104 lines
2.5 KiB
Java
104 lines
2.5 KiB
Java
|
/**
|
|||
|
* Copyright (C) 2007 - 2016 52°North Initiative for Geospatial Open Source
|
|||
|
* Software GmbH
|
|||
|
*
|
|||
|
* This program is free software; you can redistribute it and/or modify it
|
|||
|
* under the terms of the GNU General Public License version 2 as published
|
|||
|
* by the Free Software Foundation.
|
|||
|
*
|
|||
|
* If the program is linked with libraries which are licensed under one of
|
|||
|
* the following licenses, the combination of the program with the linked
|
|||
|
* library is not considered a "derivative work" of the program:
|
|||
|
*
|
|||
|
* • Apache License, version 2.0
|
|||
|
* • Apache Software License, version 1.0
|
|||
|
* • GNU Lesser General Public License, version 3
|
|||
|
* • Mozilla Public License, versions 1.0, 1.1 and 2.0
|
|||
|
* • Common Development and Distribution License (CDDL), version 1.0
|
|||
|
*
|
|||
|
* Therefore the distribution of the program linked with libraries licensed
|
|||
|
* under the aforementioned licenses, is permitted by the copyright holders
|
|||
|
* if the distribution is compliant with both the GNU General Public
|
|||
|
* License version 2 and the aforementioned licenses.
|
|||
|
*
|
|||
|
* This program is distributed in the hope that it will be useful, but
|
|||
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
|
|||
|
* Public License for more details.
|
|||
|
*/
|
|||
|
package org.n52.wps.server;
|
|||
|
|
|||
|
import java.util.ArrayList;
|
|||
|
|
|||
|
|
|||
|
/**
|
|||
|
* @author Matthias Mueller, TU Dresden
|
|||
|
*
|
|||
|
*/
|
|||
|
public class ProcessIDRegistry {
|
|||
|
|
|||
|
private static ProcessIDRegistry instance = new ProcessIDRegistry();
|
|||
|
private volatile boolean lock = false;
|
|||
|
private static ArrayList<String> idList = new ArrayList<String>();
|
|||
|
|
|||
|
private ProcessIDRegistry(){
|
|||
|
//empty private constructor
|
|||
|
}
|
|||
|
|
|||
|
public static ProcessIDRegistry getInstance(){
|
|||
|
return instance;
|
|||
|
}
|
|||
|
|
|||
|
public boolean addID(String id){
|
|||
|
while (lock){
|
|||
|
//spin
|
|||
|
}
|
|||
|
try{
|
|||
|
lock = true;
|
|||
|
boolean retval = idList.add(id);
|
|||
|
lock = false;
|
|||
|
return retval;
|
|||
|
}
|
|||
|
finally{
|
|||
|
lock = false;
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
public synchronized boolean removeID(String id){
|
|||
|
while (lock){
|
|||
|
//spin
|
|||
|
}
|
|||
|
try{
|
|||
|
lock = true;
|
|||
|
boolean retval = idList.remove(id);
|
|||
|
lock = false;
|
|||
|
return retval;
|
|||
|
}
|
|||
|
finally{
|
|||
|
lock = false;
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
public boolean containsID(String id){
|
|||
|
return idList.contains(id);
|
|||
|
}
|
|||
|
|
|||
|
public String[] getIDs(){
|
|||
|
return idList.toArray(new String[idList.size()]);
|
|||
|
}
|
|||
|
|
|||
|
protected void clearRegistry(){
|
|||
|
while (lock){
|
|||
|
//spin
|
|||
|
}
|
|||
|
try{
|
|||
|
lock = true;
|
|||
|
idList.clear();
|
|||
|
lock = false;
|
|||
|
}
|
|||
|
finally{
|
|||
|
lock = false;
|
|||
|
}
|
|||
|
}
|
|||
|
}
|