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Lift Framework example source code file (ThreadGlobal.scala)
The Lift Framework ThreadGlobal.scala source code/* * Copyright 2006-2011 WorldWide Conferencing, LLC * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package net.liftweb package util import common._ /** * This is a decorator for a ThreadLocal variable that provides * convenience methods to transform the variable to a Box and execute * functions in a "scope" wherein the variable may hold a different value. */ class ThreadGlobal[T] { private val threadLocal = new ThreadLocal[T] /** * Returns the current value of this variable. */ def value: T = threadLocal.get /** * Returns a Box containing the value of this ThreadGlobal * in a null-safe fashion. */ def box: Box[T] = Box !! value /** * Sets the value of this ThreadGlobal. * @param v the value to set. */ def set(v: T): ThreadGlobal[T] = { threadLocal.set(v) this } /** * Alias for <code>set(v: T) * @param v the value to set. */ def apply(v: T) = set(v) /** * Sets this ThreadGlobal's contents to the specified value, * executes the specified function, and then restores the ThreadGlobal * to its earlier value. This effectively creates a scope within * the execution of the current thread for the execution of the specified * function. * * @param x the value to temporarily set in this ThreadGlobal * @param f the function to execute */ def doWith[R](x: T)(f : => R) : R = { val original = value try { threadLocal.set(x) f } finally { threadLocal.set(original) } } } trait DynoVar[T] { private val threadLocal = new ThreadLocal[T] // threadLocal.set(Empty) def is: Box[T] = Box !! threadLocal.get def get = is def set(v: T): this.type = { threadLocal.set(v) this } def run[S](x: T)(f: => S): S = { val original = threadLocal.get try { threadLocal.set(x) f } finally { threadLocal.set(original) } } } Other Lift Framework examples (source code examples)Here is a short list of links related to this Lift Framework ThreadGlobal.scala source code file: |
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