streampipes-pipeline-elements-examples-processors-jvm/src/main/java/org/apache/streampipes/pe/examples/jvm/staticproperty/StaticPropertyAlternativesController.java

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 * 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
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package org.apache.streampipes.pe.examples.jvm.staticproperty;

import org.apache.streampipes.extensions.api.pe.IStreamPipesDataProcessor;
import org.apache.streampipes.extensions.api.pe.context.EventProcessorRuntimeContext;
import org.apache.streampipes.extensions.api.pe.param.IDataProcessorParameters;
import org.apache.streampipes.extensions.api.pe.routing.SpOutputCollector;
import org.apache.streampipes.model.runtime.Event;
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.builder.processor.DataProcessorConfiguration;
import org.apache.streampipes.sdk.helpers.Alternatives;
import org.apache.streampipes.sdk.helpers.EpRequirements;
import org.apache.streampipes.sdk.helpers.Labels;
import org.apache.streampipes.sdk.helpers.Options;
import org.apache.streampipes.sdk.helpers.OutputStrategies;
import org.apache.streampipes.sdk.helpers.SupportedFormats;
import org.apache.streampipes.sdk.helpers.SupportedProtocols;

public class StaticPropertyAlternativesController implements IStreamPipesDataProcessor {

  private static final String KafkaHost = "kafka-host";
  private static final String KafkaPort = "kafka-port";

  @Override
  public DataProcessorConfiguration declareConfig() {
    return DataProcessorConfiguration.create(
        StaticPropertyAlternativesController::new,
        ProcessingElementBuilder.create("org.apache.streampipes.examples.staticproperty" +
                ".alternatives", "Static property alternatives example", "")
            .requiredStream(StreamRequirementsBuilder.
                create()
                .requiredProperty(EpRequirements.anyProperty())
                .build())
            .outputStrategy(OutputStrategies.keep())
            .supportedProtocols(SupportedProtocols.kafka())
            .supportedFormats(SupportedFormats.jsonFormat())
            .requiredTextParameter(Labels.from(KafkaHost, "Kafka Host", ""))

            .requiredAlternatives(Labels.from("window", "Window", ""),
                Alternatives.from(Labels.from("count", "Count Window", ""),
                    StaticProperties.integerFreeTextProperty(Labels.from("count-window-size",
                        "Count Window Size", ""))),
                Alternatives.from(Labels.from("time", "Time Window", ""),
                    StaticProperties.group(Labels.from("group", "", ""),
                        StaticProperties.integerFreeTextProperty(Labels.from("time" +
                            "-window-size", "Time Window Size", "")),
                        StaticProperties.singleValueSelection(Labels.from("time" +
                                "-window-unit", "Time Unit", ""),
                            Options.from("Seconds", "Minutes", "Hours")))))
            .build()
    );
  }

  @Override
  public void onPipelineStarted(IDataProcessorParameters params, SpOutputCollector collector, EventProcessorRuntimeContext runtimeContext) {
    var extractor = params.extractor();
    String selectedAlternative = extractor.selectedAlternativeInternalId("window");
    if (selectedAlternative.equals("time")) {
      Integer timeWindowSize = extractor.singleValueParameter("time-window-size", Integer.class);
    }

  }

  @Override
  public void onEvent(Event event, SpOutputCollector collector) {

  }

  @Override
  public void onPipelineStopped() {

  }

}