| /** |
| * 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.malhar.sql.table; |
| |
| import java.util.Map; |
| |
| import org.apache.apex.malhar.lib.fs.GenericFileOutputOperator; |
| import org.apache.apex.malhar.sql.operators.LineReader; |
| import org.apache.apex.malhar.sql.operators.OperatorUtils; |
| import org.apache.apex.malhar.sql.planner.RelInfo; |
| import org.apache.calcite.adapter.java.JavaTypeFactory; |
| import org.apache.calcite.rel.type.RelDataType; |
| import org.apache.calcite.rel.type.RelDataTypeFactory; |
| import org.apache.hadoop.classification.InterfaceStability; |
| |
| import com.google.common.collect.ImmutableMap; |
| import com.google.common.collect.Lists; |
| |
| import com.datatorrent.api.DAG; |
| import com.datatorrent.api.Operator; |
| |
| /** |
| * This is an implementation of {@link Endpoint} which defined how data should be read/written to file system. |
| * |
| * @since 3.6.0 |
| */ |
| @InterfaceStability.Evolving |
| public class FileEndpoint implements Endpoint |
| { |
| public static final String FILE_INPUT_DIRECTORY = "directory"; |
| public static final String FILE_OUT_PATH = "outputFilePath"; |
| public static final String FILE_OUT_NAME = "outputFileName"; |
| |
| private MessageFormat messageFormat; |
| |
| private Map<String, Object> operands; |
| |
| public FileEndpoint() |
| { |
| } |
| |
| public FileEndpoint(String directory, MessageFormat messageFormat) |
| { |
| this.messageFormat = messageFormat; |
| this.operands = ImmutableMap.<String, Object>of(FILE_INPUT_DIRECTORY, directory); |
| } |
| |
| public FileEndpoint(String directory, String fileName, MessageFormat messageFormat) |
| { |
| this.messageFormat = messageFormat; |
| this.operands = ImmutableMap.<String, Object>of(FILE_OUT_PATH, directory, FILE_OUT_NAME, fileName); |
| } |
| |
| @Override |
| public EndpointType getTargetType() |
| { |
| return EndpointType.FILE; |
| } |
| |
| @Override |
| public void setEndpointOperands(Map<String, Object> operands) |
| { |
| this.operands = operands; |
| } |
| |
| @Override |
| public void setMessageFormat(MessageFormat messageFormat) |
| { |
| this.messageFormat = messageFormat; |
| } |
| |
| @Override |
| public RelInfo populateInputDAG(DAG dag, JavaTypeFactory typeFactory) |
| { |
| LineReader fileInput = dag.addOperator(OperatorUtils.getUniqueOperatorName("FileInput"), LineReader.class); |
| fileInput.setDirectory((String)operands.get(FILE_INPUT_DIRECTORY)); |
| |
| RelInfo spec = messageFormat.populateInputDAG(dag, typeFactory); |
| dag.addStream(OperatorUtils.getUniqueStreamName("File", "Parser"), fileInput.output, spec.getInputPorts().get(0)); |
| return new RelInfo("Input", Lists.<Operator.InputPort>newArrayList(), spec.getOperator(), spec.getOutPort(), |
| messageFormat.getRowType(typeFactory)); |
| } |
| |
| @Override |
| public RelInfo populateOutputDAG(DAG dag, JavaTypeFactory typeFactory) |
| { |
| RelInfo spec = messageFormat.populateOutputDAG(dag, typeFactory); |
| |
| GenericFileOutputOperator.StringFileOutputOperator fileOutput = |
| dag.addOperator(OperatorUtils.getUniqueOperatorName("FileOutput"), |
| GenericFileOutputOperator.StringFileOutputOperator.class); |
| fileOutput.setFilePath((String)operands.get(FILE_OUT_PATH)); |
| fileOutput.setOutputFileName((String)operands.get(FILE_OUT_NAME)); |
| |
| dag.addStream(OperatorUtils.getUniqueStreamName("Formatter", "File"), spec.getOutPort(), fileOutput.input); |
| |
| return new RelInfo("Output", spec.getInputPorts(), spec.getOperator(), null, messageFormat.getRowType(typeFactory)); |
| } |
| |
| @Override |
| public RelDataType getRowType(RelDataTypeFactory typeFactory) |
| { |
| return messageFormat.getRowType(typeFactory); |
| } |
| } |