/**
* This file is part of Graylog2.
*
* Graylog2 is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Graylog2 is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Graylog2. If not, see <http://www.gnu.org/licenses/>.
*/
package org.graylog2.inputs.transports;
import com.codahale.metrics.Gauge;
import com.codahale.metrics.MetricRegistry;
import com.google.common.eventbus.EventBus;
import com.google.common.eventbus.Subscribe;
import com.google.inject.assistedinject.Assisted;
import com.google.inject.assistedinject.AssistedInject;
import org.graylog2.plugin.ConfigClass;
import org.graylog2.plugin.FactoryClass;
import org.graylog2.plugin.LocalMetricRegistry;
import org.graylog2.plugin.configuration.Configuration;
import org.graylog2.plugin.configuration.ConfigurationRequest;
import org.graylog2.plugin.configuration.fields.ConfigurationField;
import org.graylog2.plugin.configuration.fields.NumberField;
import org.graylog2.plugin.configuration.fields.TextField;
import org.graylog2.plugin.inputs.MessageInput;
import org.graylog2.plugin.inputs.MisfireException;
import org.graylog2.plugin.inputs.codecs.CodecAggregator;
import org.graylog2.plugin.inputs.transports.ThrottleableTransport;
import org.graylog2.plugin.inputs.transports.Transport;
import org.graylog2.plugin.lifecycles.Lifecycle;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.inject.Named;
import java.io.IOException;
import java.util.concurrent.ScheduledExecutorService;
public class AmqpTransport extends ThrottleableTransport {
public static final String CK_HOSTNAME = "broker_hostname";
public static final String CK_PORT = "broker_port";
public static final String CK_VHOST = "broker_vhost";
public static final String CK_USERNAME = "broker_username";
public static final String CK_PASSWORD = "broker_password";
public static final String CK_PREFETCH = "prefetch";
public static final String CK_EXCHANGE = "exchange";
public static final String CK_QUEUE = "queue";
public static final String CK_ROUTING_KEY = "routing_key";
public static final String CK_PARALLEL_QUEUES = "parallel_queues";
private static final Logger LOG = LoggerFactory.getLogger(AmqpTransport.class);
private final Configuration configuration;
private final EventBus eventBus;
private final MetricRegistry localRegistry;
private final ScheduledExecutorService scheduler;
private AmqpConsumer consumer;
@AssistedInject
public AmqpTransport(@Assisted Configuration configuration,
EventBus eventBus,
LocalMetricRegistry localRegistry,
@Named("daemonScheduler") ScheduledExecutorService scheduler) {
this.configuration = configuration;
this.eventBus = eventBus;
this.localRegistry = localRegistry;
this.scheduler = scheduler;
localRegistry.register("read_bytes_1sec", new Gauge<Long>() {
@Override
public Long getValue() { return consumer.getLastSecBytesRead().get();
}
});
localRegistry.register("written_bytes_1sec", new Gauge<Long>() {
@Override
public Long getValue() { return 0L;
}
});
localRegistry.register("read_bytes_total", new Gauge<Long>() {
@Override
public Long getValue() { return consumer.getTotalBytesRead().get();
}
});
localRegistry.register("written_bytes_total", new Gauge<Long>() {
@Override
public Long getValue() { return 0L;
}
});
}
@Subscribe
public void lifecycleChanged(Lifecycle lifecycle) {
try {
LOG.debug("Lifecycle changed to {}", lifecycle);
switch (lifecycle) {
case PAUSED:
case FAILED:
case HALTING:
try {
if (consumer != null) {
consumer.stop();
}
} catch (IOException e) {
LOG.warn("Unable to stop consumer", e);
}
break;
default:
if (consumer.isConnected()) {
LOG.debug("Consumer is already connected, not running it a second time.");
break;
}
try {
consumer.run();
} catch (IOException e) {
LOG.warn("Unable to resume consumer", e);
}
break;
}
} catch (Exception e) {
LOG.warn("This should not throw any exceptions", e);
}
}
@Override
public void setMessageAggregator(CodecAggregator aggregator) {
}
@Override
public void launch(MessageInput input) throws MisfireException {
consumer = new AmqpConsumer(
configuration.getString(CK_HOSTNAME),
configuration.getInt(CK_PORT),
configuration.getString(CK_VHOST),
configuration.getString(CK_USERNAME),
configuration.getString(CK_PASSWORD),
configuration.getInt(CK_PREFETCH),
configuration.getString(CK_QUEUE),
configuration.getString(CK_EXCHANGE),
configuration.getString(CK_ROUTING_KEY),
configuration.getInt(CK_PARALLEL_QUEUES),
input,
scheduler
);
eventBus.register(this);
try {
consumer.run();
} catch (IOException e) {
throw new MisfireException("Could not launch AMQP consumer.", e);
}
}
@Override
public void stop() {
if (consumer != null) {
try {
consumer.stop();
} catch (IOException e) {
LOG.error("Could not stop AMQP consumer.", e);
}
}
eventBus.unregister(this);
}
@Override
public com.codahale.metrics.MetricSet getMetricSet() {
return localRegistry;
}
@FactoryClass
public interface Factory extends Transport.Factory<AmqpTransport> {
@Override
AmqpTransport create(Configuration configuration);
@Override
Config getConfig();
}
@ConfigClass
public static class Config extends ThrottleableTransport.Config {
@Override
public ConfigurationRequest getRequestedConfiguration() {
final ConfigurationRequest cr = super.getRequestedConfiguration();
cr.addField(
new TextField(
CK_HOSTNAME,
"Broker hostname",
"",
"Hostname of the AMQP broker to use",
ConfigurationField.Optional.NOT_OPTIONAL
)
);
cr.addField(
new NumberField(
CK_PORT,
"Broker port",
5672,
"Port of the AMQP broker to use",
ConfigurationField.Optional.OPTIONAL,
NumberField.Attribute.IS_PORT_NUMBER
)
);
cr.addField(
new TextField(
CK_VHOST,
"Broker virtual host",
"/",
"Virtual host of the AMQP broker to use",
ConfigurationField.Optional.NOT_OPTIONAL
)
);
cr.addField(
new TextField(
CK_USERNAME,
"Username",
"",
"Username to connect to AMQP broker",
ConfigurationField.Optional.OPTIONAL
)
);
cr.addField(
new TextField(
CK_PASSWORD,
"Password",
"",
"Password to connect to AMQP broker",
ConfigurationField.Optional.OPTIONAL,
TextField.Attribute.IS_PASSWORD
)
);
cr.addField(
new NumberField(
CK_PREFETCH,
"Prefetch count",
100,
"For advanced usage: AMQP prefetch count. Default is 100.",
ConfigurationField.Optional.NOT_OPTIONAL
)
);
cr.addField(
new TextField(
CK_QUEUE,
"Queue",
defaultQueueName(),
"Name of queue that is created.",
ConfigurationField.Optional.NOT_OPTIONAL
)
);
cr.addField(
new TextField(
CK_EXCHANGE,
"Exchange",
defaultExchangeName(),
"Name of exchange to bind to.",
ConfigurationField.Optional.NOT_OPTIONAL
)
);
cr.addField(
new TextField(
CK_ROUTING_KEY,
"Routing key",
defaultRouttingKey(),
"Routing key to listen for.",
ConfigurationField.Optional.NOT_OPTIONAL
)
);
cr.addField(
new NumberField(
CK_PARALLEL_QUEUES,
"Number of Queues",
1,
"Number of parallel QUeues",
ConfigurationField.Optional.NOT_OPTIONAL
)
);
return cr;
}
protected String defaultRouttingKey() {
return "#";
}
protected String defaultExchangeName() {
return "log-messages";
}
protected String defaultQueueName() {
return "log-messages";
}
}
}