andreacavalli/netty5
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

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

Browse Source
This commit is contained in:
Trustin Lee 2013-02-08 17:24:29 +09:00
parent b4eaedf712
commit 1eafffbec5
1 changed files with 9 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
common/src/main/java/io/netty/util/internal/TypeParameterFinder.java
View File

@ -18,16 +18,21 @@ package io.netty.util.internal;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.IdentityHashMap;
import java.util.Map;
public final class TypeParameterFinder {
// TODO: Use a weak key map
private static final ConcurrentMap<Class<?>, Class<?>> typeMap = new ConcurrentHashMap<Class<?>, Class<?>>();
private static final ThreadLocal<Map<Class<?>, Class<?>>> typeMap = new ThreadLocal<Map<Class<?>, Class<?>>>() {
@Override
protected Map<Class<?>, Class<?>> initialValue() {
return new IdentityHashMap<Class<?>, Class<?>>();
}
};
public static Class<?> findActualTypeParameter(
final Object object, final Class<?> parameterizedSuperClass, final int typeParamIndex) {
final Map<Class<?>, Class<?>> typeMap = TypeParameterFinder.typeMap.get();
final Class<?> thisClass = object.getClass();
Class<?> messageType = typeMap.get(thisClass);
if (messageType == null) {