[infinispan-dev] How to get key ID passivated into DB
Galder Zamarreño
galder at redhat.com
Tue Aug 13 02:33:28 EDT 2013
On Aug 9, 2013, at 4:58 PM, Mircea Markus <mmarkus at redhat.com> wrote:
> +1, I think this is a bug. the active Equivalence implementation should be used there.
> Can you please create a JIRA for this?
And assign it to me, thanks! :)
>
> On 9 Aug 2013, at 14:57, Vitalii Chepeliuk <vchepeli at redhat.com> wrote:
>
>> Hi all! I have a question about entry passivation into DB, concretly this class LockSupportCacheStore and method store
>> @Override
>> public final void store(InternalCacheEntry ed) throws CacheLoaderException {
>> if (trace) {
>> log.tracef("store(%s)", ed);
>> }
>> if (ed == null) {
>> return;
>> }
>> if (ed.canExpire() && ed.isExpired(timeService.wallClockTime())) {
>> if (containsKey(ed.getKey())) {
>> if (trace) {
>> log.tracef("Entry %s is expired! Removing!", ed);
>> }
>> remove(ed.getKey());
>> } else {
>> if (trace) {
>> log.tracef("Entry %s is expired! Not doing anything.", ed);
>> }
>> }
>> return;
>> }
>>
>> L keyHashCode = getLockFromKey(ed.getKey()); <<< here key is generated like ed.getKey().hashCode() & 0xfffffc00;
>> lockForWriting(keyHashCode);
>> try {
>> storeLockSafe(ed, keyHashCode); <<< here it should be stored into Bucket and then stored in DB
>> } finally {
>> unlock(keyHashCode);
>> }
>> if (trace) {
>> log.tracef("exit store(%s)", ed);
>> }
>> }
>> When I use RemoteCacheManager and RemoteCache I am putting entries into cache
>> cache.put("key1", "v1");
>> cache.put("key2", "v2");
>> cache.put("key3", "v3");
>> Then 2 entries are passivated and stored in DB
>> ID DATA VERSION
>> 183713792 0301fe032a01034c422b21033e286d7942657374506572736f6e616c4b657957686963684861734e657665724265656e426574746572420521033e02763203620003630000000000000002 -1
>> 23486464 0301fe032a01034c420721033e046b657931420521033e02763103620003630000000000000001 -1
>> IDs are generated from method above and
>> byte[] keyBytes = marshaller.objectToByteBuffer(key, 64); <<< data are marshalled
>> long keyID = ByteArrayEquivalence.INSTANCE.hashCode(keyBytes) & 0xfffffc00 //computation taken from BucketBasedCacheStore << this does not work for me
>> And next step I'd like to retrieve data from DB
>> SELECT ID, DATA FROM JDBC_BINARY_DEFAULT WHERE ID=keyID
>> But in method
>> @Override
>> public Integer getLockFromKey(Object key) {
>> return key.hashCode() & 0xfffffc00; <<< here should be used Arrays.hashCode((byte[])key) & 0xfffffc00), if key is represented as byte array, or Used ByteArrayEquivalence instead of simple byte array(byte[]) as argument
>
> Cheers,
> --
> Mircea Markus
> Infinispan lead (www.infinispan.org)
>
>
>
>
>
> _______________________________________________
> infinispan-dev mailing list
> infinispan-dev at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/infinispan-dev
--
Galder Zamarreño
galder at redhat.com
twitter.com/galderz
Project Lead, Escalante
http://escalante.io
Engineer, Infinispan
http://infinispan.org
More information about the infinispan-dev
mailing list