Yuta HIGUCHI | 497c884 | 2014-09-25 14:23:34 -0700 | [diff] [blame] | 1 | package org.onlab.onos.store.impl; |
| 2 | |
| 3 | import static com.google.common.base.Preconditions.checkNotNull; |
| 4 | import static com.google.common.base.Preconditions.checkArgument; |
| 5 | |
| 6 | import java.util.Objects; |
| 7 | |
| 8 | import org.onlab.onos.net.ElementId; |
| 9 | import org.onlab.onos.store.Timestamp; |
| 10 | |
| 11 | import com.google.common.base.MoreObjects; |
| 12 | import com.google.common.collect.ComparisonChain; |
| 13 | |
| 14 | // If it is store specific, implement serializable interfaces? |
| 15 | /** |
| 16 | * Default implementation of Timestamp. |
| 17 | */ |
| 18 | public final class OnosTimestamp implements Timestamp { |
| 19 | |
| 20 | private final ElementId id; |
| 21 | private final int termNumber; |
| 22 | private final int sequenceNumber; |
| 23 | |
| 24 | /** |
| 25 | * Default version tuple. |
| 26 | * |
| 27 | * @param id identifier of the element |
| 28 | * @param termNumber the mastership termNumber |
| 29 | * @param sequenceNumber the sequenceNumber number within the termNumber |
| 30 | */ |
| 31 | public OnosTimestamp(ElementId id, int termNumber, int sequenceNumber) { |
| 32 | this.id = checkNotNull(id); |
| 33 | this.termNumber = termNumber; |
| 34 | this.sequenceNumber = sequenceNumber; |
| 35 | } |
| 36 | |
| 37 | @Override |
| 38 | public int compareTo(Timestamp o) { |
| 39 | checkArgument(o instanceof OnosTimestamp, "Must be OnosTimestamp", o); |
| 40 | OnosTimestamp that = (OnosTimestamp) o; |
| 41 | checkArgument(this.id.equals(that.id), |
| 42 | "Cannot compare version for different element this:%s, that:%s", |
| 43 | this, that); |
| 44 | |
| 45 | return ComparisonChain.start() |
| 46 | .compare(this.termNumber, that.termNumber) |
| 47 | .compare(this.sequenceNumber, that.sequenceNumber) |
| 48 | .result(); |
| 49 | } |
| 50 | |
| 51 | @Override |
| 52 | public int hashCode() { |
| 53 | return Objects.hash(id, termNumber, sequenceNumber); |
| 54 | } |
| 55 | |
| 56 | @Override |
| 57 | public boolean equals(Object obj) { |
| 58 | if (this == obj) { |
| 59 | return true; |
| 60 | } |
| 61 | if (!(obj instanceof OnosTimestamp)) { |
| 62 | return false; |
| 63 | } |
| 64 | OnosTimestamp that = (OnosTimestamp) obj; |
| 65 | return Objects.equals(this.id, that.id) && |
| 66 | Objects.equals(this.termNumber, that.termNumber) && |
| 67 | Objects.equals(this.sequenceNumber, that.sequenceNumber); |
| 68 | } |
| 69 | |
| 70 | @Override |
| 71 | public String toString() { |
| 72 | return MoreObjects.toStringHelper(getClass()) |
| 73 | .add("id", id) |
| 74 | .add("termNumber", termNumber) |
| 75 | .add("sequenceNumber", sequenceNumber) |
| 76 | .toString(); |
| 77 | } |
| 78 | |
| 79 | /** |
| 80 | * Returns the element. |
| 81 | * |
| 82 | * @return element identifier |
| 83 | */ |
| 84 | public ElementId id() { |
| 85 | return id; |
| 86 | } |
| 87 | |
| 88 | /** |
| 89 | * Returns the termNumber. |
| 90 | * |
| 91 | * @return termNumber |
| 92 | */ |
| 93 | public int termNumber() { |
| 94 | return termNumber; |
| 95 | } |
| 96 | |
| 97 | /** |
| 98 | * Returns the sequenceNumber number. |
| 99 | * |
| 100 | * @return sequenceNumber |
| 101 | */ |
| 102 | public int sequenceNumber() { |
| 103 | return sequenceNumber; |
| 104 | } |
| 105 | } |