Stack Using Arraylist Lock Condition

Stack Using Arraylist Lock Condition 


  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
package stack_using_arraylist_lock_condition;

import java.util.ArrayList;
import java.util.Random;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author Mahi
 */
public class Stack_Using_ArrayList_lock_condition {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        
        StackArrayList stList = new StackArrayList();
        stList.push(10);
        stList.push(20);
        stList.push(30);
        stList.push(40);
        stList.push(50);
        stList.pop();
        
        //Implemeting with threads
        StackArrayList sa = new StackArrayList();
        Pusher t1 = new Pusher(sa);
        Pusher t2 = new Pusher(sa);
        Poper t3 = new Poper(sa);
                
        t1.start();
        t2.start();
        t3.start();
    }
    
}
class StackArrayList{
    public int top;
    public int maxSize = 10;
    public ArrayList<Integer> stackList;

    private final Lock myLock = new ReentrantLock();
    private final Condition isEmty__Condition = myLock.newCondition();
    private final Condition isFull__Condition = myLock.newCondition();

    public StackArrayList() {
        top = -1;
        stackList = new ArrayList<Integer>();
    }
   
    //Science this method is allready avalable
    //No need to implement.
    //So commented... lol
    /*
    public boolean isEmpty(){
        if(this.stackList.isEmpty()){
            return true;
        }else{
            return false;
        }
    }
    */
    public boolean isFull(){
        if(top == maxSize-1){
            return true;
        }else{
            return false;
        }
    }
    
    public void push(int val){
        myLock.lock();
        try {
            while(this.isFull()){
                System.out.println("Puser is waiting now... Array is full..");
                isFull__Condition.await();
            }
            top++;
            System.out.println("Item added...");
            stackList.add(val);
            isEmty__Condition.signalAll();

        } catch (InterruptedException ex) {
            Logger.getLogger(StackArrayList.class.getName()).log(Level.SEVERE, null, ex);
        }
        finally{
            myLock.unlock();
        }
        
    }
    
    public void pop(){
        myLock.lock();
        try {
            while(stackList.isEmpty()){
                System.out.println("Poper is wating... Stack is empty..");
                isEmty__Condition.await();
            }
            System.out.println("Pop item is : " + stackList.get(top));
            stackList.remove(top);
            top --;
            isFull__Condition.signalAll();
            
        } catch (InterruptedException ex) {
            Logger.getLogger(StackArrayList.class.getName()).log(Level.SEVERE, null, ex);
        }
        finally{
            myLock.unlock();
        }
    }
    
    public void dispyaFullArray(){
        for(int x: stackList){
            System.out.println("Item is : " + x);
        }
    }
}

class Poper extends Thread{
    StackArrayList sal;

    public Poper(StackArrayList sal) {
        this.sal = sal;
    }
    
    @Override
    public void run(){
    
        System.out.println("Poper start operation and poping like carazy...");
        for(int a=0; a<sal.maxSize-1; a++){
            //System.out.println("poping index of " + a );
            sal.pop();
        }
    }   
}

class Pusher extends Thread{
    StackArrayList sal;
    Random myRand = new Random();
    public Pusher(StackArrayList sal) {
        this.sal = sal;
    }
    
    @Override
    public void run(){
        System.out.println("Now the puser is pushing like carazy..");
        for(int a=0; a<sal.maxSize; a++){
            sal.push(myRand.nextInt());
        }
    }
}


EmoticonEmoticon

Subscribe to: Posts (Atom)