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cache isElAvailable result value #12

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cache isElAvailable result value #12

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7 changes: 7 additions & 0 deletions impl/src/main/java/io/astefanutti/metrics/aspectj/MetricStrategyFactory.java
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,8 @@

/* package-private */ final class MetricStrategyFactory {

static Boolean isElAvailableCached;

static MetricStrategy newInstance(Object object) {
if (isElAvailable(object.getClass()))
return new JavaxElMetricStrategy(object);
Expand All @@ -41,10 +43,15 @@ private static ClassLoader getClassLoader(Class<?> clazz) {
}

private static boolean isElAvailable(Class<?> clazz) {
if (isElAvailableCached != null) {
return isElAvailableCached;
}
try {
getClassLoader(clazz).loadClass("javax.el.ELProcessor");
isElAvailableCached = true;
return true;
} catch (ClassNotFoundException cause) {
isElAvailableCached = false;
return false;
}
}
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