Examples of com.sleepycat.je.DatabaseException

com.sleepycat.je.DatabaseException
The root of all BDB JE-defined exceptions.
Exceptions thrown by BDB JE fall into three categories.
1. When a method is used incorrectly as the result of an application programming error, a standard Java runtime exception is thrown: {@link IllegalArgumentException}, {@link IllegalStateException} or {@link UnsupportedOperationException}. These exceptions have the standard meaning defined by their javadoc. Note that JE throws {@link IllegalArgumentException} rather than {@link NullPointerException} when arequired parameter is null.
2. When an operation failure occurs, {@link OperationFailureException} orone of its subclasses is thrown. See {@link OperationFailureException} fordetails.
3. When an {@code Environment} failure occurs, {@link EnvironmentFailureException} or one of its subclasses is thrown. See {@link EnvironmentFailureException} for details.
{@link OperationFailureException} and {@link EnvironmentFailureException}are the only two direct subclasses of {@code DatabaseException}.

(Actually the above statement is not strictly correct. {@link EnvironmentFailureException} extends {@link RunRecoveryException} whichextends {@code DatabaseException}. {@link RunRecoveryException} exists forbackward compatibility and has been deprecated. {@link EnvironmentFailureException} should be used instead.)
Note that in some cases, certain methods return status values without issuing an exception. This occurs in situations that are not normally considered an error, but when some informational status is returned. For example, {@link com.sleepycat.je.Database#get Database.get} returns {@link com.sleepycat.je.OperationStatus#NOTFOUND OperationStatus.NOTFOUND} when arequested key does not appear in the database.

     * Return the key for this duplicate set.
     */
    public byte[] getDupKey()
        throws DatabaseException {


        throw new DatabaseException(shortClassName() + ".getDupKey() called");
    }

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        if (entryTargets[idx] == null) {
            /* Fault object in from log. */
            long lsn = getLsn(idx);
            if (lsn == DbLsn.NULL_LSN) {
                if (!isEntryKnownDeleted(idx)) {
                    throw new DatabaseException(makeFetchErrorMsg
                        ("NULL_LSN without KnownDeleted", this, lsn,
                         entryStates[idx]));
                }


                /*
                 * Ignore a NULL_LSN (return null) if KnownDeleted is set.
                 * This is the remnant of an incomplete insertion -- see
                 * Tree.insert. [#13126]
                 */
            } else {
                try {
                    EnvironmentImpl env = databaseImpl.getDbEnvironment();
                    Node node = (Node) env.getLogManager().get(lsn);
                    node.postFetchInit(databaseImpl, lsn);
                    entryTargets[idx] = node;
                    updateMemorySize(null, node);
                } catch (LogFileNotFoundException LNFE) {
                    if (!isEntryKnownDeleted(idx) &&
                        !isEntryPendingDeleted(idx)) {
                        throw new DatabaseException
                            (makeFetchErrorMsg(LNFE.toString(),
                                               this,
                                               lsn,
                                               entryStates[idx]));
                    }


                    /*
                     * Ignore. Cleaner got to the log file, so just return
                     * null.  It is safe to ignore a deleted file for a
                     * pendingDeleted entry because the cleaner will not clean
                     * files with active transactions.
                     */
                } catch (Exception e) {
                    throw new DatabaseException
                        (makeFetchErrorMsg(e.toString(), this, lsn,
                                           entryStates[idx]),
                         e);
                }
            }

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    void accountForSubtreeRemoval(INList inList,
                                  UtilizationTracker tracker) 
        throws DatabaseException {


        if (nEntries > 1) {
            throw new DatabaseException
                ("Found non-deletable IN " + getNodeId() +
                 " while flushing INList. nEntries = " + nEntries);
        }


        /* Remove self. */

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     * ever called.
     */
    public void addToQueue(Object o)
        throws DatabaseException {


        throw new DatabaseException
            ("Cleaner.addToQueue should never be called.");
    }

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                nFilesCleaned += 1;
                accumulatePerRunCounters();
                finished = true;
            } catch (IOException IOE) {
                Tracer.trace(env, "Cleaner", "doClean", "", IOE);
                throw new DatabaseException(IOE);
            } finally {
                currentFile = null;
                String traceMsg =
                    "CleanerRun " + nCleanerRuns + 
                    " on file 0x" + Long.toHexString(fileNumValue) +

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      if (!resyncReader(DbLsn.makeLsn
            (prevFileNum.longValue(),
                       DbLsn.MAX_FILE_OFFSET),
            false)) {


          throw new DatabaseException
        ("Cannot read backward over cleaned file" +
         " from " + readBufferFileNum +
         " to " + prevFileNum);
      }
        }

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            } else {
                throw new EOFException();
            }
        } catch (IOException e) {
            e.printStackTrace();
            throw new DatabaseException
    ("Problem in fillReadBuffer, readBufferFileNum = " + 
     readBufferFileNum + ": " + e.getMessage());


        } finally {
            if (fileHandle != null) {

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                }
            } else {
                obsoleteLsn = LogUtils.readLong(entryBuffer);
            }
        } catch (IllegalAccessException e) {
            throw new DatabaseException(e);
        } catch (InstantiationException e) {
            throw new DatabaseException(e);
        }
    }

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        try {
            item = (LogReadable) logClass.newInstance();
            item.readFromLog(entryBuffer, entryTypeVersion);
        } catch (IllegalAccessException e) {
            throw new DatabaseException(e);
        } catch (InstantiationException e) {
            throw new DatabaseException(e);
        }
    }

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  throws DatabaseException {


        try {
            return (LogEntry) logClass.newInstance();
        } catch (InstantiationException e){
            throw new DatabaseException(e);
        } catch (IllegalAccessException e){
            throw new DatabaseException(e);
        }
    }

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