DataStax-Examples/blobs-java

Binary Large Objects ( Blobs ) can be useful when the data doesn't fit into a standardCassandra data type. Some examples of common Blob usage are for images or largefiles. Be careful of the size of your blobs, though: it's best to break them up so that each blob cell is 1 MB or less.Contributor(s): Olivier Michallat, Tomasz Lelek - derived fromhereObjectivesDemonstrate how to write and read these blob data type columns in a Java applicationProject LayoutApp.java - The main application fileHow this Sample WorksBy default, the Java DataStax Driver maps blob types to java.nio.ByteBuffer.The ByteBuffer API is a bit tricky to use at times, so we will show common pitfalls as well. We strongly recommend that you read thejava.nio.Buffer andByteBuffer API docs and become familiar with the capacity, limit, andposition properties. This tutorial is also useful.Setup and RunningPrerequisitesJDK 14A Cassandra cluster is running and accessible through the contacts points and data center identified in application.confRunningBuildingAt the project root levelmvn clean packageThis builds the JAR file located at target/storing-and-retrieving-blobs-1.0.jarRun the programjava -jar target/storing-and-retrieving-blobs-1.0.jarThis will produce output similar to the following:Writing retrieved buffer to /var/folders/v5/f93lqcsx2fj4__41f7l5w5j80000gn/T/blob6758286736353817789.png