ZK | 易学教程

Relative File Path Problem

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问题 I am developing a portlet that is trying to read in a config file. I am developing it in an eclipse project. I currently have the config file placed inside my WEB-INF folder (which is in root/WEB-INF/), and its called config.properties. How can I access this file using relative path in my java source code? (which is in root/src/package/mysource.java) For example, File myfile = new File("WHAT DO I PUT HERE/config.properties"); Any help you can provide would be great! 回答1: Since this is a

Kerberos基本配置

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1 选择一台机器运行KDC，安装Kerberos相关服务 yum install -y krb5-devel krb5-server krb5-workstation 2 配置Kerberos，包括krb5.conf和kdc.conf，修改其中的realm，把默认的EXAMPLE.COM修改为自己要定义的值 vim /etc/krb5.conf [logging] default = FILE:/var/log/krb5libs.log kdc = FILE:/var/log/krb5kdc.log admin_server = FILE:/var/log/kadmind.log [libdefaults] default_realm = WANGFEI.COM dns_lookup_realm = false dns_lookup_kdc = false ticket_lifetime = 24h renew_lifetime = 7d forwardable = true [realms] WANGFEI.COM = { kdc = node1 admin_server = node1 } [domain_realm] .WANGFEI.COM = WANGFEI.COM WANGFEI.COM = WANGFEI.COM vim /var/kerberos/krb5kdc

where to put applicationcontext.xml and .hbm files?

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问题 I'm learning spring hibernate zk stack, and doing my first crud following this tutorial I put applicationContext.xml into webapp/WEB-INF, and .hbm.xml to resources/mappings But I dont know why my hbm files keep showing can not find my pojos. in github https://github.com/kossel/firstzk I have this structure applicationContext.xml <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <!-- set other Hibernate

ZooKeeper 入门看这篇就够了

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 什么是 ZooKeeper？ ZooKeeper 是一个分布式的，开放源码的分布式应用程序协同服务。ZooKeeper 的设计目标是将那些复杂且容易出错的分布式一致性服务封装起来，构成一个高效可靠的原语集，并以一系列简单易用的接口提供给用户使用。 ZooKeeper 发展历史 ZooKeeper 最早起源于雅虎研究院的一个研究小组。在当时，研究人员发现，在雅虎内部很多大型系统基本都需要依赖一个类似的系统来进行分布式协同，但是这些系统往往都存在分布式单点问题。所以，雅虎的开发人员就开发了一个通用的无单点问题的分布式协调框架，这就是 ZooKeeper。ZooKeeper 之后在开源界被大量使用，下面列出了 3 个著名开源项目是如何使用 ZooKeeper： Hadoop：使用 ZooKeeper 做 Namenode 的高可用。 HBase：保证集群中只有一个 master，保存 hbase:meta 表的位置，保存集群中的 RegionServer 列表。 Kafka：集群成员管理，controller 节点选举。 ZooKeeper 应用场景很多分布式协调服务都可以用 ZooKeeper 来做，其中典型应用场景如下：配置管理（configuration management）：如果我们做普通的 Java

How to create custom pagination in ZK

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问题 I could not find any tutorial regarding custom pagination in zk. ZK provides it's default pagination and it's quite good but my customer needs different pagination style. So, how can I create custom pagination in ZK. Any help please ? I have a listbox like this : <listbox id=”bidLbx” mold=”paging”> <listitem> ... </listitem> </listbox> It displays ZK's default pagination like: 1 2 3 4 5 Next Last but with out option to select per page row number. So, I need my own Buttons and per page

How to dynamically add listheaders and listcells in ZK

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问题 I am totally new in ZK. I need to create N listheaders and N listcells in my zul file. But I do not know how to do it from my java controller and I am not using MVVM. The problem would be something like: @Wire private Window idWindow; private Listheader header; private Listcell item1; @Override public void onCreate(Event event) { header.setLabel("laaaa");// It would set just one header but I can have many (N headers) and same for items } <zk> <window id="idWindow" title="nameWindow" apply=

zookeeper简单安装和使用（单机版）

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单机版zk安装解压 tar -zxvf zookeeper-3.4.6.tar.gz -C /usr/zookeeper/ 配置 vim conf/zk.cfg tickTime=2000 initLimit=10 syncLimit=5 dataDir=/usr/zookeeper/data clientPort=2181 单机版zk使用启动 . / bin / zkServer . sh start conf / zk . cfg 停止 . / bin / zkServer . sh stop conf / zk . cfg 运行信息如果在zk安装的根目录中启动zk，在其目录中应该会有 zookeeper.out 这个日志文件，可以从其中看到一些运行信息。来源： CSDN 作者：郭建華链接： https://blog.csdn.net/ACE_GJH/article/details/103655951

How do I get the current DOM with Selenium Java 2.8?

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问题 I'm using the latest version of Selenium and the chromedriver to test a ZK application. During the test, I'd like to dump the DOM (or part of it) to help me find the elements I need (and probably help people who have to maintain the test). The method WebDriver.getPageSource() looked promising but it only returns the HTML as it was sent by the server, not the result after running all the JavaScript code. The JavaScript code is run; I can find elements by ID that I can't see in the output of

4000余字为你讲透Codis内部工作原理

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 一、引言 Codis是一个分布式 Redis 解决方案，可以管理数量巨大的Redis节点。个推作为专业的第三方推送服务商，多年来专注于为开发者提供高效稳定的消息推送服务。每天通过个推平台下发的消息数量可达百亿级别。基于个推推送业务对数据量、并发量以及速度的要求非常高，实践发现，单个Redis节点性能容易出现瓶颈，综合考虑各方面因素后，我们选择了Codis来更好地管理和使用Redis。二、选择Codis的原因随着公司业务规模的快速增长，我们对数据量的存储需求也越来越大，实践表明，在单个Redis的节点实例下，高并发、海量的存储数据很容易使内存出现暴涨。此外，每一个Redis的节点，其内存也是受限的，主要有以下两个原因：一是内存过大，在进行数据同步时，全量同步的方式会导致时间过长，从而增加同步失败的风险；二是越来越多的redis节点将导致后期巨大的维护成本。因此，我们对Twemproxy、Codis和Redis Cluster 三种主流redis节点管理的解决方案进行了深入调研。推特开源的Twemproxy最大的缺点是无法平滑的扩缩容。而Redis Cluster要求客户端必须支持cluster协议，使用Redis Cluster需要升级客户端，这对很多存量业务是很大的成本。此外，Redis

ZK Customize Calender Popup

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问题 I want to add clear button in Calender modal Popup.In my application lots of dateboxes are there.I restrict the user only to select the date not to enter. But in some cases I need to clear the date. Because of read only I am not able to clear it manually. I need to customize the calender which will reflect other places. And user can clear the datebox by clicking clear button in calender window. Is there any way to add clear button in calender to fulfill my requirement? Thanks in Advance!! 回答1