New example for ch03.

ch03/src/main/java/client/ScanSlicingExample.java

@@ -0,0 +1,66 @@
+package client;
+
+// cc ScanSlicingExample Example using offset and limit parameters for scans
+import java.io.IOException;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.HBaseConfiguration;
+import org.apache.hadoop.hbase.TableName;
+import org.apache.hadoop.hbase.client.Connection;
+import org.apache.hadoop.hbase.client.ConnectionFactory;
+import org.apache.hadoop.hbase.client.Result;
+import org.apache.hadoop.hbase.client.ResultScanner;
+import org.apache.hadoop.hbase.client.Scan;
+import org.apache.hadoop.hbase.client.Table;
+
+import util.HBaseHelper;
+
+public class ScanSlicingExample {
+
+  private static Table table = null;
+
+  // vv ScanSlicingExample
+  private static void scan(int num, int caching, int batch, int offset,
+    int maxResults, int maxResultSize) throws IOException {
+    int count = 1;
+    Scan scan = new Scan()
+      .setCaching(caching)
+      .setBatch(batch)
+      .setRowOffsetPerColumnFamily(offset)
+      .setMaxResultsPerColumnFamily(maxResults)
+      .setMaxResultSize(maxResultSize);
+    ResultScanner scanner = table.getScanner(scan);
+    System.out.println("Scan #" + num + " running...");
+    for (Result result : scanner) {
+      System.out.println("Result [" + count++ + "]:" + result);
+    }
+    scanner.close();
+  }
+
+  public static void main(String[] args) throws IOException {
+    // ^^ ScanSlicingExample
+    Configuration conf = HBaseConfiguration.create();
+
+    HBaseHelper helper = HBaseHelper.getHelper(conf);
+    helper.dropTable("testtable");
+    helper.createTable("testtable", "colfam1", "colfam2");
+    helper.fillTable("testtable", 1, 10, 10, 2, true, "colfam1", "colfam2");
+
+    Connection connection = ConnectionFactory.createConnection(conf);
+    table = connection.getTable(TableName.valueOf("testtable"));
+
+    // vv ScanSlicingExample
+    /*...*/
+    scan(1, 100, 0, 0, 2, -1);
+    scan(2, 100, 0, 4, 2, -1);
+    scan(3, 100, 2, 0, 5, -1);
+    scan(4, 1, 0, 0, -1, 50);
+    /*...*/
+    // ^^ ScanSlicingExample
+    table.close();
+    connection.close();
+    helper.close();
+    // vv ScanSlicingExample
+  }
+  // ^^ ScanSlicingExample
+}