Step 5: Build the Application

NOTE: When building and running your application, you may want to use a classpath for printing to standard output. The following classpaths are available with MapR:

mapr classpath: Prints CLASSPATH to standard output. This classpath could be used to build your application classpath to run MapR applications for YARN and other components.
mapr clientclasspath: Prints CLASSPATH for MapR-DB clients to standard output. The clientclasspath could be used to build the classpath to run your MapR-DB (binary and JSON) and MpaR-ES streams applications.

MapR-DB JSON

Build Your Java Application: This section shows how to build a Java application that uses OJAI and accesses MapR-DB JSON tables.
Managing JSON Tables: This section describes how to create, list, and delete JSON tables as well as set permissions and manage column families using either the MapR Java API library or the MapR-DB Shell commands.
Creating JSON Documents in Java OJAI: This section provides several Java examples of creating a document.
Examples: Inserting JSON Documents: This section shows how to insert a document or data into a document store (MapR-DB JSON table) with Java and dbshell.
Examples: Querying JSON Documents: This section provides several examples of querying documents.
MapR-DB JSON MapReduce: Sample App: This sample Java application extends the Apache Hadoop MapReduce framework to read records (JSON documents) from a JSON table and inserts new documents into another JSON table. This API library allows you to write your own MapReduce applications to write data from one JSON table to another.

MapR-DB Binary

C API Examples: This section provides examples using the MapR-DB libMapRClient C API to operate on MapR-DB binary tables.
MapR-DB Sample C Application: This section provides additional sample C applications that accesses and performs operations on MapR-DB binary tables.

MapR-ES Streams

Sample Java Consumer: This sample Java consumer application iterates through the returned records, extracts the value of each message, and prints the value to standard output.
Sample Java Producer: This sample Java producer application publishes messages to a stream topic.
Developing a MapR-ES C Application: These sample C applications publish messages to a stream topic and consumes the messages.
Developing MapR-ES Python Applications: These sample Python applications publish messages to a stream topic and consumes the messages.

MapR-FS

FileAceTest.java: This Java application demonstrates how to set, get, modify, and delete ACEs on files using the Java APIs.
hdfs_write_revised.c: This C application demonstrates how to write to files by using the hdfsWrite() and hdfsPwrite() APIs.
hdfs_read_revised.c: This C application demonstrates how to read from files by using the hdfsRead() and hdfsPread() APIs.
hdfs_connect_as_user.c: This C application demonstrates how to create and write to files impersonating another user by using the hdfsConnectAsUser() API.

Github Repo

You can find additional sample code on the MapR Demos Github repository.