org.apache.druid.query.movingaverage.DefaultMovingAverageQueryMetricsFactory Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.druid.query.movingaverage;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.annotations.VisibleForTesting;
import com.google.inject.Inject;
import org.apache.druid.guice.LazySingleton;
import org.apache.druid.guice.annotations.Json;
import org.apache.druid.jackson.DefaultObjectMapper;
@LazySingleton
public class DefaultMovingAverageQueryMetricsFactory implements MovingAverageQueryMetricsFactory
{
private static final MovingAverageQueryMetricsFactory INSTANCE =
new DefaultMovingAverageQueryMetricsFactory(new DefaultObjectMapper());
/**
* Should be used only in tests, directly or indirectly (via {@link
* MovingAverageQueryToolChest#MovingAverageQueryToolChest}).
*/
@VisibleForTesting
public static MovingAverageQueryMetricsFactory instance()
{
return INSTANCE;
}
private final ObjectMapper jsonMapper;
@Inject
public DefaultMovingAverageQueryMetricsFactory(@Json ObjectMapper jsonMapper)
{
this.jsonMapper = jsonMapper;
}
@Override
public MovingAverageQueryMetrics makeMetrics()
{
return new DefaultMovingAverageQueryMetrics(jsonMapper);
}
}