Examples of org.chaidb.db.exception.ChaiDBException

org.chaidb.db.exception.ChaiDBException
Provide the top level class representing the exception object. This class caters to the requirement of giving out a short error message, a long error message giving the details and the error code, in case of failures.
The two products, IXD and IDC would subclass this class repsectively. For IXD the XDIException would subclass from this class.

     */
    public static boolean removeElementChildElement(String path, String elementID, String childElementName, String childElementID, Hashtable filterCannotRemoved) throws ChaiDBException {


        ConfigTool element = ConfigTool.findElementByPath(path, elementID);
        if (element == null) {
            throw new ChaiDBException(ErrorCode.INVALID_INPUT_PARAM, "the config " + elementID + "has not exist!");
        }
        return element.removeChildElement(childElementName, childElementID, filterCannotRemoved);


    }

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        if (!attributes.containsKey(attributeName)) {
            try {
                attributes.put(attributeName, attributeValue);
            } catch (Exception ex) {
                throw new ChaiDBException(ErrorCode.INVALID_INPUT_PARAM, "adding attribute name or adding attribute " + "value can't be null");
            }
        } else {
            throw new ChaiDBException(ErrorCode.INVALID_INPUT_PARAM, "the Attribute " + attributeName + "has existed!");
        }


    }

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        recA = (byte[]) lsnList.get(lsn);


        if (recA == null) {
            String details = "Lsn: " + lsn.getFileId() + ":" + lsn.getOffset() + ".";
            throw new ChaiDBException(ErrorCode.LOG_RECORD_NOT_EXIST, details);
        } else {
            return recA;
        }
    }

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    public synchronized LogRecord get(Lsn lsn, Lsn stopLsn) throws ChaiDBException {
        //modified by marriane 2001-11-21 add 'synchronized'
        byte[] recA = getBytes(lsn, stopLsn);


        if (recA == null) {
            throw new ChaiDBException(ErrorCode.LOG_RECORD_NOT_EXIST, "Lsn=" + lsn);
        }


        return RecordFactory.createRecord(recA, 0);
    }

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        //Judge whether system are doing checkpoint.
        //ilockerId = lockManager.id();
        //lock = lockManager.get(ilockerId, lockManager.LOCK_WAITING, lockManager.OBJECT_OBJECT, checkpointOjb, lockManager.LOCK_READ);
        //lockManager.put(lock);


        if (DbEnvironment.READ_ONLY) throw new ChaiDBException(ErrorCode.DATABASE_IS_READONLY);


        //I don't know whether the logic is right ? Check it when release.
        if (flagCheck(flags, DB_TXN_NOWAIT | DB_TXN_NOSYNC | DB_TXN_SYNC))
            throw new ChaiDBException(ErrorCode.ILLEGAL_FLAG_BEGIN_TXN);
        if (flagCombinationCheck(flags, DB_TXN_NOSYNC, DB_TXN_SYNC) == false)
            throw new ChaiDBException(ErrorCode.ILLEGAL_COMBINATION_FLAG_BEGIN_TXN);
        //if ( txnChain.size() >= maxTxns)
        //    throw new ChaiDBException(ErrorCode.MAXIMUM_ACTIVE_TXNS, "The number of transaction is reach maximum.");
        if (freePool.isEmpty()) {   //Free transaction pool is empty.
            txn = new TransactionImpl(this);  //Allocate memory from heap.
        } else {
            txn = (TransactionImpl) freePool.remove(); //Removes an element from the pool.
        }
        /* Sets the flags of transaction. */
        if ((flags & Transaction.TXN_DIRTY_READ) != 0) txn.setFlags(Transaction.TXN_DIRTY_READ);
        if ((flags & Transaction.TXN_NOSYNC) != 0) txn.setFlags(Transaction.TXN_NOSYNC);
        if ((flags & Transaction.TXN_SYNC) != 0) txn.setFlags(Transaction.TXN_SYNC);
        if ((flags & Transaction.TXN_NOWAIT) != 0) txn.setFlags(Transaction.TXN_NOWAIT);


        /*
         * We do not have to write begin records (and if we do not, then we
         * need never write records for read-only transactions).  However,
         * we do need to find the current LSN so that we can store it in the
         * transaction structure, so we can know where to take checkpoints.
* Note: Here Zhu Liang will put the value into the beginLsn field of the begun transaction instance.
         */


        /* Environment is being recovered by recover routine. Note: <this.flags> */
        if ((TransactionManagerImpl.flags & TXN_IN_RECOVERY) != 0) {
            throw new ChaiDBException(ErrorCode.IN_RECOVER_PROCESS);
        }


        /* Make sure that we aren't still recovering prepared transactions. Using only during XA recovery.*/
        //if (nRestoredTxns != 0){
        //  throw new ChaiDBException("txn_begin: recovery of prepared but not yet committed transactions is incomplete.");

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    private synchronized void saveEnvironment() throws ChaiDBException {
        try {
            DBState.getInstance().setLatestTxnId(lastTxnId);
        } catch (Exception e) {
            logger.error(e);
            throw new ChaiDBException(ErrorCode.TXN_ENV_SAVE_FAILED, e.toString());
        }


    }

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    /**
     * converts first 28 byte array into LogRecord instance
     */
    public boolean read(byte[] bArr, int start) throws ChaiDBException {
        if (bArr == null) {
            throw new ChaiDBException(ErrorCode.LOG_BYTE_ARRAY_IS_NULL);
        }


        /* get the values of Hdr object */
        if (!header.read(bArr, start)) {
            throw new ChaiDBException(ErrorCode.LOG_RECORD_HEADER_CANNOT_READ);
        }
        int logLen = header.getLength();


        if (logLen == 0 || logLen > LogManagerImpl.READ_LOG_CHUNK_SIZE) {
            throw new ChaiDBException(ErrorCode.INVALID_LOG_RECORD, "invalid log record length");
        }


        /* get the values of LogRecord object */
        int hdrLen = Hdr.getHdrLength();
        int step = start + hdrLen;

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        Link lk = (Link) txnsLog.get(id);
        if (lk == null) {
            if (txnsLog.size() < maxCount) {
                lk = new Link();
                txnsLog.put(id, lk);
            } else throw new ChaiDBException(ErrorCode.TXN_TOO_MANY_IN_MEMORY);
        }
        // record the in-memory log only when the status is normal
        if (lk.status == NORMAL) lk.insertHead(record);
    }

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     */
    public void commit(int txnId) throws ChaiDBException {
        Integer id = new Integer(txnId);
        Link lk = (Link) txnsLog.get(id);
        if (lk == null) return;
        if (lk.status != PRE_COMMIT) throw new ChaiDBException(ErrorCode.TRANSACTION_LACK_PRECOMMIT);
        cleanMemoryLog(txnId);
    }

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        try {
            if (!bNotified) wait();
        } catch (InterruptedException e) {
            String errMessage = "The waiting lock is interrupted" + e.getMessage();
            logger.error(errMessage);
            throw new ChaiDBException(ErrorCode.LOCK_INTERRUPTED, errMessage);
        }
    }

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