'Bean没有公共构造函数不会参数'错误,尽管明显有一个? [英] 'Bean does not have a public constructor that does not take parameters' error despite clearly having one?
问题描述
错误:
[错误] CNTR5007E: websphere.jaxrs.service.EmailService bean
WebApiConsole的类#WebApiConsole.war#EmailService bean的
没有公共构造函数没有参数。
看到这里有错误的详细信息(不太可看): http://pic.dhe.ibm.com/infocenter/wxdinfo/v6r1/ index.jsp?topic =%2Fcom.ibm.websphere.messages.doc%2Fcom.ibm.ejs.container.container.html
代码:
package websphere.jaxrs.service;
import javax.ejb.EJB;
import javax.ejb.LocalBean;
import javax.ejb.Stateless;
import org.apache.commons.mail.Email;
import org.apache.commons.mail.EmailException;
import org.apache.commons.mail.SimpleEmail;
import websphere.jaxrs.helpers.ContextFinder;
/ **
*此类为邮件发送邮件提供了一个接口。它使用服务器环境变量来配置SMTP服务器和端口和身份验证。
*
* @author me
*
* /
@Stateless
@LocalBean
public class EmailService {
@EJB ContextFinder ctf;
private static final String EMAIL_PASSWORD_JNDI_NAME =EMAIL_PASSWORD;
private static final String EMAIL_USERNAME_JNDI_NAME =EMAIL_USERNAME;
private static final String SMTP_SERVER_JNDI_NAME =SMTP_SERVER;
private static final String SMTP_PORT_JNDI_NAME =SMTP_PORT;
private String username;
private String password;
私人字符串服务器;
私有整数端口;
public EmailService(){
username =(String)ctf.lookup(EMAIL_USERNAME_JNDI_NAME);
password =(String)ctf.lookup(EMAIL_PASSWORD_JNDI_NAME);
server =(String)ctf.lookup(SMTP_SERVER_JNDI_NAME);
port =(Integer)ctf.lookup(SMTP_PORT_JNDI_NAME);
}
/ **
*向特定用户发送电子邮件。
*
* @param sendTo
* @param subject
* @param message
* /
public void sendMail(String sendTo,String subject,String消息){
try {
Email email = new SimpleEmail();
email.setHostName(server);
email.setSmtpPort(port);
email.setAuthentication(用户名,密码);
email.setSSLOnConnect(true);
email.setFrom(username);
email.setSubject(subject);
email.setMsg(message);
email.addTo(sendTo);
email.send();
} catch(EmailException e){
System.err.println(Failed to email);
e.printStackTrace();
}
}
}
<我倾向于认为这是一个错误。我可能是错的,但是上面的类中的一切都是非常自包含的(没有我知道需要的其他配置),我不断得到这个错误。我尝试重新构建项目。
我做了一些实验,特别是删除sendMail()导致它是无错误的。
为什么不将构造函数的初始化删除为@PostConstruct方法?
@Stateless
public class EmailService {
@EJB ContextFinder ctf;
private static final String EMAIL_PASSWORD_JNDI_NAME =EMAIL_PASSWORD;
private static final String EMAIL_USERNAME_JNDI_NAME =EMAIL_USERNAME;
private static final String SMTP_SERVER_JNDI_NAME =SMTP_SERVER;
private static final String SMTP_PORT_JNDI_NAME =SMTP_PORT;
private String username;
private String password;
私人字符串服务器;
私有整数端口;
@PostConstruct
public void init(){
username =(String)ctf.lookup(EMAIL_USERNAME_JNDI_NAME);
password =(String)ctf.lookup(EMAIL_PASSWORD_JNDI_NAME);
server =(String)ctf.lookup(SMTP_SERVER_JNDI_NAME);
port =(Integer)ctf.lookup(SMTP_PORT_JNDI_NAME);
}
public void sendMail(String sendTo,String subject,String message){
//发送邮件
}
}
I have an EmailService EJB that has a very simple 'send_email' method. I'm receving the error in the title despite clearly having a public constructor that does not take parameters. Below is the exact error and the class code. This is very confusing.
Error:
[ERROR ] CNTR5007E: The websphere.jaxrs.service.EmailService bean class for the WebApiConsole#WebApiConsole.war#EmailService bean does not have a public constructor that does not take parameters.
See here for error details (not much to see): http://pic.dhe.ibm.com/infocenter/wxdinfo/v6r1/index.jsp?topic=%2Fcom.ibm.websphere.messages.doc%2Fcom.ibm.ejs.container.container.html
Code:
package websphere.jaxrs.service;
import javax.ejb.EJB;
import javax.ejb.LocalBean;
import javax.ejb.Stateless;
import org.apache.commons.mail.Email;
import org.apache.commons.mail.EmailException;
import org.apache.commons.mail.SimpleEmail;
import websphere.jaxrs.helpers.ContextFinder;
/**
* This class provides an interface for emailing messages. It uses server environment variables to configure SMTP server and port and authentication.
*
* @author me
*
*/
@Stateless
@LocalBean
public class EmailService {
@EJB ContextFinder ctf;
private static final String EMAIL_PASSWORD_JNDI_NAME = "EMAIL_PASSWORD";
private static final String EMAIL_USERNAME_JNDI_NAME = "EMAIL_USERNAME";
private static final String SMTP_SERVER_JNDI_NAME = "SMTP_SERVER";
private static final String SMTP_PORT_JNDI_NAME = "SMTP_PORT";
private String username;
private String password;
private String server;
private Integer port;
public EmailService() {
username = (String) ctf.lookup(EMAIL_USERNAME_JNDI_NAME);
password = (String) ctf.lookup(EMAIL_PASSWORD_JNDI_NAME);
server = (String) ctf.lookup(SMTP_SERVER_JNDI_NAME);
port = (Integer) ctf.lookup(SMTP_PORT_JNDI_NAME);
}
/**
* Sends an email to a specific user.
*
* @param sendTo
* @param subject
* @param message
*/
public void sendMail(String sendTo, String subject, String message) {
try {
Email email = new SimpleEmail();
email.setHostName(server);
email.setSmtpPort(port);
email.setAuthentication(username, password);
email.setSSLOnConnect(true);
email.setFrom(username);
email.setSubject(subject);
email.setMsg(message);
email.addTo(sendTo);
email.send();
} catch (EmailException e) {
System.err.println("Failed to email");
e.printStackTrace();
}
}
}
I'm inclined to think this is a bug. I might be wrong but but everything is pretty self-contained in the class above (no other configurations that I know of required) and I keep getting this error. I tried re-building the project.
[EDIT] I did some experimentation and very specifically, removing sendMail() causes it to be error free.
Why you don't remove initialization from constructor into a @PostConstruct method?
@Stateless
public class EmailService {
@EJB ContextFinder ctf;
private static final String EMAIL_PASSWORD_JNDI_NAME = "EMAIL_PASSWORD";
private static final String EMAIL_USERNAME_JNDI_NAME = "EMAIL_USERNAME";
private static final String SMTP_SERVER_JNDI_NAME = "SMTP_SERVER";
private static final String SMTP_PORT_JNDI_NAME = "SMTP_PORT";
private String username;
private String password;
private String server;
private Integer port;
@PostConstruct
public void init() {
username = (String) ctf.lookup(EMAIL_USERNAME_JNDI_NAME);
password = (String) ctf.lookup(EMAIL_PASSWORD_JNDI_NAME);
server = (String) ctf.lookup(SMTP_SERVER_JNDI_NAME);
port = (Integer) ctf.lookup(SMTP_PORT_JNDI_NAME);
}
public void sendMail(String sendTo, String subject, String message) {
// send mail
}
}
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