private AddResponse getAddResponse()

in bookkeeper-server/src/main/java/org/apache/bookkeeper/proto/WriteEntryProcessorV3.java [52:161]
99 lines of code
17 McCabe index (conditional complexity)

    private AddResponse getAddResponse() {
        final long startTimeNanos = MathUtils.nowInNano();
        AddRequest addRequest = request.getAddRequest();
        long ledgerId = addRequest.getLedgerId();
        long entryId = addRequest.getEntryId();

        final AddResponse.Builder addResponse = AddResponse.newBuilder()
                .setLedgerId(ledgerId)
                .setEntryId(entryId);

        if (!isVersionCompatible()) {
            addResponse.setStatus(StatusCode.EBADVERSION);
            return addResponse.build();
        }

        if (requestProcessor.getBookie().isReadOnly()
            && !(RequestUtils.isHighPriority(request)
                    && requestProcessor.getBookie().isAvailableForHighPriorityWrites())) {
            logger.warn("BookieServer is running as readonly mode, so rejecting the request from the client!");
            addResponse.setStatus(StatusCode.EREADONLY);
            return addResponse.build();
        }

        BookkeeperInternalCallbacks.WriteCallback wcb = new BookkeeperInternalCallbacks.WriteCallback() {
            @Override
            public void writeComplete(int rc, long ledgerId, long entryId,
                                      BookieId addr, Object ctx) {
                if (BookieProtocol.EOK == rc) {
                    requestProcessor.getRequestStats().getAddEntryStats()
                        .registerSuccessfulEvent(MathUtils.elapsedNanos(startTimeNanos), TimeUnit.NANOSECONDS);
                } else {
                    requestProcessor.getRequestStats().getAddEntryStats()
                        .registerFailedEvent(MathUtils.elapsedNanos(startTimeNanos), TimeUnit.NANOSECONDS);
                }

                StatusCode status;
                switch (rc) {
                    case BookieProtocol.EOK:
                        status = StatusCode.EOK;
                        break;
                    case BookieProtocol.EIO:
                        status = StatusCode.EIO;
                        break;
                    default:
                        status = StatusCode.EUA;
                        break;
                }
                addResponse.setStatus(status);
                Response.Builder response = Response.newBuilder()
                        .setHeader(getHeader())
                        .setStatus(addResponse.getStatus())
                        .setAddResponse(addResponse);
                Response resp = response.build();
                sendResponse(status, resp, requestProcessor.getRequestStats().getAddRequestStats());
            }
        };
        final EnumSet<WriteFlag> writeFlags;
        if (addRequest.hasWriteFlags()) {
            writeFlags = WriteFlag.getWriteFlags(addRequest.getWriteFlags());
        } else {
            writeFlags = WriteFlag.NONE;
        }
        final boolean ackBeforeSync = writeFlags.contains(WriteFlag.DEFERRED_SYNC);
        StatusCode status = null;
        byte[] masterKey = addRequest.getMasterKey().toByteArray();
        ByteBuf entryToAdd = Unpooled.wrappedBuffer(addRequest.getBody().asReadOnlyByteBuffer());
        try {
            if (RequestUtils.hasFlag(addRequest, AddRequest.Flag.RECOVERY_ADD)) {
                requestProcessor.getBookie().recoveryAddEntry(entryToAdd, wcb,
                        requestHandler.ctx().channel(), masterKey);
            } else {
                requestProcessor.getBookie().addEntry(entryToAdd, ackBeforeSync, wcb,
                        requestHandler.ctx().channel(), masterKey);
            }
            status = StatusCode.EOK;
        } catch (OperationRejectedException e) {
            requestProcessor.getRequestStats().getAddEntryRejectedCounter().inc();
            // Avoid to log each occurrence of this exception as this can happen when the ledger storage is
            // unable to keep up with the write rate.
            if (logger.isDebugEnabled()) {
                logger.debug("Operation rejected while writing {}", request, e);
            }
            status = StatusCode.ETOOMANYREQUESTS;
        } catch (IOException e) {
            logger.error("Error writing entry:{} to ledger:{}",
                    entryId, ledgerId, e);
            status = StatusCode.EIO;
        } catch (BookieException.LedgerFencedException e) {
            logger.error("Ledger fenced while writing entry:{} to ledger:{}",
                    entryId, ledgerId, e);
            status = StatusCode.EFENCED;
        } catch (BookieException e) {
            logger.error("Unauthorized access to ledger:{} while writing entry:{}",
                    ledgerId, entryId, e);
            status = StatusCode.EUA;
        } catch (Throwable t) {
            logger.error("Unexpected exception while writing {}@{} : ",
                    entryId, ledgerId, t);
            // some bad request which cause unexpected exception
            status = StatusCode.EBADREQ;
        }

        // If everything is okay, we return null so that the calling function
        // doesn't return a response back to the caller.
        if (!status.equals(StatusCode.EOK)) {
            addResponse.setStatus(status);
            return addResponse.build();
        }
        return null;
    }