feature: coordination recipes

coordination/src/main/java/tech/ydb/coordination/impl/SessionImpl.java

@@ -162,7 +162,7 @@ private CompletableFuture<Result<Long>> connectToSession(Stream stream, long ses
             }
         }, executor);
 
-        // and send session start message with id of previos session (or zero if it's first connect)
+        // and send session start message with id of previous session (or zero if it's first connect)
         return stream.sendSessionStart(sessionID, nodePath, connectTimeout, protectionKey);
     }
 

coordination/src/main/java/tech/ydb/coordination/recipes/election/ElectionParticipant.java

@@ -0,0 +1,55 @@
+package tech.ydb.coordination.recipes.election;
+
+import java.util.Arrays;
+import java.util.Objects;
+
+public class ElectionParticipant {
+    private final long sessionId;
+    private final byte[] data;
+    private final boolean isLeader;
+
+    public ElectionParticipant(long id, byte[] data, boolean isLeader) {
+        this.sessionId = id;
+        this.data = data;
+        this.isLeader = isLeader;
+    }
+
+    public long getSessionId() {
+        return sessionId;
+    }
+
+    public byte[] getData() {
+        return data;
+    }
+
+    public boolean isLeader() {
+        return isLeader;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        ElectionParticipant that = (ElectionParticipant) o;
+        return sessionId == that.sessionId && isLeader == that.isLeader &&
+                Objects.deepEquals(data, that.data);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(sessionId, Arrays.hashCode(data), isLeader);
+    }
+
+    @Override
+    public String toString() {
+        return "ElectionParticipant{" +
+                "sessionId=" + sessionId +
+                ", data=" + Arrays.toString(data) +
+                ", isLeader=" + isLeader +
+                '}';
+    }
+}