| 1 | package com.hammurapi.common; |
| 2 | |
| 3 | import java.util.concurrent.locks.Lock; |
| 4 | import java.util.concurrent.locks.ReentrantLock; |
| 5 | |
| 6 | /** |
| 7 | * LocalJoiner uses java.util.concurrent.locks.ReentrantLock to protect simultaneous access |
| 8 | * to input collectors. |
| 9 | * @author Pavel Vlasov |
| 10 | * |
| 11 | * @param <T> |
| 12 | * @param <C> |
| 13 | * @param <R> |
| 14 | */ |
| 15 | public abstract class LocalJoiner<T, C, R> extends Joiner<T, C, R> { |
| 16 | |
| 17 | Lock lock = new ReentrantLock(); |
| 18 | |
| 19 | protected LocalJoiner( |
| 20 | Collector<T>[] inputCollectors, |
| 21 | Class<T> inputType, |
| 22 | boolean outerJoin) { |
| 23 | super(inputCollectors, inputType, outerJoin); |
| 24 | } |
| 25 | |
| 26 | @Override |
| 27 | protected void startJoin() { |
| 28 | lock.lock(); |
| 29 | } |
| 30 | |
| 31 | @Override |
| 32 | protected void endJoin() { |
| 33 | lock.unlock(); |
| 34 | } |
| 35 | |
| 36 | } |