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From s..@apache.org
Subject svn commit: r1432539 - in /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util: IdGenerator.java SequentialNumber.java
Date Sun, 13 Jan 2013 01:13:30 GMT
Author: shv
Date: Sun Jan 13 01:13:29 2013
New Revision: 1432539

URL: http://svn.apache.org/viewvc?rev=1432539&view=rev
Log:
HDFS-1245. Plugable block id generation. Contributed by Konstantin Shvachko.

Added:
    hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/IdGenerator.java
  (with props)
Modified:
    hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/SequentialNumber.java

Added: hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/IdGenerator.java
URL: http://svn.apache.org/viewvc/hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/IdGenerator.java?rev=1432539&view=auto
==============================================================================
--- hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/IdGenerator.java
(added)
+++ hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/IdGenerator.java
Sun Jan 13 01:13:29 2013
@@ -0,0 +1,31 @@
+/**
+ * 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.util;
+
+import org.apache.hadoop.classification.InterfaceAudience;
+
+/**
+ * Generic ID generator
+ * used for generating various types of number sequences.
+ */
+@InterfaceAudience.Private
+public interface IdGenerator {
+
+  /** Increment and then return the next value. */
+  public long nextValue();
+}

Propchange: hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/IdGenerator.java
------------------------------------------------------------------------------
    svn:mime-type = text/plain

Modified: hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/SequentialNumber.java
URL: http://svn.apache.org/viewvc/hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/SequentialNumber.java?rev=1432539&r1=1432538&r2=1432539&view=diff
==============================================================================
--- hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/SequentialNumber.java
(original)
+++ hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/SequentialNumber.java
Sun Jan 13 01:13:29 2013
@@ -27,7 +27,7 @@ import org.apache.hadoop.classification.
  * This class is thread safe.
  */
 @InterfaceAudience.Private
-public abstract class SequentialNumber {
+public abstract class SequentialNumber implements IdGenerator {
   private final AtomicLong currentValue;
 
   /** Create a new instance with the given initial value. */



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