ws.argo.transport.probe.standard.AmazonSNSTransport.java Source code

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Here is the source code for ws.argo.transport.probe.standard.AmazonSNSTransport.java

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/*
 * Copyright 2015 Jeff Simpson.
 *
 * Licensed under the MIT License, (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://opensource.org/licenses/MIT
 *
 * 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 ws.argo.transport.probe.standard;

import java.util.Properties;

import javax.xml.bind.JAXBException;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import ws.argo.plugin.transport.exception.TransportConfigException;
import ws.argo.plugin.transport.exception.TransportException;
import ws.argo.plugin.transport.sender.Transport;
import ws.argo.probe.Probe;

import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.services.sns.AmazonSNSClient;
import com.amazonaws.services.sns.model.PublishRequest;
import com.amazonaws.services.sns.model.PublishResult;

/**
 * The AmazonSNSTransport class encapsulates the mechanics of sending the probe
 * via SNS.
 * 
 * @author jmsimpson
 *
 */
public class AmazonSNSTransport implements Transport {

    // static final String DEFAULT_TOPIC_NAME =
    // "arn:aws:sns:us-east-1:627164602268:argoDiscoveryProtocol";

    private static final Logger LOGGER = LogManager.getLogger(AmazonSNSTransport.class.getName());

    private AmazonSNSClient snsClient;
    private String argoTopicName;
    private String ak;
    private String sk;

    /**
     * Default constructor. Usually followed by the
     * {@linkplain #initialize(Properties, String)} call.
     * 
     */
    public AmazonSNSTransport() {
    }

    public AmazonSNSTransport(String ak, String sk) {
        AWSCredentials creds = new BasicAWSCredentials(ak, sk);
        snsClient = new AmazonSNSClient(creds);
    }

    public AmazonSNSTransport(String ak, String sk, String argoTopicName) {
        this(ak, sk);
        this.argoTopicName = argoTopicName;
    }

    @Override
    public void initialize(Properties p, String networkInterface) throws TransportConfigException {
        this.argoTopicName = p.getProperty("argoTopicName");
        this.ak = p.getProperty("amazonAccessKey");
        this.sk = p.getProperty("amazonSecretKey");

        // Gotta have all three configuration items or KABOOM.
        // Can't really have a default for any of these.
        if (this.argoTopicName == null || this.ak == null || this.sk == null)
            throw new TransportConfigException("The Topic Name, AK and/or the SK was not specified.");

        AWSCredentials creds = new BasicAWSCredentials(ak, sk);
        snsClient = new AmazonSNSClient(creds);
    }

    @Override
    public void sendProbe(Probe probe) throws TransportException {
        String msg;
        try {
            msg = probe.asXML();
        } catch (JAXBException e) {
            throw new TransportException("Error trying to send probe payload", e);
        }
        PublishRequest publishRequest = new PublishRequest(argoTopicName, msg);
        PublishResult publishResult = snsClient.publish(publishRequest);
        // print MessageId of message published to SNS topic
        LOGGER.debug("Send probe payload as message id [" + publishResult.getMessageId() + "]: " + msg);

    }

    @Override
    public int maxPayloadSize() {
        return Integer.MAX_VALUE;
    }

    @Override
    public void close() throws TransportException {
        // Nothing to do
    }

    /**
     * Return the description of this Transport.
     */
    public String toString() {
        StringBuffer buf = new StringBuffer();
        buf.append("AmazonSNS Transport - ");
        buf.append(" arn [").append(argoTopicName).append("] - client [").append(snsClient.toString()).append("]");

        return buf.toString();
    }

    @Override
    public String getNetworkInterfaceName() {
        return "UNASSIGNED";
    }

}