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锁定老帖子 主题：基于插件开发模式的WEB开发
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发表时间：2009-05-04
1、通过ServletBridge把OSGI框架部署到Tomcat容器中去。
程序文件整体结构图如下： 2、通过一个runtime插件把相关需要启动的插件启动起来。 3、在config.ini文件中配置runtime插件在OSGI启动时即启动。 4、利用WebServiceExporter类来注册WebService服务 5、CXFNonSpringServlet类是用来提供Servlet监听 6、Spring通过插件形式集成到框架中来。 声明：ITeye文章版权属于作者，受法律保护。没有作者书面许可不得转载。
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发表时间：2009-05-04
最后修改：2009-05-04
程序结构图：
Application.war |-index.jsp |-WEB-INF |-classes |-eclipse | |-configuration | | |-config.ini | |-plugins | | |-com.**.***.***_1.0.0.jar | | |-com.***.***.server.cxfbundle_1.0.0.jar | | |-com.***.***.server.runtime_1.0.0.jar | | |-com.springsource.net.sf.cglib-2.1.3.jar | | |-com.springsource.org.aopalliance-1.0.0.jar | | |-com.springsource.slf4j.api-1.5.0.jar | | |-com.springsource.slf4j.log4j-1.5.0.jar | | |-com.springsource.slf4j.org.apache.commons.logging-1.5.0.jar | | |-log4j.osgi-1.2.15-SNAPSHOT.jar | | |-org.eclipse.equinox.common_3.4.0.v20080421-2006.jar | | |-org.eclipse.equinox.http.registry_1.0.100.v20080427-0830.jar | | |-org.eclipse.equinox.http.servlet_1.0.100.v20080427-0830.jar | | |-org.eclipse.equinox.http.servletbridge_1.0.0.v20080427-0830.jar | | |-org.eclipse.equinox.registry_3.4.0.v20080516-0950.jar | | |-org.eclipse.osgi_3.4.2.R34x_v20080826-1230.jar | | |-org.eclipse.update.configurator_3.2.201.R34x_v20080819.jar | | |-spring-aop-2.5.6.jar | | |-spring-beans-2.5.6.jar | | |-spring-context-2.5.6.jar | | |-spring-context-support-2.5.6.jar | | |-spring-core-2.5.6.jar | | |-spring-osgi-core-1.2.0-m2.jar | | |-spring-osgi-extender-1.2.0-m2.jar | | |-spring-osgi-io-1.2.0-m2.jar | |-launch.ini |-lib | |-servletbridge.jar |-web.xml |
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发表时间：2009-05-04
web.xml内容
<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> <servlet> <servlet-name>equinoxbridgeservlet</servlet-name> <servlet-class>org.eclipse.equinox.servletbridge.BridgeServlet</servlet-class> <init-param> <param-name>enableFrameworkControls</param-name> <param-value>false</param-value> </init-param> <init-param> <param-name>commandline</param-name> <param-value>-console</param-value> </init-param> <init-param> <param-name>extendedFrameworkExports</param-name> <param-value></param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>equinoxbridgeservlet</servlet-name> <url-pattern>/*</url-pattern> </servlet-mapping> </web-app> |
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发表时间：2009-05-04
最后修改：2009-05-04
config.ini内容：
# # initial bundles # osgi.bundles=\ org.eclipse.equinox.common@2:start, \ org.eclipse.update.configurator@3:start, \ com.xxx.xxx.server.runtime@start # # start level # osgi.bundles.defaultStartLevel=4 -------------------- launch.in内容 # Eclipse Runtime Configuration Overrides # These properties are loaded prior to starting the framework and can also be used to override System Properties # @null is a special value used to override and clear the framework's copy of a System Property prior to starting the framework # "*" can be used together with @null to clear System Properties that match a prefix name. osgi.*=@null org.osgi.*=@null eclipse.*=@null osgi.parentClassloader=ext osgi.contextClassLoaderParent=ext |
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发表时间：2009-05-04
最后修改：2009-05-04
runtime插件(该插件也就只有一个java程序)的Activator.java内容：
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
public class Activator implements BundleActivator {
private static final String SPRING_CONFIG_PATH = "/META-INF/spring";
private static final String BUNDLE_ACTIVATOR = "Bundle-Activator";
// private static Log log = LogFactory.getLog(Activator.class);
/*
* (non-Javadoc)
* @see org.osgi.framework.BundleActivator#start(org.osgi.framework.BundleContext)
*/
public void start(BundleContext context) throws Exception {
// get this bundle
Bundle thisBundle = context.getBundle();
// get all bundles
Bundle[] bundles = context.getBundles();
// for each bundle except this bundle
for (Bundle bundle : bundles)
{
// if bundle can be start
if (thisBundle != bundle && canBeStart(bundle))
{
startBundle(bundle);
}
}
}
private void startBundle(Bundle bundle)
{
// start the bundle
try
{
bundle.start();
}
catch (Exception e)
{
// log.error("start bundle " + bundle.getSymbolicName() + " failed", e);
System.out.println("start bundle " + bundle.getSymbolicName() + " failed.");
System.out.println(e.toString());
}
}
private boolean canBeStart(Bundle bundle)
{
// if bundle is ready to start
if (bundle.getState() == Bundle.RESOLVED
|| bundle.getState() == Bundle.STARTING
|| bundle.getState() == Bundle.INSTALLED)
{
// start bundle if bundle activator is set
if (bundle.getHeaders().get(BUNDLE_ACTIVATOR) != null)
{
return true;
}
// start bundle if it is spring powered
else if (bundle.getEntry(SPRING_CONFIG_PATH) != null)
{
return true;
}
}
return false;
}
/*
* (non-Javadoc)
* @see org.osgi.framework.BundleActivator#stop(org.osgi.framework.BundleContext)
*/
public void stop(BundleContext context) throws Exception {
}
}
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发表时间：2009-05-04
最后修改：2009-05-04
WebServiceExporter.java内容：
import org.apache.cxf.frontend.ServerFactoryBean;
import org.apache.cxf.jaxb.JAXBDataBinding;
import org.springframework.beans.factory.InitializingBean;
public class WebServiceExporter implements InitializingBean
{
// URL访问地址
private String address = null;
// Service接口的实现类对象
private Object serviceImplBean = null;
// Service接口
private Class< ? > serviceInterface = null;
public void afterPropertiesSet() throws Exception
{
/**
* 检查参数的合法性
*/
checkServiceInterface();
ServerFactoryBean factory = new ServerFactoryBean();
factory.setServiceClass(serviceInterface);
factory.setServiceBean(serviceImplBean);
factory.setAddress(address);
factory.getServiceFactory().setDataBinding(new JAXBDataBinding());
// System.out.println("Address : " + address);
factory.create();
}
/**
* Check whether a service reference has been set, and whether it matches
* the specified service.
* @see #setServiceInterface
* @see #setService
* @throws IllegalArgumentException
* IllegalArgumentException
*/
private void checkServiceInterface() throws Exception
{
if (serviceInterface == null)
{
throw new Exception("Property 'serviceInterface' is required");
}
if (serviceImplBean instanceof String)
{
throw new Exception(
"Service ["
+ serviceImplBean
+ "] is a String "
+ "rather than an actual service reference: Have you accidentally specified "
+ "the service bean name as value instead of as reference?");
}
if (!serviceInterface.isInstance(serviceImplBean))
{
throw new Exception("Service interface ["
+ serviceInterface.getName()
+ "] needs to be implemented by service ["
+ serviceImplBean + "] of class ["
+ serviceImplBean.getClass().getName() + "]");
}
}
public void setAddress(String address)
{
if (address.startsWith("/"))
{
this.address = address;
}
else
{
this.address = "/" + address;
}
}
public void setServiceInterface(Class< ? > serviceInterface)
{
this.serviceInterface = serviceInterface;
}
public void setServiceImplBean(Object serviceImplBean)
{
this.serviceImplBean = serviceImplBean;
}
}
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发表时间：2009-05-04
最后修改：2009-05-04
CXFWrapperServlet.java内容
import java.util.HashMap;
import java.util.Map;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import org.apache.cxf.Bus;
import org.apache.cxf.BusFactory;
import org.apache.cxf.transport.servlet.CXFNonSpringServlet;
public class CXFWrapperServlet extends CXFNonSpringServlet
{
private static final long serialVersionUID = -6994879522066465447L;
private static Map<String, Bus> busMap = new HashMap<String, Bus>();
public void init(ServletConfig servletConfig) throws ServletException
{
super.init(servletConfig);
busMap.put("servletBus", getBus());
Bus bus = CXFWrapperServlet.getMyBus("servletBus");
BusFactory.setDefaultBus(bus);
}
@Override
public void loadBus(ServletConfig servletConfig) throws ServletException
{
this.bus = BusFactory.getDefaultBus(true);
super.loadBus(servletConfig);
}
public static Bus getMyBus(String key)
{
return busMap.get(key);
}
}
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发表时间：2009-05-04
最后修改：2009-05-04
Spring配置文件：
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:osgi="http://www.springframework.org/schema/osgi" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/osgi http://www.springframework.org/schema/osgi/spring-osgi.xsd"> <!-- define service bean --> <bean id="IProjMgrServiceClient" class="com.***.***.server.pm.service.impl.ProjMgrServiceClientImpl" /> <bean class="com.***.***.server.cxfbundle.server.WebServiceExporter"> <property name="address" value="projmgr" /> <property name="serviceImplBean" ref="IProjMgrServiceClient" /> <property name="serviceInterface" value="com.***.***.server.pm.service.IProjMgrServiceClient" /> </bean> <bean id="ILoginOnline" class="com.***.***.server.security.login.impls.LoginOnlineImpl" /> <bean class="com.***.***.server.cxfbundle.server.WebServiceExporter"> <property name="address" value="login" /> <property name="serviceImplBean" ref="ILoginOnline" /> <property name="serviceInterface" value="com.***.***.server.security.login.interfaces.ILoginOnline" /> </bean> </beans> |
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发表时间：2009-05-04
最后修改：2009-05-04
说明一下：
1、由于不能上传附件（主要是因为公司信息安全限制），所以demo无法传，对于新手很抱歉，但是希望对于那些正在研究如何进行插件开发的人有点帮助。 2、带有***的插件都是我自己写的插件包。 3、我们的项目服务端没有UI，所以没有太多考虑服务端UI的事情，但是我细想了一下，应该可以集成到这里面的，大家可以补充一下，共同学习。 4、我们的项目服务端暂时只提供SOAP服务。所有的界面都在客户端，客户端是RCP |
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发表时间：2009-05-04
请问是否有过实际的项目应用，性能如何？
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