com.dataartisans.flink.dataflow.streaming.WindowWordCountITCase.java Source code

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Here is the source code for com.dataartisans.flink.dataflow.streaming.WindowWordCountITCase.java

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/*
 * Copyright 2015 Data Artisans GmbH
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.dataartisans.flink.dataflow.streaming;

import com.dataartisans.flink.dataflow.examples.streaming.WindowWordCount;
import com.dataartisans.flink.dataflow.util.FlinkStreamingTestPipeline;
import com.google.cloud.dataflow.sdk.Pipeline;
import com.google.cloud.dataflow.sdk.coders.StringUtf8Coder;
import com.google.cloud.dataflow.sdk.io.TextIO;
import com.google.cloud.dataflow.sdk.transforms.Count;
import com.google.cloud.dataflow.sdk.transforms.Create;
import com.google.cloud.dataflow.sdk.transforms.ParDo;
import com.google.cloud.dataflow.sdk.transforms.windowing.FixedWindows;
import com.google.cloud.dataflow.sdk.transforms.windowing.Window;
import com.google.cloud.dataflow.sdk.values.PCollection;
import com.google.common.base.Joiner;
import org.apache.flink.streaming.util.StreamingProgramTestBase;
import org.joda.time.Duration;

import java.util.Arrays;
import java.util.List;

public class WindowWordCountITCase extends StreamingProgramTestBase {

    protected String resultPath;

    public WindowWordCountITCase() {
    }

    static final String[] WORDS_ARRAY = new String[] { "hi there", "hi", "hi sue bob", "hi sue", "", "bob hi" };

    static final List<String> WORDS = Arrays.asList(WORDS_ARRAY);

    static final String[] COUNTS_ARRAY = new String[] { "hi: 5", "there: 1", "sue: 2", "bob: 2" };

    @Override
    protected void preSubmit() throws Exception {
        resultPath = getTempDirPath("result");
    }

    @Override
    protected void postSubmit() throws Exception {
        compareResultsByLinesInMemory(Joiner.on('\n').join(COUNTS_ARRAY), resultPath);
    }

    @Override
    protected void testProgram() throws Exception {

        Pipeline p = FlinkStreamingTestPipeline.create();

        PCollection<String> input = p.apply(Create.of(WORDS)).setCoder(StringUtf8Coder.of());

        PCollection<String> output = input.apply(ParDo.of(new WindowWordCount.Tokenizer()))
                .apply(Window.<String>into(FixedWindows.of(Duration.standardMinutes(1))))
                .apply(Count.<String>perElement()).apply(ParDo.of(new WindowWordCount.FormatCountsFn()));

        output.apply(TextIO.Write.to(resultPath));
        output.apply(TextIO.Write.to("testoutput"));

        p.run();
    }
}