org.graylog2.alerts.AlertConditionFactory 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.alerts;
import org.graylog2.plugin.alarms.AlertCondition;
import org.graylog2.plugin.configuration.Configuration;
import org.graylog2.plugin.configuration.ConfigurationException;
import org.graylog2.plugin.configuration.ConfigurationRequest;
import org.graylog2.plugin.streams.Stream;
import org.joda.time.DateTime;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.inject.Inject;
import java.util.Map;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Strings.isNullOrEmpty;
public class AlertConditionFactory {
private static final Logger LOG = LoggerFactory.getLogger(AlertConditionFactory.class);
private final Map alertConditionMap;
@Inject
public AlertConditionFactory(Map alertConditionMap) {
this.alertConditionMap = alertConditionMap;
}
public AlertCondition createAlertCondition(String type,
Stream stream,
String id,
DateTime createdAt,
String creatorId,
Map parameters,
String title) throws ConfigurationException {
final String conditionTitle = isNullOrEmpty(title) ? "" : "'" + title + "' ";
final AlertCondition.Factory factory = this.alertConditionMap.get(type);
checkArgument(factory != null, "Unknown alert condition type <%s> for alert condition %s<%s> on stream \"%s\" <%s>",
type, conditionTitle, id, stream.getTitle(), stream.getId());
/*
* Ensure the given parameters fulfill the requested configuration preconditions.
* Here we strictly use the Configuration object to verify the configuration and don't pass it down to
* the factory. The reason for this is that Configuration only support int values, but at least an
* alert condition expects a double.
*/
try {
final ConfigurationRequest requestedConfiguration = factory.config().getRequestedConfiguration();
final Configuration configuration = new Configuration(parameters);
requestedConfiguration.check(configuration);
} catch (ConfigurationException e) {
LOG.error("Could not load alert condition {}<{}> on stream \"{}\" <{}>, invalid configuration detected.", conditionTitle, id, stream.getTitle(), stream.getId());
throw e;
}
return factory.create(stream, id, createdAt, creatorId, parameters, title);
}
}