Question

我在Tomme 7.0.32中嵌入了Flume Source。我遇到的问题是Flume在Classpath上放置了大量的东西，在启动时，Tomcat扫描类路径寻找TLD，由于水槽使用的通配符导致TLD问题。

信息：启动Servlet引擎：Apache Tomcat / 7.0.32 2012年11月5日上午8:21:08 org.apache.catalina.startup.TldConfig tldScanJar 警告：无法处理TLD文件的JAR [jar：file：/opt/mapr/hadoop/hadoop-0.20.2/hadoop*core*.jar！/] java.io.FileNotFoundException：/opt/mapr/hadoop/hadoop-0.20.2/hadoop*core*.jar（没有这样的文件或目录） at java.util.zip.ZipFile.open（Native Method）在java.util.zip.ZipFile。（ZipFile.java:214）在java.util.zip.ZipFile。（ZipFile.java:144）在java.util.jar.JarFile。（JarFile.java:152）在java.util.jar.JarFile。（JarFile.java:89）在sun.net.www.protocol.jar.URLJarFile。（URLJarFile.java:93）在sun.net.www.protocol.jar.URLJarFile.getJarFile（URLJarFile.java:69）在sun.net.www.protocol.jar.JarFileFactory.get（JarFileFactory.java:88）在sun.net.www.protocol.jar.JarURLConnection.connect（JarURLConnection.java:122）在sun.net.www.protocol.jar.JarURLConnection.getJarFile（JarURLConnection.java:89）在org.apache.tomcat.util.scan.FileUrlJar。（FileUrlJar.java:41）在org.apache.tomcat.util.scan.JarFactory.newInstance（JarFactory.java:34）在org.apache.catalina.startup.TldConfig.tldScanJar（TldConfig.java:487）在org.apache.catalina.startup.TldConfig.access $ 100（TldConfig.java:58）在org.apache.catalina.startup.TldConfig $ TldJarScannerCallback.scan（TldConfig.java:303） at org.apache.tomcat.util.scan.StandardJarScanner.process（StandardJarScanner.java:241）在org.apache.tomcat.util.scan.StandardJarScanner.scan（StandardJarScanner.java:204）在org.apache.catalina.startup.TldConfig.execute（TldConfig.java:277）

在我的代码中，我试图禁用此扫描，甚至尝试在我的上下文中将JarScanner设置为null。这没有用。以下是我的代码：

File docBase = new File(System.getProperty("java.io.tmpdir"));
    System.out.println("------- " + docBase.getAbsolutePath());

    String servletName = "1 source";

    Tomcat tomcat = new Tomcat();
    tomcat.setPort(8080);
    tomcat.setBaseDir(docBase.getAbsolutePath());

    Context context = tomcat.addContext("", docBase.getAbsolutePath());
    context.setIgnoreAnnotations(true);
    context.setJarScanner(null);

    Tomcat.addServlet(context, servletName, new HttpServlet() {

Answer 1

试试这个！ Context context = tomcat.addWebapp（“/ d”，“d：/”）; JarScanner jarScanner =新的JarScanner（） {

        @Override
        public void scan(ServletContext arg0, ClassLoader arg1,
                JarScannerCallback arg2, Set<String> arg3)
        {
            //do nothing
        }
    };
    context.setJarScanner(jarScanner);

Answer 2

Yo可以在tomcat.addWebapp（）之前禁用扫描类路径和清单：

ContextConfig contextConfig = new ContextConfig() {
            private boolean invoked = false;

            @Override
            public void lifecycleEvent(LifecycleEvent event) {
                if (!invoked) {
                    StandardJarScanner scanner = new StandardJarScanner();
                    scanner.setScanClassPath(false);
                    scanner.setScanManifest(false);
                    ((Context) event.getLifecycle()).setJarScanner(scanner);
                    invoked = true;
                }
                super.lifecycleEvent(event);
            }
        };
        Context ctx = tomcat.addWebapp(tomcat.getHost(), "/", "path/to/war", contextConfig);

Answer 3

其他两个答案不适用于Tomcat 8.5+。 addWebApp将contextconfig作为字符串。但是您可以使用下面的代码进行选择性扫描。请注意，如果在context.xml中定义了JarScanner，它将优先于代码。一旦调用tomcat.start（）

，JarScanFilter将被回调。

            Context context = tomcat.addWebapp("/"+sApp, location);
            //Keep in mind that this JarScanFilter will be overwritten by JarScanner that defined in META-INF\context.xml
            JarScanFilter jarScanFilter = new JarScanFilter() {

                @Override
                public boolean check(JarScanType jarScanType, String jarName) {

                    if(jarName.startsWith("spring")) {
                        System.out.println("JarScanType: "+ jarScanType +" JarName: "+ jarName + " Will Scan: true");
                        return true;
                    }
                    System.out.println("JarScanType: "+ jarScanType +" JarName: "+ jarName + " Will Scan: false");
                    return false;
                }
            };
            context.getJarScanner().setJarScanFilter(jarScanFilter);

嵌入式Tomcat 7.0.32启动jar扫描程序

3 个答案: