Github user mattyb149 commented on a diff in the pull request: https://github.com/apache/nifi/pull/850#discussion_r75044175 --- Diff: nifi-nar-bundles/nifi-hadoop-bundle/nifi-hdfs-processors/src/main/java/org/apache/nifi/processors/hadoop/DeleteHDFS.java --- @@ -0,0 +1,161 @@ +/* + * 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.hadoop; + +import java.io.IOException; +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashSet; +import java.util.List; +import java.util.Map; +import java.util.Set; + +import org.apache.hadoop.fs.FileStatus; +import org.apache.hadoop.fs.FileSystem; +import org.apache.hadoop.fs.Path; +import org.apache.nifi.annotation.behavior.InputRequirement; +import org.apache.nifi.annotation.behavior.TriggerWhenEmpty; +import org.apache.nifi.annotation.documentation.CapabilityDescription; +import org.apache.nifi.annotation.documentation.Tags; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.flowfile.FlowFile; +import org.apache.nifi.processor.ProcessContext; +import org.apache.nifi.processor.ProcessSession; +import org.apache.nifi.processor.Relationship; +import org.apache.nifi.processor.exception.ProcessException; +import org.apache.nifi.processor.util.StandardValidators; + +import com.google.common.collect.Lists; +import com.google.common.collect.Maps; + +@TriggerWhenEmpty +@InputRequirement(InputRequirement.Requirement.INPUT_ALLOWED) +@Tags({ "hadoop", "HDFS", "delete", "remove", "filesystem" }) +@CapabilityDescription("Deletes a file from HDFS. The file can be provided as an attribute from an incoming FlowFile, " + + "or a statically set file that is periodically removed. If this processor has an incoming connection, it" + + "will ignore running on a periodic basis and instead rely on incoming FlowFiles to trigger a delete. " + + "Optionally, you may specify use a wildcard character to match multiple files or directories.") +public class DeleteHDFS extends AbstractHadoopProcessor { + public static final Relationship REL_SUCCESS = new Relationship.Builder() + .name("success") + .description("FlowFiles will be routed here if the delete command was successful") + .build(); + + public static final Relationship REL_FAILURE = new Relationship.Builder() + .name("failure") + .description("FlowFiles will be routed here if the delete command was unsuccessful") + .build(); + + public static final PropertyDescriptor FILE_OR_DIRECTORY = new PropertyDescriptor.Builder() + .name("File or Directory") --- End diff -- Not a requirement, but lately it's been suggested to use displayName() in the PropertyDescriptor.Builder() for the "friendly" name, and name() as something more machine friendly, as we move towards internationalization.
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