo(new Tokenizer(), Writables.strings()).count();
// Sort
PCollection<Pair<String, Long>> sorted =
Sort.sortPairs(wordcount, ColumnOrder.by(1, Sort.Order.DESCENDING));
// Write the output
sorted.write(To.textFile(args[0]));
// Kick off execution
PipelineResult result = pipeline.done();
return result.succeeded() ? 0 : 1;
}
public static void main(String[] args) throws Exception {
Pipeline pipeline = new MRPipeline(WordCount.class);
PCollection<String> lines = pipeline.readTextFile(args[0]);
PCollection<String> words =
lines.parallelDo(
"my splitter",
new DoFn<String, String>() {
public void process(String line, Emitter<String> emitter) {
for (String word : line.split("\\s+")) {
emitter.emit(word);
}
}
},
Writables.strings());
PTable<String, Long> counts = Aggregate.count(words);
pipeline.writeTextFile(counts, args[1]);
pipeline.run();
}
private PCollection<String> getPCollection(Pipeline pipeline) throws IOException {
String shakesInputPath = tmpDir.copyResourceFileName("shakes.txt");
PCollection<String> shakespeare = pipeline.readTextFile(shakesInputPath);
return shakespeare;
}
