com.spotify.helios.servicescommon.coordination.CheckWithVersion Maven / Gradle / Ivy

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/*
 * Copyright (c) 2014 Spotify AB.
 *
 * 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.
 */

package com.spotify.helios.servicescommon.coordination;

import org.apache.curator.framework.api.transaction.CuratorTransaction;

public class CheckWithVersion implements ZooKeeperOperation {

  private final String path;
  private final int version;

  public CheckWithVersion(final String path, final int version) {
    this.path = path;
    this.version = version;
  }

  @Override
  public void register(final CuratorTransaction transaction) throws Exception {
    transaction.check().withVersion(version).forPath(path);
  }

  @Override
  public String toString() {
    return "CheckWithVersion{" +
           "path='" + path + '\'' +
           ", version=" + version +
           '}';
  }

  @Override
  public boolean equals(final Object o) {
    if (this == o) {
      return true;
    }
    if (o == null || getClass() != o.getClass()) {
      return false;
    }

    final CheckWithVersion that = (CheckWithVersion) o;

    if (version != that.version) {
      return false;
    }
    return path != null ? path.equals(that.path) : that.path == null;

  }

  @Override
  public int hashCode() {
    int result = path != null ? path.hashCode() : 0;
    result = 31 * result + version;
    return result;
  }
}