com.jdon.controller

类 WebAppUtil

java.lang.Object

com.jdon.controller.WebAppUtil

public class WebAppUtil
extends Object

Used in Web application. Using WebAppUtil, framework's user can get his businesss service object that defined in jdonframework.xml this is main and important client class for framework's user. ForumService forumService = (ForumService) WebAppUtil.getService("forumService", request); forumService.getForums(start);

作者:

banq

构造器概要

构造器

构造器和说明
WebAppUtil()

方法概要

限定符和类型	方法和说明
static Object	callService(String serviceName, String methodName, Object[] methodParams, javax.servlet.http.HttpServletRequest request) Command pattern for service invoke sample: browser url: /aaa.do?
static Object	getComponentInstance(String name, javax.servlet.http.HttpServletRequest request) get a component that registered in container. the component is not different from the service. the component instance is single instance Any intercepter will be disable
static Object	getComponentInstance(String name, javax.servlet.ServletContext sc) get a component that registered in container. the component is not different from the service. the component instance is single instance Any intercepter will be disable
static ContainerWrapper	getContainer(javax.servlet.http.HttpServletRequest request) get this Web application's container
static ContainerWrapper	getContainer(javax.servlet.ServletContext sc)
static String	getContainerKey() get the key for the application container user can directly get his container from servletcontext by the key.
static String	getInterceptorKey() get the key for the interceptor, by the key, use can add his interceptor to the container
static Object	getService(String name, javax.servlet.http.HttpServletRequest request) get a service from jdonframework.xml's service configure. the service maybe is a service .
static Object	getService(String name, javax.servlet.ServletContext sc) Difference with getComponentInstance method: 1. this method return new service instance each times. 2. call methods of the return service instance, will active interceptors.
static Object	getService(TargetMetaDef targetMetaDef, javax.servlet.http.HttpServletRequest request)

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

WebAppUtil

public WebAppUtil()

方法详细资料

getService

public static Object getService(String name,
                                javax.servlet.http.HttpServletRequest request)

get a service from jdonframework.xml's service configure. the service maybe is a service . this method will find HttpSession , if not exist then create a HttpSession, save the proxy object into the httpSesion. if you use the service with session support, must use this method, or use getService(String name, ServletContext sc) ;

if user has a business interface, so the interface can has two implemention:pojo or ejb, if is ejb, the ejb's local/remote interface must inherit the business interface. so the application's MVC will completely seperate from his business lay

usage: in jdonframework.xml:

UserDao ud = (UserDao)WebAppUtil.getService(“userJdbcDao”, request); UserDao is a interface.

参数:

name - String

request - HttpServletRequest

返回:

Object

抛出:

Exception

getService

public static Object getService(String name,
                                javax.servlet.ServletContext sc)

Difference with getComponentInstance method: 1. this method return new service instance each times. 2. call methods of the return service instance, will active interceptors. execept some interceptors about session, such as Stateful disable. 3. not support session ,if you need your jsp page not create cookie with JSESSIONID, use this method.

参数:

name -

sc -

返回:

getService

public static Object getService(TargetMetaDef targetMetaDef,
                                javax.servlet.http.HttpServletRequest request)

getComponentInstance

public static Object getComponentInstance(String name,
                                          javax.servlet.http.HttpServletRequest request)

get a component that registered in container. the component is not different from the service. the component instance is single instance Any intercepter will be disable

getComponentInstance

public static Object getComponentInstance(String name,
                                          javax.servlet.ServletContext sc)

get a component that registered in container. the component is not different from the service. the component instance is single instance Any intercepter will be disable

参数:

sc -

返回:

callService

public static Object callService(String serviceName,
                                 String methodName,
                                 Object[] methodParams,
                                 javax.servlet.http.HttpServletRequest request)
                          throws Exception

Command pattern for service invoke sample: browser url: /aaa.do?method=xxxxx xxxxx is the service's method, such as: public interface TestService{ void xxxxx(EventModel em); }

参数:

serviceName - the service name in jdonframework.xml

methodName - the method name

request -

model - the method parameter must be packed in a ModelIF object. if no method parameter, set it to null;

返回:

return the service dealing result

抛出:

Exception

另请参阅:

com.jdon.strutsutil.ServiceMethodAction

getContainerKey

public static String getContainerKey()

get the key for the application container user can directly get his container from servletcontext by the key.

返回:

String

getInterceptorKey

public static String getInterceptorKey()

get the key for the interceptor, by the key, use can add his interceptor to the container

返回:

String

getContainer

public static ContainerWrapper getContainer(javax.servlet.http.HttpServletRequest request)
                                     throws Exception

get this Web application's container

参数:

request - HttpServletRequest

返回:

ContainerWrapper

抛出:

Exception

getContainer

public static ContainerWrapper getContainer(javax.servlet.ServletContext sc)
                                     throws Exception

抛出:

Exception