org.apache.apex.malhar.sql.sample.SQLApplicationWithModelFileTest.java Source code

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Here is the source code for org.apache.apex.malhar.sql.sample.SQLApplicationWithModelFileTest.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.apex.malhar.sql.sample;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.util.Arrays;
import java.util.Collection;
import java.util.TimeZone;

import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

import org.apache.hadoop.conf.Configuration;

import com.google.common.base.Predicates;
import com.google.common.collect.Collections2;
import com.google.common.collect.Lists;

import com.datatorrent.api.LocalMode;

public class SQLApplicationWithModelFileTest {
    private TimeZone defaultTZ;

    @Before
    public void setUp() throws Exception {
        defaultTZ = TimeZone.getDefault();
        TimeZone.setDefault(TimeZone.getTimeZone("GMT"));
    }

    @After
    public void tearDown() throws Exception {
        TimeZone.setDefault(defaultTZ);
    }

    @Test
    public void test() throws Exception {
        LocalMode lma = LocalMode.newInstance();
        Configuration conf = new Configuration(false);
        conf.addResource(this.getClass().getResourceAsStream("/META-INF/properties.xml"));
        conf.addResource(
                this.getClass().getResourceAsStream("/META-INF/properties-SQLApplicationWithModelFile.xml"));

        SQLApplicationWithModelFile app = new SQLApplicationWithModelFile();

        lma.prepareDAG(app, conf);

        LocalMode.Controller lc = lma.getController();

        PrintStream originalSysout = System.out;
        final ByteArrayOutputStream baos = new ByteArrayOutputStream();
        System.setOut(new PrintStream(baos));

        lc.runAsync();
        waitTillStdoutIsPopulated(baos, 30000);
        lc.shutdown();

        System.setOut(originalSysout);

        String[] sout = baos.toString().split(System.lineSeparator());
        Collection<String> filter = Collections2.filter(Arrays.asList(sout),
                Predicates.containsPattern("Delta Record:"));

        String[] actualLines = filter.toArray(new String[filter.size()]);
        Assert.assertTrue(actualLines[0].contains("RowTime=Mon Feb 15 10:15:00 GMT 2016, Product=paint1"));
        Assert.assertTrue(actualLines[1].contains("RowTime=Mon Feb 15 10:16:00 GMT 2016, Product=paint2"));
        Assert.assertTrue(actualLines[2].contains("RowTime=Mon Feb 15 10:17:00 GMT 2016, Product=paint3"));
        Assert.assertTrue(actualLines[3].contains("RowTime=Mon Feb 15 10:18:00 GMT 2016, Product=paint4"));
        Assert.assertTrue(actualLines[4].contains("RowTime=Mon Feb 15 10:19:00 GMT 2016, Product=paint5"));
        Assert.assertTrue(actualLines[5].contains("RowTime=Mon Feb 15 10:10:00 GMT 2016, Product=abcde6"));
    }

    public static boolean waitTillStdoutIsPopulated(ByteArrayOutputStream baos, int timeout)
            throws InterruptedException, IOException {
        long now = System.currentTimeMillis();
        Collection<String> filter = Lists.newArrayList();
        while (System.currentTimeMillis() - now < timeout) {
            baos.flush();
            String[] sout = baos.toString().split(System.lineSeparator());
            filter = Collections2.filter(Arrays.asList(sout), Predicates.containsPattern("Delta Record:"));
            if (filter.size() != 0) {
                break;
            }

            Thread.sleep(500);
        }

        return (filter.size() != 0);
    }

}