/*
* Copyright 2013 the original author or authors.
*
* Licensed 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.springframework.xd.analytics.metrics.memory;
import static org.springframework.xd.analytics.metrics.core.MetricUtils.setGaugeValue;
import org.springframework.util.Assert;
import org.springframework.xd.analytics.metrics.core.Gauge;
import org.springframework.xd.analytics.metrics.core.GaugeRepository;
/**
* Memory backed Gauge repository that uses a ConcurrentMap
*
* @author Mark Pollack
*
*/
public final class InMemoryGaugeRepository extends InMemoryMetricRepository<Gauge> implements
GaugeRepository {
@Override
protected Gauge create(String name) {
return new Gauge(name);
}
@Override
protected Gauge getOrCreate(String name) {
Assert.notNull(name, "Gauge name can not be null");
Gauge gauge = findOne(name);
if (gauge == null) {
gauge = new Gauge(name);
save(gauge);
}
return gauge;
}
@Override
public void setValue(String name, long value) {
Gauge gauge = getOrCreate(name);
setGaugeValue(gauge, value);
}
@Override
public void reset(String name) {
Gauge gauge = getOrCreate(name);
setGaugeValue(gauge, 0);
}
}