ChrisSamo632 commented on a change in pull request #5193: URL: https://github.com/apache/nifi/pull/5193#discussion_r676386896
########## File path: nifi-nar-bundles/nifi-elasticsearch-bundle/nifi-elasticsearch-restapi-processors/src/main/java/org/apache/nifi/processors/elasticsearch/PaginatedJsonQueryElasticsearch.java ########## @@ -0,0 +1,90 @@ +/* + * 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.annotation.behavior.EventDriven; +import org.apache.nifi.annotation.behavior.InputRequirement; +import org.apache.nifi.annotation.behavior.SystemResource; +import org.apache.nifi.annotation.behavior.SystemResourceConsideration; +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.Tags; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.elasticsearch.SearchResponse; +import org.apache.nifi.flowfile.FlowFile; +import org.apache.nifi.processor.ProcessSession; +import org.apache.nifi.processors.elasticsearch.api.PaginatedJsonQueryParameters; + +import java.util.ArrayList; +import java.util.Collections; +import java.util.List; + +@WritesAttributes({ + @WritesAttribute(attribute = "mime.type", description = "application/json"), + @WritesAttribute(attribute = "aggregation.name", description = "The name of the aggregation whose results are in the output flowfile"), + @WritesAttribute(attribute = "aggregation.number", description = "The number of the aggregation whose results are in the output flowfile"), + @WritesAttribute(attribute = "page.number", description = "The number of the page (request) in which the results were returned that are in the output flowfile"), + @WritesAttribute(attribute = "hit.count", description = "The number of hits that are in the output flowfile") +}) +@InputRequirement(InputRequirement.Requirement.INPUT_REQUIRED) +@EventDriven +@Tags({"elasticsearch", "elasticsearch 5", "query", "scroll", "page", "read", "json"}) +@CapabilityDescription("A processor that allows the user to run a paginated query (with aggregations) written with the Elasticsearch JSON DSL. " + + "It will use the flowfile's content for the query unless the QUERY attribute is populated. " + + "Search After/Point in Time queries must include a valid \"sort\" field.") +@SystemResourceConsideration(resource = SystemResource.MEMORY, description = "Care should be taken on the size of each page because each response " + + "from Elasticsearch will be loaded into memory all at once and converted into the resulting flowfiles.") +public class PaginatedJsonQueryElasticsearch extends AbstractPaginatedJsonQueryElasticsearch implements ElasticsearchRestProcessor { + private static final List<PropertyDescriptor> propertyDescriptors; + + static { + final List<PropertyDescriptor> descriptors = new ArrayList<>(); + descriptors.add(QUERY); + descriptors.addAll(paginatedPropertyDescriptors); + + propertyDescriptors = Collections.unmodifiableList(descriptors); + } + + @Override + public final List<PropertyDescriptor> getSupportedPropertyDescriptors() { + return propertyDescriptors; + } + + @Override + void finishQuery(final FlowFile input, final PaginatedJsonQueryParameters paginatedQueryJsonParameters, Review comment: (as above) -- 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
