Github user JPercivall commented on a diff in the pull request: https://github.com/apache/nifi/pull/1233#discussion_r88330726 --- Diff: nifi-nar-bundles/nifi-elasticsearch-5-bundle/nifi-elasticsearch-5-processors/src/main/java/org/apache/nifi/processors/elasticsearch/AbstractElasticsearch5TransportClientProcessor.java --- @@ -0,0 +1,289 @@ +/* + * 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.elasticsearch; + +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.components.ValidationResult; +import org.apache.nifi.components.Validator; +import org.apache.nifi.logging.ComponentLog; +import org.apache.nifi.processor.ProcessContext; +import org.apache.nifi.processor.exception.ProcessException; +import org.apache.nifi.processor.util.StandardValidators; +import org.apache.nifi.ssl.SSLContextService; +import org.apache.nifi.util.StringUtils; +import org.elasticsearch.client.Client; +import org.elasticsearch.client.transport.TransportClient; +import org.elasticsearch.common.settings.Settings; +import org.elasticsearch.common.transport.InetSocketTransportAddress; +import org.elasticsearch.transport.client.PreBuiltTransportClient; + +import java.lang.reflect.Constructor; +import java.lang.reflect.InvocationTargetException; +import java.lang.reflect.Method; +import java.net.InetSocketAddress; +import java.net.MalformedURLException; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.concurrent.atomic.AtomicReference; + + +abstract class AbstractElasticsearch5TransportClientProcessor extends AbstractElasticsearch5Processor { + + /** + * This validator ensures the Elasticsearch hosts property is a valid list of hostname:port entries + */ + private static final Validator HOSTNAME_PORT_VALIDATOR = (subject, input, context) -> { + final List<String> esList = Arrays.asList(input.split(",")); + for (String hostnamePort : esList) { + String[] addresses = hostnamePort.split(":"); + // Protect against invalid input like http://127.0.0.1:9300 (URL scheme should not be there) + if (addresses.length != 2) { + return new ValidationResult.Builder().subject(subject).input(input).explanation( + "Must be in hostname:port form (no scheme such as http://").valid(false).build(); + } + } + return new ValidationResult.Builder().subject(subject).input(input).explanation( + "Valid cluster definition").valid(true).build(); + }; + + protected static final PropertyDescriptor CLUSTER_NAME = new PropertyDescriptor.Builder() + .name("el5-cluster-name") + .displayName("Cluster Name") + .description("Name of the ES cluster (for example, elasticsearch_brew). Defaults to 'elasticsearch'") + .required(true) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .defaultValue("elasticsearch") + .build(); + + protected static final PropertyDescriptor HOSTS = new PropertyDescriptor.Builder() + .name("el5-hosts") + .displayName("ElasticSearch Hosts") + .description("ElasticSearch Hosts, which should be comma separated and colon for hostname/port " + + "host1:port,host2:port,.... For example testcluster:9300. This processor uses the Transport Client to " + + "connect to hosts. The default transport client port is 9300.") + .required(true) + .expressionLanguageSupported(false) + .addValidator(HOSTNAME_PORT_VALIDATOR) + .build(); + + public static final PropertyDescriptor PROP_XPACK_LOCATION = new PropertyDescriptor.Builder() + .name("el5-xpack-location") + .displayName("X-Pack Transport Location") + .description("Specifies the path to the JAR(s) for the Elasticsearch X-Pack Transport feature. At a minimum, this must be a " --- End diff -- Slightly confusing, property is not required but description states that "At a minimum ... " something must be set.
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