Created
December 8, 2018 07:11
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| package org.redquark.kickstarter.threads; | |
| public class DeadlockResoultion { | |
| public static void main(String[] args) { | |
| DeadlockResoultion deadlockImplementation = new DeadlockResoultion(); | |
| final A a = deadlockImplementation.new A(); | |
| final B b = deadlockImplementation.new B(); | |
| // Thread-1 | |
| Runnable runnableA = () -> { | |
| synchronized (a){ | |
| try{ | |
| System.out.println(a.getI()); | |
| // Delay is introduced so that both threads can try to lock resources | |
| Thread.sleep(100); | |
| // Thread-1 has A but needs B also | |
| synchronized (b){ | |
| System.out.println("Acquiring resource B from Thread-1: " + b.getI()); | |
| } | |
| } catch (InterruptedException e){ | |
| e.printStackTrace(); | |
| } | |
| } | |
| }; | |
| // Thread-2 | |
| Runnable runnableB = () -> { | |
| synchronized (b){ | |
| // Thread-2 had B but needs A also | |
| synchronized (a){ | |
| System.out.println("Acquiring resource A from Thread-2: " + a.getI()); | |
| } | |
| } | |
| }; | |
| Runnable runnableC = () -> { | |
| synchronized (a){ | |
| synchronized (b){ | |
| System.out.println("Acquiring resource B from Thread-3: " + a.getI()); | |
| } | |
| } | |
| }; | |
| // Starting both threads | |
| new Thread(runnableA).start(); | |
| //new Thread(runnableB).start(); | |
| new Thread(runnableC).start(); | |
| } | |
| // Resource A | |
| private class A { | |
| private int i = 10; | |
| public int getI(){ | |
| return i; | |
| } | |
| } | |
| // Resource B | |
| private class B { | |
| private int i = 20; | |
| public int getI(){ | |
| return i; | |
| } | |
| } | |
| } |
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