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

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Here is the source code for com.datatorrent.lib.db.jdbc.JdbcPojoOperatorApplicationTest.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.DefaultOutputPort;
import com.datatorrent.api.InputOperator;
import com.datatorrent.api.LocalMode;
import com.datatorrent.api.StreamingApplication;
import com.datatorrent.common.util.BaseOperator;
import com.datatorrent.stram.StramLocalCluster;

public class JdbcPojoOperatorApplicationTest 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);
        }
    }

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

    public static class JdbcPojoOperatorApplication implements StreamingApplication {
        @Override
        public void populateDAG(DAG dag, Configuration configuration) {
            JdbcPOJOInsertOutputOperator jdbc = dag.addOperator("JdbcOutput", new JdbcPOJOInsertOutputOperator());
            JdbcTransactionalStore outputStore = new JdbcTransactionalStore();
            outputStore.setDatabaseDriver(DB_DRIVER);
            outputStore.setDatabaseUrl(URL);
            jdbc.setStore(outputStore);
            jdbc.setBatchSize(3);
            jdbc.setTablename(TABLE_POJO_NAME);
            dag.getMeta(jdbc).getMeta(jdbc.input).getAttributes().put(Context.PortContext.TUPLE_CLASS,
                    TestPOJOEvent.class);
            cleanTable();
            JdbcPojoEmitterOperator input = dag.addOperator("data", new JdbcPojoEmitterOperator());
            dag.addStream("pojo", input.output, jdbc.input);
        }
    }

    public static class JdbcPojoEmitterOperator extends BaseOperator implements InputOperator {
        public static int emitTuple = 10;
        public final transient DefaultOutputPort<TestPOJOEvent> output = new DefaultOutputPort<TestPOJOEvent>();

        @Override
        public void emitTuples() {
            if (emitTuple > 0) {
                output.emit(new TestPOJOEvent(emitTuple, "test" + emitTuple));
                emitTuple--;
                TupleCount++;
            }
        }

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