/*
* Copyright (c) 2012, Niclas Hedhman. All Rights Reserved.
*
* 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.qi4j.spi.metrics;
import org.qi4j.api.metrics.MetricsCounterFactory;
import org.qi4j.api.metrics.MetricsFactory;
import org.qi4j.api.metrics.MetricsGaugeFactory;
import org.qi4j.api.metrics.MetricsHealthCheckFactory;
import org.qi4j.api.metrics.MetricsHistogramFactory;
import org.qi4j.api.metrics.MetricsMeterFactory;
import org.qi4j.api.metrics.MetricsNotSupportedException;
import org.qi4j.api.metrics.MetricsProvider;
import org.qi4j.api.metrics.MetricsTimerFactory;
/**
* Adapter to ease MetricsProvider implementation.
*/
public class MetricsProviderAdapter
implements MetricsProvider
{
private static final MetricsCounterFactory NULL_COUNTER_FACTORY = new NullMetricsFactory.NullCounterFactory();
private static final MetricsGaugeFactory NULL_GAUGE_FACTORY = new NullMetricsFactory.NullGaugeFactory();
private static final MetricsMeterFactory NULL_METER_FACTORY = new NullMetricsFactory.NullMeterFactory();
private static final MetricsHistogramFactory NULL_HISTOGRAM_FACTORY = new NullMetricsFactory.NullHistogramFactory();
private static final MetricsTimerFactory NULL_TIMER_FACTORY = new NullMetricsFactory.NullTimerFactory();
private static final MetricsHealthCheckFactory NULL_HEALTHCHECK_FACTORY = new NullMetricsFactory.NullHealthCheckFactory();
@SuppressWarnings( "unchecked" )
@Override
public <T extends MetricsFactory> T createFactory( Class<T> factoryType )
{
if( factoryType.equals( MetricsCounterFactory.class ) )
{
return (T) createMetricsCounterFactory();
}
else if( factoryType.equals( MetricsGaugeFactory.class ) )
{
return (T) createMetricsGaugeFactory();
}
else if( factoryType.equals( MetricsHealthCheckFactory.class ) )
{
return (T) createMetricsHealthCheckFactory();
}
else if( factoryType.equals( MetricsHistogramFactory.class ) )
{
return (T) createMetricsHistogramFactory();
}
else if( factoryType.equals( MetricsMeterFactory.class ) )
{
return (T) createMetricsMeterFactory();
}
else if( factoryType.equals( MetricsTimerFactory.class ) )
{
return (T) createMetricsTimerFactory();
}
throw new MetricsNotSupportedException( factoryType, getClass() );
}
protected MetricsTimerFactory createMetricsTimerFactory()
{
return NULL_TIMER_FACTORY;
}
protected MetricsMeterFactory createMetricsMeterFactory()
{
return NULL_METER_FACTORY;
}
protected MetricsHistogramFactory createMetricsHistogramFactory()
{
return NULL_HISTOGRAM_FACTORY;
}
protected MetricsHealthCheckFactory createMetricsHealthCheckFactory()
{
return NULL_HEALTHCHECK_FACTORY;
}
protected MetricsGaugeFactory createMetricsGaugeFactory()
{
return NULL_GAUGE_FACTORY;
}
protected MetricsCounterFactory createMetricsCounterFactory()
{
return NULL_COUNTER_FACTORY;
}
}