是否可以在 AppEngine 上向 JUL 添加处理程序？

发布于 2024-12-18 05:22:33 字数 822 浏览 1 评论 0原文

我有一个使用 Java 的 AppEngine 应用程序。我正在使用 JUL (java.util.logging) 来记录服务器端日志。我正在创建一个门面调用 CustomLogger，其中它使用工厂在构造函数中创建一个 JUL 记录器：

@Inject
public CustomLogger( EmailLoggingHandler handler ){
    this.logger = Logger.getLogger( "ServerLogger" );
    logger.addHandler( handler );
}

CustomLogger 的实例绑定为 eagerSingleton，这意味着每个 Guice 实例只会实例化该类的一个实例。一切都正常，直到我注入自定义记录器（EmailLoggingHandler），它也是依赖树的一部分，作为 eagerSingleton。

   @Inject
    public EmailLoggingHandler( SendEmailHelper emailHelper ){
        this.emailHelper = emailHelper;
        setLevel(Level.SEVERE);
    }

我收到的错误：

Error injecting constructor, java.security.AccessControlException: access denied (java.util.logging.LoggingPermission control)

有人知道为什么会发生这种情况吗？

原文

I have an AppEngine application with Java.
I am using JUL (java.util.logging) to log the server side logs.
I am creating a facade call CustomLogger in which it creates a JUL logger in the constructor using the factory:

@Inject
public CustomLogger( EmailLoggingHandler handler ){
    this.logger = Logger.getLogger( "ServerLogger" );
    logger.addHandler( handler );
}

Instance of CustomLogger is bind as eagerSingleton meaning only one instance of this class will ever be instantiated per Guice instance.
Everything was working until I injected the custom logger (EmailLoggingHandler) which is also part of dependency tree as a eagerSingleton.

   @Inject
    public EmailLoggingHandler( SendEmailHelper emailHelper ){
        this.emailHelper = emailHelper;
        setLevel(Level.SEVERE);
    }

The error I am getting:

Error injecting constructor, java.security.AccessControlException: access denied (java.util.logging.LoggingPermission control)

Does anyone have any idea why this is happening?

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淡淡の花香 2024-12-25 05:22:33

当我尝试将处理程序挂接到 AppEngine 上的 JUL 时，我遇到了同样的问题。我通过避免调用 setLevel() 并仅使用我自己的级别变量来解决这个问题：

public class MyHandler extends Handler {

    private Level logLevel = Level.INFO;

    @Override
    public void publish(final LogRecord record) {
        if (record.getLevel().intValue() >= logLevel.intValue())
            // ...
    }

    ...

    public void setLogLevel(final Level lvl) {
        logLevel = Level.FINE;
    }
}

I had the same problem when I tried to hook my handler into JUL on AppEngine. I solved it by avoiding any calls to setLevel() and just using my own level variable:

public class MyHandler extends Handler {

    private Level logLevel = Level.INFO;

    @Override
    public void publish(final LogRecord record) {
        if (record.getLevel().intValue() >= logLevel.intValue())
            // ...
    }

    ...

    public void setLogLevel(final Level lvl) {
        logLevel = Level.FINE;
    }
}

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