| 1 | package net.spy.memcached.ops; |
| 2 | |
| 3 | /** |
| 4 | * An operation callback that will capture receivedStatus and complete |
| 5 | * invocations and dispatch to a single callback. |
| 6 | * |
| 7 | * <p> |
| 8 | * This is useful for the cases where a single request gets split into |
| 9 | * multiple requests and the callback needs to not know the difference. |
| 10 | * </p> |
| 11 | */ |
| 12 | public abstract class MultiOperationCallback implements OperationCallback { |
| 13 | |
| 14 | private OperationStatus mostRecentStatus = null; |
| 15 | private int remaining=0; |
| 16 | protected final OperationCallback originalCallback; |
| 17 | |
| 18 | /** |
| 19 | * Get a MultiOperationCallback over the given callback for the specified |
| 20 | * number of replicates. |
| 21 | * |
| 22 | * @param original the original callback |
| 23 | * @param todo how many complete() calls we expect before dispatching. |
| 24 | */ |
| 25 | public MultiOperationCallback(OperationCallback original, int todo) { |
| 26 | originalCallback = original; |
| 27 | remaining = todo; |
| 28 | } |
| 29 | |
| 30 | public void complete() { |
| 31 | if(--remaining == 0) { |
| 32 | originalCallback.receivedStatus(mostRecentStatus); |
| 33 | originalCallback.complete(); |
| 34 | } |
| 35 | } |
| 36 | |
| 37 | public void receivedStatus(OperationStatus status) { |
| 38 | mostRecentStatus = status; |
| 39 | } |
| 40 | |
| 41 | } |