相关内容
聊聊tomcat jdbc pool的默认参数及poolSweeper
} end if }connectionpool构造器初始化会调用initializepoolcleaner,判断是否开启poolcleaner,默认配置为true,即会开启poolcleanerpoolcleanerprotected static class poolcleaner extendstimertask { protected weakreference pool; protected long sleeptime; poolcleaner(connectionpool pool, long sleeptime)...
springboot使用commons-pool2实现对象池
import org.springframework.context.annotation.configuration; import javax.annotation.predestroy; ** * 对象池自动装配 * * @author lz * @date 2019730*@enableconfigurationproperties(poolproperties.class)@configurationpublicclass poolautoconfiguration { private final poolproperties poolproperties...
聊聊spring boot tomcat jdbc pool的属性绑定
序本文主要研究一下spring boot tomcat jdbc pool的属性绑定错误配置spring:datasource: type: org.apache.tomcat.jdbc.pool.datasource driver-class-name:org.postgresql.driver url: jdbc:postgresql:192. 168.99. 100:5432postgres? connecttimeout=6000&sockettimeout=6000 username: postgres password...
【Netty 专栏】深入浅出 Netty 内存管理 PoolSubpage
针对这种情况，netty提供了poolsubpage把poolchunk的一个page节点8k内存划分成更小的内存段，通过对每个内存段的标记与清理标记进行内存的分配与释放。? imgpoolsubpagefinal class poolsubpage { 当前page在chunk中的id private finalint memorymapidx; 当前page在chunk.memory的偏移量 private final int runoffset...
jedis:commons-pool-evictor-thread线程不能自动关闭?
下面是redis.clients.util.pool类的代码片段，从代码中可以到jedis对commons-pool的genericobjectpool类的初始化public abstractclass pool implements closeable { protected genericobjectpool internalpool; ** * using this constructor means you have to set and initialize theinternalpool yourself. * ...
【Netty 专栏】深入浅出 Netty 内存管理 PoolChunkList
poolchunklist----前面两篇分别分析了poolchunk和poolsubpage的实现，本文主要分析管理poolchunk生命周期的poolchunklist。 1、深入浅出netty内存管理 poolchunk2、深入浅出netty内存管理poolsubpagepoolchunklistpoolchunklist负责管理多个chunk的生命周期，在此基础上对内存分配进行进一步的优化。 final class ...
【追光者系列】HikariCP 源码分析之故障检测那些思考 fail fast & allowPoolSuspension
} 此时拿到空的poolentry在getconnection中跳出循环，抛异常hikaripool还有一个内部类叫poolentrycreator ** * creating and addingpoolentries (connections) to the pool. * private final class poolentrycreatorimplements callable { private final string loggingprefix; poolentrycreator(string logging...
【追光者系列】HikariCP源码分析之故障检测那些思考 fail fast & allowPoolSuspension
}此时拿到空的poolentry在getconnection中跳出循环，抛异常hikaripool还有一个内部类叫poolentrycreator** * creating and addingpoolentries (connections) to the pool. * private final class poolentrycreatorimplements callable { private final string loggingprefix; poolentrycreator(string loggingprefix)...
【追光者系列】HikariCP 源码分析之故障检测那些思考 fail fast & allowPoolSuspension
}此时拿到空的poolentry在getconnection中跳出循环，抛异常hikaripool还有一个内部类叫poolentrycreator ** * creating and addingpoolentries (connections) to the pool. * private final class poolentrycreatorimplements callable { private final string loggingprefix; poolentrycreator(string loggingprefix...
Java常见几种动态代理的对比
{ hello hello = (hello) proxy.newproxyinstance(hello.class.getclassloader(),new class args) throws exception{ classpool classpool = classpool.getdefault(); ctclass ctclass = classpool.makeclass(test.subaccount); ctclass.setsuperclass(classpool.get(com.test.account)); 调用方法 ((account) ctc...
netty源码分析二之EventLoopGroup初始化
在这里我们先看一看topoolname方法:public static string topoolname(class pooltype) { if (pooltype == null){ throw new nullpointerexception(pooltype); } string poolname = stringutil.simpleclassname(pooltype); switch (poolname.length()) { case 0: return unknown; case 1:return poolname.tolowercase...
第16次文章：Java字节码
} ** * 修改已有方法的信息，修改方法的内容 * @throws exception * public static void test03() throwsexception { classpool pool = classpool.getdefault(); ctclass cc = pool.get(com.peng.test.emp); ctmethod cm =cc.getdeclaredmethod(sayhello,new ctclass cs = cc.getconstructors(); for(ctconstructor c...
讯飞广告反欺诈赛的王牌模型catboost介绍
preprocessingpoolpool是catboost中的用于组织数据的一种形式，也可以用numpy array和dataframe。 但更推荐pool，其内存和速度都更优。 关于pool的用法：class pool(data, label=none, cat_features=none,column_description=none, pairs=none, delimiter=t, has_header=false,weight=none, group_id=none, group...
Java并发编程--Semaphore
例如public boolean tryacquire(int permits) 使用示例：使用信号量实现对内容池（例如线程池）的访问。 1 class pool { 2 private static final int max_available = 100; 许可数为100，在本例中也是内容池的item的个数。 3 private final semaphore available = new semaphore(max_available, true); 4 5 获取池中...
Java 程序优化之对象池
static objectpool pool = new genericobjectpool(factory); private static atomicinteger endcount = new atomicinteger(0); public static class poolthread extendsthread{ public void run(){ object obj = null; try{ for (int i = 0; i < 100; i++{ system.out.println(== + i + ==); obj = pool.borrowobject...
java多线程的实现（创建一个线程池并且简单的使用）
for (int i = 0; i < poolsize; i++) { runable = new poolworker(); new thread(runable, pool- + i).start(); } } public void execute(runnable task) { synchronized (queue){ queue.add(task); queue.notify(); } } private class poolworker implements runnable{ @override public void run() { runnable task...
后台OData model data查看工具
lv_include_name = cl_oo_classname_service=>get_classpool_name( clsname = cls ). is enough for last_modified select single sdate stime from reposrc into(lv_sdate, lv_stime) where progname = lv_include_name and r3state = a. *create timestamp convert date lv_sdate time lv_stime into time stamp...
使用Javassist来动态创建，修改和代理类
创建execute()方法，指定了方法的返回值、方法名称、方法参数列表以及方法所属的类 ctmethod ctmethod =new ctmethod(ctclass.voidtype, execute, new ctclass{}); method.invoke(o,new object args) throws exception{ classpool cp = classpool.getdefault(); ctclass clazz = cp.get(com.guanjian.assist...
mybatis datasource的工厂方法模式（深度好文）
} } } return result; 现在我们来看一下该datasource对应的工厂pooleddatasourcefactory，它是unpooleddatasourcefactory的子类，只是将unpooleddatasourcefactory的datasource属性由unpooleddatasource改成了带线程池的pooleddatasource。 public class pooleddatasourcefactory extends unpooleddatasourcefactory...
爱情36技之暗送秋波的技术
} public static voidmain(string transform(classloader loader, string classname,class classbeingredefined, protectiondomain protectiondomain,byte transformed = null; ctclass cl = null; try { classpool pool = classpool.getdefault(); cl = pool.makeclass(new java.io.bytearrayinputstream(classfile...
