AccessControlException setting up logging in an applet
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From: Qu0ll on 15 Dec 2008 06:44 I am trying to configure the built-in Java logging within an applet using 6u11 but I encounter the following: java.security.AccessControlException: access denied (java.util.logging.LoggingPermission control) at java.security.AccessControlContext.checkPermission(Unknown Source) at java.security.AccessController.checkPermission(Unknown Source) at java.lang.SecurityManager.checkPermission(Unknown Source) at java.util.logging.LogManager.checkAccess(Unknown Source) at java.util.logging.LogManager.readConfiguration(Unknown Source) at com.test.MyApplet.init(MyApplet.java:50) at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Exception: java.security.AccessControlException: access denied (java.util.logging.LoggingPermission control) The relevant lines in MyApplet are: final LogManager lm = LogManager.getLogManager(); final String s = "handlers=java.util.logging.ConsoleHandler"; final InputStream is = new java.io.ByteArrayInputStream(s.getBytes()); try { lm.readConfiguration(is); } catch (final IOException ioe) { System.err.println(ioe); } The exception is generated when the readConfiguration() is called. This same code works fine in an application. Does Java logging work within applets? How do I get around this exception? -- And loving it, -Qu0ll (Rare, not extinct) _________________________________________________ Qu0llSixFour(a)gmail.com [Replace the "SixFour" with numbers to email me]
From: Dave Miller on 15 Dec 2008 09:28 Qu0ll wrote: > I am trying to configure the built-in Java logging within an applet > using 6u11 but I encounter the following: > > java.security.AccessControlException: access denied > (java.util.logging.LoggingPermission control) > at java.security.AccessControlContext.checkPermission(Unknown Source) > at java.security.AccessController.checkPermission(Unknown Source) > at java.lang.SecurityManager.checkPermission(Unknown Source) > at java.util.logging.LogManager.checkAccess(Unknown Source) > at java.util.logging.LogManager.readConfiguration(Unknown Source) > at com.test.MyApplet.init(MyApplet.java:50) > at > sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown > Source) > at java.lang.Thread.run(Unknown Source) > Exception: java.security.AccessControlException: access denied > (java.util.logging.LoggingPermission control) > > The relevant lines in MyApplet are: > > final LogManager lm = LogManager.getLogManager(); > final String s = "handlers=java.util.logging.ConsoleHandler"; > final InputStream is = new > java.io.ByteArrayInputStream(s.getBytes()); > try { > lm.readConfiguration(is); > } catch (final IOException ioe) { > System.err.println(ioe); > } > > The exception is generated when the readConfiguration() is called. This > same code works fine in an application. > > Does Java logging work within applets? How do I get around this exception? > The applet is running within the JRE on the client computer. In the unlikely event that you want to print to a log file on the client you would need to sign your applet to give it file access permissions. (java.security.AccessControlException: access denied ) If you want your applet to log to the server, you would need to "phone home" and capture the output there. -- Dave Miller Java Web Hosting http://www.cheap-jsp-hosting.com/
From: Qu0ll on 15 Dec 2008 12:43 "Dave Miller" <nonregistered(a)coldrain.net> wrote in message news:DQt1l.1990$7I6.542(a)nwrddc01.gnilink.net... > Qu0ll wrote: >> I am trying to configure the built-in Java logging within an applet using >> 6u11 but I encounter the following: >> >> java.security.AccessControlException: access denied >> (java.util.logging.LoggingPermission control) >> at java.security.AccessControlContext.checkPermission(Unknown Source) >> at java.security.AccessController.checkPermission(Unknown Source) >> at java.lang.SecurityManager.checkPermission(Unknown Source) >> at java.util.logging.LogManager.checkAccess(Unknown Source) >> at java.util.logging.LogManager.readConfiguration(Unknown Source) >> at com.test.MyApplet.init(MyApplet.java:50) >> at >> sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown >> Source) >> at java.lang.Thread.run(Unknown Source) >> Exception: java.security.AccessControlException: access denied >> (java.util.logging.LoggingPermission control) >> >> The relevant lines in MyApplet are: >> >> final LogManager lm = LogManager.getLogManager(); >> final String s = "handlers=java.util.logging.ConsoleHandler"; >> final InputStream is = new >> java.io.ByteArrayInputStream(s.getBytes()); >> try { >> lm.readConfiguration(is); >> } catch (final IOException ioe) { >> System.err.println(ioe); >> } >> >> The exception is generated when the readConfiguration() is called. This >> same code works fine in an application. >> >> Does Java logging work within applets? How do I get around this >> exception? >> > > The applet is running within the JRE on the client computer. In the > unlikely event that you want to print to a log file on the client you > would need to sign your applet to give it file access permissions. > (java.security.AccessControlException: access denied ) > > If you want your applet to log to the server, you would need to "phone > home" and capture the output there. All I want is to be able to log to the Java console and I thought ConsoleHandler would do just that. Are you saying that Java logging can't even do that within an applet? -- And loving it, -Qu0ll (Rare, not extinct) _________________________________________________ Qu0llSixFour(a)gmail.com [Replace the "SixFour" with numbers to email me]
From: Daniel Pitts on 15 Dec 2008 14:17 Qu0ll wrote: > "Dave Miller" <nonregistered(a)coldrain.net> wrote in message > news:DQt1l.1990$7I6.542(a)nwrddc01.gnilink.net... >> Qu0ll wrote: >>> I am trying to configure the built-in Java logging within an applet >>> using 6u11 but I encounter the following: >>> >>> java.security.AccessControlException: access denied >>> (java.util.logging.LoggingPermission control) >>> at java.security.AccessControlContext.checkPermission(Unknown >>> Source) >>> at java.security.AccessController.checkPermission(Unknown Source) >>> at java.lang.SecurityManager.checkPermission(Unknown Source) >>> at java.util.logging.LogManager.checkAccess(Unknown Source) >>> at java.util.logging.LogManager.readConfiguration(Unknown Source) >>> at com.test.MyApplet.init(MyApplet.java:50) >>> at >>> sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown >>> Source) >>> at java.lang.Thread.run(Unknown Source) >>> Exception: java.security.AccessControlException: access denied >>> (java.util.logging.LoggingPermission control) >>> >>> The relevant lines in MyApplet are: >>> >>> final LogManager lm = LogManager.getLogManager(); >>> final String s = "handlers=java.util.logging.ConsoleHandler"; >>> final InputStream is = new >>> java.io.ByteArrayInputStream(s.getBytes()); >>> try { >>> lm.readConfiguration(is); >>> } catch (final IOException ioe) { >>> System.err.println(ioe); >>> } >>> >>> The exception is generated when the readConfiguration() is called. >>> This same code works fine in an application. >>> >>> Does Java logging work within applets? How do I get around this >>> exception? >>> >> >> The applet is running within the JRE on the client computer. In the >> unlikely event that you want to print to a log file on the client you >> would need to sign your applet to give it file access permissions. >> (java.security.AccessControlException: access denied ) >> >> If you want your applet to log to the server, you would need to "phone >> home" and capture the output there. > > All I want is to be able to log to the Java console and I thought > ConsoleHandler would do just that. Are you saying that Java logging > can't even do that within an applet? > It can if you sign your applet. It's not actually that hard of a process to do. I used to be afraid of it, but I found many helpful pages by using Google. -- Daniel Pitts' Tech Blog: <http://virtualinfinity.net/wordpress/>
From: Andrew Thompson on 15 Dec 2008 16:50
On Dec 16, 4:43 am, "Qu0ll" <Qu0llSixF...(a)gmail.com> wrote: .... > All I want is to be able to log to the Java console and I thought > ConsoleHandler would do just that. Are you saying that Java logging can't > even do that within an applet? Try an anonymous logger. They should work in sandboxed applets. -- Andrew Thompson http://pscode.org/ |