org.graylog2.bindings.MessageOutputBindings Maven / Gradle / Ivy
/**
* This file is part of Graylog.
*
* Graylog 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.
*
* Graylog 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 Graylog. If not, see .
*/
package org.graylog2.bindings;
import com.google.common.base.Strings;
import com.google.inject.Scopes;
import com.google.inject.multibindings.MapBinder;
import org.graylog2.Configuration;
import org.graylog2.outputs.BlockingBatchedESOutput;
import org.graylog2.outputs.DefaultMessageOutput;
import org.graylog2.outputs.GelfOutput;
import org.graylog2.outputs.LoggingOutput;
import org.graylog2.plugin.inject.Graylog2Module;
import org.graylog2.plugin.outputs.MessageOutput;
import org.graylog2.shared.plugins.ChainingClassLoader;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* @author Dennis Oelkers
*/
public class MessageOutputBindings extends Graylog2Module {
private static final Logger LOG = LoggerFactory.getLogger(MessageOutputBindings.class);
private final Configuration configuration;
private final ChainingClassLoader chainingClassLoader;
public MessageOutputBindings(final Configuration configuration, ChainingClassLoader chainingClassLoader) {
this.configuration = configuration;
this.chainingClassLoader = chainingClassLoader;
}
@Override
protected void configure() {
final Class defaultMessageOutputClass = getDefaultMessageOutputClass(BlockingBatchedESOutput.class);
LOG.debug("Using default message output class: {}", defaultMessageOutputClass.getCanonicalName());
bind(MessageOutput.class).annotatedWith(DefaultMessageOutput.class).to(defaultMessageOutputClass).in(Scopes.SINGLETON);
final MapBinder> outputMapBinder = outputsMapBinder();
installOutput(outputMapBinder, GelfOutput.class, GelfOutput.Factory.class);
installOutput(outputMapBinder, LoggingOutput.class, LoggingOutput.Factory.class);
}
private Class getDefaultMessageOutputClass(Class fallbackClass) {
// Just use the default fallback if nothing is configured. This is the default case.
if (Strings.isNullOrEmpty(configuration.getDefaultMessageOutputClass())) {
return fallbackClass;
}
try {
@SuppressWarnings("unchecked")
final Class defaultMessageOutputClass = (Class) chainingClassLoader.loadClass(configuration.getDefaultMessageOutputClass());
if (MessageOutput.class.isAssignableFrom(defaultMessageOutputClass)) {
LOG.info("Using {} as default message output", defaultMessageOutputClass.getCanonicalName());
return defaultMessageOutputClass;
} else {
LOG.warn("Class \"{}\" is not a subclass of \"{}\". Using \"{}\" as default message output",
configuration.getDefaultMessageOutputClass(),
MessageOutput.class.getCanonicalName(),
fallbackClass.getCanonicalName());
return fallbackClass;
}
} catch (ClassNotFoundException e) {
LOG.warn("Unable to find default message output class \"{}\", using \"{}\"",
configuration.getDefaultMessageOutputClass(),
fallbackClass.getCanonicalName());
return fallbackClass;
}
}
}