Github user jskora commented on a diff in the pull request:
https://github.com/apache/nifi/pull/113#discussion_r43789596
--- Diff:
nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/ListFile.java
---
@@ -0,0 +1,378 @@
+/*
+ * 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.nifi.processors.standard;
+
+import org.apache.nifi.annotation.behavior.TriggerSerially;
+import org.apache.nifi.annotation.behavior.TriggerWhenEmpty;
+import org.apache.nifi.annotation.behavior.WritesAttribute;
+import org.apache.nifi.annotation.behavior.WritesAttributes;
+import org.apache.nifi.annotation.documentation.CapabilityDescription;
+import org.apache.nifi.annotation.documentation.SeeAlso;
+import org.apache.nifi.annotation.documentation.Tags;
+import org.apache.nifi.annotation.lifecycle.OnScheduled;
+import org.apache.nifi.components.PropertyDescriptor;
+import org.apache.nifi.flowfile.attributes.CoreAttributes;
+import org.apache.nifi.processor.DataUnit;
+import org.apache.nifi.processor.ProcessContext;
+import org.apache.nifi.processor.ProcessorInitializationContext;
+import org.apache.nifi.processor.Relationship;
+import org.apache.nifi.processor.util.StandardValidators;
+import org.apache.nifi.processors.standard.util.FileInfo;
+
+import java.io.File;
+import java.io.FileFilter;
+import java.io.IOException;
+import java.nio.file.FileStore;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.attribute.BasicFileAttributeView;
+import java.nio.file.attribute.BasicFileAttributes;
+import java.nio.file.attribute.FileOwnerAttributeView;
+import java.nio.file.attribute.PosixFileAttributeView;
+import java.nio.file.attribute.PosixFilePermissions;
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicReference;
+import java.util.regex.Pattern;
+
+@TriggerSerially
+@TriggerWhenEmpty
+@Tags({"file", "get", "list", "ingest", "source", "filesystem"})
+@CapabilityDescription("Retrieves a listing of files from the local
filesystem. For each file that is listed, " +
+ "creates a FlowFile that represents the file so that it can be
fetched in conjunction with ListFile. This " +
+ "Processor is designed to run on Primary Node only in a cluster.
If the primary node changes, the new " +
+ "Primary Node will pick up where the previous node left off
without duplicating all of the data. Unlike " +
+ "GetFile, this Processor does not delete any data from the local
filesystem.")
+@WritesAttributes({
+ @WritesAttribute(attribute="filename", description="The name of
the file that was read from filesystem."),
+ @WritesAttribute(attribute="path", description="The path is set to
the absolute path of the file's directory " +
+ "on filesystem. For example, if the Directory property is
set to /tmp, then files picked up from " +
+ "/tmp will have the path attribute set to \"./\". If the
Recurse Subdirectories property is set to " +
+ "true and a file is picked up from /tmp/abc/1/2/3, then
the path attribute will be set to " +
+ "\"/tmp/abc/1/2/3\"."),
+ @WritesAttribute(attribute="fs.owner", description="The user that
owns the file in filesystem"),
+ @WritesAttribute(attribute="fs.group", description="The group that
owns the file in filesystem"),
+ @WritesAttribute(attribute="fs.lastModified", description="The
timestamp of when the file in filesystem was " +
+ "last modified, as milliseconds since midnight Jan 1, 1970
UTC"),
+ @WritesAttribute(attribute="fs.length", description="The number of
bytes in the file in filesystem"),
+ @WritesAttribute(attribute="fs.permissions", description="The
permissions for the file in filesystem. This " +
+ "is formatted as 3 characters for the owner, 3 for the
group, and 3 for other users. For example " +
+ "rw-rw-r--")
+})
+@SeeAlso({GetFile.class, PutFile.class})
+public class ListFile extends AbstractListProcessor<FileInfo> {
+
+ public static final PropertyDescriptor DIRECTORY = new
PropertyDescriptor.Builder()
+ .name("Input Directory")
+ .description("The input directory from which files to pull
files")
+ .required(true)
+
.addValidator(StandardValidators.createDirectoryExistsValidator(true, false))
+ .expressionLanguageSupported(true)
+ .build();
+
+ public static final PropertyDescriptor RECURSE = new
PropertyDescriptor.Builder()
+ .name("Recurse Subdirectories")
+ .description("Indicates whether to list files from
subdirectories of the directory")
+ .required(true)
+ .allowableValues("true", "false")
+ .defaultValue("true")
+ .build();
+
+ public static final PropertyDescriptor FILE_FILTER = new
PropertyDescriptor.Builder()
+ .name("File Filter")
+ .description("Only files whose names match the given regular
expression will be picked up")
+ .required(true)
+ .defaultValue("[^\\.].*")
+ .addValidator(StandardValidators.REGULAR_EXPRESSION_VALIDATOR)
+ .build();
+
+ public static final PropertyDescriptor PATH_FILTER = new
PropertyDescriptor.Builder()
+ .name("Path Filter")
+ .description("When " + RECURSE.getName() + " is true, then
only subdirectories whose path matches the given regular expression will be
scanned")
+ .required(false)
+ .addValidator(StandardValidators.REGULAR_EXPRESSION_VALIDATOR)
+ .build();
+
+
+ public static final PropertyDescriptor MIN_AGE = new
PropertyDescriptor.Builder()
+ .name("Minimum File Age")
+ .description("The minimum age that a file must be in order to
be pulled; any file younger than this amount of time (according to last
modification date) will be ignored")
+ .required(true)
+ .addValidator(StandardValidators.TIME_PERIOD_VALIDATOR)
+ .defaultValue("0 sec")
+ .build();
+
+ public static final PropertyDescriptor MAX_AGE = new
PropertyDescriptor.Builder()
+ .name("Maximum File Age")
+ .description("The maximum age that a file must be in order to
be pulled; any file older than this amount of time (according to last
modification date) will be ignored")
+ .required(false)
+
.addValidator(StandardValidators.createTimePeriodValidator(100,
TimeUnit.MILLISECONDS, Long.MAX_VALUE, TimeUnit.NANOSECONDS))
+ .build();
+
+ public static final PropertyDescriptor MIN_SIZE = new
PropertyDescriptor.Builder()
+ .name("Minimum File Size")
+ .description("The minimum size that a file must be in order to
be pulled")
+ .required(true)
+ .addValidator(StandardValidators.DATA_SIZE_VALIDATOR)
+ .defaultValue("0 B")
+ .build();
+
+ public static final PropertyDescriptor MAX_SIZE = new
PropertyDescriptor.Builder()
+ .name("Maximum File Size")
+ .description("The maximum size that a file can be in order to
be pulled")
+ .required(false)
+ .addValidator(StandardValidators.DATA_SIZE_VALIDATOR)
+ .build();
+
+ public static final PropertyDescriptor IGNORE_HIDDEN_FILES = new
PropertyDescriptor.Builder()
+ .name("Ignore Hidden Files")
+ .description("Indicates whether or not hidden files should be
ignored")
+ .allowableValues("true", "false")
+ .defaultValue("true")
+ .required(true)
+ .build();
+
+ private List<PropertyDescriptor> properties;
--- End diff --
Ok, it still makes sense. I'll add that to the list.
Is this a pattern that should be cleaned up globally?
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