org.apache.apex.examples.JdbcToJdbc.JdbcOperatorTest.java Source code

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Here is the source code for org.apache.apex.examples.JdbcToJdbc.JdbcOperatorTest.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.JdbcToJdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import javax.validation.ConstraintViolationException;

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

import org.apache.apex.malhar.lib.db.jdbc.AbstractJdbcInputOperator;
import org.apache.apex.malhar.lib.db.jdbc.AbstractJdbcTransactionableOutputOperator;
import org.apache.apex.malhar.lib.db.jdbc.JdbcTransactionalStore;
import org.apache.hadoop.conf.Configuration;

import com.datatorrent.api.LocalMode;

/**
 * Tests for {@link AbstractJdbcTransactionableOutputOperator} and
 * {@link AbstractJdbcInputOperator}
 */
public class JdbcOperatorTest {
    public static final String DB_DRIVER = "org.hsqldb.jdbcDriver";
    public 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 OUTPUT_TABLE_NAME = "test_output_event_table";

    @BeforeClass
    public static void setup() {
        try {
            dropTable();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }

        try {
            Class.forName(DB_DRIVER).newInstance();

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

            String createMetaTable = "CREATE TABLE IF NOT EXISTS " + JdbcTransactionalStore.DEFAULT_META_TABLE
                    + " ( " + JdbcTransactionalStore.DEFAULT_APP_ID_COL + " VARCHAR(100) NOT NULL, "
                    + JdbcTransactionalStore.DEFAULT_OPERATOR_ID_COL + " INT NOT NULL, "
                    + JdbcTransactionalStore.DEFAULT_WINDOW_COL + " BIGINT NOT NULL, " + "UNIQUE ("
                    + JdbcTransactionalStore.DEFAULT_APP_ID_COL + ", "
                    + JdbcTransactionalStore.DEFAULT_OPERATOR_ID_COL + ", "
                    + JdbcTransactionalStore.DEFAULT_WINDOW_COL + ") " + ")";

            stmt.executeUpdate(createMetaTable);

            String createTable = "CREATE TABLE " + TABLE_NAME
                    + " (ACCOUNT_NO INTEGER, NAME VARCHAR(255),AMOUNT INTEGER)";
            stmt.executeUpdate(createTable);
            insertEventsInTable(10, 0);

            String createOutputTable = "CREATE TABLE " + OUTPUT_TABLE_NAME
                    + " (ACCOUNT_NO INTEGER, NAME VARCHAR(255),AMOUNT INTEGER)";
            stmt.executeUpdate(createOutputTable);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    public static void dropTable() {
        try {
            Connection con = DriverManager.getConnection(URL);
            Statement stmt = con.createStatement();
            String cleanTable = "DROP TABLE IF EXISTS " + TABLE_NAME;
            stmt.executeUpdate(cleanTable);
            String cleanOutputTable = "DROP TABLE IF EXISTS " + OUTPUT_TABLE_NAME;
            stmt.executeUpdate(cleanOutputTable);

        } 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);
        }
    }

    public int getNumOfEventsInStore() {
        Connection con;
        try {
            con = DriverManager.getConnection(URL);
            Statement stmt = con.createStatement();

            String countQuery = "SELECT count(*) from " + OUTPUT_TABLE_NAME;
            ResultSet resultSet = stmt.executeQuery(countQuery);
            resultSet.next();
            return resultSet.getInt(1);
        } catch (SQLException e) {
            throw new RuntimeException("fetching count", 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-JdbcToJdbcApp.xml"));
            lma.prepareDAG(new JdbcToJdbcApp(), conf);
            LocalMode.Controller lc = lma.getController();
            lc.runAsync();

            // wait for records to be added to table
            Thread.sleep(5000);

            Assert.assertEquals("Events in store", 10, getNumOfEventsInStore());
            dropTable();

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