org.apache.apex.examples.JdbcIngest.JdbcInputAppTest.java Source code

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Here is the source code for org.apache.apex.examples.JdbcIngest.JdbcInputAppTest.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.examples.JdbcIngest;

import java.io.File;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Collection;

import javax.validation.ConstraintViolationException;

import org.junit.AfterClass;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;

import org.apache.commons.io.FileUtils;
import org.apache.hadoop.conf.Configuration;

import com.datatorrent.api.LocalMode;

/**
 * Application test for {@link JdbcHDFSApp}
 */
public class JdbcInputAppTest {
    private static final String DB_DRIVER = "org.hsqldb.jdbcDriver";
    private static final String URL = "jdbc:hsqldb:mem:test;sql.syntax_mys=true";
    private static final String TABLE_NAME = "test_event_table";
    private static final String FILE_NAME = "/tmp/jdbcApp";

    @BeforeClass
    public static void setup() {
        try {
            cleanup();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
        try {
            Class.forName(DB_DRIVER).newInstance();

            Connection con = DriverManager.getConnection(URL);
            Statement stmt = con.createStatement();

            String createTable = "CREATE TABLE IF NOT EXISTS " + TABLE_NAME
                    + " (ACCOUNT_NO INTEGER, NAME VARCHAR(255),AMOUNT INTEGER)";
            stmt.executeUpdate(createTable);
            cleanTable();
            insertEventsInTable(10, 0);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    @AfterClass
    public static void cleanup() {
        try {
            FileUtils.deleteDirectory(new File(FILE_NAME));
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    public static void cleanTable() {
        try {
            Connection con = DriverManager.getConnection(URL);
            Statement stmt = con.createStatement();
            String cleanTable = "delete from " + TABLE_NAME;
            stmt.executeUpdate(cleanTable);
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }
    }

    public static void insertEventsInTable(int numEvents, int offset) {
        try {
            Connection con = DriverManager.getConnection(URL);
            String insert = "insert into " + TABLE_NAME + " values (?,?,?)";
            PreparedStatement stmt = con.prepareStatement(insert);
            for (int i = 0; i < numEvents; i++, offset++) {
                stmt.setInt(1, offset);
                stmt.setString(2, "Account_Holder-" + offset);
                stmt.setInt(3, (offset * 1000));
                stmt.executeUpdate();
            }
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }
    }

    @Test
    public void testApplication() throws Exception {
        try {
            LocalMode lma = LocalMode.newInstance();
            Configuration conf = new Configuration(false);
            conf.addResource(this.getClass().getResourceAsStream("/META-INF/properties-SimpleJdbcToHDFSApp.xml"));
            lma.prepareDAG(new JdbcHDFSApp(), conf);
            LocalMode.Controller lc = lma.getController();
            lc.runAsync();

            // wait for output files to roll
            Thread.sleep(5000);

            String[] extensions = { "dat.0", "tmp" };
            Collection<File> list = FileUtils.listFiles(new File(FILE_NAME), extensions, false);
            Assert.assertEquals("Records in file", 10, FileUtils.readLines(list.iterator().next()).size());

        } catch (ConstraintViolationException e) {
            Assert.fail("constraint violations: " + e.getConstraintViolations());
        }
    }
}