When updating entities in my cache, the oldValue=newValue in the event,
unless I do a put with the original object instance. This is of course not
always possible.
Here is a simplified example.
IgnitePredicate<CacheEvent> locLsnr = evt -> {
// do something
};
ignite.events().localListen(locLsnr,EventType.EVT_CACHE_OBJECT_PUT);
IgniteCache<TradeKey, Trade> cache = ignite.getOrCreateCache("MyCache");
Trade trade1 = new Trade();
trade1.setId(1);
trade1.setSize(10);
cache.put(new TradeKey(trade.getId()), trade1);
// event is generated
//evt.oldValue is null, no problem
trade1.setSize(20);
cache.put(new TradeKey(trade.getId()), trade1);
// event is generated
// evt.oldValue().getSize() is 10, evt.newValue().getSize() is 20, this is
GOOD
But, if I retrieve the trade from the cache again before updating (from
another part of the application for example), I am not able to see what the
old value was in the event. Old value will just show the new value.
IgnitePredicate<CacheEvent> locLsnr = evt -> {
// do something
};
ignite.events().localListen(locLsnr,EventType.EVT_CACHE_OBJECT_PUT);
IgniteCache<TradeKey, Trade> cache = ignite.getOrCreateCache("MyCache");
Trade trade1 = new Trade();
trade1.setId(1);
trade1.setSize(10);
cache.put(new TradeKey(trade.getId()), trade1);
// event is generated
//evt.oldValue is null, no problem
trade1 = cache.get(new TradeKey(1)); // or could be a query or any search on
the cache
trade1.setSize(20);
cache.put(new TradeKey(trade.getId()),trade1);
// event is generated
// evt.oldValue().getSize() is 20, evt.newValue().getSize() is 20, this is
BAD
Any advice? Thanks.
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