net.jkcode.jkmvc.ttl

类 SttlInterceptor

net.jkcode.jkmvc.ttl.SttlInterceptor

public class SttlInterceptor

可传递ScopedTransferableThreadLocal的拦截器, 只传递ScopedTransferableThreadLocal, 无关ThreadLocal 特性: worker thread 在执行任务时, 会传递 caller thread的 ScopedTransferableThreadLocal数据 目标: 主要是为了解决异步执行时, 线程状态(ScopedTransferableThreadLocal)的传递问题, 如 jkmvc 将当前 Db/HttpRequest 等对象都是记录到 ScopedTransferableThreadLocal对象中, 以方便访问, 但是一旦异步执行后就丢失了 实现: 在执行之前传递一下 ScopedTransferableThreadLocal对象, 在执行后就恢复一下 ScopedTransferableThreadLocal对象 优化: 所有 intercept()方法的 caller thread 的 ScopedTransferableThreadLocal对象引用都是使用 ScopedTransferableThreadLocal.weakCopyLocal2Value(), 为 WeakHashMap, GC会回收, 但不频繁, 适用于短时间引用

字段概要

字段

限定符和类型

字段和说明

static SttlInterceptor

INSTANCE 可传递ScopedTransferableThreadLocal的拦截器, 只传递ScopedTransferableThreadLocal, 无关ThreadLocal 特性: worker thread 在执行任务时, 会传递 caller thread的 ScopedTransferableThreadLocal数据 目标: 主要是为了解决异步执行时, 线程状态(ScopedTransferableThreadLocal)的传递问题, 如 jkmvc 将当前 Db/HttpRequest 等对象都是记录到 ScopedTransferableThreadLocal对象中, 以方便访问, 但是一旦异步执行后就丢失了 实现: 在执行之前传递一下 ScopedTransferableThreadLocal对象, 在执行后就恢复一下 ScopedTransferableThreadLocal对象 优化: 所有 intercept()方法的 caller thread 的 ScopedTransferableThreadLocal对象引用都是使用 ScopedTransferableThreadLocal.weakCopyLocal2Value(), 为 WeakHashMap, GC会回收, 但不频繁, 适用于短时间引用

方法概要

限定符和类型	方法和说明
<T> java.util.concurrent.CompletableFuture<T>	intercept(java.util.concurrent.CompletableFuture<T> future, NonExistentClass callerLocals) 拦截 CompletableFuture
java.lang.Runnable	intercept(NonExistentClass callerLocals, java.lang.Runnable command) 拦截 Runnable
<T,U> java.util.function.Function<T,U>	intercept(NonExistentClass callerLocals, java.util.function.Function<T,U> fn) 拦截 Function
<T,U,V> java.util.function.BiFunction<T,U,? extends V>	intercept(NonExistentClass callerLocals, java.util.function.BiFunction<T,U,? extends V> fn) 拦截 BiFunction
<T> java.util.function.Consumer<T>	intercept(NonExistentClass callerLocals, java.util.function.Consumer<T> consumer) 拦截 Consumer
<T,U> java.util.function.BiConsumer<T,U>	intercept(NonExistentClass callerLocals, java.util.function.BiConsumer<T,U> consumer) 拦截 BiConsumer
kotlin.jvm.functions.Function0<java.lang.Object>	intercept(NonExistentClass callerLocals, kotlin.jvm.functions.Function0<? extends java.lang.Object> command) 拦截 command lambda
kotlin.jvm.functions.Function1<java.lang.Object,java.lang.Object>	intercept(NonExistentClass callerLocals, kotlin.jvm.functions.Function1<java.lang.Object,? extends java.lang.Object> fn) 拦截 fn lambda
kotlin.jvm.functions.Function2<java.lang.Object,java.lang.Throwable,java.lang.Object>	intercept(NonExistentClass callerLocals, kotlin.jvm.functions.Function2<java.lang.Object,? super java.lang.Throwable,? extends java.lang.Object> complete) 拦截 complete lambda
<T,U> java.util.function.BiConsumer<T,U>	interceptToBiConsumer(NonExistentClass callerLocals, kotlin.jvm.functions.Function2<? super T,? super U,? extends T> consumer) 拦截 BiConsumer
<T,U,V> java.util.function.BiFunction<T,U,? extends V>	interceptToBiFunction(NonExistentClass callerLocals, kotlin.jvm.functions.Function2<? super T,? super U,? extends V> fn) 拦截 BiFunction
<T> java.util.function.Consumer<T>	interceptToConsumer(NonExistentClass callerLocals, kotlin.jvm.functions.Function1<? super T,kotlin.Unit> consumer) 拦截 Consumer
<T,U> java.util.function.Function<T,U>	interceptToFunction(NonExistentClass callerLocals, kotlin.jvm.functions.Function1<? super T,? extends U> fn) 拦截 Function
java.lang.Runnable	interceptToRunnable(NonExistentClass callerLocals, kotlin.jvm.functions.Function0<kotlin.Unit> command) 拦截 Runnable

字段详细资料

INSTANCE

public static SttlInterceptor INSTANCE

可传递ScopedTransferableThreadLocal的拦截器, 只传递ScopedTransferableThreadLocal, 无关ThreadLocal 特性: worker thread 在执行任务时, 会传递 caller thread的 ScopedTransferableThreadLocal数据 目标: 主要是为了解决异步执行时, 线程状态(ScopedTransferableThreadLocal)的传递问题, 如 jkmvc 将当前 Db/HttpRequest 等对象都是记录到 ScopedTransferableThreadLocal对象中, 以方便访问, 但是一旦异步执行后就丢失了 实现: 在执行之前传递一下 ScopedTransferableThreadLocal对象, 在执行后就恢复一下 ScopedTransferableThreadLocal对象 优化: 所有 intercept()方法的 caller thread 的 ScopedTransferableThreadLocal对象引用都是使用 ScopedTransferableThreadLocal.weakCopyLocal2Value(), 为 WeakHashMap, GC会回收, 但不频繁, 适用于短时间引用

方法详细资料

intercept

public <T> java.util.concurrent.CompletableFuture<T> intercept(java.util.concurrent.CompletableFuture<T> future,
                                                               NonExistentClass callerLocals)

拦截 CompletableFuture

1. 不能使用 wrap() 来包装回调,因为回调完就恢复之前 ScopedTransferableThreadLocal, 改写的 ScopedTransferableThreadLocal 就丢了

2. CompletableFuture 只写不删(恢复), 但是 ScopedTransferableThreadLocal 自己有作用域管理, 会自己删除

3. 记住这个方法是有副作用的, 会改写 调用 CompletableFuture.complete()/completeExceptionally() 的线程的 ScopedTransferableThreadLocal, 不过一般都是通用线程池, 自身不具有 ScopedTransferableThreadLocal

intercept

public java.lang.Runnable intercept(NonExistentClass callerLocals,
                                    java.lang.Runnable command)

拦截 Runnable

intercept

public <T,U> java.util.function.Function<T,U> intercept(NonExistentClass callerLocals,
                                                        java.util.function.Function<T,U> fn)

拦截 Function

intercept

public <T,U,V> java.util.function.BiFunction<T,U,? extends V> intercept(NonExistentClass callerLocals,
                                                                        java.util.function.BiFunction<T,U,? extends V> fn)

拦截 BiFunction

intercept

public <T> java.util.function.Consumer<T> intercept(NonExistentClass callerLocals,
                                                    java.util.function.Consumer<T> consumer)

拦截 Consumer

intercept

public <T,U> java.util.function.BiConsumer<T,U> intercept(NonExistentClass callerLocals,
                                                          java.util.function.BiConsumer<T,U> consumer)

拦截 BiConsumer

intercept

public kotlin.jvm.functions.Function0<java.lang.Object> intercept(NonExistentClass callerLocals,
                                                                  kotlin.jvm.functions.Function0<? extends java.lang.Object> command)

拦截 command lambda

intercept

public kotlin.jvm.functions.Function1<java.lang.Object,java.lang.Object> intercept(NonExistentClass callerLocals,
                                                                                   kotlin.jvm.functions.Function1<java.lang.Object,? extends java.lang.Object> fn)

拦截 fn lambda

intercept

public kotlin.jvm.functions.Function2<java.lang.Object,java.lang.Throwable,java.lang.Object> intercept(NonExistentClass callerLocals,
                                                                                                       kotlin.jvm.functions.Function2<java.lang.Object,? super java.lang.Throwable,? extends java.lang.Object> complete)

拦截 complete lambda

interceptToRunnable

public java.lang.Runnable interceptToRunnable(NonExistentClass callerLocals,
                                              kotlin.jvm.functions.Function0<kotlin.Unit> command)

拦截 Runnable

interceptToFunction

public <T,U> java.util.function.Function<T,U> interceptToFunction(NonExistentClass callerLocals,
                                                                  kotlin.jvm.functions.Function1<? super T,? extends U> fn)

拦截 Function

interceptToBiFunction

public <T,U,V> java.util.function.BiFunction<T,U,? extends V> interceptToBiFunction(NonExistentClass callerLocals,
                                                                                    kotlin.jvm.functions.Function2<? super T,? super U,? extends V> fn)

拦截 BiFunction

interceptToConsumer

public <T> java.util.function.Consumer<T> interceptToConsumer(NonExistentClass callerLocals,
                                                              kotlin.jvm.functions.Function1<? super T,kotlin.Unit> consumer)

拦截 Consumer

interceptToBiConsumer

public <T,U> java.util.function.BiConsumer<T,U> interceptToBiConsumer(NonExistentClass callerLocals,
                                                                      kotlin.jvm.functions.Function2<? super T,? super U,? extends T> consumer)

拦截 BiConsumer