蚯蚓: tips

终于实现了Tapestry4 EntityForm和QueryTable的组件化

Wed, 26 Mar 2008 08:03:35 GMT

取代以前的BaseEditPage 和 BaseListingPage 两个基础抽象类,所有的Page统一继承自 BasePage（自定义的继承自org.apache.tapestry.html.BasePage）

实现BasePage的单一化

QueryTable的实现思路

传入Query和Parameters 取代掉source参数,用Query和Parameters构建一个model提供给TableView

看下demo 类

EmployeeList.java

package app.demo.web.pages;

import java.util.HashMap;
import java.util.Map;

import org.apache.commons.lang.StringUtils;
import org.apache.tapestry.IRequestCycle;
import org.apache.tapestry.event.PageBeginRenderListener;
import org.apache.tapestry.event.PageEvent;

import common.tapestry.components.table.QueryTable;
import common.tapestry.html.BasePage;

public abstract class EmployeeList extends BasePage implements
PageBeginRenderListener {

public abstract String getName();

public void pageBeginRender(PageEvent event) {
}

QueryTable getTable_1() {
return (QueryTable) getComponent("table1");
}

public void doSubmit() {
  Map map = new HashMap();
  map.put("A", "1");

  String hql = "select a from Employee a where 1=:A";
  if(StringUtils.isNotBlank(getName())){
   hql = hql +" and a.Name like :name";
   map.put("name", "%" + getName() +"%");
  }
  getTable_1().setQueryAndParameters(hql, map);
}

public void activateExternalPage(Object[] obj,IRequestCycle cycle){
super.activateExternalPage(obj, cycle);
getTable_1().setQueryAction(false);
}
}

html模板

Extension Tapestry4`s restart service to clear my login cookies

Mon, 24 Mar 2008 06:38:11 GMT

接上篇,自定义一个logout service 把我的login cookies 清楚掉

Tapestry .java

package common.tapestry;

public final class Tapestry {
public static final String LOGOUT_SERVICE = "logout";
}

LogoutService.java
package common.tapestry.engine;

import java.io.IOException;

import org.apache.tapestry.IRequestCycle;
import org.apache.tapestry.engine.RestartService;

import common.tapestry.Tapestry;

public class LogoutService extends RestartService {
private LoginCookiesManager loginCookiesManager;

public void setLoginCookiesManager(
LoginCookiesManager loginCookiesManager) {
this.loginCookiesManager = loginCookiesManager;
}

public void service(IRequestCycle cycle) throws IOException {
loginCookiesManager.removeCookies();
super.service(cycle);
}

public String getName() {
return Tapestry.LOGOUT_SERVICE;
}
}

hivemodule.xml
<?xml version="1.0"?>
<module id="common.tapestry" version="1.0.0">

<service-point id="LogoutService" interface="org.apache.tapestry.engine.IEngineService">
        <invoke-factory>
            <construct class="common.tapestry.engine.LogoutService">
            <set-service property="request" service-id="tapestry.globals.HttpServletRequest" />
                <set-service property="response" service-id="tapestry.globals.HttpServletResponse" />
                <set-object property="servletPath" value="app-property:org.apache.tapestry.servlet-path" />
                <set-object property="linkFactory" value="infrastructure:linkFactory" />
                <set-object property="loginCookiesManager" value="service:common.tapestry.LoginCookiesManager"/>
             </construct>
        </invoke-factory>
    </service-point>

</module>

in your Pages
<a jwcid="@ServiceLink" href="#" service="ognl:@common.tapestry.Tapestry@LOGOUT_SERVICE" target="_top">退出</a>

How to use cookies in tapestry4? my Tapestry4.1.5`LoginCookiesManagerImpl

Mon, 24 Mar 2008 06:23:52 GMT

How to use cookies in tapestry4? my Tapestry4.1.5`LoginCookiesManagerImpl

思路
首先BasePage是需要登陆的 protected ,
BasePage实现org.apache.tapestry.event.PageValidateListener方法,判断asm对象Visit是否已经登陆
如没visit==null,去cookies找回用户名和密码从cycle中获得Login页面
Login页面实现common.tapestry.IConstructVisit接口。LoginPage登陆时保存用户名密码到cookies中,并对cookies的值加密,
cookies的key是baseUrl+key,取回时对cookies值解密,加密解密的password放到Application的meta信息中

实现代码如下
抽象接口LoginCookiesManager

package common.tapestry.engine;

public interface LoginCookiesManager {

String APPLICATION_META_KEY_DEFAULT_COOKIES_IS_ENCRYPTION = "common.tapestry.default-cookies-encrypt";//是否需要加密,默认加密
String APPLICATION_META_KEY_DEFAULT_COOKIES_ENCRYPTION_KEY = "common.tapestry.default-cookies-encryption-key";//加密的password

public static final String COOKIES_KEY_LOGIN_USERNAME = "USERNAME";
public static final String COOKIES_KEY_LOGIN_PASSWORD = "PASSWORD";

/**
* 将用户名和密码写入cookies
* @param username
* @param password
* @param maxAge
*/
void writeCookies(String username,String password,int maxAge);
/**
* 清除用户名和密码cookies
*/
void removeCookies();
/**
* 从cookies中获得用户名
* @return
*/
String getUsername();
/**
* 从cookies中获得密码
* @return
*/
String getPassword();
}

LoginCookiesManagerImpl 实现

package common.tapestry.engine;

import org.apache.hivemind.ApplicationRuntimeException;
import org.apache.tapestry.engine.IPropertySource;
import org.apache.tapestry.services.AbsoluteURLBuilder;
import org.apache.tapestry.services.CookieSource;
import org.apache.tapestry.web.WebRequest;
import org.jasypt.encryption.pbe.StandardPBEStringEncryptor;
import org.jasypt.exceptions.EncryptionOperationNotPossibleException;

public class LoginCookiesManagerImpl implements LoginCookiesManager {
private static StandardPBEStringEncryptor standardPBEStringEncryptor = new StandardPBEStringEncryptor();
private IPropertySource applicationPropertySource;
private CookieSource cookieSource;
private WebRequest request;
private AbsoluteURLBuilder absoluteURLBuilder;

public void setApplicationPropertySource(
   IPropertySource applicationPropertySource) {
  this.applicationPropertySource = applicationPropertySource;
  String encrypKey = getCookiesEncryptionKey();
  standardPBEStringEncryptor.setPassword(encrypKey);
}

private String decrypt(String value) {
  String tmp = value;
  try {
   tmp = standardPBEStringEncryptor.decrypt(value);
  } catch (EncryptionOperationNotPossibleException e) {
   throw new ApplicationRuntimeException("please clear your cookies");
  }
  return tmp;
}

private String encrypt(String value) {
return standardPBEStringEncryptor.encrypt(value);
}

private String getCookiesEncryptionKey() {
  String temp = applicationPropertySource
    .getPropertyValue(APPLICATION_META_KEY_DEFAULT_COOKIES_ENCRYPTION_KEY);
  return (temp != null) ? temp : "crypassword";
}

private boolean isCookiesEncryption() {
  String temp = applicationPropertySource
    .getPropertyValue(APPLICATION_META_KEY_DEFAULT_COOKIES_IS_ENCRYPTION);
  return (temp != null) ? Boolean.valueOf(temp).booleanValue() : true;
}

public void removeCookies() {
  String cookiesKeyLogin_username = generateApplicationCookiesKey_Login__Username();
  String cookiesKeyLogin_password = generateApplicationCookiesKey_Login__Password();
  cookieSource.removeCookieValue(cookiesKeyLogin_username);
  cookieSource.removeCookieValue(cookiesKeyLogin_password);
}

public void writeCookies(String username, String password, int maxAge) {
writeCookiesValue_Login__Username(username, maxAge);
writeCookiesValue_Login__Password(password, maxAge);
}

public String getUsername() {
  String value = cookieSource
    .readCookieValue(generateApplicationCookiesKey_Login__Username());
  if (isCookiesEncryption()) {
   value = decrypt(value);
  }
  return value;
}

public String getPassword() {
  String value = cookieSource
    .readCookieValue(generateApplicationCookiesKey_Login__Password());
  if (isCookiesEncryption()) {
   value = decrypt(value);
  }
  return value;
}

private void writeCookiesValue_Login__Username(String username, int maxAge) {
  String key = generateApplicationCookiesKey_Login__Username();
  String value = username;
  if (isCookiesEncryption()) {
   value = encrypt(username);
  }
  cookieSource.writeCookieValue(key, value, maxAge);
}

private void writeCookiesValue_Login__Password(String password, int maxAge) {
  String key = generateApplicationCookiesKey_Login__Password();
  String value = password;
  if (isCookiesEncryption()) {
   value = encrypt(password);
  }
  cookieSource.writeCookieValue(key, value, maxAge);
}

private String generateApplicationCookiesKey_Login__Username() {
return generateApplicationCookiesKey(COOKIES_KEY_LOGIN_USERNAME);
}

private String generateApplicationCookiesKey_Login__Password() {
return generateApplicationCookiesKey(COOKIES_KEY_LOGIN_PASSWORD);
}

private String generateApplicationCookiesKey(String key) {
String contextPath = request.getContextPath();
return absoluteURLBuilder.constructURL(contextPath + "/") + key;
}

public void setCookieSource(CookieSource cookieSource) {
this.cookieSource = cookieSource;
}

public void setRequest(WebRequest request) {
this.request = request;
}

public void setAbsoluteURLBuilder(AbsoluteURLBuilder absoluteURLBuilder) {
this.absoluteURLBuilder = absoluteURLBuilder;
}

}

hivemodule.xml配置

<?xml version="1.0"?>
<module id="common.tapestry" version="1.0.0">
<service-point id="LoginCookiesManager" interface="common.tapestry.engine.LoginCookiesManager">
<invoke-factory>
   <construct class="common.tapestry.engine.LoginCookiesManagerImpl" >
     <set-object property="cookieSource" value="infrastructure:cookieSource"/>
     <set-service property="absoluteURLBuilder" service-id="tapestry.request.AbsoluteURLBuilder"/>
              <set-service property="request" service-id="tapestry.globals.WebRequest"/>
              <set-object property="applicationPropertySource" value="service:tapestry.props.ApplicationPropertySource"/>
      </construct>
  </invoke-factory>
</service-point>

使用

在BasePage中获得该service

public LoginCookiesManager getLoginCookiesManager() {
  LoginCookiesManager svc = (LoginCookiesManager) getRequestCycle().getInfrastructure().getProperty("loginCookiesManager");
  return svc;
}

/**
* 判断用户是否已经登陆
*
* @return
*/
private boolean isUserLoggedIn() {
  Object asmVisit = this.getRequestCycle().getInfrastructure().getApplicationStateManager().get(ASM_VISIT);

  if (!(asmVisit instanceof IVisit)) {
   throw new ApplicationRuntimeException(
     "The visit class must implements " + IVisit.class);
  }
  IVisit visit = (IVisit) asmVisit;
  if (visit == null || (visit != null && !visit.isLoggedIn())) {
   IPage loginPage = getRequestCycle().getPage(PAGE_LOGIN);
   if (loginPage instanceof IConstructVisit) {
    //从cookies中找回用户名和密码
    String cookiesLoginUsername = getLoginCookiesManager().getUsername();
    String cookiesLoginPassword = getLoginCookiesManager().getPassword();
    IConstructVisit constructVisit = (IConstructVisit) loginPage;
    visit = constructVisit.doConstructVisit(this.getRequestCycle(),
      cookiesLoginUsername, cookiesLoginPassword);
   } else {
    throw new ApplicationRuntimeException("The " + PAGE_LOGIN
      + " class must implements " + IConstructVisit.class);
   }
  }
  if (visit == null)
   return Boolean.FALSE.booleanValue();
  return visit.isLoggedIn();
}

Login类必须实现如下接口
package common.tapestry;

import org.apache.tapestry.IRequestCycle;

public interface IConstructVisit {
public IVisit doConstructVisit(IRequestCycle cycle, String username,String password);
}

Tapestry4.1.5`s common Base Border Component

Mon, 24 Mar 2008 02:59:26 GMT

Tapestry4.1.5`s common Base Border Component

考虑到每个项目都必须具有Border组件,所以把这个组件提到Base项目的ext组件库
但是每个项目的基本css又各不相同,这个css可以使用Tapestry的meta提供给Border
我在{yourTapestyServlet}.application中增加
<meta key="common.tapestry.components.border.stylesheets" value="css/POJO*.css,css/sys*.css"/>
其value是一个通配符表达式,灵感来源于spring的加载*.xml的写法,","号分割多个匹配

来看我们的Border.jwc规范

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE component-specification PUBLIC
"-//Apache Software Foundation//Tapestry Specification 4.0//EN"
"http://jakarta.apache.org/tapestry/dtd/Tapestry_4_0.dtd">

<component-specification allow-body="yes" allow-informal-parameters="no" class="common.tapestry.components.Border">
<parameter name="title"/>
<parameter name="ajaxDelegate"/>

</component-specification>

html模板

Border.java

package common.tapestry.components;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;

import org.apache.tapestry.BaseComponent;
import org.apache.tapestry.IAsset;
import org.apache.tapestry.asset.ContextAsset;
import org.apache.tapestry.web.WebContext;
import org.apache.tapestry.web.WebContextResource;
import org.springframework.core.io.Resource;
import org.springframework.web.context.support.ServletContextResource;
import org.springframework.web.context.support.ServletContextResourcePatternResolver;

public abstract class Border extends BaseComponent {
// public abstract String getStylesheetResource(); //inject meta can`not
// use?

public abstract HttpServletRequest getHttpServletRequest();

public abstract WebContext getWebContext();

public static final String APPLICATION_META_KEY_DEFAULT_BORDER_STYLE = "common.tapestry.components.border.stylesheets";
public static final String DEFAULT_STYLESHEET_RESOURCE = "css/system_*.css";

public String getStylesheetResource() {
  String tmp = getPage().getRequestCycle().getInfrastructure()
    .getApplicationPropertySource().getPropertyValue(
      APPLICATION_META_KEY_DEFAULT_BORDER_STYLE);
  return (tmp != null) ? tmp : DEFAULT_STYLESHEET_RESOURCE;
}

public abstract IAsset[] getCssAsset();

public abstract void setCssAsset(IAsset[] oo);

public IAsset[] getStylesheets() {

if (getCssAsset() == null) {

   String _stylesheetResource = (getStylesheetResource() != null) ? getStylesheetResource()
     : DEFAULT_STYLESHEET_RESOURCE;
   List list = new ArrayList();
   ServletContext _servletContext = getHttpServletRequest()
     .getSession().getServletContext();
   ServletContextResourcePatternResolver servletContextResourcePatternResolver = new ServletContextResourcePatternResolver(
     _servletContext);

String[] _stylesheetResources = _stylesheetResource.split(",");

for (int i = 0; i < _stylesheetResources.length; i++) {

    try {
     Resource[] resources = servletContextResourcePatternResolver
       .getResources(_stylesheetResources[i]);

for (int j = 0; j < resources.length; j++) {
ServletContextResource resource = (ServletContextResource) resources[j];

      WebContextResource _resourceLocation = new WebContextResource(
        getWebContext(), resource.getPath());
      IAsset asset = new ContextAsset(
        common.tapestry.TapestryUtils
          .getContextPath(getPage()
            .getRequestCycle()),
        _resourceLocation, getLocation(), getPage()
          .getRequestCycle());
      list.add(asset);
     }

    } catch (IOException e) {
     e.printStackTrace();
    }
   }

IAsset[] tmp = (IAsset[])list.toArray(new IAsset[list.size()]);
   setCssAsset(tmp);
  }
  return getCssAsset();
}
}

Tapestry4.1.5 how to inject spring`s bean to pages

Fri, 21 Mar 2008 01:45:36 GMT

Tapestry4.1.5 how to inject spring`s bean to pages

1、in web.xml config spring

<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>

<listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener>

2、put the tapestry-spring-1.0.0.jar to your classpath
you can download here
http://howardlewisship.com/tapestry-javaforge/tapestry-spring/

ok you can use <inject property="userInfoService" object="spring:userInfoService"/> in your .page file
or use Annotations inject the service

but how to get the spring`s beans in the java code ?
--------------------------------------------------------------

3、config your ${yourApp}/WEB-INF/hivemodule.xml

put the springObjectProvider to the tapestry.Infrastructure

ok in your code you can

org.apache.hivemind.service.ObjectProvider springprovider springprovider = (ObjectProvider) infrastructure.getProperty("springprovider");

YourSpringBean yourSpringBean = (YourSpringBean)springprovider.provideObject(null, null, yourSpringBeanId, null);

Tapestry5的无侵入式框架实现use Annotations?

Mon, 14 May 2007 14:14:18 GMT

Tapestry5称使用JDK5的Annotations实现无侵入式的框架，我看起来Annotations依然是侵入到了类,:(

敏捷的思维正在一步步渗透到Java Framework中,现在不仅要求类与类之间要解藕，类和Framework之间也要解耦,

途径:1)硬编码,extends/implements

2)xml

3)Framework的实践约定,比如说 public void **doActionListener(),方法名称的匹配说明了这是个Action监听器,够敏捷吧

我期待的Tapestry Control BackingBean是更纯的Java类,看来这个实现除了xml + implments,只剩下Framework的约定才能实现了,毕竟不用xml,不用Annotations,不用extends/implements 你得告诉Framework container 这个BackingBean 是怎么跟template粘起来的!

利用org.apache.commons.io.FileUtils快速读写文件

Tue, 27 Mar 2007 04:45:12 GMT

String fileName = "C://11.txt";
  File file = new File(fileName);
  String fileContent = "";
  try {
   fileContent = org.apache.commons.io.FileUtils.readFileToString(file, "GBK");
  } catch (IOException e) {
   e.printStackTrace();
  }
  fileContent +="Helloworld";
  try {
   org.apache.commons.io.FileUtils.writeStringToFile(file, fileContent, "GBK");
  } catch (IOException e) {
   e.printStackTrace();
  }