fb538ea532
Motivation: When Netty runs in a managed environment such as web application server, Netty needs to provide an explicit way to remove the thread-local variables it created to prevent class loader leaks. FastThreadLocal uses different execution paths for storing a thread-local variable depending on the type of the current thread. It increases the complexity of thread-local removal. Modifications: - Moved FastThreadLocal and FastThreadLocalThread out of the internal package so that a user can use it. - FastThreadLocal now keeps track of all thread local variables it has initialized, and calling FastThreadLocal.removeAll() will remove all thread-local variables of the caller thread. - Added FastThreadLocal.size() for diagnostics and tests - Introduce InternalThreadLocalMap which is a mixture of hard-wired thread local variable fields and extensible indexed variables - FastThreadLocal now uses InternalThreadLocalMap to implement a thread-local variable. - Added ThreadDeathWatcher.unwatch() so that PooledByteBufAllocator tells it to stop watching when its thread-local cache has been freed by FastThreadLocal.removeAll(). - Added FastThreadLocalTest to ensure that removeAll() works - Added microbenchmark for FastThreadLocal and JDK ThreadLocal - Upgraded to JMH 0.9 Result: - A user can remove all thread-local variables Netty created, as long as he or she did not exit from the current thread. (Note that there's no way to remove a thread-local variable from outside of the thread.) - FastThreadLocal exposes more useful operations such as isSet() because we always implement a thread local variable via InternalThreadLocalMap instead of falling back to JDK ThreadLocal. - FastThreadLocalBenchmark shows that this change improves the performance of FastThreadLocal even more.
85 lines
2.7 KiB
XML
85 lines
2.7 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!--
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~ Copyright 2012 The Netty Project
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~
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~ The Netty Project licenses this file to you under the Apache License,
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~ version 2.0 (the "License"); you may not use this file except in compliance
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~ with the License. You may obtain a copy of the License at:
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~
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~ http://www.apache.org/licenses/LICENSE-2.0
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~
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~ Unless required by applicable law or agreed to in writing, software
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~ distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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~ WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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~ License for the specific language governing permissions and limitations
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~ under the License.
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-->
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<groupId>io.netty</groupId>
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<artifactId>netty-parent</artifactId>
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<version>4.0.21.Final-SNAPSHOT</version>
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</parent>
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<artifactId>netty-microbench</artifactId>
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<packaging>jar</packaging>
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<name>Netty/Microbench</name>
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<properties>
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<!-- Skip tests by default; run only if -DskipTests=false is specified -->
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<skipTests>true</skipTests>
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</properties>
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<dependencies>
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<dependency>
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<groupId>${project.groupId}</groupId>
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<artifactId>netty-handler</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>${project.groupId}</groupId>
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<artifactId>netty-codec-http</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>org.openjdk.jmh</groupId>
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<artifactId>jmh-core</artifactId>
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<version>0.9</version>
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</dependency>
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<dependency>
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<groupId>org.openjdk.jmh</groupId>
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<artifactId>jmh-generator-annprocess</artifactId>
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<version>0.9</version>
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<scope>provided</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<artifactId>maven-deploy-plugin</artifactId>
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<configuration>
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<skip>true</skip>
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</configuration>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-surefire-plugin</artifactId>
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<configuration>
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<excludes>
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<exclude>**/AbstractMicrobenchmark.java</exclude>
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<exclude>**/*$*.class</exclude>
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</excludes>
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<systemPropertyVariables>
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<perfReportDir>${project.build.directory}/reports/performance/</perfReportDir>
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</systemPropertyVariables>
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</configuration>
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</plugin>
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</plugins>
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</build>
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</project>
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