Github user JPercivall commented on a diff in the pull request:
https://github.com/apache/nifi/pull/392#discussion_r63539712
--- Diff:
nifi-nar-bundles/nifi-mqtt-bundle/nifi-mqtt-processors/src/main/java/org/apache/nifi/processors/mqtt/common/AbstractMQTTProcessor.java
---
@@ -0,0 +1,342 @@
+/*
+ * 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.nifi.processors.mqtt.common;
+
+import org.apache.nifi.components.PropertyDescriptor;
+import org.apache.nifi.components.PropertyValue;
+import org.apache.nifi.components.ValidationContext;
+import org.apache.nifi.components.ValidationResult;
+import org.apache.nifi.components.Validator;
+import org.apache.nifi.expression.AttributeExpression;
+import org.apache.nifi.logging.ProcessorLog;
+import org.apache.nifi.processor.AbstractSessionFactoryProcessor;
+import org.apache.nifi.processor.ProcessContext;
+import org.apache.nifi.processor.ProcessSession;
+import org.apache.nifi.processor.ProcessSessionFactory;
+import org.apache.nifi.processor.exception.ProcessException;
+import org.apache.nifi.processor.util.StandardValidators;
+import org.apache.nifi.ssl.SSLContextService;
+import org.eclipse.paho.client.mqttv3.IMqttClient;
+import org.eclipse.paho.client.mqttv3.MqttClient;
+import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
+import org.eclipse.paho.client.mqttv3.MqttException;
+import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;
+
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.util.Properties;
+
+import static
org.apache.nifi.processors.mqtt.common.MqttConstants.ALLOWABLE_VALUE_CLEAN_SESSION_FALSE;
+import static
org.apache.nifi.processors.mqtt.common.MqttConstants.ALLOWABLE_VALUE_CLEAN_SESSION_TRUE;
+import static
org.apache.nifi.processors.mqtt.common.MqttConstants.ALLOWABLE_VALUE_MQTT_VERSION_310;
+import static
org.apache.nifi.processors.mqtt.common.MqttConstants.ALLOWABLE_VALUE_MQTT_VERSION_311;
+import static
org.apache.nifi.processors.mqtt.common.MqttConstants.ALLOWABLE_VALUE_MQTT_VERSION_AUTO;
+import static
org.apache.nifi.processors.mqtt.common.MqttConstants.ALLOWABLE_VALUE_QOS_0;
+import static
org.apache.nifi.processors.mqtt.common.MqttConstants.ALLOWABLE_VALUE_QOS_1;
+import static
org.apache.nifi.processors.mqtt.common.MqttConstants.ALLOWABLE_VALUE_QOS_2;
+
+public abstract class AbstractMQTTProcessor extends
AbstractSessionFactoryProcessor {
+
+ protected ProcessorLog logger;
+ protected IMqttClient mqttClient;
+ protected final Object mqttClientConnectLock = new Object();
+ protected volatile String broker;
+ protected volatile String clientID;
+ protected MqttConnectOptions connOpts;
+ protected MemoryPersistence persistence = new MemoryPersistence();
+ protected long maxTimeout;
+
+ public ProcessSessionFactory processSessionFactory;
+
+ public static final Validator QoSValidator = new Validator() {
+
+ @Override
+ public ValidationResult validate(String subject, String input,
ValidationContext context) {
+ Integer inputInt = Integer.parseInt(input);
+ if (inputInt < 0 || inputInt > 2) {
+ return new
ValidationResult.Builder().subject(subject).valid(false).explanation("QoS must
be an integer between 0 and 2").build();
+ }
+ return new
ValidationResult.Builder().subject(subject).valid(true).build();
+ }
+ };
+
+ public static final Validator BrokerValidator = new Validator() {
+
+ @Override
+ public ValidationResult validate(String subject, String input,
ValidationContext context) {
+ try{
+ URI brokerURI = new URI(input);
+ if (!"".equals(brokerURI.getPath())) {
+ return new
ValidationResult.Builder().subject(subject).valid(false).explanation("the
broker URI cannot have a path. It currently is:" + brokerURI.getPath()).build();
+ }
+ if (!("tcp".equals(brokerURI.getScheme()) ||
"ssl".equals(brokerURI.getScheme()))) {
+ return new
ValidationResult.Builder().subject(subject).valid(false).explanation("only the
'tcp' and 'ssl' schemes are supported.").build();
+ }
+ } catch (URISyntaxException e) {
+ return new
ValidationResult.Builder().subject(subject).valid(false).explanation("it is not
valid URI syntax.").build();
+ }
+ return new
ValidationResult.Builder().subject(subject).valid(true).build();
+ }
+ };
+
+ public static final Validator RetainValidator = new Validator() {
+
+ @Override
+ public ValidationResult validate(String subject, String input,
ValidationContext context) {
+ if("true".equalsIgnoreCase(input) ||
"false".equalsIgnoreCase(input)){
+ return new
ValidationResult.Builder().subject(subject).valid(true).build();
+ } else{
+ return
StandardValidators.createAttributeExpressionLanguageValidator(AttributeExpression.ResultType.BOOLEAN,
false)
+ .validate(subject, input, context);
+ }
+
+ }
+ };
+
+ public static final PropertyDescriptor PROP_BROKER_URI = new
PropertyDescriptor.Builder()
+ .name("Broker URI")
+ .description("The URI to use to connect to the MQTT broker
(e.g. tcp://localhost:1883)")
+ .required(true)
+ .addValidator(BrokerValidator)
+ .build();
+
+
+ public static final PropertyDescriptor PROP_CLIENTID = new
PropertyDescriptor.Builder()
+ .name("Client ID")
+ .description("MQTT client ID to use")
+ .required(true)
+ .addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
+ .build();
+
+ public static final PropertyDescriptor PROP_USERNAME = new
PropertyDescriptor.Builder()
+ .name("Username")
+ .description("Username to use when connecting to the broker")
+ .required(false)
+ .addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
+ .build();
+
+ public static final PropertyDescriptor PROP_PASSWORD = new
PropertyDescriptor.Builder()
+ .name("Password")
+ .description("Password to use when connecting to the broker")
+ .required(false)
+ .addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
+ .build();
+
+ public static final PropertyDescriptor PROP_SSL_CONTEXT_SERVICE = new
PropertyDescriptor.Builder().name("SSL Context Service")
+ .description("The SSL Context Service used to provide client
certificate information for TLS/SSL connections.")
+ .required(false)
+ .identifiesControllerService(SSLContextService.class)
+ .build();
+
+
+ public static final PropertyDescriptor PROP_LAST_WILL_TOPIC = new
PropertyDescriptor.Builder()
+ .name("Last Will Topic")
+ .description("The topic to send the client's Last Will to. If
the Last Will topic and message are not set then a Last Will will not be sent.")
+ .required(false)
+ .addValidator(StandardValidators.NON_BLANK_VALIDATOR)
+ .build();
+
+ public static final PropertyDescriptor PROP_LAST_WILL_MESSAGE = new
PropertyDescriptor.Builder()
+ .name("Last Will Message")
+ .description("The message to send as the client's Last Will.
If the Last Will topic and message are not set then a Last Will will not be
sent.")
+ .required(false)
+ .addValidator(StandardValidators.NON_BLANK_VALIDATOR)
+ .build();
+
+ public static final PropertyDescriptor PROP_LAST_WILL_RETAIN = new
PropertyDescriptor.Builder()
+ .name("Last Will Retain")
+ .description("Whether to retain the client's Last Will. If the
Last Will topic and message are not set then a Last Will will not be sent.")
+ .required(false)
+ .allowableValues("true","false")
+ .build();
+
+ public static final PropertyDescriptor PROP_LAST_WILL_QOS = new
PropertyDescriptor.Builder()
+ .name("'Last Will' QoS Level")
+ .description("QoS level to be used when publishing the Will
Message")
+ .required(false)
+ .allowableValues(
+ ALLOWABLE_VALUE_QOS_0,
+ ALLOWABLE_VALUE_QOS_1,
+ ALLOWABLE_VALUE_QOS_2
+ )
--- End diff --
This was intentional, because some applications may not have a Last Will
and there is no point forcing a use to have it set when it wouldn't be used.
That said I should have better validation to make sure it is set if the
other Last Will properties are.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
