| /** |
| * 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.JdbcIngest; |
| |
| import java.util.List; |
| |
| import org.apache.hadoop.conf.Configuration; |
| |
| import com.google.common.collect.Lists; |
| |
| import com.datatorrent.api.Context.PortContext; |
| import com.datatorrent.api.DAG; |
| import com.datatorrent.api.StreamingApplication; |
| import com.datatorrent.api.annotation.ApplicationAnnotation; |
| import com.datatorrent.lib.db.jdbc.JdbcPOJOPollInputOperator; |
| import com.datatorrent.lib.db.jdbc.JdbcStore; |
| import com.datatorrent.lib.util.FieldInfo; |
| import com.datatorrent.lib.util.FieldInfo.SupportType; |
| |
| @ApplicationAnnotation(name = "PollJdbcToHDFSApp") |
| public class JdbcPollerApplication implements StreamingApplication |
| { |
| @Override |
| public void populateDAG(DAG dag, Configuration conf) |
| { |
| JdbcPOJOPollInputOperator poller = dag.addOperator("JdbcPoller", new JdbcPOJOPollInputOperator()); |
| |
| JdbcStore store = new JdbcStore(); |
| poller.setStore(store); |
| |
| poller.setFieldInfos(addFieldInfos()); |
| |
| FileLineOutputOperator writer = dag.addOperator("Writer", new FileLineOutputOperator()); |
| dag.setInputPortAttribute(writer.input, PortContext.PARTITION_PARALLEL, true); |
| writer.setRotationWindows(60); |
| |
| dag.addStream("dbrecords", poller.outputPort, writer.input); |
| } |
| |
| /** |
| * This method can be modified to have field mappings based on user defined |
| * class |
| */ |
| private List<FieldInfo> addFieldInfos() |
| { |
| List<FieldInfo> fieldInfos = Lists.newArrayList(); |
| fieldInfos.add(new FieldInfo("ACCOUNT_NO", "accountNumber", SupportType.INTEGER)); |
| fieldInfos.add(new FieldInfo("NAME", "name", SupportType.STRING)); |
| fieldInfos.add(new FieldInfo("AMOUNT", "amount", SupportType.INTEGER)); |
| return fieldInfos; |
| } |
| } |