write_op.h

// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
#ifndef KUDU_CLIENT_WRITE_OP_H
#define KUDU_CLIENT_WRITE_OP_H

#include <string>

#include "kudu/client/shared_ptr.h"
#include "kudu/common/partial_row.h"
#include "kudu/util/kudu_export.h"

namespace kudu {

class EncodedKey;

namespace client {

namespace internal {
class Batcher;
class WriteRpc;
} // namespace internal

class KuduTable;

class KUDU_EXPORT KuduWriteOperation {
 public:
  enum Type {
    INSERT = 1,
    UPDATE = 2,
    DELETE = 3,
    UPSERT = 4
  };
  virtual ~KuduWriteOperation();

  const KuduPartialRow& row() const { return row_; }

  KuduPartialRow* mutable_row() { return &row_; }

  virtual std::string ToString() const = 0;
 protected:

  explicit KuduWriteOperation(const sp::shared_ptr<KuduTable>& table);

  virtual Type type() const = 0;

  sp::shared_ptr<KuduTable> const table_;

  KuduPartialRow row_;


 private:
  friend class internal::Batcher;
  friend class internal::WriteRpc;

  // Create and encode the key for this write (key must be set)
  //
  // Caller takes ownership of the allocated memory.
  EncodedKey* CreateKey() const;

  const KuduTable* table() const { return table_.get(); }

  // Return the number of bytes required to buffer this operation,
  // including direct and indirect data. Once called, the result is cached
  // so subsequent calls will return the size previously computed.
  int64_t SizeInBuffer() const;

  mutable int64_t size_in_buffer_;

  DISALLOW_COPY_AND_ASSIGN(KuduWriteOperation);
};


class KUDU_EXPORT KuduInsert : public KuduWriteOperation {
 public:
  virtual ~KuduInsert();

  virtual std::string ToString() const OVERRIDE { return "INSERT " + row_.ToString(); }

 protected:

  virtual Type type() const OVERRIDE {
    return INSERT;
  }


 private:
  friend class KuduTable;
  explicit KuduInsert(const sp::shared_ptr<KuduTable>& table);
};

class KUDU_EXPORT KuduUpsert : public KuduWriteOperation {
 public:
  virtual ~KuduUpsert();

  virtual std::string ToString() const OVERRIDE { return "UPSERT " + row_.ToString(); }

 protected:

  virtual Type type() const OVERRIDE {
    return UPSERT;
  }


 private:
  friend class KuduTable;
  explicit KuduUpsert(const sp::shared_ptr<KuduTable>& table);
};


class KUDU_EXPORT KuduUpdate : public KuduWriteOperation {
 public:
  virtual ~KuduUpdate();

  virtual std::string ToString() const OVERRIDE { return "UPDATE " + row_.ToString(); }

 protected:

  virtual Type type() const OVERRIDE {
    return UPDATE;
  }


 private:
  friend class KuduTable;
  explicit KuduUpdate(const sp::shared_ptr<KuduTable>& table);
};


class KUDU_EXPORT KuduDelete : public KuduWriteOperation {
 public:
  virtual ~KuduDelete();

  virtual std::string ToString() const OVERRIDE { return "DELETE " + row_.ToString(); }

 protected:

  virtual Type type() const OVERRIDE {
    return DELETE;
  }


 private:
  friend class KuduTable;
  explicit KuduDelete(const sp::shared_ptr<KuduTable>& table);
};

} // namespace client
} // namespace kudu

#endif