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1.安装OpenDayLight控制器，启动并安装插件 2.用Python脚本搭建如下拓扑 代码如下： from mininet.topo import Topo class MyTopo(Topo): def __init__(self): # initilaize topology Topo.__init__(self) # add hosts and switches h1 = self.addHost('h1') h2 = self.addHost('h2') h3 = self.addHost('h3') s1 = self.addSwitch('s1') # add links self.addLink(h1, s1, 1, 1) self.addLink(h2, s1, 1, 2) self.addLink(h3, s1, 1, 3) topos = {'mytopo': (lambda: MyTopo())} pingall的结果： 3. ODL DLUX下发流表实现hardtimeout ODL内部设置： h2 ping h3： 实验结果：h2在20s内ping不通h3，20s后恢复 4.借助Postman调用ODL北向接口下发 安装postman，并直接解压，进入postman界面： 借助Postman，将JSON报文复制到Body内，将其Send

1.背景 Spring-Boot因其提供了各种开箱即用的插件，使得它成为了当今最为主流的Java Web开发框架之一。Mybatis是一个十分轻量好用的ORM框架。Redis是当今十分主流的分布式key-value型数据库，在web开发中，我们常用它来缓存数据库的查询结果。 本篇博客将介绍如何使用Spring-Boot快速搭建一个Web应用，并且采用Mybatis作为我们的ORM框架。为了提升性能，我们将Redis作为Mybatis的二级缓存。为了测试我们的代码，我们编写了单元测试，并且用H2内存数据库来生成我们的测试数据。通过该项目，我们希望读者可以快速掌握现代化Java Web开发的技巧以及最佳实践。 本文的示例代码可在Github中下载： https://github.com/JerryOrange/Spring-Boot-Mybatis-Redis-as-L2cache 2.Spring Boot 接下来，我们要编写Web API。假设我们的Web工程负责处理商家的产品（Product）。我们需要提供根据product id返回product信息的get接口和更新product信息的put接口。首先我们定义Product类，该类包括产品id，产品名称name以及价格price： public class Product implements Serializable { /

I have a Tomcat 7 running in Linux that I start via $CATALINA_HOME/bin/startup.sh and shutdown via $CATALINA_HOME/bin/shutdown.sh from /etc/init.d All is ok except 1 problem. Sometimes tomcat does not stop. Although I stop it and I see in catalina.out logs that is going down, if I do ps -ef I can still see the process running. What could be the problem? How can I debug this? My feeling is, that this is related to threads. So the parts that are suspicious are the following: 1) I use Log4j's LogManager to detect if the log4j configuration has been changed, but I do Log4jManager.shutdown on a

There is a h2-database file in my src directory (Java, Eclipse): h2test.db The problem: starting the h2.jar from the command line (and thus the h2 browser interface on port 8082), I have created 2 tables, 'test1' and 'test2' in h2test.db and I have put some data in them; when trying to access them from java code (JDBC), it throws me "table not found exception". A "show tables" from the java code shows a resultset with 0 rows. Also, when creating a new table ('newtest') from the java code (CREATE TABLE ... etc), I cannot see it when starting the h2.jar browser interface afterwards; just the

How to start H2 database in server mode. I need to start it from my application.I tried the following code: server = Server.createTcpServer().start(); Here is the properties for the connection: javabase.jdbc.url = jdbc:h2:tcp://localhost:9092/nio:~/source/db/database/db;AUTO_SERVER=TRUE javabase.jdbc.driver = org.h2.Driver javabase.jdbc.username = sa javabase.jdbc.password = When I run the program I got the following error: client.db.exception.DAOException: org.h2.jdbc.JdbcSQLException: Database may be already in use: "Locked by another process". Possible solutions: close all other connection

I have some questions about H2DB. I have H2DB database which stores data in files, I have 3 files test.18.log.db, test.data.db, test.index.db. I want get sql dump file like when I use mysqldump. Is it possible? Yes, there are multiple solutions. One is to run the SCRIPT SQL statement : SCRIPT TO 'fileName' Another is to use the Script tool : java org.h2.tools.Script -url <url> -user <user> -password <password> Then, there are also the RUNSCRIPT statement and RunScript tool. By the way, you should consider upgrading to a more recent version of H2. With newer versions, the two files .data.db and

(I've already seen the H2 database In memory - Init schema via Spring/Hibernate question; it is not applicable here.) I'd like to know if there's a setting in H2 that will allow me to auto-create a schema upon connecting to it. If it helps, I'm only interested in the in-memory case. H2 supports various semicolon-separated modifiers at the end of the URL, but I didn't find one for automatically creating a schema. Is there such a feature? Yes, H2 supports executing SQL statements when connecting . You could run a script, or just a statement or two: String url = "jdbc:h2:mem:test;" + "INIT=CREATE