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新兴开放源码J2EE应用平台
摘要: 新兴开放源码J2EE应用平台
新兴开放源码J2EE应用平台
注：这是两年前写的了，现在jbuilder已经用2005了，JBoss也用4。x了，mysql也用5.0了，新的功能
所能实现的功能毫无疑问不止这些，有时间再补上！
一．平台架构描述
本平台由三部分组成，开发环境、应用服务器环境和数据存储环境；
1． J2EE开发环境
JBuilder 7 企业版配合JBoss 3.0.0，开发环境配置如下：
a) 配置数据库连接驱动，我们使用MySql, 因此需要配置mysql_odbc或mysql_jdbc，其中如果使用jdbc的话，需要建立新的库，此库包含了mysql_jdbc驱动，并把该库加入到项目库中；
b) 配置JBoss的JBuider 7插件（配合插图）：
i. 首先把插件打包文件拷贝到JBuider 7/lib/ext目录中；
ii. 启动JBuilder, 在工具菜单中选择配置服务器；
iii. 从服务器列表中选择JBoss 3x；
iv. 然后选中“启用服务器”复选框；
v. 选择JBoss的安装目录，此时切换到“定制页”；
vi. 选择JBoss的起始目录和工作目录，最后确认提交；
vii. 并重启JBuilder，在项目属性里配置自己需要的服务器：其中，运行时服务器为Tomcat 4.0，项目服务器为不同模块服务对应不同的服务器；
2． J2EE应用服务器
应用服务器有三个模块组成：JBoss 3.0.0, Tomcat 4.0.3, Apache 2.0.4;
c) JBoss主要提供EJB等企业级组件和其他相关服务，其配置如下：
i. 首先，要配置java 1.4.1平台，即设置Java_home和classpath;
ii. 其次，解压JBoss（内嵌Tomcat 4）到特定文件夹；
d) 配置阿帕奇到tomcat的连接：
i. 修改apache的配置文件httpd.conf
Listen *:80(在所有地址上监听80端口)
ServerName Apache
DirectoryIndex index.html index.html.var index.html.en index.jsp（添加自己需要的目录起始文件名）
DefaultType application/octet-stream（使服务器可以处多种类型的文档）
AddDefaultCharset GB2312（自己需要的响应缺省字符集）
ServerName Apache
DirectoryIndex index.php index.html index.htm index.shtml index.html.en index.jsp（目录起始文件名）
ErrorLog logs/dummy-host.example.com-error_log
CustomLog logs/dummy-host.example.com-access_log common
（虚拟主机）
Include D:/Apache2/Apache2/conf/JK//mod_jk.conf（包含mod_jk的配置文件）
ii.mod_jk.conf的内容如下实例
LoadModule jk_module D:/Apache2/Apache2/conf/JK//mod_jk.dll
JkLogLevel info
JkOptions +ForwardKeySize +ForwardURICompat
JkWorkersFile D:/Apache2/Apache2/conf/JK/workers.properties
JkLogFile D:/Apache2/Apache2/conf/JK//mod_jk.log
JkMount /*.jsp ajp13
JkMount /servlet/* ajp13
Alias /test "E:/Room/testonline2.5/defaultroot"
Options Indexes FollowSymLinks MultiViews IncludesNoExec
AddOutputFilter Includes html
AllowOverride None
Order allow,deny
Allow from all
JkMount /test/servlet/* ajp13
JkMount /test/*.jsp ajp13
AllowOverride None
deny from all
Alias /account "E:/Room/wsopt/account"
Options Indexes FollowSymLinks MultiViews IncludesNoExec
AddOutputFilter Includes html
AllowOverride None
Order allow,deny
Allow from all
JkMount /account/* ajp13
JkMount /account/*.jsp ajp13
AllowOverride None
deny from all
iii.ajp13工作的配置文件workers.properties描述如下：
workers.tomcat.home=%tomcat_home%
workers.java.home=%java_home%
ps=\
worker.list=ajp13
worker.ajp13.port=8009
worker.ajp13.host=localhost
worker.ajp13.type=ajp13
worker.ajp13.1bfactor=1
参考：
# workers.properties -
#
# This file provides jk derived plugins with the needed information to
# connect to the different tomcat workers. Note that the distributed
# version of this file requires modification before it is usable by a
# plugin.
#
# As a general note, the characters $( and ) are used internally to define
# macros. Do not use them in your own configuration!!!
#
# Whenever you see a set of lines such as:
# x=value
# y=$(x)\something
#
# the final value for y will be value\something
#
# Normaly all you will need to do is un-comment and modify the first three
# properties, i.e. workers.tomcat_home, workers.java_home and ps.
# Most of the configuration is derived from these.
#
# When you are done updating workers.tomcat_home, workers.java_home and ps
# you should have 3 workers configured:
#
# - An ajp12 worker that connects to localhost:8007
# - An ajp13 worker that connects to localhost:8009
# - A jni inprocess worker.
# - A load balancer worker
#
# However by default the plugins will only use the ajp12 worker. To have
# the plugins use other workers you should modify the worker.list property.
#
#
# OPTIONS ( very important for jni mode )
#
# workers.tomcat_home should point to the location where you
# installed tomcat. This is where you have your conf, webapps and lib
# directories.
#
workers.tomcat_home=C:/Apache Tomcat 4.0
#
# workers.java_home should point to your Java installation. Normally
# you should have a bin and lib directories beneath it.
#
workers.java_home=c:/j2se
#
# You should configure your environment slash... ps=\ on NT and / on UNIX
# and maybe something different elsewhere.
#
ps=\
#
#------ ADVANCED MODE ------------------------------------------------
#---------------------------------------------------------------------
#
#
#------ DEFAULT worket list ------------------------------------------
#---------------------------------------------------------------------
#
#
# The workers that your plugins should create and work with
#
# Add 'inprocess' if you want JNI connector
worker.list=ajp13,ajp12
# , inprocess
#
#------ DEFAULT ajp12 WORKER DEFINITION ------------------------------
#---------------------------------------------------------------------
#
#
# Defining a worker named ajp12 and of type ajp12
# Note that the name and the type do not have to match.
#
worker.ajp12.port=8007
worker.ajp12.host=localhost
worker.ajp12.type=ajp12
#
# Specifies the load balance factor when used with
# a load balancing worker.
# Note:
# -- lbfactor must be > 0
# -- Low lbfactor means less work done by the worker.
worker.ajp12.lbfactor=1
#
#------ DEFAULT ajp13 WORKER DEFINITION ------------------------------
#---------------------------------------------------------------------
#
#
# Defining a worker named ajp13 and of type ajp13
# Note that the name and the type do not have to match.
#
worker.ajp13.port=8009
worker.ajp13.host=localhost
worker.ajp13.type=ajp13
#
# Specifies the load balance factor when used with
# a load balancing worker.
# Note:
# -- lbfactor must be > 0
# -- Low lbfactor means less work done by the worker.
worker.ajp13.lbfactor=1
#
# Specify the size of the open connection cache.
#worker.ajp13.cachesize
#
#------ DEFAULT LOAD BALANCER WORKER DEFINITION ----------------------
#---------------------------------------------------------------------
#
#
# The loadbalancer (type lb) workers perform wighted round-robin
# load balancing with sticky sessions.
# Note:
# -- If a worker dies, the load balancer will check its state
# once in a while. Until then all work is redirected to peer
# workers.
worker.loadbalancer.type=lb
worker.loadbalancer.balanced_workers=ajp13,ajp12
#
#------ DEFAULT JNI WORKER DEFINITION---------------------------------
#---------------------------------------------------------------------
#
#
# Defining a worker named inprocess and of type jni
# Note that the name and the type do not have to match.
#
worker.inprocess.type=jni
#
#------ CLASSPATH DEFINITION -----------------------------------------
#---------------------------------------------------------------------
#
#
# Additional class path components.
#
worker.inprocess.class_path=$(workers.tomcat_home)$(ps)lib$(ps)tomcat.jar
#
# Setting the command line for tomcat.
# Note: The cmd_line string may not contain spaces.
#
worker.inprocess.cmd_line=start
# Not needed, but can be customized.
#worker.inprocess.cmd_line=-config
#worker.inprocess.cmd_line=$(workers.tomcat_home)$(ps)conf$(ps)server.xml
#worker.inprocess.cmd_line=-home
#worker.inprocess.cmd_line=$(workers.tomcat_home)
#
# The JVM that we are about to use
#
# This is for Java2
#
# Windows
worker.inprocess.jvm_lib=$(workers.java_home)$(ps)jre$(ps)bin$(ps)client$(ps)jvm.dll
# IBM JDK1.3
#worker.inprocess.jvm_lib=$(workers.java_home)$(ps)jre$(ps)bin$(ps)classic$(ps)libjvm.so
# Unix - Sun VM or blackdown
#worker.inprocess.jvm_lib=$(workers.java_home)$(ps)jre$(ps)lib$(ps)i386$(ps)client$(ps)libjvm.so
#
# And this is for jdk1.1.X
#
#worker.inprocess.jvm_lib=$(workers.java_home)$(ps)bin$(ps)javai.dll
#
# Setting the place for the stdout and stderr of tomcat
#
worker.inprocess.stdout=$(workers.tomcat_home)$(ps)logs$(ps)inprocess.stdout
worker.inprocess.stderr=$(workers.tomcat_home)$(ps)logs$(ps)inprocess.stderr
#
# Setting the tomcat.home Java property
#
#worker.inprocess.sysprops=tomcat.home=$(workers.tomcat_home)
#
# Java system properties
#
# worker.inprocess.sysprops=java.compiler=NONE
# worker.inprocess.sysprops=myprop=mypropvalue
#
# Additional path components.
#
# worker.inprocess.ld_path=d:$(ps)SQLLIB$(ps)bin
#
iv.在tomcat的主配置文件server.xml中加入以下内容:
在
中加入ajp13服务的请求监听器：
在
中加入ajp13主机的监听器：
v. 另外要检查tomcat是否启动了ajp13服务，如果没有启动，要在tomcat主配置文件
中加入启动该服务的描述：
iii.注意：apache的
要与tomcat的
一一对应。
3． 数据存储环境
数据存储环境采用MySQL, 该数据库具有速度快，sql标准等特点。可以采用两种方式与之建立连接关系，即odbc和jdbc，前者是比较成熟的，而jdbc却会导致汉字乱码，原因是该数据库没有默认的字符集，仅在应用服务器上建立odbc数据源是可以接受的。
4． 该平台所需的文件列表如下：
a) mod_jk.dll
b) MyODBC-3.51.04.exe
c) j2sdk-1_4_1-windows-i586.exe
d) apache_2.0.40-win32-x86-no_ssl.exe
e) mysql-max-3.23.52-win.zip
f) mysqlgui-win32-static-1.7.5-2.zip
g) mysql-connector-java-2.0.14.zip
h) JBossEntWizard3x_v2.2.1_JBuilder7.zip
i) jboss-3.0.0_tomcat-4.0.3.zip
二．平台应用程序部署
1. Web应用程序部署
a) Web应用程序打包（.war）后放入%jboss_home%/server/default/deploy下，系统将能够自动部署，虚拟目录名就是包名；
b) 把打包文件解压到一特定文件夹，在阿帕奇的主配置文件中加入一个新的、别名与jboss的虚拟目录相同的虚拟目录（真实目录指向解压后的特定文件夹）
2. 企业应用程序部署
a) 在JBuilder中，同一个项目下建立ejb应用程序；
b) 配置ejb的jndi名；
c) 配置web应用程序的ejb属性，即ejb-ref-name, ejb-ref-link, ejb-home, ejb-remote;
d) 新建一企业应用程序（.ear），并编译之；
e) 部署企业应用程序（.ear）。
f) 这时，web应用程序的上下文为根。
三．实例程序：JBossTest, 一个登录的演示。
