org.graylog2.bindings.providers.RulesEngineProvider 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.providers;
import org.graylog2.Configuration;
import org.graylog2.plugin.RulesEngine;
import org.graylog2.rules.DroolsEngine;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.annotation.Nullable;
import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Provider;
import javax.inject.Singleton;
import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Strings.isNullOrEmpty;
@Singleton
public class RulesEngineProvider implements Provider {
private static final Logger LOG = LoggerFactory.getLogger(RulesEngineProvider.class);
private final RulesEngine rulesEngine;
@Inject
public RulesEngineProvider(Configuration configuration, DroolsEngine droolsEngine,
@Named("rules_file") @Nullable String rulesFilePath) {
this.rulesEngine = checkNotNull(droolsEngine);
if (!isNullOrEmpty(rulesFilePath)) {
if (rulesEngine.addRulesFromFile(rulesFilePath)) {
LOG.info("Using rules: {}", rulesFilePath);
} else {
LOG.warn("Unable to load rules due to load error: {}", rulesFilePath);
}
} else {
LOG.info("No static rules file loaded.");
}
}
@Override
public RulesEngine get() {
return rulesEngine;
}
}