| /* |
| 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.lifecycle.OnScheduled; |
| import org.apache.nifi.components.PropertyDescriptor; |
| import org.apache.nifi.components.PropertyValue; |
| import org.apache.nifi.processor.AbstractProcessor; |
| import org.apache.nifi.processor.ProcessContext; |
| import org.apache.nifi.processor.ProcessorInitializationContext; |
| import org.apache.nifi.processor.Relationship; |
| import org.apache.nifi.processor.util.StandardValidators; |
| import org.apache.plc4x.java.PlcDriverManager; |
| import org.apache.plc4x.java.api.PlcConnection; |
| import org.apache.plc4x.java.api.exceptions.PlcConnectionException; |
| import org.apache.plc4x.java.api.exceptions.PlcRuntimeException; |
| |
| import java.util.*; |
| |
| public abstract class BasePlc4xProcessor extends AbstractProcessor { |
| |
| private static final PropertyDescriptor PLC_CONNECTION_STRING = new PropertyDescriptor |
| .Builder().name("PLC_CONNECTION_STRING") |
| .displayName("PLC connection String") |
| .description("PLC4X connection string used to connect to a given PLC device.") |
| .required(true) |
| .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) |
| .build(); |
| private static final PropertyDescriptor PLC_ADDRESS_STRING = new PropertyDescriptor |
| .Builder().name("PLC_ADDRESS_STRING") |
| .displayName("PLC resource address String") |
| .description("PLC4X address string used identify the resource to read/write on a given PLC device " + |
| "(Multiple values supported). The expected format is: {name}={address}(;{name}={address})*") |
| .required(true) |
| .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) |
| .build(); |
| |
| static final Relationship SUCCESS = new Relationship.Builder() |
| .name("SUCCESS") |
| .description("Successfully converted incoming json file to EntitymakerJSON") |
| .build(); |
| static final Relationship FAILURE = new Relationship.Builder() |
| .name("FAILURE") |
| .description("Successfully converted incoming json file to EntitymakerJSON") |
| .build(); |
| |
| private List<PropertyDescriptor> descriptors; |
| |
| Set<Relationship> relationships; |
| |
| private PlcConnection connection; |
| |
| private Map<String, String> addressMap; |
| |
| @Override |
| protected void init(final ProcessorInitializationContext context) { |
| this.descriptors = Arrays.asList(PLC_CONNECTION_STRING, PLC_ADDRESS_STRING); |
| this.relationships = new HashSet<>(Arrays.asList(SUCCESS, FAILURE)); |
| } |
| |
| PlcConnection getConnection() { |
| return connection; |
| } |
| |
| Collection<String> getFields() { |
| return addressMap.keySet(); |
| } |
| String getAddress(String field) { |
| return addressMap.get(field); |
| } |
| |
| @Override |
| public Set<Relationship> getRelationships() { |
| return this.relationships; |
| } |
| |
| @Override |
| public final List<PropertyDescriptor> getSupportedPropertyDescriptors() { |
| return descriptors; |
| } |
| |
| @OnScheduled |
| public void onScheduled(final ProcessContext context) { |
| PropertyValue property = context.getProperty(PLC_CONNECTION_STRING.getName()); |
| if ((connection == null) || !connection.isConnected()) { |
| try { |
| connection = new PlcDriverManager().getConnection(property.getValue()); |
| } catch (PlcConnectionException e) { |
| getLogger().error("Error connecting to " + property.getValue(), e); |
| } |
| } |
| |
| addressMap = new HashMap<>(); |
| PropertyValue addresses = context.getProperty(PLC_ADDRESS_STRING.getName()); |
| for (String segment : addresses.getValue().split(";")) { |
| String[] parts = segment.split("="); |
| if(parts.length != 2) { |
| throw new PlcRuntimeException("Invalid address format"); |
| } |
| addressMap.put(parts[0], parts[1]); |
| } |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (!(o instanceof BasePlc4xProcessor)) { |
| return false; |
| } |
| if (!super.equals(o)) { |
| return false; |
| } |
| BasePlc4xProcessor that = (BasePlc4xProcessor) o; |
| return Objects.equals(descriptors, that.descriptors) && |
| Objects.equals(getRelationships(), that.getRelationships()) && |
| Objects.equals(getConnection(), that.getConnection()) && |
| Objects.equals(addressMap, that.addressMap); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(super.hashCode(), descriptors, getRelationships(), getConnection(), addressMap); |
| } |
| |
| } |