public CacheFileContent readCacheItem()

in commons-jcs3-sandbox/commons-jcs3-yajcache/src/main/java/org/apache/commons/jcs/yajcache/file/CacheFileDAO.java [90:144]
51 lines of code
9 McCabe index (conditional complexity)

    public CacheFileContent readCacheItem(@NonNullable String cacheName, @NonNullable String key)
    {
        File file = CacheFileUtils.inst.getCacheFile(cacheName, key);

        if (!file.exists())
            return null;
        final long fileSize = file.length();

        if (fileSize <= CacheFileContent.MIN_FILE_LENGTH) {
            countCorruptMinLength.incrementAndGet();
            log.warn("Corrupted file which failed the minimum length condition for cacheName="
                    + cacheName + " key=" + key);
            return CacheFileContent.CORRUPTED;
        }
        RandomAccessFile raf = null;
        try {
            raf = new RandomAccessFile(file, "r");
            CacheFileContent cfc = CacheFileContent.getInstance(raf);

            if (cfc.isValid()) {
                final int contentLength = (int)fileSize - CacheFileContent.MIN_FILE_LENGTH;

                if (contentLength != cfc.getContentLength()) {
                    countCorruptLength.incrementAndGet();
                    log.warn("Corrupted file with unexpected content length for cacheName="
                            + cacheName + " key=" + key);
                    return CacheFileContent.CORRUPTED;
                }
            }
            else
            {
                countCorruptInvalid.incrementAndGet();
                log.warn("Corrupted file for cacheName=" + cacheName
                        + " key=" + key);
                return CacheFileContent.CORRUPTED;
            }
            return cfc;
        } catch (IOException ex) {
            countReadIOException.incrementAndGet();
            log.warn(ex.getClass().getName(), ex);
        } catch (org.apache.commons.lang3.SerializationException ex) {
            countReadIOException.incrementAndGet();
            log.warn(ex.getClass().getName(), ex);
       } finally {
            if (raf != null) {
                try {
                    raf.close();
                } catch (Exception ex) {
                    countReadCloseException.incrementAndGet();
                    log.error("", ex);
                }
            }
        }
        return CacheFileContent.CORRUPTED;
    }