The requirement to be thread safe has a few implementation implications for data sources:
Any state that is shared with
runFullAcquisition()needs to be synchronized withstop(). State may be share withcheckFullAcquisitionRequired()and the binary content interfaces (BinaryContentFileProviderandBinaryContentInputStreamProvider).If you are supporting text extraction by implementing either the
BinaryContentFileProviderinterface or theBinaryContentInputStreamProviderinterface, the data source must be thread safe because CAS Server callsBinaryContentFileProvider.getBinaryContentFile()orBinaryContentInputStreamProvider.getBinaryContentInputStream()from multiple threads.
