Examples of cascading.tap.Tap.openForRead()

cascading.tap.Tap.openForRead()
Method openForRead opens the resource represented by this Tap instance for reading.
{@code input} value may be null, if so, sub-classes must inquire with the underlying {@link Scheme}via {@link Scheme#sourceConfInit(cascading.flow.FlowProcess,Tap,Object)} to get the properinput type and instantiate it before calling {@code super.openForRead()}.
Note the returned iterator will return the same instance of {@link cascading.tuple.TupleEntry} on every call,thus a copy must be made of either the TupleEntry or the underlying {@code Tuple} instance if they are to bestored in a Collection. @param flowProcess of type FlowProcess @param input of type Input @return TupleEntryIterator @throws java.io.IOException when the resource cannot be opened

            webServer.stop();
        }
        
        // Verify numPages fetched and numPages status entries were saved.
        Tap validate = platform.makeTap(platform.makeBinaryScheme(FetchedDatum.FIELDS), contentPath);
        TupleEntryIterator tupleEntryIterator = validate.openForRead(platform.makeFlowProcess());
        
        int totalEntries = 0;
        boolean[] fetchedPages = new boolean[numPages];
        while (tupleEntryIterator.hasNext()) {
            TupleEntry entry = tupleEntryIterator.next();

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        Assert.assertEquals(numPages, totalEntries);
        tupleEntryIterator.close();
        
        validate = platform.makeTap(platform.makeBinaryScheme(StatusDatum.FIELDS), statusPath);
        tupleEntryIterator = validate.openForRead(platform.makeFlowProcess());
        totalEntries = 0;
        fetchedPages = new boolean[numPages];
        while (tupleEntryIterator.hasNext()) {
            TupleEntry entry = tupleEntryIterator.next();
            totalEntries += 1;

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            webServer.stop();
        }
        
        // Verify numPages fetched and numPages status entries were saved.
        Tap validate = platform.makeTap(platform.makeBinaryScheme(FetchedDatum.FIELDS), contentPath);
        TupleEntryIterator tupleEntryIterator = validate.openForRead(platform.makeFlowProcess());
        Assert.assertFalse(tupleEntryIterator.hasNext());
        tupleEntryIterator.close();
        
        validate = platform.makeTap(platform.makeBinaryScheme(StatusDatum.FIELDS), statusPath);
        tupleEntryIterator = validate.openForRead(platform.makeFlowProcess());

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        TupleEntryIterator tupleEntryIterator = validate.openForRead(platform.makeFlowProcess());
        Assert.assertFalse(tupleEntryIterator.hasNext());
        tupleEntryIterator.close();
        
        validate = platform.makeTap(platform.makeBinaryScheme(StatusDatum.FIELDS), statusPath);
        tupleEntryIterator = validate.openForRead(platform.makeFlowProcess());
        int totalEntries = 0;
        boolean[] fetchedPages = new boolean[numPages];
        while (tupleEntryIterator.hasNext()) {
            TupleEntry entry = tupleEntryIterator.next();
            totalEntries += 1;

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        } finally {
            webServer.stop();
        }
        
        Tap validate = platform.makeTap(platform.makeBinaryScheme(StatusDatum.FIELDS), statusPath);
        TupleEntryIterator tupleEntryIterator = validate.openForRead(platform.makeFlowProcess());
        int totalEntries = 0;
        while (tupleEntryIterator.hasNext()) {
            TupleEntry entry = tupleEntryIterator.next();
            totalEntries += 1;

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        FlowConnector flowConnector = platform.makeFlowConnector();
        Flow flow = flowConnector.connect(in, FetchPipe.makeSinkMap(status, content), fetchPipe);
        flow.complete();
        
        Tap validate = platform.makeTap(platform.makeBinaryScheme(FetchedDatum.FIELDS), contentPath);
        TupleEntryIterator tupleEntryIterator = validate.openForRead(platform.makeFlowProcess());
        
        int totalEntries = 0;
        while (tupleEntryIterator.hasNext()) {
            TupleEntry entry = tupleEntryIterator.next();
            totalEntries += 1;

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        Assert.assertEquals(1, totalEntries);
        tupleEntryIterator.close();
        
        validate = platform.makeTap(platform.makeBinaryScheme(StatusDatum.FIELDS), statusPath);
        tupleEntryIterator = validate.openForRead(platform.makeFlowProcess());
        totalEntries = 0;
        while (tupleEntryIterator.hasNext()) {
            TupleEntry entry = tupleEntryIterator.next();
            totalEntries += 1;

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        FlowConnector flowConnector = platform.makeFlowConnector();
        Flow flow = flowConnector.connect(in, FetchPipe.makeSinkMap(null, content), fetchPipe);
        flow.complete();
        
        Tap validate = platform.makeTap(platform.makeBinaryScheme(FetchedDatum.FIELDS), contentPath);
        TupleEntryIterator tupleEntryIterator = validate.openForRead(platform.makeFlowProcess());
        Assert.assertTrue(tupleEntryIterator.hasNext());
        TupleEntry te = tupleEntryIterator.next();
        String url = te.getString(FetchedDatum.URL_FN);
        Assert.assertTrue(url.contains("bixo-test-domain-1.com/page-1.html"));

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        FlowConnector flowConnector = platform.makeFlowConnector();
        Flow flow = flowConnector.connect(in, FetchPipe.makeSinkMap(statusSink, contentSink), fetchPipe);
        flow.complete();
        
        Tap validate = platform.makeTap(platform.makeBinaryScheme(FetchedDatum.FIELDS), contentPath);
        TupleEntryIterator tupleEntryIterator = validate.openForRead(platform.makeFlowProcess());
        Assert.assertFalse(tupleEntryIterator.hasNext());
        
        validate = platform.makeTap(platform.makeBinaryScheme(StatusDatum.FIELDS), statusPath);
        tupleEntryIterator = validate.openForRead(platform.makeFlowProcess());

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        Tap validate = platform.makeTap(platform.makeBinaryScheme(FetchedDatum.FIELDS), contentPath);
        TupleEntryIterator tupleEntryIterator = validate.openForRead(platform.makeFlowProcess());
        Assert.assertFalse(tupleEntryIterator.hasNext());
        
        validate = platform.makeTap(platform.makeBinaryScheme(StatusDatum.FIELDS), statusPath);
        tupleEntryIterator = validate.openForRead(platform.makeFlowProcess());
        
        int numEntries = 0;
        while (tupleEntryIterator.hasNext()) {
            numEntries += 1;
            TupleEntry entry = tupleEntryIterator.next();

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