| /* |
| * 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.streampipes.pe.examples.jvm.staticproperty; |
| |
| import org.apache.streampipes.model.graph.DataProcessorDescription; |
| import org.apache.streampipes.model.graph.DataProcessorInvocation; |
| import org.apache.streampipes.pe.examples.jvm.base.DummyEngine; |
| import org.apache.streampipes.pe.examples.jvm.base.DummyParameters; |
| import org.apache.streampipes.sdk.StaticProperties; |
| import org.apache.streampipes.sdk.builder.ProcessingElementBuilder; |
| import org.apache.streampipes.sdk.builder.StreamRequirementsBuilder; |
| import org.apache.streampipes.sdk.extractor.ProcessingElementParameterExtractor; |
| import org.apache.streampipes.sdk.helpers.EpRequirements; |
| import org.apache.streampipes.sdk.helpers.Labels; |
| import org.apache.streampipes.sdk.helpers.OutputStrategies; |
| import org.apache.streampipes.sdk.helpers.SupportedFormats; |
| import org.apache.streampipes.sdk.helpers.SupportedProtocols; |
| import org.apache.streampipes.wrapper.standalone.ConfiguredEventProcessor; |
| import org.apache.streampipes.wrapper.standalone.declarer.StandaloneEventProcessingDeclarer; |
| |
| import java.util.List; |
| |
| public class CollectionExampleController extends StandaloneEventProcessingDeclarer<DummyParameters> { |
| |
| @Override |
| public DataProcessorDescription declareModel() { |
| return ProcessingElementBuilder.create("org.apache.streampipes.examples.staticproperty" + |
| ".collection", "Collection Example", "") |
| .requiredStream(StreamRequirementsBuilder. |
| create() |
| .requiredProperty(EpRequirements.anyProperty()) |
| .build()) |
| .outputStrategy(OutputStrategies.keep()) |
| .supportedProtocols(SupportedProtocols.kafka()) |
| .supportedFormats(SupportedFormats.jsonFormat()) |
| |
| // create a collection parameter |
| .requiredParameterAsCollection(Labels.from("collection", "Example Name", "Example " + |
| "Description"), StaticProperties.stringFreeTextProperty(Labels |
| .from("text-property","Text",""))) |
| .build(); |
| } |
| |
| @Override |
| public ConfiguredEventProcessor<DummyParameters> onInvocation(DataProcessorInvocation graph, ProcessingElementParameterExtractor extractor) { |
| |
| // Extract the text parameter value |
| List<String> textParameters = extractor.singleValueParameterFromCollection("collection", String.class); |
| |
| // now the text parameter would be added to a parameter class (omitted for this example) |
| |
| return new ConfiguredEventProcessor<>(new DummyParameters(graph), DummyEngine::new); |
| } |
| } |