be/src/runtime/hbase-table.h

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#ifndef IMPALA_RUNTIME_HBASE_HTABLE_H_
#define IMPALA_RUNTIME_HBASE_HTABLE_H_

#include <boost/thread.hpp>
#include <jni.h>
#include <string>

#include "common/status.h"

namespace impala {

class RuntimeState;

/// Class to wrap JNI calls into Table.
class HBaseTable {
 public:
  HBaseTable(const std::string& table_name, jobject connection);
  ~HBaseTable();

  /// Close and release the Table wrapped by this class.
  void Close(RuntimeState* state);

  /// Create all needed java side objects.
  Status Init();

  /// From a java Scan object get a result scanner that will iterate over
  /// KeyValues from HBase.
  Status GetResultScanner(const jobject& scan, jobject* result_scanner);

  /// Send an list of puts to hbase through a Table.
  Status Put(const jobject& puts_list);

  /// Call this to initialize the HBase Table jni references
  static Status InitJNI();

 private:
  std::string table_name_;
  jobject connection_;
  jobject table_;

  /// org.apache.hadoop.hbase.client.Table
  static jclass table_cl_;

  /// org.apache.hadoop.hbase.client.Connection
  static jclass connection_cl_;

  /// connection.getTable(TableName)
  static jmethodID connection_get_table_id_;

  /// table.close()
  static jmethodID table_close_id_;

  /// table.getScannerId(Scan)
  static jmethodID table_get_scanner_id_;

  /// table.put(List<Put> puts
  static jmethodID table_put_id_;

  /// TableName class and static methods
  static jclass table_name_cl_;

  /// TableName.valueOf(String)
  static jmethodID table_name_value_of_id_;
};

}  // namespace impala
#endif /* IMPALA_RUNTIME_HBASE_HTABLE_H_ */