使用继承的Groovy命令无法在Spring Boot远程Shell中编译

Question

我有一个抽象的groovy类，其中包含一些我想从其他groovy命令类（在Spring Boot的远程shell中使用）扩展的实用程序方法。 但是，当我尝试运行groovy命令类时，出现CommandException 。

我的常规抽象类如下所示。

package commands 
import com.xyz.MyService
import org.crsh.command.InvocationContext
import org.springframework.beans.factory.BeanFactory

abstract class abstractcmd {
    private static final String SPRING_FACTORY = "spring.beanfactory"

    protected MyService getMyService(InvocationContext context) {
        return getBeanFactory(context).getBean(MyService.class);
    }

    private BeanFactory getBeanFactory(InvocationContext context) {
        return context.attributes[SPRING_FACTORY];
    }
}

我的groovy命令类如下所示。

package commands
import org.crsh.cli.Command
import org.crsh.cli.Usage
import org.crsh.command.InvocationContext

@Usage("do something commands")
class foo extends abstractcmd {
    @Command
    @Usage("bar")
    def String bar(InvocationContext context) {
        try {
            getMyService(context).bar()
            return "did bar"
        } catch (Exception e) {
            return String.format("could not do bar: %s", e.toString())
        }
    }
}

当我SSH进入shell并执行foo bar ，出现以下异常。

org.crsh.shell.impl.command.spi.CommandException: Could not create command foo instance
    at org.crsh.lang.impl.groovy.GroovyCompiler$1.getCommand(GroovyCompiler.java:192) ~[crash.shell-1.3.2.jar:?]
    at org.crsh.lang.LanguageCommandResolver.resolveCommand(LanguageCommandResolver.java:101) ~[crash.shell-1.3.2.jar:?]
    at org.crsh.shell.impl.command.CRaSH.getCommand(CRaSH.java:100) ~[crash.shell-1.3.2.jar:?]
    at org.crsh.shell.impl.command.CRaSHSession.getCommand(CRaSHSession.java:96) ~[crash.shell-1.3.2.jar:?]
    at org.crsh.lang.impl.script.PipeLineFactory.create(PipeLineFactory.java:89) ~[crash.shell-1.3.2.jar:?]
    at org.crsh.lang.impl.script.ScriptRepl.eval(ScriptRepl.java:88) ~[crash.shell-1.3.2.jar:?]
    at org.crsh.shell.impl.command.CRaSHSession.createProcess(CRaSHSession.java:163) ~[crash.shell-1.3.2.jar:?]
    at org.crsh.shell.impl.async.AsyncProcess.execute(AsyncProcess.java:172) ~[crash.shell-1.3.2.jar:?]
    at org.crsh.console.Console.iterate(Console.java:219) ~[crash.shell-1.3.2.jar:?]
    at org.crsh.console.Console.on(Console.java:158) ~[crash.shell-1.3.2.jar:?]
    at org.crsh.console.Console.on(Console.java:135) ~[crash.shell-1.3.2.jar:?]
    at org.crsh.console.jline.JLineProcessor.run(JLineProcessor.java:204) ~[crash.shell-1.3.2.jar:?]
    at org.crsh.ssh.term.CRaSHCommand.run(CRaSHCommand.java:99) ~[crash.connectors.ssh-1.3.2.jar:?]
    at java.lang.Thread.run(Thread.java:745) [?:1.8.0_111]

如果我从abstractcmd和foo类中都删除了package commands行，那么IDE（IntelliJ）和shell都会抱怨找不到abstractcmd 。

2017-03-19 19:34:06 ERROR org.crsh.shell.impl.command.CRaSHProcess.execute:84 - Error while evaluating request 'foo' Could not compile command script foo
org.crsh.shell.impl.command.spi.CommandException: Could not compile command script foo
    at org.crsh.lang.impl.groovy.GroovyClassFactory.parse(GroovyClassFactory.java:65) ~[crash.shell-1.3.2.jar:?]
    at org.crsh.lang.impl.groovy.GroovyCompiler$1.getCommand(GroovyCompiler.java:172) ~[crash.shell-1.3.2.jar:?]
    at org.crsh.lang.LanguageCommandResolver.resolveCommand(LanguageCommandResolver.java:101) ~[crash.shell-1.3.2.jar:?]
    at org.crsh.shell.impl.command.CRaSH.getCommand(CRaSH.java:100) ~[crash.shell-1.3.2.jar:?]
    at org.crsh.shell.impl.command.CRaSHSession.getCommand(CRaSHSession.java:96) ~[crash.shell-1.3.2.jar:?]
    at org.crsh.lang.impl.script.PipeLineFactory.create(PipeLineFactory.java:89) ~[crash.shell-1.3.2.jar:?]
    at org.crsh.lang.impl.script.ScriptRepl.eval(ScriptRepl.java:88) ~[crash.shell-1.3.2.jar:?]
    at org.crsh.shell.impl.command.CRaSHSession.createProcess(CRaSHSession.java:163) ~[crash.shell-1.3.2.jar:?]
    at org.crsh.shell.impl.async.AsyncProcess.execute(AsyncProcess.java:172) ~[crash.shell-1.3.2.jar:?]
    at org.crsh.console.Console.iterate(Console.java:219) ~[crash.shell-1.3.2.jar:?]
    at org.crsh.console.Console.on(Console.java:158) ~[crash.shell-1.3.2.jar:?]
    at org.crsh.console.Console.on(Console.java:135) ~[crash.shell-1.3.2.jar:?]
    at org.crsh.console.jline.JLineProcessor.run(JLineProcessor.java:204) ~[crash.shell-1.3.2.jar:?]
    at org.crsh.ssh.term.CRaSHCommand.run(CRaSHCommand.java:99) ~[crash.connectors.ssh-1.3.2.jar:?]
    at java.lang.Thread.run(Thread.java:745) [?:1.8.0_111]
Caused by: org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
foo: 9: unable to resolve class abstractcmd 
 @ line 9, column 1.
   @Usage("bar")
   ^

1 error

    at org.codehaus.groovy.control.ErrorCollector.failIfErrors(ErrorCollector.java:310) ~[groovy-2.4.7.jar:2.4.7]
    at org.codehaus.groovy.control.CompilationUnit.applyToSourceUnits(CompilationUnit.java:946) ~[groovy-2.4.7.jar:2.4.7]
    at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:593) ~[groovy-2.4.7.jar:2.4.7]
    at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:542) ~[groovy-2.4.7.jar:2.4.7]
    at groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:298) ~[groovy-2.4.7.jar:2.4.7]
    at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:268) ~[groovy-2.4.7.jar:2.4.7]
    at org.crsh.lang.impl.groovy.GroovyClassFactory.parse(GroovyClassFactory.java:59) ~[crash.shell-1.3.2.jar:?]
    ... 14 more

我可以使自定义命令正常工作的唯一方法是不扩展abstractcmd （从而在命令类中实现“ util”方法）并删除package行。

我正在使用Spring Boot v1.5.1.RELEASE。

关于我在做什么错的任何想法吗？

Answer 1

看起来CRaSH的Groovy类在扩展其他Groovy类方面存在问题，因为如果您不扩展其中一个，它就可以正常工作。

很抱歉，但是我没有时间去充分地研究如何以及为什么（更正/更新是值得欢迎的），并且在文档中没有找到任何东西，但是好消息是您可以扩展一个抽象的Java类来实现一样的东西。 我偶然发现了cron命令的示例，该示例使用以下javadoc扩展了GroovyCommand抽象类：

/**
 * The base command for Groovy class based commands.
 */
public abstract class GroovyCommand extends BaseCommand implements GroovyObject

因此，总而言之，您可以使用以下解决方法：

抽象SpringAwareCommand Java类

package crash.commands;

import org.crsh.command.BaseCommand;
import org.springframework.beans.factory.BeanFactory;

public abstract class SpringAwareCommand extends BaseCommand {

    private static final String SPRING_BEAN_FACTORY = "spring.beanfactory";

    protected <T> T getBean(Class<T> beanClass) {
        return ((BeanFactory) this.context.getAttributes().get(SPRING_BEAN_FACTORY)).getBean(beanClass);
    }

}

更新了foo groovy类

package crash.commands

import com.xyz.MyService
import org.crsh.cli.Command
import org.crsh.cli.Usage

@Usage("do something commands")
class foo extends SpringAwareCommand {
    @Command
    @Usage("bar")
    def String bar() {
        try {
            getBean(MyService.class).bar()
            return "did bar"
        } catch (Exception e) {
            return String.format("could not do bar: %s", e.toString())
        }
    }
}