Examples of Tap

cascading.tap.Tap
A Tap represents the physical data source or sink in a connected {@link cascading.flow.Flow}.
That is, a source Tap is the head end of a connected {@link Pipe} and {@link Tuple} stream, anda sink Tap is the tail end. Kinds of Tap types are used to manage files from a local disk, distributed disk, remote storage like Amazon S3, or via FTP. It simply abstracts out the complexity of connecting to these types of data sources.
A Tap takes a {@link Scheme} instance, which is used to identify the type of resource (text file, binary file, etc).A Tap is responsible for how the resource is reached.
By default when planning a Flow, Tap equality is a function of the {@link #getIdentifier()} and {@link #getScheme()}values. That is, two Tap instances are the same Tap instance if they sink/source the same resource and sink/source the same fields.
Some more advanced taps, like a database tap, may need to extend equality to include any filtering, like the {@code where} clause in a SQL statement so two taps reading from the same SQL table aren't considered equal.
Taps are also used to determine dependencies between two or more {@link Flow} instances when used with a{@link cascading.cascade.Cascade}. In that case the {@link #getFullIdentifier(Object)} value is used and the Schemeis ignored.
com.vst.model.Tap
Created by IntelliJ IDEA. User: And Lilia Date: 07.04.2009 Time: 18:32:46 To change this template use File | Settings | File Templates. @hibernate.subclass discriminator-value = "tap"
org.springframework.xd.test.fixtures.Tap
Test fixture that creates a tap. @author Glenn Renfro

Examples of cascading.tap.Tap

        RestUtils.refresh("cascading-hadoop");
    }


    @Test
    public void testReadFromES() throws Exception {
        Tap in = new EsTap("cascading-hadoop/artists", query);
        Pipe pipe = new Pipe("copy");
        pipe = new Each(pipe, AssertionLevel.STRICT, new AssertSizeLessThan(5));
        pipe = new Each(pipe, AssertionLevel.STRICT, new AssertNotNull());


        // print out
        Tap out = new HadoopPrintStreamTap(Stream.NULL);
        //Tap out = new Hfs(new TextDelimited(), "cascadingbug-1", SinkMode.REPLACE);
        //FlowDef flowDef = FlowDef.flowDef().addSource(pipe, in).addTailSink(pipe, out);


        build(cfg(), in, out, pipe);
    }

View Full Code Here

Examples of cascading.tap.Tap

    }




    @Test
    public void testReadFromESWithFields() throws Exception {
        Tap in = new EsTap("cascading-hadoop/artists", query, new Fields("url", "name"));
        Pipe pipe = new Pipe("copy");
        pipe = new Each(pipe, AssertionLevel.STRICT, new AssertSizeEquals(2));
        pipe = new Each(pipe, AssertionLevel.STRICT, new AssertNotNull());


        // print out
        Tap out = new HadoopPrintStreamTap(Stream.NULL);
        build(cfg(), in, out, pipe);
    }

View Full Code Here

Examples of cascading.tap.Tap

        build(cfg(), in, out, pipe);
    }


    @Test
    public void testReadFromESAliasedField() throws Exception {
        Tap in = new EsTap("cascading-hadoop/alias", query, new Fields("address"));
        Pipe pipe = new Pipe("copy");
        pipe = new Each(pipe, AssertionLevel.STRICT, new AssertNotNull());


        // print out
        Tap out = new HadoopPrintStreamTap(Stream.NULL);
        build(cfg(), in, out, pipe);
    }

View Full Code Here

Examples of cascading.tap.Tap

        build(cfg(), in, out, pipe);
    }


    @Test
    public void testReadFromESWithFieldAlias() throws Exception {
        Tap in = new EsTap("cascading-hadoop/alias", query, new Fields("url"));
        Pipe pipe = new Pipe("copy");
        pipe = new Each(pipe, AssertionLevel.STRICT, new AssertNotNull());


        // print out
        Tap out = new HadoopPrintStreamTap(Stream.NULL);
        Properties cfg = cfg();
        cfg.setProperty("es.mapping.names", "url:address");
        build(cfg, in, out, pipe);
    }

View Full Code Here

Examples of cascading.tap.Tap

        RestUtils.refresh("cascading-hadoop");


        Properties cfg = cfg();
        cfg.setProperty("es.mapping.names", "nested:data.map.key");


        Tap in = new EsTap("cascading-hadoop/nestedmap", new Fields("nested"));
        Pipe pipe = new Pipe("copy");
        pipe = new Each(pipe, new FilterNotNull());
        pipe = new Each(pipe, AssertionLevel.STRICT, new AssertSizeLessThan(2));


        // print out
        Tap out = new HadoopPrintStreamTap(Stream.NULL);
        build(cfg, in, out, pipe);
    }

View Full Code Here

Examples of cascading.tap.Tap

    }




    @Test
    public void testReadFromES() throws Exception {
        Tap in = new EsTap(indexPrefix + "cascading-local/artists");
        Pipe pipe = new Pipe("copy");
        pipe = new Each(pipe, new FilterNotNull());
        pipe = new Each(pipe, AssertionLevel.STRICT, new AssertSizeLessThan(5));
        // can't select when using unknown
        //pipe = new Each(pipe, new Fields("name"), AssertionLevel.STRICT, new AssertNotNull());
        pipe = new GroupBy(pipe);
        pipe = new Every(pipe, new Count());


        // print out
        Tap out = new OutputStreamTap(new TextLine(), OUT);
        build(cfg(), in, out, pipe);
    }

View Full Code Here

Examples of cascading.tap.Tap

        RestUtils.refresh(indexPrefix + "cascading-local");


        Properties cfg = cfg();
        cfg.setProperty("es.mapping.names", "nested:data.map.key");


        Tap in = new EsTap(indexPrefix + "cascading-local/nestedmap", new Fields("nested"));
        Pipe pipe = new Pipe("copy");
        pipe = new Each(pipe, new FilterNotNull());
        pipe = new Each(pipe, AssertionLevel.STRICT, new AssertSizeLessThan(2));


        // print out
        Tap out = new OutputStreamTap(new TextLine(), OUT);
        build(cfg, in, out, pipe);
    }

View Full Code Here

Examples of cascading.tap.Tap

    public void testCreateTap() {
        Fields fl = new Fields();
        Properties props = new Properties();


        Scheme scheme = factory.createScheme(fl, props);
        Tap tap = factory.createTap(scheme, "somePath", SinkMode.KEEP, props);
        assertThat(tap, notNullValue());
        assertThat(tap.getClass().getName(), containsString("HadoopTap"));
    }

View Full Code Here

Examples of cascading.tap.Tap

    @SuppressWarnings("rawtypes")
    public void importUrls(boolean debug) throws Exception {




        try {
            Tap urlSource = _platform.makeTap(_platform.makeTextScheme(), _inputFilePath);
            Pipe importPipe = new Each("url importer", new Fields("line"), new CreateUrlFromTextFunction(new SimpleUrlNormalizer(), new SimpleUrlValidator()));


            Tap urlSink = _platform.makeTap(_platform.makeBinaryScheme(CrawlDbDatum.FIELDS), _destDirPath, SinkMode.REPLACE);


            FlowConnector flowConnector = _platform.makeFlowConnector();
            Flow flow = flowConnector.connect(urlSource, urlSink, importPipe);
            flow.complete();
        } catch (Exception e) {

View Full Code Here

Examples of cascading.tap.Tap

    }


  @SuppressWarnings({ "unchecked", "rawtypes" })
    private static void processStatus(BasePlatform platform, BasePath curDirPath) throws Exception {
        BasePath statusPath = platform.makePath(curDirPath, CrawlConfig.STATUS_SUBDIR_NAME);
        Tap statusTap = platform.makeTap(platform.makeTextScheme(), statusPath);
        
        TupleEntryIterator iter = statusTap.openForRead(platform.makeFlowProcess());
        
        LOGGER.info("Analyzing: " +  CrawlConfig.STATUS_SUBDIR_NAME);
        UrlStatus[] statusValues = UrlStatus.values();
        int[] statusCounts = new int[statusValues.length];
        int totalEntries = 0;

View Full Code Here

0 1 2 3 4 5

TOP

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.