streampipes-pipeline-elements-examples-processors-jvm/src/main/java/org/apache/streampipes/pe/examples/jvm/staticproperty/UnaryMappingPropertyExampleController.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
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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.model.schema.PropertyScope;
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.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;

public class UnaryMappingPropertyExampleController  implements IStreamPipesDataProcessor {

  @Override
  public DataProcessorConfiguration declareConfig() {
    return DataProcessorConfiguration.create(
      UnaryMappingPropertyExampleController::new,
        ProcessingElementBuilder.create("org.apache.streampipes.examples.staticproperty" +
                ".mappingunary", "Unary Mapping Property Example", "")
            .requiredStream(StreamRequirementsBuilder.
                create()
                .requiredPropertyWithUnaryMapping(EpRequirements.numberReq(),
                    Labels.from("mp-key", "My Mapping", ""),
                    PropertyScope.NONE)
                .build())
            .outputStrategy(OutputStrategies.keep())
            .supportedProtocols(SupportedProtocols.kafka())
            .supportedFormats(SupportedFormats.jsonFormat())

            .build()
    );
  }

  @Override
  public void onPipelineStarted(IDataProcessorParameters params, SpOutputCollector collector, EventProcessorRuntimeContext runtimeContext) {
    // Extract the mapping property value
    String mappingPropertySelector = params.extractor().mappingPropertyValue("mp-key");

  }

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

  }

  @Override
  public void onPipelineStopped() {

  }
}