| /** |
| * 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.twitter; |
| |
| import java.sql.PreparedStatement; |
| import java.sql.SQLException; |
| |
| import javax.annotation.Nonnull; |
| |
| import org.apache.apex.malhar.contrib.twitter.TwitterSampleInput; |
| import org.apache.apex.malhar.lib.db.jdbc.AbstractJdbcTransactionableOutputOperator; |
| import org.apache.hadoop.conf.Configuration; |
| import com.datatorrent.api.DAG; |
| import com.datatorrent.api.DAG.Locality; |
| import com.datatorrent.api.StreamingApplication; |
| import com.datatorrent.api.annotation.ApplicationAnnotation; |
| |
| import twitter4j.Status; |
| |
| /** |
| * An application which connects to Twitter Sample Input and stores all the |
| * tweets with their usernames in a mysql database. Please review the docs |
| * for TwitterTopCounterApplication to setup your twitter credentials. You |
| * may also be able to change JDBCStore credentials using config file. |
| * |
| * You will also need to create appropriate database and tables with the |
| * following schema, also included in mysql.sql in resources: |
| * <pre> |
| * DROP TABLE if exists tweets; |
| * CREATE TABLE tweets ( |
| * window_id LONG NOT NULL, |
| * creation_date DATE, |
| * text VARCHAR(256) NOT NULL, |
| * userid VARCHAR(40) NOT NULL, |
| * KEY ( userid, creation_date) |
| * ); |
| * |
| * drop table if exists dt_window_id_tracker; |
| * CREATE TABLE dt_window_id_tracker ( |
| * dt_application_id VARCHAR(100) NOT NULL, |
| * dt_operator_id int(11) NOT NULL, |
| * dt_window_id bigint NOT NULL, |
| * UNIQUE (dt_application_id, dt_operator_id, dt_window_id) |
| * ) ENGINE=MyISAM DEFAULT CHARSET=latin1; |
| * </pre> |
| * |
| * @since 0.9.4 |
| */ |
| @ApplicationAnnotation(name = "TwitterDumpExample") |
| public class TwitterDumpApplication implements StreamingApplication |
| { |
| public static class Status2Database extends AbstractJdbcTransactionableOutputOperator<Status> |
| { |
| public static final String INSERT_STATUS_STATEMENT = "insert into tweets (window_id, creation_date, text, userid) values (?, ?, ?, ?)"; |
| |
| public Status2Database() |
| { |
| store.setMetaTable("dt_window_id_tracker"); |
| store.setMetaTableAppIdColumn("dt_application_id"); |
| store.setMetaTableOperatorIdColumn("dt_operator_id"); |
| store.setMetaTableWindowColumn("dt_window_id"); |
| } |
| |
| @Nonnull |
| @Override |
| protected String getUpdateCommand() |
| { |
| return INSERT_STATUS_STATEMENT; |
| } |
| |
| @Override |
| protected void setStatementParameters(PreparedStatement statement, Status tuple) throws SQLException |
| { |
| statement.setLong(1, currentWindowId); |
| |
| statement.setDate(2, new java.sql.Date(tuple.getCreatedAt().getTime())); |
| statement.setString(3, tuple.getText()); |
| statement.setString(4, tuple.getUser().getScreenName()); |
| statement.addBatch(); |
| } |
| } |
| |
| @Override |
| public void populateDAG(DAG dag, Configuration conf) |
| { |
| //dag.setAttribute(DAGContext.APPLICATION_NAME, "TweetsDump"); |
| |
| TwitterSampleInput twitterStream = dag.addOperator("TweetSampler", new TwitterSampleInput()); |
| |
| //ConsoleOutputOperator dbWriter = dag.addOperator("DatabaseWriter", new ConsoleOutputOperator()); |
| |
| Status2Database dbWriter = dag.addOperator("DatabaseWriter", new Status2Database()); |
| dbWriter.getStore().setDatabaseDriver("com.mysql.jdbc.Driver"); |
| dbWriter.getStore().setDatabaseUrl("jdbc:mysql://node6.morado.com:3306/twitter"); |
| dbWriter.getStore().setConnectionProperties("user:twitter"); |
| |
| dag.addStream("Statuses", twitterStream.status, dbWriter.input).setLocality(Locality.CONTAINER_LOCAL); |
| } |
| |
| } |