如何从Java代码（JSP/Servlet）中阻止另一个tomcat

Question

我安装了两个tomcats，如下所示：

1. Tomcat-A{Path:C:\Tomcata,Ports:Connector port=“8080”redirectport=“8443”关闭端口为-1}
2. tomcat-b{Path:c:\tomcatb,Ports:Connector port=“8090”redirectport=“8444”将端口关闭为8015}

我有一个运行在Tomcat-A上的JSP/Servlet应用程序。我的要求是关闭Tomcat-B并删除/取消部署托管在Tomcat-B上的应用程序。下面是我的Java代码。

private void StopTomcat() throws Exception {
    if(logger.isDebugEnabled()) logger.debug("StopTomcat");

    try {

        if (logger.isTraceEnabled())logger.trace("Shutting down tomcat: ");

        String Directory = "C:\TomcatB\bin\";

        Process process = Runtime.getRuntime().exec(Directory + "shutdown.bat");

        if (logger.isTraceEnabled())logger.trace("Executed shutdown.bat at " + Directory );
        
        BufferedReader stdInput = new BufferedReader(new InputStreamReader(process.getInputStream()));
        BufferedReader stdError = new BufferedReader(new InputStreamReader(process.getErrorStream()));

        if (logger.isTraceEnabled())logger.trace("Printing shutdown process logs" );
        String s = null;
        while ((s = stdInput.readLine()) != null) {
            if (logger.isTraceEnabled())
                logger.trace(s);
        }
        String Error = "";
        while ((s = stdError.readLine()) != null) {
            Error = Error + s;
        }

        if (!Error.equals("")) {
            logger.error(Error);
            throw new Exception("Tomcat Shutdown Failed with error: " + Error);
        }
        
    } catch (Exception e) {
        e.printStackTrace();
        logger.error( Arrays.toString( e.getStackTrace() ));
        throw new Exception(e.getMessage());
    }
}

在我得到的记录中：

2020-08-04 21:11:00 TRACE MigrateApp:55 - Executed shutdown.bat at C:\TomcatB\bin\
2020-08-04 21:11:00 TRACE MigrateApp:60 - Printing shutdown process logs
2020-08-04 21:11:00 TRACE MigrateApp:64 - Using CATALINA_BASE:   "TomcatA"
2020-08-04 21:11:00 TRACE MigrateApp:64 - Using CATALINA_HOME:   "TomcatA"
2020-08-04 21:11:00 TRACE MigrateApp:64 - Using CATALINA_TMPDIR: "TomcatA\temp"
2020-08-04 21:11:00 TRACE MigrateApp:64 - Using JRE_HOME:        "C:\Program Files\Java\jre1.8.0_251"
2020-08-04 21:11:00 TRACE MigrateApp:64 - Using CLASSPATH:       "TomcatA\bin\bootstrap.jar;TomcatA\bin\tomcat-juli.jar"
2020-08-04 21:11:00 ERROR MigrateApp:72 - 04-Aug-2020 21:11:00.668 SEVERE [main] org.apache.catalina.startup.Catalina.stopServer No shutdown port configured. Shut down server through OS signal. Server not shut down.
2020-08-04 21:11:00 ERROR MigrateApp:78 - [sailpoint.support.applicationdeployer.util.MigrateApp.StopTomcat(MigrateApp.java:73), sailpoint.support.applicationdeployer.util.MigrateApp.run(MigrateApp.java:36)]
2020-08-04 21:11:00 ERROR MigrateApp:79 - Tomcat Shutdown Failed with error: 04-Aug-2020 21:11:00.668 SEVERE [main] org.apache.catalina.startup.Catalina.stopServer No shutdown port configured. Shut down server through OS signal. Server not shut down.
2020-08-04 21:11:00 ERROR MigrateApp:39 - Tomcat Shutdown Failed with error: 04-Aug-2020 21:11:00.668 SEVERE [main] org.apache.catalina.startup.Catalina.stopServer No shutdown port configured. Shut down server through OS signal. Server not shut down.

我不明白为什么我的代码试图关闭Tomcat-A。有谁能帮我做同样的事吗。

Answer 1

如果您没有从默认值编辑Tomcat Bshutdown.bat脚本，您将看到c:\tomcatb\bin\shutdown.bat确定CATALINA_HOME并执行：

%CATALINA_HOME%\bin\catalina.bat

看起来您的TomcatA VM将自己的CATALINA_HOME传递给Tomcat Bshutdown.bat，它覆盖了C:\tomcatb\bin使用的默认值。您可以创建一个不采用CATALINA_HOME环境变量的新脚本shutdown2.bat，或者切换到processbuilder并在processbuilder启动命令中设置CATALINA_HOME如下所示：

File exe = new File(Directory, "shutdown.bat");
String [] cmd = new String[] { exe.getAbsolutePath() };
ProcessBuilder pb = new ProcessBuilder(cmd);
pb.environment().put("CATALINA_HOME", exe.getParentFile().getParentFile().getAbsolutePath());
Process process = pb.start();

如果进程锁定，您可能需要使用后台线程中的输出/错误流，或者通过调用before start（）将它们重定向到文件：

pb.redirectOutput(outfile);
pb.redirectError(errfile);