Github user rickysaltzer commented on a diff in the pull request: https://github.com/apache/nifi/pull/2020#discussion_r130412143 --- Diff: nifi-nar-bundles/nifi-kudu-bundle/nifi-kudu-processors/src/main/java/org/apache/nifi/processors/kudu/PutKudu.java --- @@ -0,0 +1,120 @@ +/* + * 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.kudu; + +import org.apache.kudu.Schema; +import org.apache.kudu.Type; +import org.apache.kudu.client.Insert; +import org.apache.kudu.client.PartialRow; +import org.apache.kudu.client.KuduTable; + +import org.apache.nifi.annotation.behavior.EventDriven; +import org.apache.nifi.annotation.behavior.InputRequirement; +import org.apache.nifi.annotation.behavior.SupportsBatching; +import org.apache.nifi.annotation.documentation.CapabilityDescription; +import org.apache.nifi.annotation.documentation.Tags; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.processor.Relationship; +import org.apache.nifi.serialization.record.Record; + +import java.util.ArrayList; +import java.util.HashSet; +import java.util.List; +import java.util.Set; + +@EventDriven +@SupportsBatching +@InputRequirement(InputRequirement.Requirement.INPUT_REQUIRED) +@Tags({"put", "database", "NoSQL", "kudu", "HDFS"}) +@CapabilityDescription("Reads records from an incoming FlowFile using the provided Record Reader, and writes those records " + + "to the specified Kudu's table. The schema for the table must be provided in the processor properties or from your source." + + " If any error occurs while reading records from the input, or writing records to Kudu, the FlowFile will be routed to failure") + +public class PutKudu extends AbstractKudu { + + @Override + protected List<PropertyDescriptor> getSupportedPropertyDescriptors() { + final List<PropertyDescriptor> properties = new ArrayList<>(); + properties.add(KUDU_MASTERS); + properties.add(TABLE_NAME); + properties.add(SKIP_HEAD_LINE); + properties.add(RECORD_READER); + + return properties; + } + + @Override + public Set<Relationship> getRelationships() { + final Set<Relationship> rels = new HashSet<>(); + rels.add(REL_SUCCESS); + rels.add(REL_FAILURE); + return rels; + } + + @Override + protected Insert insertRecordToKudu(KuduTable kuduTable, Record record, List<String> fieldNames) throws IllegalStateException, Exception { + Insert insert = kuduTable.newInsert(); + PartialRow row = insert.getRow(); + Schema colSchema = kuduTable.getSchema(); + + for (String colName : fieldNames) { + int colIdx = this.getColumnIndex(colSchema, colName); + if (colIdx != -1) { + Type colType = colSchema.getColumnByIndex(colIdx).getType(); + + switch (colType.getDataType()) { + case BOOL: + row.addBoolean(colIdx, record.getAsBoolean(colName)); + break; + case FLOAT: + row.addFloat(colIdx, record.getAsFloat(colName)); + break; + case DOUBLE: + row.addDouble(colIdx, record.getAsDouble(colName)); + break; + case BINARY: + row.addBinary(colIdx, record.getAsString(colName).getBytes()); + break; + case INT8: + case INT16: --- End diff -- You can cast it from `int` to `short` before calling `addShort(..)`. If the user is using an `int` field to store a value inclusive of a `short` range then it's safe to cast. If the user is storing something outside the range of a `short` then an `Exception` will be thrown. I think this is a better approach since it allows users to utilize the `INT8` and `INT16` column types if they are able to guarantee that they're in contract with those value ranges.
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