net.anotheria.extensions.php.connectors.impl.RabbitMQConnector Maven / Gradle / Ivy
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package net.anotheria.extensions.php.connectors.impl;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonSyntaxException;
import com.rabbitmq.client.*;
import net.anotheria.extensions.php.connectors.AbstractConnector;
import net.anotheria.extensions.php.dto.PHPProducerDTO;
import net.anotheria.extensions.php.exceptions.ConnectorInitException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.util.Properties;
import java.util.concurrent.TimeoutException;
/**
* Connector to retrieve data from RabbitMQ.
*
* Expects that data to this connector will be sent in json
* format with strict to {@link net.anotheria.extensions.php.dto.PHPProducerDTO}
* class structure
*
* Has default configuration for rabbitmq host, port, auth credentials
* and queue name assuming RabbitMQ instance is running on same host
* with out of box configuration and queue name in php agent is default.
*
* No additional configuration for this connector is needed if
* RabbitMQ and php agent instances satisfy requirement mentioned above.
*/
public class RabbitMQConnector extends AbstractConnector {
private final static Logger log = LoggerFactory.getLogger(RabbitMQConnector.class);
private static final Gson gson = new GsonBuilder().create();
/**
* RabbitMQ connection
*/
private Connection connection;
/**
* Channel used by connector to retrieve data
*/
private Channel channel;
private long enabledInTimestamp;
@Override
public Properties getDefaultProperties() {
Properties properties = new Properties();
properties.setProperty("connector.host", "localhost");
properties.setProperty("connector.port", "5672");
properties.setProperty("connector.username", "guest");
properties.setProperty("connector.password", "guest");
properties.setProperty("connector.queue-name", "moskito-php");
return properties;
}
/**
* Opens connection and channel to listen
* configured queue for incoming data
* @param properties configured connector properties
* @throws ConnectorInitException on connection to RabbitMQ fail
*/
@Override
public void initWithDefaultProperties(Properties properties) throws ConnectorInitException {
log.debug("Starting to initWithDefaultProperties RabbitMQ connector in php plugin...");
ConnectionFactory factory = new ConnectionFactory();
factory.setHost(properties.getProperty("connector.host"));
factory.setPort(
Integer.parseInt(properties.getProperty("connector.port"))
);
factory.setUsername(properties.getProperty("connector.username"));
factory.setPassword(properties.getProperty("connector.password"));
try {
connection = factory.newConnection();
channel = connection.createChannel();
channel.queueDeclare(properties.getProperty("connector.queue-name"),
false, false, false, null);
channel.basicConsume(
properties.getProperty("connector.queue-name"),
true, new MoskitoPHPConsumer(channel)
);
enabledInTimestamp = System.currentTimeMillis();
} catch (IOException | TimeoutException e) {
deinit();
throw new ConnectorInitException("Failed to open connection to RabbitMQ", e);
}
}
/**
* Closes RabbitMQ channel and connection
*/
public void deinit() {
if (channel != null) try {
channel.close();
} catch (IOException | TimeoutException e) {
log.warn("Failed to close channel in RabbitMQ connector");
}
if (connection != null) try {
connection.close();
} catch (IOException e) {
log.warn("Failed to close connection in RabbitMQ connector");
}
}
/**
* Consumer implementation for passing messages
* that parsing incoming json message and pass it
* to {@link AbstractConnector#updateProducer(PHPProducerDTO)}
*/
private class MoskitoPHPConsumer extends DefaultConsumer {
/**
* Constructs a new instance and records its association to the passed-in channel.
*
* @param channel the channel to which this consumer is attached
*/
private MoskitoPHPConsumer(Channel channel) {
super(channel);
}
@Override
public void handleDelivery(
String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body
) throws IOException {
PHPProducerDTO producerDTO;
try {
producerDTO = gson.fromJson(new String(body, "UTF-8"), PHPProducerDTO.class);
} catch (JsonSyntaxException e) {
log.error("Failed to parse incoming json data.", e);
return;
}
if((producerDTO.getTimestamp() * 1000) > enabledInTimestamp) {
updateProducer(producerDTO);
}
}
}
}