Hi,
On 2015-02-14, 11:59 PM, "OC" wrote:
On 15. 2. 2015, at 1:48, Chuck Hill
<[email protected]<mailto:[email protected]>> wrote:
===
private static Map _lastValidPOCacheGID=[:]
public DBPriceOffer lastValidPriceOffer { // this might happen in any EC,
default or temporary
if (_lastValidPOCacheGID[this.permanentGlobalID()]) {
def gid=_lastValidPOCacheGID[this.permanentGlobalID()]
def lvpo=this.editingContext().objectForGlobalID(gid) //1 finds it
if exists in EC, or...
Don’t do it like this. Use ec.faultForGlobalD(). This handles the three cases:
That was the first thing I tried, but with faultForGlobalD(), I
(a) get a fault instead of the object itself -- this is self-evidently wrong,
for the object has been added into the EC short time ago, and the documentation
says “If the object associated with globalID is already registered in this
EOEditingContext ... this method returns that object”
The fault is the EO, or should be.
public interface EOEnterpriseObject
extends Serializable, EOKeyValueCodingAdditions, EORelationshipManipulation,
EOValidation, EODeferredFaulting
EODeferredFaulting extends EOFaulting
If it is not in the EC, it will return true to isFault() but calling
willRead() will fire the fault, populating the data in the EC. If the object
was added to the EC, then it should be returned. If it is not, then something
in your app is very, very, very wrong. I am also starting to suspect this from
some of your other messages.
(b) as probably a direct result of (a), I keep getting
databaseContextFailedToFetchObject delegate calls when the fault is fired.
That is insane.
If I don't do anything and return false from the delegate method, I then get
the right object, but I feel something is wrong whenever
databaseContextFailedToFetchObject comes -- or is it the normal processing here?
Very not normal. It not even normal to try and fetch it if it has been added
to the EC already. It should only fetch if the snapshot is not there or the
timestamp on the snapshot is before the EC’s fetchTimestamp.
If so, how do I distinguish in my delegate method that „this is OK“ from the
cases where there's something really amiss?
When using e.g., this code:
=== if I use this code ===
def gid=DBAuction._lastValidPOCacheGID[this.permanentGlobalID()]
println "???? about to get $gid of $this
/EC:${this.editingContext().hashCode()}"
def
lvpo=this.editingContext().faultForGlobalID(gid,this.editingContext())
println "???? got ${lvpo.hashCode()} isfault: ${lvpo.isFault()}"
println "???? -> $lvpo"
===
and, just to repeat for reference,
===
DBPriceOffer npo=new DBPriceOffer()
this.editingContext.insertObject(npo)
println "???? setting new valid PO of ${this.permanentGlobalID()}: $npo ->
${npo.permanentGlobalID()} IN.this ${this.editingContext.hashCode()} IN.po
${npo.editingContext.hashCode()}"
===
along with
===
boolean databaseContextFailedToFetchObject(EODatabaseContext ctxt, Object
object, EOGlobalID gid) {
println "SPC: failed-to-fetch $gid ($object / ${object.getClass()}),
missing ${ctxt.missingObjectGlobalIDs()}"
false
}
===
for new price order I get this result:
===
???? setting new valid PO of _EOIntegralKeyGlobalID[DBAuction
(java.lang.Integer)1000015]: <DBPriceOffer@351793642 PK:null N /EC:1655327563>
-> _EOIntegralKeyGlobalID[DBPriceOffer (java.lang.Integer)1000275] IN.this
1655327563 IN.po 1655327563
...
???? about to get _EOIntegralKeyGlobalID[DBPriceOffer
(java.lang.Integer)1000275] of <DBAuction@422562876 PK:1000015 E:2 Title:'blah'
/EC:1655327563> /EC:1655327563
???? got 1165696376 isfault: true
08:18:48.470 DEBUG === Begin Internal Transaction
08:18:48.470 DEBUG evaluateExpression:
<com.webobjects.jdbcadaptor.FrontbasePlugIn$FrontbaseExpression: "SELECT
t0."C_AMOUNT", t0."C_AUCTION_ID", t0."C_COMM_PARTNER_ID", t0."C_CREATION_DATE",
t0."C_CREATOR_ID", t0."C_PRICE", t0."C_PT_ID", t0."C_SHEET_CONFIRMED",
t0."C_UID", t0."C_VALID_OFFER" FROM "T_PRICE_OFFER" t0 WHERE t0."C_UID" =
1000275" withBindings: >
08:18:48.471 DEBUG 0 row(s) processed
08:18:48.473 DEBUG === Commit Internal Transaction
SPC: failed-to-fetch _EOIntegralKeyGlobalID[DBPriceOffer
(java.lang.Integer)1000275] (<DBPriceOffer@1165696376 PK:1000275
/EC:1655327563> / class model.DBPriceOffer), missing []
???? -> <DBPriceOffer@1165696376 PK:1000275 /EC:1655327563>
===
???? setting new valid PO of [DBAuction.1000015]: <DBPriceOffer@34841915
PK:null N /EC:73728309> -> [DBPriceOffer.1000206] IN.this 73728309 IN.po
73728309
Why does it say PK:null? If a permanent GID has been assigned, should be PK
not have a value? And it is null, then null is getting cached here
_lastValidPOCacheGID[this.permanentGlobalID()]=npo.permanentGlobalID() Which
I think explains why it is neither found in the EC or fetched?
Well search me. Perhaps this is the gist of the problem? I thought it is normal
for the PK to be null until saved to DB; anyway, if I fall back from
faultForGlobalID to my hack[*], then this code:
Is permanentGlobalID something that you wrote? The global ID is based on the
PK so the PK value must be known. Are you creating the GID with the PK but not
setting it on the EO? That might cause EOF to generate a different PK when you
save and then GID != PK value which could lead to some of the results you are
seeing. Wonder does this correctly, check the implementation there.
I will try and find time to read more later.
Chuck
===
println "po PK:${po.primaryKeyNumericValue()} / WPK:${po.primaryKey()}"
println "po perm: ${po.permanentGlobalID()}"
println "po PK:${po.primaryKeyNumericValue()} / WPK:${po.primaryKey()}"
println "???? setting found last valid PO of ${this.permanentGlobalID()}: $po
-> ${po.permanentGlobalID()} IN ${po.editingContext.hashCode()}"
===
logs out these results:
===
???? setting new valid PO of _EOIntegralKeyGlobalID[DBAuction
(java.lang.Integer)1000015]: <DBPriceOffer@522270846 PK:null N /EC:813009222>
-> _EOIntegralKeyGlobalID[DBPriceOffer (java.lang.Integer)1000277] IN.this
813009222 IN.po 813009222
08:51:26.236 DEBUG === Begin Internal Transaction //log:NSLog
[WorkerThread0]
08:51:26.236 DEBUG evaluateExpression:
<com.webobjects.jdbcadaptor.FrontbasePlugIn$FrontbaseExpression: "SELECT
t0."C_AMOUNT", t0."C_AUCTION_ID", t0."C_COMM_PARTNER_ID", t0."C_CREATION_DATE",
t0."C_CREATOR_ID", t0."C_PRICE", t0."C_PT_ID", t0."C_SHEET_CONFIRMED",
t0."C_UID", t0."C_VALID_OFFER" FROM "T_PRICE_OFFER" t0 WHERE t0."C_UID" =
1000277" withBindings: > //log:NSLog [WorkerThread0]
08:51:26.245 DEBUG 0 row(s) processed //log:NSLog [WorkerThread0]
08:51:26.443 DEBUG === Commit Internal Transaction //log:NSLog
[WorkerThread0]
???? fetched valid PO of _EOIntegralKeyGlobalID[DBAuction
(java.lang.Integer)1000015]: _EOIntegralKeyGlobalID[DBPriceOffer
(java.lang.Integer)1000277] -> null IN 813009222
po PK:-2 / WPK:null
po perm: _EOIntegralKeyGlobalID[DBPriceOffer (java.lang.Integer)1000277]
po PK:-2 / WPK:null
???? setting found last valid PO of _EOIntegralKeyGlobalID[DBAuction
(java.lang.Integer)1000015]: <DBPriceOffer@522270846 PK:null N /EC:813009222>
-> _EOIntegralKeyGlobalID[DBPriceOffer (java.lang.Integer)1000277] IN 813009222
===
where PK/primaryKeyNumericValue is my ancient pre-Wonder primary key code,
which I have re-surrected for reference:
===
int primaryKeyNumericValue {
EOEditingContext ec=editingContext();
if (ec==nil) return -1; // not yet inserted
EOGlobalID gid=ec.globalIDForObject(this);
if (gid==nil || gid.isTemporary()) return -2; // not yet assigned
NSArray kvs=((EOKeyGlobalID)gid).keyValuesArray();
if (kvs==nil || kvs.count()!=1) return -3; // not single PK, never
happens in my model
Object k=kvs.objectAtIndex(0);
if (!(k instanceof Integer)) return -3; // not integer PK, never
happens in my model
return ((Integer)k).intValue();
}
===
Thanks for any isight,
OC
[*] the hack:
===
def lvpo=this.editingContext().objectForGlobalID(gid) // finds it
if exists in EC, or...
if (!lvpo) {
lvpo=ERXEOGlobalIDUtilities.fetchObjectWithGlobalID(this.editingContext(),gid)
// ... fetches if does not
println "???? fetched valid PO of ${this.permanentGlobalID()}:
${gid} -> ${lvpo} IN ${this.editingContext.hashCode()}"
} else println "???? found valid PO of ${this.permanentGlobalID()}:
${gid} -> ${lvpo} IN ${this.editingContext.hashCode()}".toString()
===
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