admintool.java

用Java写的面相对象的数据库管理系统

// You can redistribute this software and/or modify it under the terms of
// the Ozone Library License version 1 published by ozone-db.org.
//
// The original code and portions created by SMB are
// Copyright (C) 1997-2000 by SMB GmbH. All rights reserved.
//
// $Id: AdminTool.java,v 1.14 2000/10/28 16:55:20 daniela Exp $

package org.ozoneDB.tools;

import java.io.*;
import java.util.*;


/**
 * Main class for the AdminTool. This uses CommandExecute to communicate
 * with the server.
 */
class AdminTool implements IODevice {
    CommandExecute exec;
    BufferedReader input;
    IODevice device;
    
    
    public AdminTool( String host, int port ) {
        try {
            exec = new CommandExecute( this );
            exec.open( host, port );
            input = new BufferedReader( new InputStreamReader( System.in ) );
            message( "Connected to " + host + " at port " + port );
            device = this;
        } catch (IOException e) {
            System.out.println( "Unable to connect the server!" );
            System.exit( 0 );
        } 
    }
    
    
    public String[] question( String q ) {
        System.out.print( q );
        System.out.flush();
        
        //MEN 6/25/1999
        int iChar = 0;
        StringBuffer line = new StringBuffer( 128 );
        try {
            while ((iChar = System.in.read()) != '\n') {
                line.append( (char)iChar );
            } 
        } catch (IOException e) {
            System.out.println( "Error reading command: " + e );
        } 
        StringTokenizer st = new StringTokenizer( new String( line ).trim() );
        String[] com = new String[st.countTokens()];
        int i = 0;
        while (st.hasMoreTokens()) {
            com[i++] = st.nextToken();
        } 
        return com;
    } 
    
    
    public void message( String mess ) {
        System.out.println( mess );
    } 
    
    
    public void asyncMessage( String mess ) {
        System.out.println( mess );
    } 
    
    
    public boolean request( String req ) {
        String[] q = question( req );
        return q[0].equals( "y" );
    } 
    
    
    public void run() {
        String[] com;
        do {
            com = question( "ozoneAdmin > " );
        } while (exec.execute( com ));
        message( "Bye." );
    } 
    
    
    public void close() {
        try {
            exec.close();
        } catch (Exception e) {
        } 
    } 
    
    
    public static void main( String[] args ) {
        String hostname = "localhost";
        int port = 3000;
        boolean help = false;
        
        System.out.println( "ozone administration tool" );
        
        for (int i = 0; i < args.length; i++) {
            if (args[i].startsWith( "-host" )) {
                hostname = args[i].substring( 5 );
            } else if (args[i].startsWith( "-port" )) {
                port = Integer.parseInt( args[i].substring( 5 ) );
            } else if (args[i].startsWith( "-h" )) {
                help = true;
            } else {
                System.out.println( "unknown option:" + args[i] );
                help = true;
            } 
        } 
        
        if (help) {
            System.out.println( "\nusage: ozoneAdmin [-host<host>] [-port<number>] [-h]\n" );
            System.out.println( "-host<host>		the host to connect to" );
            System.out.println( "-port<number>		the port number to connect to the Ozone DB" );
            System.out.println( "-h			shows this help" );
            System.exit( 0 );
        } 
        
        AdminTool at = new AdminTool( hostname, port );
        at.run();
        System.exit( 0 );
    } 
}