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+package parallelai.spyglass.hbase.example
+
+import org.apache.hadoop.conf.Configuration
+import org.apache.hadoop.hbase._
+import org.apache.hadoop.hbase.client.HBaseAdmin
+import org.apache.hadoop.hbase.client.HTable
+import org.apache.hadoop.hbase.client.Put
+import org.apache.hadoop.hbase.client.Scan
+import org.apache.hadoop.hbase.util.Bytes
+import junit.framework.Assert
+import org.junit.runner.RunWith
+import org.scalatest.WordSpecLike
+import org.scalatest.MustMatchers
+import org.scalatest.junit.JUnitRunner
+import org.slf4j.LoggerFactory
+
+/**
+ * Generates TWO tables in HBase 'TABLE_01' and 'TABLE_02', populate with some data
+ * and perform a number of tests
+ *
+ * @author Antwnis@gmail.com
+ */
+@RunWith(classOf[JUnitRunner])
+class HBaseReadTest extends MustMatchers with WordSpecLike {
+
+ val QUORUM = "localhost"
+ val QUORUM_PORT = "2181"
+ val STARTING_TIMESTAMP = 1260000000000L
+
+ val log = LoggerFactory.getLogger(this.getClass.getName)
+
+ var config:Configuration = HBaseConfiguration.create
+ config.set("hbase.zookeeper.quorum", QUORUM)
+ config.set("hbase.zookeeper.property.clientPort", QUORUM_PORT)
+
+ log.info("Connecting to Zookeeper {}:{}", QUORUM, QUORUM_PORT)
+
+ "An HBase integration test" must {
+
+ "generate 2 testing HBase tables" in {
+
+ val testingTables = List("TABLE_01", "TABLE_02")
+
+ try {
+ testingTables.foreach(deleteTestTable(_,config))
+ testingTables.foreach(createTestTable(_,config))
+ testingTables.foreach(populateTestTable(_,config))
+ testingTables.foreach(printHTable(_,config))
+
+ // If we've reached here - the testing data are in
+ Assert.assertEquals("true", "true")
+ } catch {
+ case e: Exception =>
+ log.error("EXCEPTION ===> {}", e.toString())
+ }
+
+ }
+
+ "perform a SCAN_ALL in an HBase table" in {
+
+ }
+
+ "perform a SCAN_RANGE in an HBase table" in {
+
+ }
+
+ "perform a GET_LIST in an HBase table" in {
+
+ }
+
+
+ }
+
+
+ /**
+ * Method to disable and delete HBase Tables i.e. "int-test-01"
+ */
+ private def deleteTestTable(tableName: String, config: Configuration ) = {
+
+ val hbaseAdmin = new HBaseAdmin(config)
+ if (hbaseAdmin.tableExists(tableName)) {
+ log.info("Table: " + tableName + " exists.")
+ hbaseAdmin.disableTable(tableName)
+ hbaseAdmin.deleteTable(tableName)
+ log.info("Table: " + tableName + " disabled and deleted.")
+ } else {
+ log.info("Table: " + tableName + " does not exist.")
+ }
+ hbaseAdmin.close()
+
+ }
+
+ def createTestTable(tableName: String, config: Configuration) = {
+
+ val hbase = new HBaseAdmin(config)
+ // Get and set the name of the new table
+ val newTable = new HTableDescriptor(tableName)
+
+ val meta = new HColumnDescriptor("data")
+ .setMaxVersions(3)
+ .setInMemory(HColumnDescriptor.DEFAULT_IN_MEMORY)
+ .setBlockCacheEnabled(HColumnDescriptor.DEFAULT_BLOCKCACHE)
+ .setTimeToLive(HColumnDescriptor.DEFAULT_TTL)
+
+ newTable.addFamily(meta)
+
+ try {
+ log.info("Creating table " + tableName)
+ hbase.createTable(newTable)
+ } catch {
+ case et: TableExistsException =>
+ log.error("TableExistsException for table: {} ",tableName)
+ log.debug(et.toString())
+ case e: Exception =>
+ log.error("IOException: " + e.toString)
+ }
+
+ hbase.close
+ }
+
+ private def populateTestTable(testingTable: String, config: Configuration) = {
+
+ // Load up HBase table
+ val table = new HTable(config, testingTable)
+
+ log.info("Populating table: " + testingTable)
+
+ // Table_01
+ if (testingTable == "TABLE_01") {
+ val put1 = new Put("2000-01-01 10:00:10".getBytes()).add("data".getBytes(), "column1".getBytes(), STARTING_TIMESTAMP, "1".getBytes())
+ val put2 = new Put("2000-01-01 10:05:00".getBytes()).add("data".getBytes(), "column1".getBytes(), STARTING_TIMESTAMP, "2".getBytes())
+ val put3 = new Put("2000-01-01 10:10:00".getBytes()).add("data".getBytes(), "column1".getBytes(), STARTING_TIMESTAMP, "3".getBytes())
+ table.put(put1)
+ table.put(put2)
+ table.put(put3)
+ } else
+ // Table_02
+ if (testingTable == "TABLE_02") {
+
+ // 3 versions at 10 o'clock
+ val k1 = "2000-01-01 10:00:00".getBytes()
+ val put1 = new Put(k1).add("data".getBytes(), "column1".getBytes(), STARTING_TIMESTAMP, "1".getBytes())
+ val put2 = new Put(k1).add("data".getBytes(), "column1".getBytes(), STARTING_TIMESTAMP + 1000L, "2".getBytes())
+ val put3 = new Put(k1).add("data".getBytes(), "column1".getBytes(), STARTING_TIMESTAMP + 2000L, "3".getBytes())
+
+ // 3 versions at 11 o'clock
+ val k2 = "2000-01-01 11:00:00".getBytes()
+ val put4 = new Put(k2).add("data".getBytes(), "column1".getBytes(), STARTING_TIMESTAMP, "4".getBytes())
+ val put5 = new Put(k2).add("data".getBytes(), "column1".getBytes(), STARTING_TIMESTAMP + 1000L, "5".getBytes())
+ val put6 = new Put(k2).add("data".getBytes(), "column1".getBytes(), STARTING_TIMESTAMP + 2000L, "6".getBytes())
+
+ import scala.collection.JavaConverters._
+ table.put(List(put1, put2, put3, put4, put5, put6).asJava)
+ }
+
+ table.close
+ }
+
+ /**
+ * Method to print-out an HTable
+ */
+ private def printHTable(testingTable: String, config: Configuration) = {
+
+ val table = new HTable(config, testingTable)
+ val scanner = table.getScanner(new Scan())
+
+ log.info("Printing HTable: " + Bytes.toString(table.getTableName()))
+
+ try {
+ // Iterate results
+ // for (Result rr = scanner.next() rr != null rr = scanner.next()) {
+ while (scanner.iterator().hasNext) {
+ val rr = scanner.iterator().next
+ val key = Bytes.toString(rr.getRow())
+ var iter = rr.list().iterator()
+
+ var header = "Key:\t"
+ var data = key + "\t"
+
+ while (iter.hasNext()) {
+ val kv = iter.next()
+ header += Bytes.toString(CellUtil.cloneFamily(kv)) + ":" + Bytes.toString(CellUtil.cloneQualifier(kv)) + "\t"
+ data += Bytes.toString(CellUtil.cloneValue(kv)) + "\t"
+ }
+
+ log.info(header)
+ log.info(data)
+ }
+ } finally {
+ // Close scanners when done
+ scanner.close
+ table.close
+ }
+ }
+
+} \ No newline at end of file