我需要帮助编写OSGI模块。这是我写的代码。它还没有完成，但我可以用Netbeans编译它。
/*
* OSGI Module for Sessions handling
*/
package com.SessionHandle;
/** include SQL Packages */
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import javax.sql.DataSource;
import javax.annotation.Resource;
// or import javax.faces.bean.ManagedBean;
public class sessionLogger {
public String error_Message = null;
public String error_Database = null;
/** Call the Oracle JDBC Connection driver */
@Resource(name="java:/Oracle")
private DataSource ds;
/** method for checking active sessions into the Oracle database.
* The calling module sends the UserId, UserIP, UserBrowserId.
* If the check is successful the LastRefreshTime is updated with
* with the current time.
*/
/*
CREATE TABLE "ACTIVESESSIONS"(
"SessionId" Char(20 ) NOT NULL,
"UserId" Varchar2(30 ) NOT NULL,
"LoginTime" Timestamp(6),
"LastRefreshTime" Timestamp(6),
"UserIP" Varchar2(30 ),
"UserBrowserID" Varchar2(30 ))
*/
public Integer activeSessionCheck(String sessionId, String userId,
String loginTime, String lastRefreshTime,
String userIp, String userBrowserId) throws SQLException {
String storedSession = null;
error_Message = null;
String SQL_Statement = null;
if (ds == null) throw new SQLException( error_Database = "No data source");
Connection conn = ds.getConnection();
if (conn == null) throw new SQLException( error_Database = "No connection");
try {
conn.setAutoCommit(false);
boolean committed = false;
try {
SQL_Statement = "SELECT * from ACTIVESESSIONS WHERE SessionId = ? AND UserIP = ? AND UserBrowserID = ?";
PreparedStatement sessionQuery = conn.prepareStatement(SQL_Statement);
sessionQuery.setString(1, sessionId);
sessionQuery.setString(2, userIp);
sessionQuery.setString(3, userBrowserId);
ResultSet result = sessionQuery.executeQuery();
if(result.next()){
storedSession = result.getString("SessionId");
}
conn.commit();
committed = true;
} finally {
if (!committed) conn.rollback();
}
}
finally {
conn.close();
}
/** If the session is not null update the session expire time */
if (storedSession != null){
try {
conn.setAutoCommit(false);
boolean committed = false;
try { /* insert into Oracle the default system(Linux) time */
SQL_Statement = "UPDATE ACTIVESESSIONS SET LastRefreshTime = SYSDATE WHERE SessionId = ?";
PreparedStatement insertQuery = conn.prepareStatement(SQL_Statement);
insertQuery.setString(1, sessionId);
insertQuery.executeUpdate();
conn.commit();
committed = true;
} finally {
if (!committed) conn.rollback();
}
}
finally {
conn.close();
}
/** if the session is registered successfully return 0 */
return 0;
} else {
/** if the session is not registered return 1 */
return 1;
}
/*!!!!!! dobavi vav faces-config novo navigation rule - ako se varne otgovor 1 da prepra6ta klienta na login menu */
}
/** method for recording user activity into the Oracle database */
/*
CREATE TABLE "SESSIONSLOG"(
"SessionID" Varchar2(30 ) NOT NULL,
"Username" Varchar2(30 ),
"IpAddress" Varchar2(30 ),
"WebBrowserID" Varchar2(30 ),
"LoginTime" Timestamp(6),
"LogoutTime" Timestamp(6))
*/
public void sessionLog(String sessionId, String userName,
String ipAddress, String webBrowserId,
String loginTime, String logoutTime) throws SQLException {
String storedPassword = null;
error_Message = null;
String SQL_Statement = null;
if (ds == null) throw new SQLException( error_Database = "No data source");
Connection conn = ds.getConnection();
if (conn == null) throw new SQLException( error_Database = "No connection");
try {
conn.setAutoCommit(false);
boolean committed = false;
try {
SQL_Statement = "SELECT passwd from USERS WHERE userz = ?";
PreparedStatement passwordQuery = conn.prepareStatement(SQL_Statement);
passwordQuery.setString(1, sessionId);
ResultSet result = passwordQuery.executeQuery();
if(result.next()){
storedPassword = result.getString("passwd");
}
conn.commit();
committed = true;
} finally {
if (!committed) conn.rollback();
}
}
finally {
conn.close();
}
/** if the user is not found or password don't match display error message*/
if (storedPassword == null){
error_Message = "Invalid Username!";
} else {
error_Message = "Invalid Password!";
}
return;
}
/** method for recording sessions activity into the Oracle database */
/*
CREATE TABLE "ACTIVESESSIONSLOG"(
"SessionId" Varchar2(30 ) NOT NULL,
"UserId" Varchar2(30 ),
"ActivityStart" Timestamp(6),
"ActivityEnd" Timestamp(6),
"Activity" Clob)
*/
public void activeSessionLog(String sessionId, String userId,
String activityStart, String activityEnd,
String Activity) throws SQLException {
String storedPassword = null;
error_Message = null;
String SQL_Statement = null;
if (ds == null) throw new SQLException( error_Database = "No data source");
Connection conn = ds.getConnection();
if (conn == null) throw new SQLException( error_Database = "No connection");
try {
conn.setAutoCommit(false);
boolean committed = false;
try {
SQL_Statement = "SELECT passwd from USERS WHERE userz = ?";
PreparedStatement passwordQuery = conn.prepareStatement(SQL_Statement);
passwordQuery.setString(1, sessionId);
ResultSet result = passwordQuery.executeQuery();
if(result.next()){
storedPassword = result.getString("passwd");
}
conn.commit();
committed = true;
} finally {
if (!committed) conn.rollback();
}
}
finally {
conn.close();
}
/** if the user is not found or password don't match display error message*/
if (storedPassword == null){
error_Message = "Invalid Username!";
} else {
error_Message = "Invalid Password!";
}
return;
}
}
这是OSGI包的文件结构：
rcbandit@rcbandit-laptop:~/NetBeansProjects$ tree SL_24
SL_24
├── nbactions.xml
├── pom.xml
├── src
│ └── main
│ ├── assembly
│ │ └── felix.xml
│ ├── java
│ │ └── com
│ │ ├── SessionHandle
│ │ │ └── sessionLogger.java
│ │ └── SL_24
│ │ └── Activator.java
│ └── resources
│ └── com
│ └── SL_24
└── target
├── classes
│ ├── com
│ │ ├── SessionHandle
│ │ │ └── sessionLogger.class
│ │ └── SL_24
│ │ └── Activator.class
│ └── META-INF
│ └── MANIFEST.MF
├── generated-sources
│ └── annotations
├── SL_24-1.0-SNAPSHOT.jar
└── surefire
19 directories, 9 files
这是Activator类，我不知道如何写：
package com.SL_24;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
public class Activator implements BundleActivator {
public void start(BundleContext context) throws Exception {
System.out.println("Module SL_24 is Loaded!");
}
public void stop(BundleContext context) throws Exception {
System.out.println("Module SL_24 in Unloaded!");
}
}
当我尝试将其部署到JBoss 7.1.0服务器时出现问题。似乎激活器类没有正确编写。你能帮助我以正确的方式编写它吗？之后如何调用OSGI bundle insight EAR包的方法？
敬意，
彼得
答案 0 :(得分：1)
根据评论中给出的错误跟踪，我发现JBoss中有一个NullPointerException被抛出。这似乎是JBoss中的一个错误，因此应该在JBoss论坛上进行讨论。