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From KayLerch <...@git.apache.org>
Subject [GitHub] nifi pull request #349: NIFI-1767 AWS IoT processors
Date Wed, 01 Jun 2016 19:07:39 GMT
Github user KayLerch commented on a diff in the pull request:

    https://github.com/apache/nifi/pull/349#discussion_r65423267
  
    --- Diff: nifi-nar-bundles/nifi-aws-bundle/nifi-aws-processors/src/main/java/org/apache/nifi/processors/aws/iot/util/MqttWebSocketAsyncClient.java
---
    @@ -0,0 +1,113 @@
    +/*
    + * 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.util;
    +
    +import java.net.URI;
    +import java.util.concurrent.LinkedBlockingQueue;
    +
    +import org.apache.nifi.logging.ProcessorLog;
    +import org.eclipse.paho.client.mqttv3.MqttAsyncClient;
    +import org.eclipse.paho.client.mqttv3.MqttCallback;
    +import org.eclipse.paho.client.mqttv3.MqttException;
    +import org.eclipse.paho.client.mqttv3.TimerPingSender;
    +import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
    +import org.eclipse.paho.client.mqttv3.MqttSecurityException;
    +import org.eclipse.paho.client.mqttv3.IMqttDeliveryToken;
    +import org.eclipse.paho.client.mqttv3.MqttMessage;
    +import org.eclipse.paho.client.mqttv3.internal.NetworkModule;
    +import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;
    +
    +public class MqttWebSocketAsyncClient extends MqttAsyncClient implements MqttCallback
{
    +
    +    protected volatile LinkedBlockingQueue<IoTMessage> awsQueuedMqttMessages =
new LinkedBlockingQueue<IoTMessage>();
    +    protected final ProcessorLog logger;
    +    protected final String serverURI;
    +
    +    protected static String createDummyURI(String original) {
    +        if (!original.startsWith("ws:") && !original.startsWith("wss:")) {
    +            return original;
    +        }
    +        final URI uri = URI.create(original);
    +        return "tcp://DUMMY-" + uri.getHost() + ":"
    +                + (uri.getPort() > 0 ? uri.getPort() : 80);
    +    }
    +
    +    protected static boolean isDummyURI(String uri) {
    +        return uri.startsWith("tcp://DUMMY-");
    +    }
    +
    +    public MqttWebSocketAsyncClient(String serverURI, String clientId,
    +                                    ProcessorLog logger) throws MqttException {
    +        super(createDummyURI(serverURI), clientId, new MemoryPersistence(), new TimerPingSender());
    +        this.serverURI = serverURI;
    +        this.logger = logger;
    +        this.setCallback(this);
    +    }
    +
    +    @Override
    +    protected NetworkModule[] createNetworkModules(String address,
    +                                                   MqttConnectOptions options) throws
MqttException{
    +        String[] serverURIs = options.getServerURIs();
    +        String[] array = serverURIs == null ? new String[] { address } :
    +            serverURIs.length == 0 ? new String[] { address }: serverURIs;
    +
    +        NetworkModule[] networkModules = new NetworkModule[array.length];
    +        for (int i = 0; i < array.length; i++) {
    +            networkModules[i] = createNetworkModule(array[i], options);
    +        }
    +        return networkModules;
    +    }
    +
    +    protected NetworkModule createNetworkModule(String input,
    +                                                MqttConnectOptions options) throws MqttException,
    +            MqttSecurityException {
    +        final String address = isDummyURI(input) ? this.serverURI : input;
    +        if (!address.startsWith("ws:") && !address.startsWith("wss:")) {
    +            return super.createNetworkModules(address, options)[0];
    +        }
    +
    +        final String subProtocol = (options.getMqttVersion() == MqttConnectOptions.MQTT_VERSION_3_1)
? "mqttv3.1" : "mqtt";
    +        return newWebSocketNetworkModule(URI.create(address), subProtocol, options);
    +    }
    +
    +    protected NetworkModule newWebSocketNetworkModule(URI uri,
    +                                                      String subProtocol, MqttConnectOptions
options) {
    +        final WebSocketNetworkModule netModule = new WebSocketNetworkModule(
    +                uri, subProtocol, getClientId());
    +        netModule.setConnectTimeout(options.getConnectionTimeout());
    +        return netModule;
    +    }
    +
    +    public LinkedBlockingQueue<IoTMessage> getAwsQueuedMqttMessages() {
    +        return awsQueuedMqttMessages;
    +    }
    +
    +    @Override
    +    public void connectionLost(Throwable t) {
    +        logger.error("Connection to " + this.getServerURI() + " lost with cause: " +
t.getMessage());
    +    }
    +
    +    @Override
    +    public void deliveryComplete(IMqttDeliveryToken token) {
    +    }
    +
    +    @Override
    +    public void messageArrived(String topic, MqttMessage message) throws Exception {
    +        logger.info("Message arrived from topic: " + topic);
    --- End diff --
    
    Changed it to debug.


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