org.tio.utils.thoughtworksparanamer

类 CachingParanamer

java.lang.Object

org.tio.utils.thoughtworksparanamer.CachingParanamer

所有已实现的接口:

Paranamer

直接已知子类:

CachingParanamer.WithoutWeakReferences

public class CachingParanamer
extends Object
implements Paranamer

Implementation of Paranamer which delegate to another Paranamer implementation, adding caching functionality to speed up usage. It also uses a WeakHashmap as an implementation detail (wrapped in Collections.synchronizedMap(..)), to allow large usages to garbage collect things as big as whole classloaders (after working through all the refs that originated from that classloader). Tomcat and other 'containers' do this during hot application deployment, undeployment and most importantly for Paranamer redeployment. Basically, this will allow a perm-gen usage keeps growing scenario.

作者:

Paul Hammant, Mauro Talevi

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	CachingParanamer.WithoutWeakReferences This implementation has a better concurrent design (ConcurrentHashMap) which has a better strategy to implement concurrency: segments instead of synchronized.

字段概要

字段

限定符和类型	字段和说明
static String	__PARANAMER_DATA

从接口继承的字段 org.tio.utils.thoughtworksparanamer.Paranamer

EMPTY_NAMES

构造器概要

构造器

构造器和说明
CachingParanamer() Uses a DefaultParanamer as the implementation it delegates to.
CachingParanamer(Paranamer delegate) Specify a Paranamer instance to delegates to.

方法概要

限定符和类型	方法和说明
String[]	lookupParameterNames(AccessibleObject methodOrConstructor) Lookup the parameter names of a given method.
String[]	lookupParameterNames(AccessibleObject methodOrCtor, boolean throwExceptionIfMissing) Lookup the parameter names of a given method.
protected Map<AccessibleObject,String[]>	makeMethodCache()

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

__PARANAMER_DATA

public static final String __PARANAMER_DATA

另请参阅:

常量字段值

构造器详细资料

CachingParanamer

public CachingParanamer()

Uses a DefaultParanamer as the implementation it delegates to.

CachingParanamer

public CachingParanamer(Paranamer delegate)

Specify a Paranamer instance to delegates to.

参数:

delegate - the paranamer instance to use

方法详细资料

makeMethodCache

protected Map<AccessibleObject,String[]> makeMethodCache()

lookupParameterNames

public String[] lookupParameterNames(AccessibleObject methodOrConstructor)

从接口复制的说明: Paranamer

Lookup the parameter names of a given method.

指定者:

lookupParameterNames 在接口中 Paranamer

参数:

methodOrConstructor - the Method or Constructor for which the parameter names are looked up.

返回:

A list of the parameter names.

lookupParameterNames

public String[] lookupParameterNames(AccessibleObject methodOrCtor,
                                     boolean throwExceptionIfMissing)

从接口复制的说明: Paranamer

Lookup the parameter names of a given method.

指定者:

lookupParameterNames 在接口中 Paranamer

参数:

methodOrCtor - the Method or Constructor for which the parameter names are looked up.

throwExceptionIfMissing - whether to throw an exception if no Paranamer data found (versus return null).

返回:

A list of the parameter names.