| /* |
| * 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 java.util.Collections; |
| import java.util.List; |
| import java.util.Set; |
| |
| 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.behavior.InputRequirement.Requirement; |
| 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.expression.ExpressionLanguageScope; |
| 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; |
| |
| @EventDriven |
| @SupportsBatching |
| @Tags({"test", "load", "duplicate"}) |
| @InputRequirement(Requirement.INPUT_REQUIRED) |
| @CapabilityDescription("Intended for load testing, this processor will create the configured number of copies of each incoming FlowFile. The original FlowFile as well as all " |
| + "generated copies are sent to the 'success' relationship. In addition, each FlowFile gets an attribute 'copy.index' set to the copy number, where the original FlowFile gets " |
| + "a value of zero, and all copies receive incremented integer values.") |
| @WritesAttributes({ |
| @WritesAttribute(attribute = "copy.index", description = "A zero-based incrementing integer value based on which copy the FlowFile is.") |
| }) |
| public class DuplicateFlowFile extends AbstractProcessor { |
| |
| public static final String COPY_INDEX_ATTRIBUTE = "copy.index"; |
| |
| static final PropertyDescriptor NUM_COPIES = new PropertyDescriptor.Builder() |
| .name("Number of Copies") |
| .displayName("Number of Copies") |
| .description("Specifies how many copies of each incoming FlowFile will be made") |
| .required(true) |
| .expressionLanguageSupported(ExpressionLanguageScope.FLOWFILE_ATTRIBUTES) |
| .defaultValue("100") |
| .addValidator(StandardValidators.NON_NEGATIVE_INTEGER_VALIDATOR) |
| .build(); |
| |
| static final Relationship REL_SUCCESS = new Relationship.Builder() |
| .name("success") |
| .description("The original FlowFile and all copies will be sent to this relationship") |
| .build(); |
| |
| @Override |
| public Set<Relationship> getRelationships() { |
| return Collections.singleton(REL_SUCCESS); |
| } |
| |
| @Override |
| protected List<PropertyDescriptor> getSupportedPropertyDescriptors() { |
| return Collections.singletonList(NUM_COPIES); |
| } |
| |
| @Override |
| public void onTrigger(final ProcessContext context, final ProcessSession session) throws ProcessException { |
| FlowFile flowFile = session.get(); |
| if (flowFile == null) { |
| return; |
| } |
| |
| for (int i = 1; i <= context.getProperty(NUM_COPIES).evaluateAttributeExpressions(flowFile).asInteger(); i++) { |
| FlowFile copy = session.clone(flowFile); |
| copy = session.putAttribute(copy, COPY_INDEX_ATTRIBUTE, Integer.toString(i)); |
| session.transfer(copy, REL_SUCCESS); |
| } |
| |
| flowFile = session.putAttribute(flowFile, COPY_INDEX_ATTRIBUTE, "0"); |
| session.transfer(flowFile, REL_SUCCESS); |
| } |
| |
| } |