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@ -2,6 +2,7 @@ package org.libresonic.player.monitor; |
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import com.codahale.metrics.JmxReporter; |
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import com.codahale.metrics.MetricRegistry; |
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import org.libresonic.player.service.ApacheCommonsConfigurationService; |
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import java.util.concurrent.TimeUnit; |
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@ -10,18 +11,41 @@ import java.util.concurrent.TimeUnit; |
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*/ |
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public class MetricsManager { |
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private ApacheCommonsConfigurationService configurationService; |
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// Main metrics registry
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private static final MetricRegistry metrics = new MetricRegistry(); |
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private static Boolean metricsActivatedByConfiguration = null; |
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private static Object _lock = new Object(); |
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// Potential metrics reporters
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private static JmxReporter reporter; |
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static { |
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reporter = JmxReporter.forRegistry(metrics) |
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.convertRatesTo(TimeUnit.SECONDS.SECONDS) |
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.convertDurationsTo(TimeUnit.MILLISECONDS) |
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.build(); |
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reporter.start(); |
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private void configureMetricsActivation() { |
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if (configurationService.containsKey("Metrics")) { |
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metricsActivatedByConfiguration = Boolean.TRUE; |
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// Start a Metrics JMX reporter
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reporter = JmxReporter.forRegistry(metrics) |
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.convertRatesTo(TimeUnit.SECONDS.SECONDS) |
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.convertDurationsTo(TimeUnit.MILLISECONDS) |
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.build(); |
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reporter.start(); |
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} else { |
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metricsActivatedByConfiguration = Boolean.FALSE; |
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} |
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} |
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private boolean metricsActivatedByConfiguration() { |
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if (metricsActivatedByConfiguration == null) { |
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synchronized (_lock) { |
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if (metricsActivatedByConfiguration == null) { |
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configureMetricsActivation(); |
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} |
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} |
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} |
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return metricsActivatedByConfiguration.booleanValue(); |
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} |
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/** |
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@ -31,8 +55,12 @@ public class MetricsManager { |
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* @param name |
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* @return |
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*/ |
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public static Timer timer(Class clazz, String name) { |
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return new TimerBuilder().timer(clazz,name); |
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public Timer timer(Class clazz, String name) { |
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if (metricsActivatedByConfiguration()) { |
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return new TimerBuilder().timer(clazz, name); |
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} else { |
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return nullTimerSingleton; |
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} |
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} |
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/** |
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@ -42,7 +70,7 @@ public class MetricsManager { |
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* @param name |
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* @return |
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*/ |
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public static Timer timer(Object ref, String name) { |
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public Timer timer(Object ref, String name) { |
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return timer(ref.getClass(),name); |
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} |
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@ -54,11 +82,19 @@ public class MetricsManager { |
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* @param ifTrue |
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* @return |
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*/ |
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public static TimerBuilder condition(boolean ifTrue) { |
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if (ifTrue == false) { |
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return conditionFalseTimerBuilderSingleton; |
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public TimerBuilder condition(boolean ifTrue) { |
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if (metricsActivatedByConfiguration()) { |
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if (ifTrue == false) { |
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return conditionFalseTimerBuilderSingleton; |
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} |
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return new TimerBuilder(); |
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} else { |
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return nullTimerBuilderSingleton; |
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} |
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return new TimerBuilder(); |
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} |
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public void setConfigurationService(ApacheCommonsConfigurationService configurationService) { |
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this.configurationService = configurationService; |
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} |
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/** |
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@ -102,7 +138,8 @@ public class MetricsManager { |
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// Convenient singletons to avoid creating useless objects instances
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// -----------------------------------------------------------------
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private static final NullTimer nullTimerSingleton = new NullTimer(null); |
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private static final ConditionFalseTimerBuilder conditionFalseTimerBuilderSingleton = new ConditionFalseTimerBuilder(); |
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private static final NullTimerBuilder conditionFalseTimerBuilderSingleton = new NullTimerBuilder(); |
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private static final NullTimerBuilder nullTimerBuilderSingleton = new NullTimerBuilder(); |
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private static class NullTimer extends Timer { |
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@ -116,7 +153,7 @@ public class MetricsManager { |
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} |
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} |
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private static class ConditionFalseTimerBuilder extends TimerBuilder { |
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private static class NullTimerBuilder extends TimerBuilder { |
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@Override |
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public Timer timer(Class clazz, String name) { |
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return nullTimerSingleton; |
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