| /* |
| * 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.apache.zest.spi.metrics; |
| |
| import org.apache.zest.api.metrics.MetricsCounterFactory; |
| import org.apache.zest.api.metrics.MetricsFactory; |
| import org.apache.zest.api.metrics.MetricsGaugeFactory; |
| import org.apache.zest.api.metrics.MetricsHealthCheckFactory; |
| import org.apache.zest.api.metrics.MetricsHistogramFactory; |
| import org.apache.zest.api.metrics.MetricsMeterFactory; |
| import org.apache.zest.api.metrics.MetricsNotSupportedException; |
| import org.apache.zest.api.metrics.MetricsProvider; |
| import org.apache.zest.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; |
| } |
| } |