private Resource<T> cacheAndDecodeSourceData(A data) throws IOException {
        long startTime = LogTime.getLogTime();
        SourceWriter<A> writer = new SourceWriter<A>(loadProvider.getSourceEncoder(), data);
        diskCacheProvider.getDiskCache().put(resultKey.getOriginalKey(), writer);
        if (Log.isLoggable(TAG, Log.VERBOSE)) {
            logWithTimeAndKey("Wrote source to cache", startTime);
        }

        startTime = LogTime.getLogTime();
        Resource<T> result = loadFromCache(resultKey.getOriginalKey());
        if (Log.isLoggable(TAG, Log.VERBOSE) && result != null) {
            logWithTimeAndKey("Decoded source from cache", startTime);
        }
        return result;
    }
Returns a transformed and transcoded resource decoded from source data, or null if no source data could be
obtained or no resource could be decoded.

<p>
    Depending on the {@link DiskCacheStrategy} used, source data is either decoded
    directly or first written to the disk cache and then decoded from the disk cache.
</p>

@throws Exception
core/src/main/java/com/bumptech/glide/load/engine/DecodeJob.java