org.graylog2.dashboards.widgets.strategies.FieldChartWidgetStrategy 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.dashboards.widgets.strategies;
import com.google.inject.assistedinject.Assisted;
import com.google.inject.assistedinject.AssistedInject;
import org.graylog2.dashboards.widgets.InvalidWidgetConfigurationException;
import org.graylog2.indexer.results.HistogramResult;
import org.graylog2.indexer.searches.Searches;
import org.graylog2.plugin.dashboards.widgets.ComputationResult;
import org.graylog2.plugin.dashboards.widgets.WidgetStrategy;
import org.graylog2.plugin.indexer.searches.timeranges.TimeRange;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Locale;
import java.util.Map;
import static com.google.common.base.Strings.isNullOrEmpty;
public class FieldChartWidgetStrategy extends ChartWidgetStrategy {
public interface Factory extends WidgetStrategy.Factory {
@Override
FieldChartWidgetStrategy create(Map config, TimeRange timeRange, String widgetId);
}
private static final Logger LOG = LoggerFactory.getLogger(FieldChartWidgetStrategy.class);
private final String query;
private final String field;
private final String statisticalFunction;
private final Searches searches;
private final TimeRange timeRange;
private final String widgetId;
@AssistedInject
public FieldChartWidgetStrategy(Searches searches, @Assisted Map config, @Assisted TimeRange timeRange, @Assisted String widgetId) throws InvalidWidgetConfigurationException {
super(config);
this.searches = searches;
this.timeRange = timeRange;
this.widgetId = widgetId;
if (!checkConfig(config)) {
throw new InvalidWidgetConfigurationException("Missing or invalid widget configuration. Provided config was: " + config.toString());
}
final String query = (String)config.get("query");
if (query == null || query.trim().isEmpty()) {
this.query = "*";
} else {
this.query = query;
}
this.field = (String) config.get("field");
this.statisticalFunction = (String) config.get("valuetype");
}
@Override
public ComputationResult compute() {
String filter = null;
if (!isNullOrEmpty(streamId)) {
filter = "streams:" + streamId;
}
try {
final HistogramResult histogramResult = searches.fieldHistogram(
query,
field,
Searches.DateHistogramInterval.valueOf(interval.toString().toUpperCase(Locale.ENGLISH)),
filter,
this.timeRange,
"cardinality".equalsIgnoreCase(statisticalFunction));
return new ComputationResult(histogramResult.getResults(), histogramResult.took().millis(), histogramResult.getHistogramBoundaries());
} catch (Searches.FieldTypeException e) {
String msg = "Could not calculate [" + this.getClass().getCanonicalName() + "] widget <" + this.widgetId + ">. Not a numeric field? The field was [" + field + "]";
LOG.error(msg, e);
throw new RuntimeException(msg, e);
}
}
private boolean checkConfig(Map config) {
return config.containsKey("field") && config.containsKey("valuetype")
&& config.containsKey("renderer")
&& config.containsKey("interpolation")
&& config.containsKey("interval");
}
}