I need to store documents such as .pdf, .doc and .txt files to MaprDB. I saw one example in Hbase where it stores files in binary and is retrieved as files in Hue, but I not sure how it could be implemented. Any idea how can a document be stored in MaprDB?
Store documents (.pdf, .doc and .txt files) in MaprDB
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First thing is , Im not aware about Maprdb as Im using Cloudera. But I have experience in hbase storing many types of objects in hbase as byte array like below mentioned.
Most primitive way of storing in hbase or any other db is byte array. see my answer
You can do that in below way using Apache commons lang API. probably this is best option, which will be applicable to all objects including image/audio/video etc..
please test this method with one of object type of any of your files.
SerializationUtils.serialize
will return bytes. which you can insert.Note :jar of apache commons lang always available in hadoop cluster.(not external dependency)
another example :
For any reason if you don't want to use
SerializationUtils
class provided by Apache commons lang, then you can see below pdf serialize and deserialize example for your better understanding but its lengthy code if you useSerializationUtils
the code will be reduced.Above you are getting byte array you can prepare put request to upload to database i.e Hbase or any other database
Once you persisted, you can get the same using hbase get or
scan
youget
your pdf bytes and use the below code to again make same file i.e someFile.pdf in this case.EDIT : Since you asked HBASE examples I'm adding this.. in the below method
yourcolumnasBytearray
is your doc file for instance pdf.. converted to byte array (usingSerializationUtils.serialize
) in above examples...