Examples of cascading.pipe.Pipe

cascading.pipe.Pipe
Class Pipe is used to name branches in pipe assemblies, and as a base class for core processing model types, specifically {@link Each}, {@link Every}, {@link GroupBy}, {@link CoGroup}, {@link Merge}, {@link HashJoin}, and {@link SubAssembly}.
Pipes are chained together through their constructors.
To effect a split in the pipe, simply pass a Pipe instance to two or more constructors of subsequent Pipe instances.
A join can be achieved by passing two or more Pipe instances to a {@link CoGroup} or {@link HashJoin} pipe.
A merge can be achieved by passing two or more Pipe instances to a {@link GroupBy} or {@link Merge} pipe. @see Each @see Every @see GroupBy @see Merge @see CoGroup @see HashJoin @see SubAssembly


        Tap in = sourceTap();
        // use an existing id to allow the update to succeed
        Tap out = new EsTap("cascading-local/upsert-script", new Fields("id", "name", "url", "picture"));


        Pipe pipe = new Pipe("copy");
        build(properties, in, out, pipe);
    }

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        Tap in = sourceTap();
        // use an existing id to allow the update to succeed
        Tap out = new EsTap("cascading-local/upsert-param-script", new Fields("id", "name", "url", "picture"));


        Pipe pipe = new Pipe("copy");
        build(properties, in, out, pipe);
    }

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        Tap in = sourceTap();
        // use an existing id to allow the update to succeed
        Tap out = new EsTap("cascading-local/upsert-script-json-script", new Fields("id", "name", "url", "picture"));


        Pipe pipe = new Pipe("copy");
        build(properties, in, out, pipe);
    }

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


    @Test
    public void testCascadeConnector() {
        Pipe copy = new Pipe("copy");
        Properties cfg = new TestSettings().getProperties();


        FlowDef flow = new FlowDef().addSource(copy, sourceTap()).addTailSink(copy,
                new EsTap("cascading-local/cascade-connector"));

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    }


    @Test
    public void testReadFromES() throws Exception {
        Tap in = new EsTap("cascading-local/artists", query);
        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);

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    }


    @Test
    public void testReadFromESWithFields() throws Exception {
        Tap in = new EsTap("cascading-local/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());
        pipe = new GroupBy(pipe);
        pipe = new Every(pipe, new Count());

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    }


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


        // print out

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    }


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


        // print out

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        props.put(ConfigurationOptions.ES_INPUT_JSON, "true");


        Tap in = sourceTap();
        Tap out = new EsTap("json-cascading-local/artists");


        Pipe pipe = new Pipe("copy");
        build(props, in, out, pipe);
    }

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        properties.put(ConfigurationOptions.ES_INDEX_AUTO_CREATE, "false");
        properties.put(ConfigurationOptions.ES_INPUT_JSON, "true");


        Tap in = sourceTap();
        Tap out = new EsTap("json-cascading-local/non-existing", new Fields("line"));
        Pipe pipe = new Pipe("copy");
        build(properties, in, out, pipe);
    }

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