Examples of org.apache.karaf.shell.api.action.Action

org.apache.karaf.shell.api.action.Action

An action is the default implementation of the commands in karaf. In OSGi, Actions are discovered using an extender and a new instance of the class is created when the command is invoked, so that the implementation does not need to be thread safe. Before the call to the execute method the action is checked for fields annotated with @Reference and injected with services coming from the SessionFactory's Registry or from the OSGi registry. Methods annotated with @Init are then called. The next step is to inject command line parameters into fields annotated with @Option and @Argument and then call the execute method. Any class implementing Action must have a no argument constructor. This is necessary so the help generator can instantiate the class and get the default values. In order to make commands available from the non-OSGi shell, the commands must be listed in a file available at META-INF/services/org/apache/karaf/shell/commmands. @see org.apache.karaf.shell.api.action.Command @see org.apache.karaf.shell.api.action.lifecycle.Service

        return new DelayedCompleter(clazz);
    }


    @Override
    public Object execute(Session session, List<Object> arguments) throws Exception {
        Action action = createNewAction(session);
        try {
            if (new DefaultActionPreparator().prepare(action, session, arguments)) {
                return action.execute();
            }
        } finally {
            releaseAction(action);
        }
        return null;

            Map<String, Set<String>> commands = new TreeMap<String, Set<String>>();


            String commandSuffix = FORMAT_DOCBX.equals(format) ? "xml" : "conf"; 
            for (Class<?> clazz : classes) {
                try {
                    Action action = (Action) clazz.newInstance();
                    Command cmd = clazz.getAnnotation(Command.class);


                    // skip the *-help command
                    if (cmd.scope().equals("*")) continue;

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