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/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*
*/
package org.apache.qpid.commands;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Iterator;
import java.util.Set;
import java.util.StringTokenizer;
import javax.management.MBeanServerConnection;
import javax.management.ObjectName;
import org.apache.qpid.commands.objects.QueueObject;
import org.apache.qpid.utils.JMXinfo;
public class Commanddelete extends CommandImpl
{
private int number = 0;
private QueueObject objname;
private MBeanServerConnection mbsc;
private String method1, method2;
private ObjectName queue;
public static final String COMMAND_NAME = "delete";
public Commanddelete(JMXinfo info)
{
super(info);
this.mbsc = info.getmbserverconnector();
this.objname = new QueueObject(mbsc);
this.method1 = "deleteMessageFromTop";
this.method2 = "clearQueue";
}
public void deletemessages()
{
Set set = null;
objname.setQueryString(this.getObject(), this.getName(), this.getVirtualhost());
set = objname.returnObjects();
if (objname.getSet().size() != 0)
{
Iterator it = set.iterator();
this.queue = (ObjectName) it.next();
try
{
if (this.number == 0)
{
echo("");
System.out.print("Do you want to delete all the messages from the Queue [Y/N] :");
InputStreamReader isr = new InputStreamReader(System.in);
BufferedReader br = new BufferedReader(isr);
String s = br.readLine();
echo(s);
if (s.compareToIgnoreCase("y") == 0)
this.mbsc.invoke(queue, this.method2, null, null);
else
return;
}
else if (objname.getmessagecount(this.queue) < this.number)
{
echo("Given number is Greater than the Queue Depth");
return;
}
else
{
for (int i = 0; i < this.number; i++)
{
this.mbsc.invoke(queue, this.method1, null, null);
}
}
}
catch (Exception ex)
{
ex.printStackTrace();
}
}
else
{
if (hasName())
{
echo("The Queue you have specified is not in the current broker");
echo("");
}
else
{
printusage();
}
}
}
public void execute()
{
/*
* In here you it's easy to handle any number of otpions which are going
* to add with the list command which works with main option object or o
*/
if (checkoptionsetting("object") || checkoptionsetting("o"))
{
String object = optionchecker("object");
if (object == null)
{
object = optionchecker("o");
}
if (object.compareToIgnoreCase("queue") == 0)
setObject(object);
else
{
unrecognizeoption();
echo("This command is only applicable for delete command so please start with queue");
}
if (checkoptionsetting("name") || checkoptionsetting("n"))
{
String name = optionchecker("name");
if (name == null)
name = optionchecker("n");
setName(name);
}
if (checkoptionsetting("virtualhost") || checkoptionsetting("v"))
{
String vhost = optionchecker("virtualhost");
if (vhost == null)
vhost = optionchecker("v");
setVirtualhost(vhost);
}
if (checkoptionsetting("top") || checkoptionsetting("t"))
{
String number = optionchecker("top");
if (number == null)
number = optionchecker("t");
setnumber(removeSpaces(number));
}
this.deletemessages();
}
else if (checkoptionsetting("h") || checkoptionsetting("help"))
printusage();
else
unrecognizeoption();
}
public void printusage()
{
echo("");
echo("Usage:delete [OPTION] ... [OBJECT TYPE]...\n");
echo("Delete the top most messages from the given queue object\n");
echo("To specify the desired queue you have to give the virtualhost name and the queue name with following commands\n");
echo("Where possible options include:\n");
echo(" -v --virtualhost Give the virtuallhost name of the desired queue");
echo(" -n --name Give the queue name of the desired queue you want to do the delete operation");
echo(" -t --top Give how many number of messages you want to delete from the top (Default = all the messages will be deleted");
echo(" -h --help Display the help and back to the qpid-cli prompt\n");
}
private void setnumber(String number)
{
Integer i = new Integer(number);
this.number = i.intValue();
}
public int getnumber()
{
return this.number;
}
private static String removeSpaces(String s)
{
StringTokenizer st = new StringTokenizer(s, " ", false);
String t = "";
while (st.hasMoreElements())
t += st.nextElement();
return t;
}
}
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