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Use thread-local map instead of ConcurrentHashMap for faster instantiation of handler adapters

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Trustin Lee 2013-02-08 17:24:29 +09:00
parent b4eaedf712
commit 1eafffbec5
1 changed files with 9 additions and 4 deletions
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13
common/src/main/java/io/netty/util/internal/TypeParameterFinder.java
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@ -18,16 +18,21 @@ package io.netty.util.internal;
import java.lang.reflect.ParameterizedType; import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type; import java.lang.reflect.Type;
import java.util.concurrent.ConcurrentHashMap; import java.util.IdentityHashMap;
import java.util.concurrent.ConcurrentMap; import java.util.Map;
public final class TypeParameterFinder { public final class TypeParameterFinder {
// TODO: Use a weak key map private static final ThreadLocal<Map<Class<?>, Class<?>>> typeMap = new ThreadLocal<Map<Class<?>, Class<?>>>() {
private static final ConcurrentMap<Class<?>, Class<?>> typeMap = new ConcurrentHashMap<Class<?>, Class<?>>(); @Override
protected Map<Class<?>, Class<?>> initialValue() {
return new IdentityHashMap<Class<?>, Class<?>>();
}
};
public static Class<?> findActualTypeParameter( public static Class<?> findActualTypeParameter(
final Object object, final Class<?> parameterizedSuperClass, final int typeParamIndex) { final Object object, final Class<?> parameterizedSuperClass, final int typeParamIndex) {
final Map<Class<?>, Class<?>> typeMap = TypeParameterFinder.typeMap.get();
final Class<?> thisClass = object.getClass(); final Class<?> thisClass = object.getClass();
Class<?> messageType = typeMap.get(thisClass); Class<?> messageType = typeMap.get(thisClass);
if (messageType == null) { if (messageType == null) {