Question

I am facing issue with run simple Hbase example.

I have create on HbaseTest.java which create one table and insert some records. In Unix, I can able to compile the java class. by.

$javac -classpath hbase-0.94.2.jar:hadoop-core-1.0.4.jar HBaseTest.java

But I am not able to run this program by :
$java -classpath hbase-0.94.2.jar:hadoop-core-1.0.4.jar HBaseTest

Above command is not working for me. Not sure what is the issue ? Is it correct way to run Hbase Java Example ?

Answer 1

You can use “hbase classpath” to get the class path needed.

    /*
     * Compile and run with:
     * javac -cp `hbase classpath` TestHBase.java 
     * java -cp `hbase classpath` TestHBase
     */
    import org.apache.hadoop.conf.Configuration;
    import org.apache.hadoop.hbase.*;
    import org.apache.hadoop.hbase.client.*;
    import org.apache.hadoop.hbase.util.*;

    public class TestHBase {
        public static void main(String[] args) throws Exception {
            Configuration conf = HBaseConfiguration.create();
            HBaseAdmin admin = new HBaseAdmin(conf);
            try {
                HTable table = new HTable(conf, "test-table");
                Put put = new Put(Bytes.toBytes("test-key"));
                put.add(Bytes.toBytes("cf"), Bytes.toBytes("q"), Bytes.toBytes("value"));
                table.put(put);
            } finally {
                admin.close();
            }
        }
    }