From c8c7a37afa2e23398490c5112090efbc7c7de221 Mon Sep 17 00:00:00 2001
From: Asias He <asias@cloudius-systems.com>
Date: Mon, 27 Apr 2015 14:58:18 +0800
Subject: [PATCH] locator: Import RackInferringSnitch.java

---
 locator/RackInferringSnitch.java | 37 ++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 locator/RackInferringSnitch.java

diff --git a/locator/RackInferringSnitch.java b/locator/RackInferringSnitch.java
new file mode 100644
index 0000000000..a6ea1abd53
--- /dev/null
+++ b/locator/RackInferringSnitch.java
@@ -0,0 +1,37 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 org.apache.cassandra.locator;
+
+import java.net.InetAddress;
+
+/**
+ * A simple endpoint snitch implementation that assumes datacenter and rack information is encoded
+ * in the 2nd and 3rd octets of the ip address, respectively.
+ */
+public class RackInferringSnitch extends AbstractNetworkTopologySnitch
+{
+    public String getRack(InetAddress endpoint)
+    {
+        return Integer.toString(endpoint.getAddress()[2] & 0xFF, 10);
+    }
+
+    public String getDatacenter(InetAddress endpoint)
+    {
+        return Integer.toString(endpoint.getAddress()[1] & 0xFF, 10);
+    }
+}