ReplicationEntry.java

package com.splout.db.common;

/*
 * #%L
 * Splout SQL commons
 * %%
 * Copyright (C) 2012 Datasalt Systems S.L.
 * %%
 * 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.
 * #L%
 */

import org.codehaus.jackson.annotate.JsonIgnoreProperties;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

/**
 * An entry in a {@link ReplicationMap}. It consists of a shard id and a list of nodes (addresses in the form host:port).
 *
 * @see ReplicationMap
 */
@SuppressWarnings("serial")
@JsonIgnoreProperties(ignoreUnknown = true) // Backwards compatibility in JSON (new fields don't make things break)
public class ReplicationEntry extends BaseBean implements Serializable, Comparable<ReplicationEntry> {

  public String toString() {
    return "Shard:" + shard + ", nodes:" + nodes + ", expected rep.factor: " + expectedReplicationFactor;
  }

  Integer shard;
  List<String> nodes;
  int expectedReplicationFactor;

  public ReplicationEntry() {

  }

  public ReplicationEntry(int shard, String... nodes) {
    this.shard = shard;
    this.nodes = new ArrayList<String>();
    this.nodes.addAll(Arrays.asList(nodes));
    this.expectedReplicationFactor = this.nodes.size();
  }

  // ----------------- //
  public Integer getShard() {
    return shard;
  }

  public void setShard(Integer shard) {
    this.shard = shard;
  }

  public List<String> getNodes() {
    return nodes;
  }

  public void setNodes(List<String> nodes) {
    this.nodes = nodes;
  }

  public void setExpectedReplicationFactor(int expectedReplicationFactor) {
    this.expectedReplicationFactor = expectedReplicationFactor;
  }

  public int getExpectedReplicationFactor() {
    return expectedReplicationFactor;
  }

  @Override
  public boolean equals(Object obj) {
    ReplicationEntry reEntry = (ReplicationEntry) obj;
    return shard.equals(reEntry.shard);
  }

  public int hashCode() {
    return shard.hashCode();
  }

  @Override
  public int compareTo(ReplicationEntry o) {
    return shard.compareTo(o.shard);
  }
}