heron/common/src/cpp/zookeeper/zkclient_factory.h

/*
 * Copyright 2015 Twitter, Inc.
 *
 * Licensed 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 SRC_CPP_CORE_ZK_PUBLIC_ZKCLIENT_FACTORY_H_
#define SRC_CPP_CORE_ZK_PUBLIC_ZKCLIENT_FACTORY_H_

#include <string>
#include "zookeeper/zkclient.h"
#include "basics/basics.h"
#include "network/network.h"

class ZKClientFactory {
 public:
  virtual ZKClient* create(const std::string& hostportlist, EventLoop* eventLoop,
                           VCallback<ZKClient::ZkWatchEvent> global_watcher_cb) = 0;

  virtual ~ZKClientFactory() {}
};

class DefaultZKClientFactory : public ZKClientFactory {
 public:
  virtual ZKClient* create(const std::string& hostportlist, EventLoop* eventLoop,
                           VCallback<ZKClient::ZkWatchEvent> global_watcher_cb) {
    if (global_watcher_cb == NULL) {
      return new ZKClient(hostportlist, eventLoop);
    } else {
      return new ZKClient(hostportlist, eventLoop, global_watcher_cb);
    }
  }

  virtual ~DefaultZKClientFactory() {}
};

#endif  // SRC_CPP_CORE_ZK_PUBLIC_ZKCLIENT_FACTORY_H_