edu.umass.cs.msocket.proxy.console.commands.ListGuids.java Source code

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Here is the source code for edu.umass.cs.msocket.proxy.console.commands.ListGuids.java

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/*******************************************************************************
 *
 * Mobility First - mSocket library
 * Copyright (C) 2013, 2014 - University of Massachusetts Amherst
 * Contact: arun@cs.umass.edu
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 *  
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License. 
 *
 * Initial developer(s): Arun Venkataramani, Aditya Yadav, Emmanuel Cecchet.
 * Contributor(s): ______________________.
 *
 *******************************************************************************/

package edu.umass.cs.msocket.proxy.console.commands;

import org.json.JSONArray;

import edu.umass.cs.gns.client.UniversalGnsClient;
import edu.umass.cs.msocket.common.GnsConstants;
import edu.umass.cs.msocket.proxy.console.ConsoleModule;

/**
 * Command that list GUIDs in a list
 * 
 * @author <a href="mailto:cecchet@cs.umass.edu">Emmanuel Cecchet </a>
 * @version 1.0
 */
public class ListGuids extends ConsoleCommand {

    /**
     * Creates a new <code>ListGuids</code> object
     * 
     * @param module
     */
    public ListGuids(ConsoleModule module) {
        super(module);
    }

    @Override
    public String getCommandDescription() {
        return "Gives the current list of GUIDs in list_name (current valid lists are\n"
                + "   Proxy related lists: ACTIVE_PROXY,INACTIVE_PROXY,SUSPICIOUS_PROXY\n"
                + "   Watchdog service related lists: ACTIVE_WATCHDOG,INACTIVE_WATCHDOG,SUSPICIOUS_WATCHDOG\n"
                + "   Location service related lists: ACTIVE_LOCATION,INACTIVE_LOCATION,SUSPICIOUS_LOCATION.";
    }

    @Override
    public String getCommandName() {
        return "list_guids";
    }

    @Override
    public String getCommandParameters() {
        return "list_name";
    }

    /**
     * Override execute to check for existing connectivity
     */
    public void execute(String commandText) throws Exception {
        if (module.getProxyGroupGuid() == null) {
            console.printString("You have to connect to a proxy group first.\n");
            return;
        }
        super.execute(commandText);
    }

    @Override
    public void parse(String commandText) throws Exception {
        try {
            String listName = commandText.trim();
            UniversalGnsClient gnsClient = module.getGnsClient();
            JSONArray proxies;

            if (GnsConstants.isValidList(listName)) {
                proxies = gnsClient.fieldRead(module.getProxyGroupGuid().getGuid(), listName,
                        module.getProxyGroupGuid());
            } else {
                console.printString("List " + listName + " is invalid\n");
                return;
            }

            console.printString("List of GUIDs in " + listName + ": \n");
            console.printString(proxies.toString(2));
            console.printNewline();
        } catch (Exception e) {
            console.printString("Failed to access GNS ( " + e + ")\n");
        }
    }
}