parse/src/main/java/com/alibaba/otter/canal/parse/inbound/mysql/LocalBinLogConnection.java [185:253]:
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        List<File> currentBinlogs = binlogs.currentBinlogs();
        File current = currentBinlogs.get(currentBinlogs.size() - 1);
        long timestampSeconds = timestampMills / 1000;

        String binlogFilename = null;
        long binlogFileOffset = 0;

        FileLogFetcher fetcher = new FileLogFetcher(bufferSize);
        LogDecoder decoder = new LogDecoder();
        decoder.handle(LogEvent.FORMAT_DESCRIPTION_EVENT);
        decoder.handle(LogEvent.QUERY_EVENT);
        decoder.handle(LogEvent.XID_EVENT);
        LogContext context = new LogContext();
        try {
            fetcher.open(current);
            context.setLogPosition(new LogPosition(current.getName()));
            while (running) {
                boolean needContinue = true;
                String lastXidLogFilename = current.getName();
                long lastXidLogFileOffset = 0;

                binlogFilename = lastXidLogFilename;
                binlogFileOffset = lastXidLogFileOffset;
                while (fetcher.fetch()) {
                    LogEvent event = decoder.decode(fetcher, context);
                    if (event != null) {
                        checkServerId(event);

                        if (event.getWhen() > timestampSeconds) {
                            break;
                        }

                        needContinue = false;
                        if (LogEvent.QUERY_EVENT == event.getHeader().getType()) {
                            if (StringUtils.endsWithIgnoreCase(((QueryLogEvent) event).getQuery(), "BEGIN")) {
                                binlogFilename = lastXidLogFilename;
                                binlogFileOffset = lastXidLogFileOffset;
                            } else if (StringUtils.endsWithIgnoreCase(((QueryLogEvent) event).getQuery(), "COMMIT")) {
                                lastXidLogFilename = current.getName();
                                lastXidLogFileOffset = event.getLogPos();
                            }
                        } else if (LogEvent.XID_EVENT == event.getHeader().getType()) {
                            lastXidLogFilename = current.getName();
                            lastXidLogFileOffset = event.getLogPos();
                        } else if (LogEvent.FORMAT_DESCRIPTION_EVENT == event.getHeader().getType()) {
                            lastXidLogFilename = current.getName();
                            lastXidLogFileOffset = event.getLogPos();
                        }
                    }
                }

                if (needContinue) {// 读取下一个
                    fetcher.close(); // 关闭上一个文件

                    File nextFile = binlogs.getBefore(current);
                    if (nextFile == null) {
                        break;
                    }

                    current = nextFile;
                    fetcher.open(current);
                    context.setLogPosition(new LogPosition(current.getName()));
                } else {
                    break;// 跳出
                }
            }
        } finally {
            if (fetcher != null) {
                fetcher.close();
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parse/src/main/java/com/alibaba/otter/canal/parse/inbound/mysql/LocalBinLogConnection.java [327:395]:
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        List<File> currentBinlogs = binlogs.currentBinlogs();
        File current = currentBinlogs.get(currentBinlogs.size() - 1);
        long timestampSeconds = timestampMills / 1000;

        String binlogFilename = null;
        long binlogFileOffset = 0;

        FileLogFetcher fetcher = new FileLogFetcher(bufferSize);
        LogDecoder decoder = new LogDecoder();
        decoder.handle(LogEvent.FORMAT_DESCRIPTION_EVENT);
        decoder.handle(LogEvent.QUERY_EVENT);
        decoder.handle(LogEvent.XID_EVENT);
        LogContext context = new LogContext();
        try {
            fetcher.open(current);
            context.setLogPosition(new LogPosition(current.getName()));
            while (running) {
                boolean needContinue = true;
                String lastXidLogFilename = current.getName();
                long lastXidLogFileOffset = 0;

                binlogFilename = lastXidLogFilename;
                binlogFileOffset = lastXidLogFileOffset;
                while (fetcher.fetch()) {
                    LogEvent event = decoder.decode(fetcher, context);
                    if (event != null) {
                        checkServerId(event);

                        if (event.getWhen() > timestampSeconds) {
                            break;
                        }

                        needContinue = false;
                        if (LogEvent.QUERY_EVENT == event.getHeader().getType()) {
                            if (StringUtils.endsWithIgnoreCase(((QueryLogEvent) event).getQuery(), "BEGIN")) {
                                binlogFilename = lastXidLogFilename;
                                binlogFileOffset = lastXidLogFileOffset;
                            } else if (StringUtils.endsWithIgnoreCase(((QueryLogEvent) event).getQuery(), "COMMIT")) {
                                lastXidLogFilename = current.getName();
                                lastXidLogFileOffset = event.getLogPos();
                            }
                        } else if (LogEvent.XID_EVENT == event.getHeader().getType()) {
                            lastXidLogFilename = current.getName();
                            lastXidLogFileOffset = event.getLogPos();
                        } else if (LogEvent.FORMAT_DESCRIPTION_EVENT == event.getHeader().getType()) {
                            lastXidLogFilename = current.getName();
                            lastXidLogFileOffset = event.getLogPos();
                        }
                    }
                }

                if (needContinue) {// 读取下一个
                    fetcher.close(); // 关闭上一个文件

                    File nextFile = binlogs.getBefore(current);
                    if (nextFile == null) {
                        break;
                    }

                    current = nextFile;
                    fetcher.open(current);
                    context.setLogPosition(new LogPosition(current.getName()));
                } else {
                    break;// 跳出
                }
            }
        } finally {
            if (fetcher != null) {
                fetcher.close();
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