| /* |
| 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.plc4x.nifi; |
| |
| import org.apache.nifi.annotation.behavior.InputRequirement; |
| import org.apache.nifi.annotation.behavior.ReadsAttribute; |
| import org.apache.nifi.annotation.behavior.ReadsAttributes; |
| import org.apache.nifi.annotation.behavior.TriggerSerially; |
| import org.apache.nifi.annotation.documentation.CapabilityDescription; |
| import org.apache.nifi.annotation.documentation.Tags; |
| import org.apache.nifi.flowfile.FlowFile; |
| import org.apache.nifi.processor.ProcessContext; |
| import org.apache.nifi.processor.ProcessSession; |
| import org.apache.nifi.processor.exception.ProcessException; |
| import org.apache.plc4x.java.api.PlcConnection; |
| import org.apache.plc4x.java.api.messages.PlcWriteRequest; |
| import org.apache.plc4x.java.api.messages.PlcWriteResponse; |
| |
| import java.util.concurrent.CompletableFuture; |
| |
| @TriggerSerially |
| @Tags({"plc4x-sink"}) |
| @InputRequirement(InputRequirement.Requirement.INPUT_REQUIRED) |
| @CapabilityDescription("Processor able to write data to industrial PLCs using Apache PLC4X") |
| @ReadsAttributes({@ReadsAttribute(attribute="value", description="some value")}) |
| public class Plc4xSinkProcessor extends BasePlc4xProcessor { |
| |
| @Override |
| public void onTrigger(final ProcessContext context, final ProcessSession session) throws ProcessException { |
| FlowFile flowFile = session.get(); |
| |
| // Abort if there's nothing to do. |
| if (flowFile == null) { |
| return; |
| } |
| |
| // Get an instance of a component able to write to a PLC. |
| PlcConnection connection = getConnection(); |
| if (!connection.getMetadata().canWrite()) { |
| throw new ProcessException("Writing not supported by connection"); |
| } |
| |
| // Prepare the request. |
| PlcWriteRequest.Builder builder = connection.writeRequestBuilder(); |
| flowFile.getAttributes().forEach((field, value) -> { |
| String address = getAddress(field); |
| if(address != null) { |
| builder.addItem(field, address, value); |
| } |
| }); |
| PlcWriteRequest writeRequest = builder.build(); |
| |
| // Send the request to the PLC. |
| CompletableFuture<? extends PlcWriteResponse> future = writeRequest.execute(); |
| future.whenComplete((response, throwable) -> { |
| if (throwable != null) { |
| session.transfer(session.create(), FAILURE); |
| } else { |
| session.transfer(session.create(), SUCCESS); |
| } |
| }); |
| } |
| |
| } |