Lehel44 commented on a change in pull request #4948: URL: https://github.com/apache/nifi/pull/4948#discussion_r664551521
########## File path: nifi-nar-bundles/nifi-scripting-bundle/nifi-scripting-processors/src/main/java/org/apache/nifi/processors/script/ScriptedPartitionRecord.java ########## @@ -0,0 +1,232 @@ +/* + * 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.script; + +import org.apache.nifi.annotation.behavior.EventDriven; +import org.apache.nifi.annotation.behavior.Restricted; +import org.apache.nifi.annotation.behavior.Restriction; +import org.apache.nifi.annotation.behavior.SideEffectFree; +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.components.PropertyDescriptor; +import org.apache.nifi.components.RequiredPermission; +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.io.InputStreamCallback; +import org.apache.nifi.schema.access.SchemaNotFoundException; +import org.apache.nifi.serialization.MalformedRecordException; +import org.apache.nifi.serialization.RecordReader; +import org.apache.nifi.serialization.RecordReaderFactory; +import org.apache.nifi.serialization.RecordSetWriter; +import org.apache.nifi.serialization.RecordSetWriterFactory; +import org.apache.nifi.serialization.record.PushBackRecordSet; +import org.apache.nifi.serialization.record.Record; +import org.apache.nifi.serialization.record.RecordSchema; +import org.apache.nifi.serialization.record.RecordSet; + +import javax.script.ScriptEngine; +import javax.script.ScriptException; +import java.io.IOException; +import java.io.InputStream; +import java.io.OutputStream; +import java.util.HashMap; +import java.util.HashSet; +import java.util.List; +import java.util.Map; +import java.util.Set; +import java.util.function.BiFunction; + +@EventDriven +@SideEffectFree +@Tags({"record", "partition", "script", "groovy", "jython", "python", "segment", "split", "group", "organize"}) +@CapabilityDescription("Receives Record-oriented data (i.e., data that can be read by the configured Record Reader) and evaluates the user provided script against " + + "each record in the incoming flow file. Each record is then grouped with other records sharing the same partition and a FlowFile is created for each groups of records. " + + "Two records shares the same partition if the evaluation of the script results the same return value for both. Those will be considered as part of the same partition.") +@Restricted(restrictions = { + @Restriction(requiredPermission = RequiredPermission.EXECUTE_CODE, + explanation = "Provides operator the ability to execute arbitrary code assuming all permissions that NiFi has.") +}) +@WritesAttributes({ + @WritesAttribute(attribute = "partition", description = "The partition of the outgoing flow file."), + @WritesAttribute(attribute = "mime.type", description = "Sets the mime.type attribute to the MIME Type specified by the Record Writer"), + @WritesAttribute(attribute = "record.count", description = "The number of records within the flow file."), + @WritesAttribute(attribute = "record.error.message", description = "This attribute provides on failure the error message encountered by the Reader or Writer."), + @WritesAttribute(attribute = "fragment.index", description = "A one-up number that indicates the ordering of the partitioned FlowFiles that were created from a single parent FlowFile"), + @WritesAttribute(attribute = "fragment.count", description = "The number of partitioned FlowFiles generated from the parent FlowFile") +}) +@SeeAlso(classNames = { + "org.apache.nifi.processors.script.ScriptedTransformRecord", + "org.apache.nifi.processors.script.ScriptedRouteRecord", + "org.apache.nifi.processors.script.ScriptedValidateRecord", + "org.apache.nifi.processors.script.ScriptedFilterRecord" +}) +public class ScriptedPartitionRecord extends ScriptedProcessor { + + static final Relationship RELATIONSHIP_SUCCESS = new Relationship.Builder() + .name("success") + .description("FlowFiles that are successfully partitioned will be routed to this relationship") + .build(); + static final Relationship RELATIONSHIP_ORIGINAL = new Relationship.Builder() + .name("original") + .description("Once all records in an incoming FlowFile have been partitioned, the original FlowFile is routed to this relationship.") + .build(); + static final Relationship RELATIONSHIP_FAILURE = new Relationship.Builder() + .name("failure") + .description("If a FlowFile cannot be partitioned from the configured input format to the configured output format, " + + "the unchanged FlowFile will be routed to this relationship") + .build(); + + private static Set<Relationship> RELATIONSHIPS = new HashSet<>(); + + static { + RELATIONSHIPS.add(RELATIONSHIP_ORIGINAL); + RELATIONSHIPS.add(RELATIONSHIP_SUCCESS); + RELATIONSHIPS.add(RELATIONSHIP_FAILURE); + } + + @Override + public Set<Relationship> getRelationships() { + return RELATIONSHIPS; + } + + @Override + protected List<PropertyDescriptor> getSupportedPropertyDescriptors() { + return DESCRIPTORS; + } + + @Override + public void onTrigger(final ProcessContext context, final ProcessSession session) throws ProcessException { + final FlowFile flowFile = session.get(); + if (flowFile == null) { + return; + } + + final ScriptRunner scriptRunner = pollScriptRunner(); + if (scriptRunner == null) { + // This shouldn't happen. But just in case. + session.rollback(); + return; + } + + boolean success = false; Review comment: I understand your point, too. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@nifi.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org