org.apache.hadoop.mapreduce.lib.db.TestDBOutputFormat.java Source code

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Here is the source code for org.apache.hadoop.mapreduce.lib.db.TestDBOutputFormat.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.hadoop.mapreduce.lib.db;

import java.io.IOException;
import java.lang.reflect.Field;

import org.apache.commons.lang.StringUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.mapreduce.Job;
import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.fail;

public class TestDBOutputFormat {
    private String[] fieldNames = new String[] { "id", "name", "value" };
    private String[] nullFieldNames = new String[] { null, null, null };
    private String expected = "INSERT INTO hadoop_output " + "(id,name,value) VALUES (?,?,?);";
    private String nullExpected = "INSERT INTO hadoop_output VALUES (?,?,?);";

    private DBOutputFormat<DBWritable, NullWritable> format = new DBOutputFormat<DBWritable, NullWritable>();

    @Test
    public void testConstructQuery() {
        String actual = format.constructQuery("hadoop_output", fieldNames);
        assertEquals(expected, actual);

        actual = format.constructQuery("hadoop_output", nullFieldNames);
        assertEquals(nullExpected, actual);
    }

    @Test
    public void testDB2ConstructQuery() {
        String db2expected = StringUtils.removeEnd(expected, ";");
        String db2nullExpected = StringUtils.removeEnd(nullExpected, ";");

        try {
            Class<?> clazz = this.format.getClass();
            Field field = clazz.getDeclaredField("dbProductName");
            field.setAccessible(true);
            field.set(format, "DB2");
        } catch (IllegalAccessException | NoSuchFieldException e) {
            fail(e.getMessage());
        }

        String actual = format.constructQuery("hadoop_output", fieldNames);
        assertEquals(db2expected, actual);

        actual = format.constructQuery("hadoop_output", nullFieldNames);
        assertEquals(db2nullExpected, actual);
    }

    @Test
    public void testORACLEConstructQuery() {
        String oracleExpected = StringUtils.removeEnd(expected, ";");
        String oracleNullExpected = StringUtils.removeEnd(nullExpected, ";");

        try {
            Class<?> clazz = this.format.getClass();
            Field field = clazz.getDeclaredField("dbProductName");
            field.setAccessible(true);
            field.set(format, "ORACLE");
        } catch (IllegalAccessException | NoSuchFieldException e) {
            fail(e.getMessage());
        }

        String actual = format.constructQuery("hadoop_output", fieldNames);
        assertEquals(oracleExpected, actual);

        actual = format.constructQuery("hadoop_output", nullFieldNames);
        assertEquals(oracleNullExpected, actual);
    }

    @Test
    public void testSetOutput() throws IOException {
        Job job = Job.getInstance(new Configuration());
        DBOutputFormat.setOutput(job, "hadoop_output", fieldNames);

        DBConfiguration dbConf = new DBConfiguration(job.getConfiguration());
        String actual = format.constructQuery(dbConf.getOutputTableName(), dbConf.getOutputFieldNames());

        assertEquals(expected, actual);

        job = Job.getInstance(new Configuration());
        dbConf = new DBConfiguration(job.getConfiguration());
        DBOutputFormat.setOutput(job, "hadoop_output", nullFieldNames.length);
        assertNull(dbConf.getOutputFieldNames());
        assertEquals(nullFieldNames.length, dbConf.getOutputFieldCount());

        actual = format.constructQuery(dbConf.getOutputTableName(), new String[dbConf.getOutputFieldCount()]);

        assertEquals(nullExpected, actual);
    }

}