Hi Stone, you are right, there's a problem in the ManagedCursor.hasMoreEntries() when the cursor hasn't been "initialized" (ie: read from) and it's opened in a new session. I fixed that and added a new test case in http://github.com/merlimat/managed-ledger/commit/60fa8a93f09715cb64a9d02f4e4430122e50d48a
On the other hand I cannot reproduce the problem with cursor.getNumberOfEntries(), I consistently get the right value. Thank you for catching and pointing out this bug. Matteo On Jun 10, 2012, at 11:19 PM, Stone wrote: Hi Guys, I am experimenting the managed-ledger implementation ( https://github.com/merlimat/managed-ledger ). It works good in one session, but if I add some entries to managed ledger and shutdown the first session and then start a new session. Managed cursor no longer give right number of entries. Here's what I did with managed-legers (I paly with managed-ledger with scala repl ) Start a new scala repl and input the following code: import org.apache.bookkeeper.mledger._ import org.apache.bookkeeper.mledger.impl._ val factory = new ManagedLedgerFactoryImpl("127.0.0.1:2181<http://127.0.0.1:2181/>") val ledger = factory.open("my_test_ledger") val cursor = ledger.openCursor("c1"); ledger.addEntry("dummy-entry-1".getBytes()) // add one entry to managed ledger scala> cursor.getNumberOfEntries // # of entries are correct in the same session res1: Long = 1 scala> cursor.hasMoreEntries //# there's one entry added but not consumed yet, so hasMoreEntires is true. res2: Boolean = true Then I quit the scala repl and start a new one with the following code ( I expect for the same cursor "c1" the number of entries should be 1 and hasMoreEntries should be true but it's not) import org.apache.bookkeeper.mledger._ import org.apache.bookkeeper.mledger.impl._ val factory = new ManagedLedgerFactoryImpl("127.0.0.1:2181<http://127.0.0.1:2181/>") val ledger = factory.open("my_test_ledger") val cursor = ledger.openCursor("c1"); scala> cursor.getNumberOfEntries res0: Long = 1 // this number is correct and wrong sometimes. I noticed it return 11 once but I only added 1 entry in the last session. scala> cursor.hasMoreEntries // this is inconsistent with cursor.getNumberOfEntries, there's 1 entry not consumed so cursor.hasMoreEntries should return true not false. res1: Boolean = false Any suggestions ? Best Regards, Stone matteo merli technical yahoo! [email protected]<mailto:[email protected]> direct 408-336-6035 701 first avenue, sunnyvale, ca, 94089-0703, us phone (408) 349 3300 fax (408) 349 3301 [cid:DF0C4C0F-53B5-433E-BD38-901D3506823B]
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