grails 中的资源插件在文件删除时出错？

Question

我在 Grails 上使用 Groovy 并且配置了资源插件。 我有这种情况：

• 我有一个产品，它有多个图像。

• 管理员可以删除任何图片。

逻辑是，当管理员单击“删除”时，我会从文件系统中删除文件（及其拇指文件）。

整个过程运行顺利，但是过了一段时间（5-6分钟），当resources插件再次刷新它的资源时，它会抛出一个错误说，“some module depends on resource [path/to/file]但找不到文件”。

堆栈跟踪如下：

2012-08-10 12:49:41,159 [http-8080-2] ERROR errors.GrailsExceptionResolver  - Exception occurred when processing request: [GET] /
Stacktrace follows:
org.codehaus.groovy.grails.web.taglib.exceptions.GrailsTagException: Error executing tag <r:layoutResources>: Module [__@adhoc-files@__] depends on resource [/images/product/p312roduct/original/Candle_4.jpg] but the file cannot be found at /home/desktop2/finalWorkspace3/ds/grails-app/views/layouts/main.gsp:13
    at home_desktop2_finalWorkspace3_ds_grails_app_views_layouts_main_gsp$_run_closure1.doCall(main.gsp:13)
    at home_desktop2_finalWorkspace3_ds_grails_app_views_layouts_main_gsp$_run_closure1.doCall(main.gsp)
    at home_desktop2_finalWorkspace3_ds_grails_app_views_layouts_main_gsp.run(main.gsp:17)
    at org.grails.plugin.resource.DevModeSanityFilter.doFilter(DevModeSanityFilter.groovy:44)
    at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:197)
    at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:171)
    at java.lang.Thread.run(Thread.java:679)
Caused by: java.lang.IllegalArgumentException: Module [__@adhoc-files@__] depends on resource [/images/product/p312roduct/original/Candle_4.jpg] but the file cannot be found
    at org.grails.plugin.resource.ResourceTagLib$_closure8.doCall(ResourceTagLib.groovy:463)
    at org.grails.plugin.resource.ResourceTagLib.invokeMethod(ResourceTagLib.groovy)
    at org.grails.plugin.resource.ResourceTagLib$_closure6.doCall(ResourceTagLib.groovy:387)
    ... 7 more
2012-08-10 12:49:41,172 [http-8080-2] ERROR pages.GroovyPagesServlet  - Error processing GSP: Error executing tag <r:layoutResources>: Module [__@adhoc-files@__] depends on resource [/images/product/p312roduct/original/Candle_4.jpg] but the file cannot be found at /home/desktop2/finalWorkspace3/ds/grails-app/views/layouts/main.gsp:13
org.codehaus.groovy.grails.web.taglib.exceptions.GrailsTagException: Error executing tag <r:layoutResources>: Module [__@adhoc-files@__] depends on resource [/images/product/p312roduct/original/Candle_4.jpg] but the file cannot be found at /home/desktop2/finalWorkspace3/ds/grails-app/views/layouts/main.gsp:13
    at home_desktop2_finalWorkspace3_ds_grails_app_views_layouts_main_gsp$_run_closure1.doCall(main.gsp:13)
    at home_desktop2_finalWorkspace3_ds_grails_app_views_layouts_main_gsp$_run_closure1.doCall(main.gsp)
    at home_desktop2_finalWorkspace3_ds_grails_app_views_layouts_main_gsp.run(main.gsp:17)
    at org.grails.plugin.resource.DevModeSanityFilter.doFilter(DevModeSanityFilter.groovy:44)
    at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:197)
    at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:171)
    at java.lang.Thread.run(Thread.java:679)
Caused by: java.lang.IllegalArgumentException: Module [__@adhoc-files@__] depends on resource [/images/product/p312roduct/original/Candle_4.jpg] but the file cannot be found
    at org.grails.plugin.resource.ResourceTagLib$_closure8.doCall(ResourceTagLib.groovy:463)
    at org.grails.plugin.resource.ResourceTagLib.invokeMethod(ResourceTagLib.groovy)
    at org.grails.plugin.resource.ResourceTagLib$_closure6.doCall(ResourceTagLib.groovy:387)
    ... 7 more

Answer 1

资源插件期望模块中的底层文件不会改变。此外，应用程序直接链接的任何静态资产（而不是通过模块或 标签）都被视为ad-hoc，并作为模块添加到资源上下文中。这甚至允许资源插件对这些“遗留”资产进行缩小、编译、缓存等操作。

如果您使用文件系统来交付您的这些有些动态的资产，最好将它们排除在资源插件的临时处理之外。设置配置标志grails.resources.adhoc.excludes 以排除您存储这些资产的任何目录。