HADOOP-3187. Forgot to add the file QuotaExceededException.java in the last commit.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/core/trunk@663486 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/hadoop/dfs/QuotaExceededException.java

@@ -0,0 +1,55 @@
+/**
+ * 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.hadoop.dfs;
+
+import java.io.IOException;
+
+/** This class is for the error when an attempt to add an inode to namespace 
+ * violates the quota restriction of any inode on the path to the newly added
+ * inode.
+ */
+public final class QuotaExceededException extends IOException {
+  private static final long serialVersionUID = 1L;
+  private String pathName;
+  private long quota;
+  private long count;
+  
+  public QuotaExceededException(String msg) {
+    super(msg);
+  }
+  
+  public QuotaExceededException(long quota, long count) {
+    this.quota = quota;
+    this.count = count;
+  }
+  
+  public void setPathName(String path) {
+    this.pathName = path;
+  }
+  
+  public String getMessage() {
+    String msg = super.getMessage();
+    if (msg == null) {
+      return "The quota" + pathName==null?"":(" of " + pathName) + 
+          " is exceeded: quota=" + quota + " count=" + count;
+    } else {
+      return msg;
+    }
+  }
+}