| /** |
| * 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.io; |
| |
| import java.io.BufferedReader; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.net.URI; |
| import java.util.Map; |
| |
| import javax.validation.constraints.NotNull; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.commons.net.ftp.FTP; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.fs.ftp.FTPFileSystem; |
| |
| import com.datatorrent.api.DefaultOutputPort; |
| import com.datatorrent.lib.io.fs.AbstractFileInputOperator; |
| |
| /** |
| * An {@link AbstractFileInputOperator} that scans a remote directory via FTP for new files.<br/> |
| * Files are then split in tuples which are emitted out. |
| * <p/> |
| * Configurations:<br/> |
| * {@link #host} : ftp server host.<br/> |
| * {@link #port} : ftp server port. default: {@link FTP#DEFAULT_PORT }<br/> |
| * {@link #userName} : username used for login to the server. default: anonymous<br/> |
| * {@link #password} : password used for login to the server. default: guest<br/> |
| * <p/> |
| * |
| * @param <T> type of tuple. |
| * @displayName FTP Directory Input |
| * @category Input |
| * @tags ftp |
| * |
| * @since 2.0.0 |
| */ |
| @org.apache.hadoop.classification.InterfaceStability.Evolving |
| public abstract class AbstractFTPInputOperator<T> extends AbstractFileInputOperator<T> |
| { |
| @NotNull |
| private String host; |
| |
| private int port; |
| |
| private String userName; |
| |
| private String password; |
| |
| public AbstractFTPInputOperator() |
| { |
| super(); |
| port = FTP.DEFAULT_PORT; |
| userName = "anonymous"; |
| password = "guest"; |
| } |
| |
| @Override |
| protected FileSystem getFSInstance() throws IOException |
| { |
| FTPFileSystem ftpFileSystem = new FTPFileSystem(); |
| String ftpUri = "ftp://" + userName + ":" + password + "@" + host + ":" + port; |
| LOG.debug("ftp uri {}", ftpUri); |
| ftpFileSystem.initialize(URI.create(ftpUri), configuration); |
| return ftpFileSystem; |
| } |
| |
| @Override |
| public void partitioned(Map<Integer, Partition<AbstractFileInputOperator<T>>> partitions) |
| { |
| super.partitioned(partitions); |
| for (Partition<AbstractFileInputOperator<T>> partition : partitions.values()) { |
| ((AbstractFTPInputOperator<T>)partition.getPartitionedInstance()).host = host; |
| ((AbstractFTPInputOperator<T>)partition.getPartitionedInstance()).port = port; |
| ((AbstractFTPInputOperator<T>)partition.getPartitionedInstance()).userName = userName; |
| ((AbstractFTPInputOperator<T>)partition.getPartitionedInstance()).password = password; |
| } |
| } |
| |
| /** |
| * Sets the ftp server host. |
| * |
| * @param host |
| */ |
| public void setHost(String host) |
| { |
| this.host = host; |
| } |
| |
| /** |
| * @return the ftp server host. |
| */ |
| public String getHost() |
| { |
| return host; |
| } |
| |
| /** |
| * Sets the ftp server port |
| * |
| * @param port |
| */ |
| public void setPort(int port) |
| { |
| this.port = port; |
| } |
| |
| /** |
| * @return the ftp server port |
| */ |
| public int getPort() |
| { |
| return port; |
| } |
| |
| /** |
| * Sets the user name which is used for login to the server. |
| * |
| * @param userName |
| */ |
| public void setUserName(String userName) |
| { |
| this.userName = userName; |
| } |
| |
| /** |
| * @return the user name |
| */ |
| public String getUserName() |
| { |
| return userName; |
| } |
| |
| /** |
| * Sets the password which is used for login to the server. |
| * |
| * @param password |
| */ |
| public void setPassword(String password) |
| { |
| this.password = password; |
| } |
| |
| /** |
| * @return the password |
| */ |
| public String getPassword() |
| { |
| return password; |
| } |
| |
| private static final Logger LOG = LoggerFactory.getLogger(AbstractFTPInputOperator.class); |
| |
| /** |
| * An {@link AbstractFTPInputOperator} that splits file into lines and emits them. |
| * |
| * @displayName FTP String Input |
| * @category Input |
| * @tags ftp |
| */ |
| public static class FTPStringInputOperator extends AbstractFTPInputOperator<String> |
| { |
| private transient BufferedReader br; |
| |
| public final transient DefaultOutputPort<String> output = new DefaultOutputPort<String>(); |
| |
| @Override |
| protected InputStream openFile(Path path) throws IOException |
| { |
| InputStream is = super.openFile(path); |
| br = new BufferedReader(new InputStreamReader(is)); |
| return is; |
| } |
| |
| @Override |
| protected void closeFile(InputStream is) throws IOException |
| { |
| super.closeFile(is); |
| br = null; |
| } |
| |
| @Override |
| protected String readEntity() throws IOException |
| { |
| return br.readLine(); |
| } |
| |
| @Override |
| protected void emit(String tuple) |
| { |
| output.emit(tuple); |
| } |
| } |
| } |