Github user trixpan commented on a diff in the pull request: https://github.com/apache/nifi/pull/1521#discussion_r101916052 --- Diff: nifi-nar-bundles/nifi-aws-bundle/nifi-aws-processors/src/main/java/org/apache/nifi/processors/aws/iot/AbstractAWSIoTProcessor.java --- @@ -0,0 +1,232 @@ +/* + * 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.aws.iot; + +import com.amazonaws.ClientConfiguration; +import com.amazonaws.auth.AWSCredentials; +import com.amazonaws.auth.AWSCredentialsProvider; +import com.amazonaws.services.iot.AWSIotClient; +import org.apache.commons.lang3.RandomStringUtils; +import org.apache.nifi.annotation.lifecycle.OnStopped; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.processor.ProcessContext; +import org.apache.nifi.processor.util.StandardValidators; +import org.apache.nifi.processors.aws.AbstractAWSCredentialsProviderProcessor; +import org.apache.nifi.processors.aws.iot.util.AWS4Signer; +import org.apache.nifi.processors.aws.iot.util.MqttWebSocketAsyncClient; +import org.eclipse.paho.client.mqttv3.MqttConnectOptions; +import org.eclipse.paho.client.mqttv3.MqttException; + +import java.util.Date; +import java.util.concurrent.TimeUnit; + +public abstract class AbstractAWSIoTProcessor extends AbstractAWSCredentialsProviderProcessor<AWSIotClient> { + static final String PROP_NAME_ENDPOINT = "aws.iot.endpoint"; + static final String PROP_NAME_CLIENT = "aws.iot.mqtt.client"; + static final String PROP_NAME_KEEPALIVE = "aws.iot.mqtt.keepalive"; + static final String PROP_NAME_TOPIC = "aws.iot.mqtt.topic"; + static final String PROP_NAME_QOS = "aws.iot.mqtt.qos"; + /** + * Amazon's current service limit on websocket connection duration + */ + static final Integer PROP_DEFAULT_KEEPALIVE = 60 * 60 * 24; + /** + * When to start indicating the need for connection renewal (in seconds before actual termination) + */ + static final Integer DEFAULT_CONNECTION_RENEWAL_BEFORE_KEEP_ALIVE_EXPIRATION = 20; + static final String PROP_DEFAULT_CLIENT = AbstractAWSIoTProcessor.class.getSimpleName(); + /** + * Default QoS level for message delivery + */ + static final Integer DEFAULT_QOS = 0; + String awsTopic; + int awsQos; + MqttWebSocketAsyncClient mqttClient; + String awsEndpoint; + String awsClientId; + + static final Integer mqttActionTimeout = -1; + + private String awsRegion; + private Integer awsKeepAliveSeconds; + private Date dtLastConnect; + + public static final PropertyDescriptor PROP_ENDPOINT = new PropertyDescriptor + .Builder().name(PROP_NAME_ENDPOINT) + .description("Your endpoint identifier in AWS IoT (e.g. A1B71MLXKNCXXX)") + .required(true) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .build(); + + public static final PropertyDescriptor PROP_CLIENT = new PropertyDescriptor + .Builder().name(PROP_NAME_CLIENT) + .description("MQTT client ID to use. Under the cover your input will be extended by a random " + + "string to ensure a unique id among all connected clients.") + .required(false) + .defaultValue(PROP_DEFAULT_CLIENT) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .build(); + + public static final PropertyDescriptor PROP_KEEPALIVE = new PropertyDescriptor + .Builder().name(PROP_NAME_KEEPALIVE) + .description("Seconds a WebSocket-connection remains open after automatically renewing it. " + --- End diff -- **JPercivall** Little confusing, maybe should read "The number of seconds a WebSocket-connection..."
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