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2014年5月5日 星期一

ADF Integrate Oracle EBS R12

From: Polin Wei

環境：
ADF version: 11.1.1.6.0
Oracle EBS version: R12.2.3
程式的目的在於取得 EBS 登入時的使用者相關資訊。整個程式架構如下圖：
■ADF 的程式面：
Step 01: 在 ViewController 依序建立 Java Class：ConnectionProvider、EBizUtil、EBSWrapperFilter、以及存取使用者資訊的 Java Bean: UserInfo
資料的
ConnectionProvider.java
package com.oracle.view;

import java.sql.Connection;
import java.sql.SQLException;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;

public class ConnectionProvider {
    private static DataSource ebsDS = null;
    static{
        try {
            Context ctx = new InitialContext();
            ebsDS = (DataSource) ctx.lookup("jdbc/TEST32");
          
            // your datasource jndi name as defined during configuration
            if (ctx != null)
                ctx.close();
          
        } catch (Exception e) {
            // TODO: Add catch code
            //ne.printStackTrace(); //ideally you should log it
            throw new RuntimeException(e);
            // means jndi setup is not correct or doesn't exist
        }
    }
  
    private ConnectionProvider() {
        super();
    }
  

   public static Connection getConnection() throws SQLException{
        if (ebsDS == null)
            throw new IllegalStateException("AppsDatasource is not properly initialized or available");
        return ebsDS.getConnection();
    }

  
}
PS: 在 EBS 環境中是以 jdbc 的模式取得資料庫連線，可以進入 weblogic 的 Services-> Data Sources 查看，如：EBSDataSource 的 JNDI: jdbc/TEST32 ，並可以得知要佈署到那一個主機上:oacore_cluster1

EBizUtil.java
package com.oracle.view;

import java.sql.Connection;
import java.sql.SQLException;
import java.util.logging.Level;
import java.util.logging.Logger;
import oracle.apps.fnd.ext.common.EBiz;


public class EBizUtil {
    public EBizUtil() {
        super();
    }
    private static final Logger logger = Logger.getLogger(EBizUtil.class.getName());
    private static EBiz INSTANCE = null;
    static {
        Connection connection = null;
        try {
            connection = ConnectionProvider.getConnection();
            // DO NOT hard code applServerID for a real application
            // Get applServerID as CONTEXT-PARAM from web.xml or elsewhere
            INSTANCE = new EBiz(connection, "F1CB87199593E5F4E0431F030A0AD0AB31310251131793525291714692481335");
        } catch (SQLException e) {
            logger.log(Level.SEVERE, "SQLException while creating EBiz instance -->", e);
            throw new RuntimeException(e);
        } catch (Exception e) {
            logger.log(Level.SEVERE, "Exception while creating EBiz instance -->", e);
            throw new RuntimeException(e);
        } finally {
            if (connection != null) {
                try {
                    connection.close();
                } catch (SQLException e) {
                    throw new RuntimeException(e);
                }
            }
        }
    }

    public static EBiz getEBizInstance() {
        return INSTANCE;
    }  
  
}
PS: APPL_SERVER_ID 可以到 EBS APP Server 路徑下的 $INST_TOP/appl/fnd/12.0.0/secure/TEST32.dbc 取得
Server ID :
APPL_SERVER_ID=F1CB87199593E5F4E0431F030A0AD0AB31310251131793525291714692481335
EBSWrapperFilter.java
package com.oracle.view;

import java.io.IOException;
import java.sql.SQLException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import oracle.apps.fnd.ext.common.AppsRequestWrapper;
import oracle.apps.fnd.ext.common.AppsRequestWrapper.WrapperException;

public class EBSWrapperFilter implements Filter {
    public EBSWrapperFilter() {
        super();
    }


    private static final Logger logger = Logger.getLogger(EBSWrapperFilter.class.getName());
  
    public void init(FilterConfig filterConfig) {
        logger.info("Filter initialized ");
    }

    public void doFilter(ServletRequest request, ServletResponse response,  FilterChain chain) throws IOException,ServletException {
        AppsRequestWrapper wrapper = null;
        logger.info("-current URI =" + ((HttpServletRequest)request).getRequestURI());

        try {
          
            wrapper = new AppsRequestWrapper((HttpServletRequest)request, (HttpServletResponse)response, ConnectionProvider.getConnection(), EBizUtil.getEBizInstance());
          
        } catch (WrapperException e2) {
            logger.log(Level.SEVERE, "WrapperException error encountered ", e2);
            throw new ServletException(e2);
        } catch (SQLException e2) {
            logger.log(Level.SEVERE, "SQLException error encountered ", e2);
            throw new ServletException(e2);
        }
        try {
            logger.info("Created AppsRequestWrapper object." + " Continuing the filter chain.");
            chain.doFilter(wrapper, response);
            logger.info("- the filter chain ends");
        } finally {
            //AppsRequestWrapper caches a connection internally.
            //AppsRequestWrapper.getConnection()--returns this connection this connection can be used in doGet()/doPost() service layer
            //whenever our application requires a connection in order to service the current request.
            //When AppsRequestWrapper instance is in use, this connection should not be closed by other code.
            //At this point, we are done using AppsRequestWrapper instance so, as good practice, we are going to close (release) this connection now.
            if (wrapper != null) {
                try {
                    logger.info("- releasing the connection attached to the" + " current AppsRequestWrapper instance ");
                    wrapper.getConnection().close();
                } catch (SQLException e3) {
                    logger.log(Level.WARNING, "SQLException error while closing connection--", e3);
                    throw new ServletException(e3);
                }
            }
            wrapper = null;
        }
    }

    public void destroy() {
        logger.info("Filter destroyed ");
    }
}

UserInfo.java
package com.oracle.bean;

import java.util.Map;
import javax.faces.context.FacesContext;
import javax.faces.event.PhaseEvent;
import oracle.apps.fnd.ext.common.AppsRequestWrapper;
import oracle.apps.fnd.ext.common.Session;

public class UserInfo {
    private String user;
    private String userInfo;

    public UserInfo() {
        super();
    }


    public void setUser(String user) {
        this.user = user;
    }

    public String getUser() {
        return user;
    }


    public void beforePhase(PhaseEvent phaseEvent) {
        // Add event code here...
        AppsRequestWrapper wrappedRequest =
            (AppsRequestWrapper)FacesContext.getCurrentInstance().getExternalContext().getRequest();

        Session session = wrappedRequest.getAppsSession();

        setUser(session.getUserName());

        Map columns = session.getInfo();
        StringBuffer temp = new StringBuffer();
        temp.append("
");
        for (Object key : columns.keySet()) {
            temp.append(" ");
            temp.append("");
            temp.append("");
            temp.append(" ");
        }
        temp.append("
");
            temp.append(key);
            temp.append("		");
            temp.append(columns.get(key));
            temp.append("
");

        setUserInfo(temp.toString());

    }

    public void setUserInfo(String userInfo) {
        this.userInfo = userInfo;
    }

    public String getUserInfo() {
        return userInfo;
    }
}

Step 02：在 adfc-config.xml 建立 view: userInfo.jspx 及 設定 Managed Beans
userInfo.jspx
版面：PageGroupLayout ：layout = vertical
      OutPutText：value="Hello #{pageFlowScope.userInfoBean.user}!!"
　　　　　　　　  inlineStyle="font-size:medium; color:Red;"
      Separator
    　　　OutPutText：value="#User Info:
#{pageFlowScope.userInfoBean.userInfo}"
　　　　　　　　　　　escape="false"
                  inlineStyle="font-size:medium;"
 


Managed Beans：userInfoBean
 


Step 03: 設定 userInfo.jspx 的 beforePhase
這是在 UserInfo.java 的一段程式
    public void beforePhase(PhaseEvent phaseEvent) {
        // Add event code here...
        AppsRequestWrapper wrappedRequest =
            (AppsRequestWrapper)FacesContext.getCurrentInstance().getExternalContext().getRequest();

        Session session = wrappedRequest.getAppsSession();

        setUser(session.getUserName());

        Map columns = session.getInfo();
        StringBuffer temp = new StringBuffer();
        temp.append("
");
        for (Object key : columns.keySet()) {
            temp.append(" ");
            temp.append("");
            temp.append("");
            temp.append(" ");
        }
        temp.append("
");
            temp.append(key);
            temp.append("		");
            temp.append(columns.get(key));
            temp.append("
");

        setUserInfo(temp.toString());

    }

Step 04 : web.xml 中設定 Filters
 
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