/**
* Constructs an instance of the sample client wrapper
*
* @param brokerUrl the url to connect to
* @param clientId the client id to connect with
* @param cleanSession clear state at end of connection or not (durable or non-durable
* subscriptions)
* @param quietMode whether debug should be printed to standard out
* @param userName the username to connect with
* @param password the password for the user
* @throws MqttException
*/
public SampleAsyncWait(
String brokerUrl,
String clientId,
boolean cleanSession,
boolean quietMode,
String userName,
String password)
throws MqttException {
this.brokerUrl = brokerUrl;
this.quietMode = quietMode;
this.clean = cleanSession;
this.userName = userName;
this.password = password;
// This sample stores in a temporary directory... where messages temporarily
// stored until the message has been delivered to the server.
// ..a real application ought to store them somewhere
// where they are not likely to get deleted or tampered with
String tmpDir = System.getProperty("java.io.tmpdir");
MqttDefaultFilePersistence dataStore = new MqttDefaultFilePersistence(tmpDir);
try {
// Construct the connection options object that contains connection parameters
// such as cleanSession and LWT
conOpt = new MqttConnectOptions();
conOpt.setCleanSession(clean);
if (password != null) {
conOpt.setPassword(this.password.toCharArray());
}
if (userName != null) {
conOpt.setUserName(this.userName);
}
// Construct a non-blocking MQTT client instance
client = new MqttAsyncClient(this.brokerUrl, clientId, dataStore);
// Set this wrapper as the callback handler
client.setCallback(this);
} catch (MqttException e) {
e.printStackTrace();
log("Unable to set up client: " + e.toString());
System.exit(1);
}
}
public boolean connect(Properties props) {
brokerUrl = props.getProperty("brokerurl", null);
if (brokerUrl == null) {
throw new RuntimeException("Could not find parameter brokerur");
}
Random rnd = new Random();
clientId =
props.getProperty(
"clientid",
System.getenv("mqtt.clientid") != null
? System.getenv("mqtt.clientid")
: "mqtt.loadgen." + rnd.nextInt(100000));
if (clientId == null || clientId.length() == 0) {
try {
clientId =
NetworkInterface.getNetworkInterfaces().hasMoreElements()
? NetworkInterface.getNetworkInterfaces()
.nextElement()
.getInetAddresses()
.nextElement()
.getHostName()
: "noop";
} catch (Exception ex) {
LOG.log(Level.SEVERE, "Could not retrieve hostname", ex);
}
}
// This sample stores in a temporary directory... where messages temporarily
// stored until the message has been delivered to the server.
// ..a real application ought to store them somewhere
// where they are not likely to get deleted or tampered with
File tmpDir = createTempDir();
MqttDefaultFilePersistence dataStore = new MqttDefaultFilePersistence(tmpDir.getAbsolutePath());
LOG.log(
Level.INFO, "Using directory {0} for temporary message storage", tmpDir.getAbsolutePath());
try {
// Construct the connection options object that contains connection parameters
// such as cleanSession and LWT
conOpt = new MqttConnectOptions();
conOpt.setCleanSession(Boolean.parseBoolean(props.getProperty("cleansession", "true")));
conOpt.setConnectionTimeout(Integer.parseInt(props.getProperty("connectiontimeout", "100")));
conOpt.setKeepAliveInterval(Integer.parseInt(props.getProperty("keepaliveinterval", "100")));
conOpt.setSocketFactory(
SslUtil.getSocketFactory(
props.getProperty("cafile"),
props.getProperty("cert"),
props.getProperty("privkey"),
props.getProperty("password", "dummy")));
// Construct an MQTT blocking mode client
client = new MqttClient(this.brokerUrl, clientId, dataStore);
// Wait max 10sec for a blocking call
client.setTimeToWait(10000);
// Set this wrapper as the callback handler
client.setCallback(this);
// Connect to the MQTT server
LOG.log(
Level.INFO,
"Connecting to {0} with client ID {1}",
new Object[] {brokerUrl, client.getClientId()});
client.connect(conOpt);
LOG.info("Connected");
connected = true;
return connected;
} catch (MqttException e) {
LOG.log(Level.WARNING, "Unable to set up client: " + e.toString(), e);
} catch (Exception ex) {
LOG.log(Level.SEVERE, "Could not create connection: " + ex.getLocalizedMessage(), ex);
}
return false;
}
