com.datatorrent.lib.db.jdbc.JdbcInputOperatorApplicationTest.java Source code

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Here is the source code for com.datatorrent.lib.db.jdbc.JdbcInputOperatorApplicationTest.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 com.datatorrent.lib.db.jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.concurrent.Callable;

import javax.validation.ConstraintViolationException;

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

import org.apache.hadoop.conf.Configuration;

import com.datatorrent.api.Context;
import com.datatorrent.api.DAG;
import com.datatorrent.api.DefaultInputPort;
import com.datatorrent.api.LocalMode;
import com.datatorrent.api.StreamingApplication;
import com.datatorrent.common.util.BaseOperator;
import com.datatorrent.lib.util.FieldInfo;
import com.datatorrent.stram.StramLocalCluster;

/**
 * Tests to check if setting List of {@link FieldInfo} externally from
 * configuration file works fine for Jdbc input operators.
 */
public class JdbcInputOperatorApplicationTest extends JdbcOperatorTest {
    public static int TupleCount;

    public int getNumOfRowsinTable(String tableName) {
        Connection con;
        try {
            con = DriverManager.getConnection(URL);
            Statement stmt = con.createStatement();
            String countQuery = "SELECT count(*) from " + tableName;
            ResultSet resultSet = stmt.executeQuery(countQuery);
            resultSet.next();
            return resultSet.getInt(1);
        } catch (SQLException e) {
            throw new RuntimeException("fetching count", e);
        }
    }

    public void testApplication(StreamingApplication streamingApplication) throws Exception {
        try {
            LocalMode lma = LocalMode.newInstance();
            Configuration conf = new Configuration(false);
            conf.addResource(this.getClass().getResourceAsStream("/JdbcProperties.xml"));
            lma.prepareDAG(streamingApplication, conf);
            LocalMode.Controller lc = lma.getController();
            lc.setHeartbeatMonitoringEnabled(false);
            ((StramLocalCluster) lc).setExitCondition(new Callable<Boolean>() {
                @Override
                public Boolean call() throws Exception {
                    return TupleCount == 10;
                }
            });
            lc.run(10000);// runs for 10 seconds and quits
            Assert.assertEquals("rows in db", TupleCount, getNumOfRowsinTable(TABLE_POJO_NAME));
        } catch (ConstraintViolationException e) {
            Assert.fail("constraint violations: " + e.getConstraintViolations());
        }

    }

    @Test
    public void testJdbcPOJOPollInputOperatorApplication() throws Exception {
        testApplication(new JdbcPOJOPollInputOperatorApplication());
    }

    @Test
    public void testJdbcPOJOInputOperatorApplication() throws Exception {
        testApplication(new JdbcPOJOInputOperatorApplication());
    }

    public static class JdbcPOJOInputOperatorApplication implements StreamingApplication {
        @Override
        public void populateDAG(DAG dag, Configuration configuration) {
            cleanTable();
            insertEvents(10, true, 0);
            JdbcPOJOInputOperator inputOperator = dag.addOperator("JdbcPOJOInput", new JdbcPOJOInputOperator());
            JdbcStore store = new JdbcStore();
            store.setDatabaseDriver(DB_DRIVER);
            store.setDatabaseUrl(URL);
            inputOperator.setStore(store);
            inputOperator.setTableName(TABLE_POJO_NAME);
            inputOperator.setFetchSize(100);
            dag.getMeta(inputOperator).getMeta(inputOperator.outputPort).getAttributes()
                    .put(Context.PortContext.TUPLE_CLASS, TestPOJOEvent.class);
            ResultCollector result = dag.addOperator("result", new ResultCollector());
            dag.addStream("pojo", inputOperator.outputPort, result.input);
        }
    }

    public static class JdbcPOJOPollInputOperatorApplication implements StreamingApplication {
        @Override
        public void populateDAG(DAG dag, Configuration configuration) {
            cleanTable();
            insertEvents(10, true, 0);
            JdbcPOJOPollInputOperator inputOperator = dag.addOperator("JdbcPOJOPollInput",
                    new JdbcPOJOPollInputOperator());
            JdbcStore store = new JdbcStore();
            store.setDatabaseDriver(DB_DRIVER);
            store.setDatabaseUrl(URL);
            inputOperator.setStore(store);
            inputOperator.setTableName(TABLE_POJO_NAME);
            inputOperator.setKey("id");
            inputOperator.setFetchSize(100);
            inputOperator.setBatchSize(100);
            inputOperator.setPartitionCount(2);
            dag.getMeta(inputOperator).getMeta(inputOperator.outputPort).getAttributes()
                    .put(Context.PortContext.TUPLE_CLASS, TestPOJOEvent.class);
            ResultCollector result = dag.addOperator("result", new ResultCollector());
            dag.addStream("pojo", inputOperator.outputPort, result.input);
        }
    }

    public static class ResultCollector extends BaseOperator {
        public final transient DefaultInputPort<java.lang.Object> input = new DefaultInputPort<Object>() {
            @Override
            public void process(java.lang.Object in) {
                TestPOJOEvent obj = (TestPOJOEvent) in;
                TupleCount++;
            }
        };

        @Override
        public void setup(Context.OperatorContext context) {
            TupleCount = 0;
        }
    }

}