timeabarna commented on code in PR #6838: URL: https://github.com/apache/nifi/pull/6838#discussion_r1086532914
########## nifi-toolkit/nifi-toolkit-kafka-migrator/src/main/java/org/apache/nifi/toolkit/kafkamigrator/service/KafkaMigrationService.java: ########## @@ -0,0 +1,71 @@ +/* + * 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.toolkit.kafkamigrator.service; + +import org.apache.commons.lang3.StringUtils; +import org.apache.nifi.toolkit.kafkamigrator.migrator.Migrator; +import org.w3c.dom.Document; +import org.w3c.dom.Element; +import org.w3c.dom.Node; +import org.w3c.dom.NodeList; + +import javax.xml.xpath.XPath; +import javax.xml.xpath.XPathConstants; +import javax.xml.xpath.XPathExpressionException; +import javax.xml.xpath.XPathFactory; + +import org.apache.nifi.toolkit.kafkamigrator.MigratorConfiguration.MigratorConfigurationBuilder; + +public interface KafkaMigrationService { + + String REGEX_FOR_REPLACEABLE_PROCESSOR_NAMES = "(Get|Put|Consume|Publish)Kafka(Record)?(_0_1\\d)?"; + boolean IS_VERSION_EIGHT_PROCESSOR = Boolean.TRUE; + boolean IS_NOT_VERSION_EIGHT_PROCESSOR = Boolean.FALSE; + + String getPathForProcessors(); + String getPathForClass(); + Migrator createPublishMigrator(final MigratorConfigurationBuilder configurationBuilder); + Migrator createConsumeMigrator(final MigratorConfigurationBuilder configurationBuilder); + Migrator createVersionEightPublishMigrator(final MigratorConfigurationBuilder configurationBuilder); + Migrator createVersionEightConsumeMigrator(final MigratorConfigurationBuilder configurationBuilder); + + default void replaceKafkaProcessors(final Document document, final MigratorConfigurationBuilder configurationBuilder) throws XPathExpressionException { + Migrator migrator; + final XPath xPath = XPathFactory.newInstance().newXPath(); + + final NodeList processors = (NodeList) xPath.evaluate(getPathForProcessors(), document, XPathConstants.NODESET); + for (int i = 0; i < processors.getLength(); i++) { + final Node processor = processors.item(i); + final Element className = ((Element) xPath.evaluate(getPathForClass(), processor, XPathConstants.NODE)); + final String processorName = StringUtils.substringAfterLast(className.getTextContent(), "."); + + if (processorName.matches(REGEX_FOR_REPLACEABLE_PROCESSOR_NAMES)) { + if (processorName.contains("Publish")) { + migrator = createPublishMigrator(configurationBuilder); Review Comment: Because this is a single purpose built tool a change in the process is not expected (might be added later if required. -- 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
