Github user ijokarumawak commented on a diff in the pull request: https://github.com/apache/nifi/pull/2737#discussion_r192614001 --- Diff: nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/RecordStats.java --- @@ -0,0 +1,176 @@ +/* + * 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.standard; + +import org.apache.nifi.annotation.behavior.InputRequirement; +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.annotation.lifecycle.OnScheduled; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.components.Validator; +import org.apache.nifi.flowfile.FlowFile; +import org.apache.nifi.processor.AbstractProcessor; +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.util.StandardValidators; +import org.apache.nifi.record.path.FieldValue; +import org.apache.nifi.record.path.RecordPath; +import org.apache.nifi.record.path.RecordPathResult; +import org.apache.nifi.record.path.util.RecordPathCache; +import org.apache.nifi.serialization.RecordReader; +import org.apache.nifi.serialization.RecordReaderFactory; +import org.apache.nifi.serialization.record.Record; + +import java.io.InputStream; +import java.util.HashMap; +import java.util.HashSet; +import java.util.Map; +import java.util.Optional; +import java.util.Set; +import java.util.stream.Collectors; + +@Tags({ "record", "stats", "metrics" }) +@CapabilityDescription("A processor that can count the number of items in a record set, as well as provide counts based on " + + "user-defined criteria on subsets of the record set.") +@InputRequirement(InputRequirement.Requirement.INPUT_REQUIRED) +@WritesAttributes({ + @WritesAttribute(attribute = RecordStats.RECORD_COUNT_ATTR, description = "A count of the records in the record set in the flowfile.") +}) +public class RecordStats extends AbstractProcessor { + static final String RECORD_COUNT_ATTR = "record_count"; + + static final PropertyDescriptor RECORD_READER = new PropertyDescriptor.Builder() + .name("record-stats-reader") + .displayName("Record Reader") + .description("A record reader to use for reading the records.") + .addValidator(Validator.VALID) --- End diff -- No validator is required for ControllerService.
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