svn commit: r1298656 - /incubator/hama/trunk/core/src/main/java/org/apache/hama/bsp/TrackedRecordReader.java

[ed...@apache.org]

Author: edwardyoon
Date: Thu Mar  8 23:53:48 2012
New Revision: 1298656

URL: http://svn.apache.org/viewvc?rev=1298656&view=rev
Log:
Add missing file

Added:
    incubator/hama/trunk/core/src/main/java/org/apache/hama/bsp/TrackedRecordReader.java

Added: incubator/hama/trunk/core/src/main/java/org/apache/hama/bsp/TrackedRecordReader.java
URL: http://svn.apache.org/viewvc/incubator/hama/trunk/core/src/main/java/org/apache/hama/bsp/TrackedRecordReader.java?rev=1298656&view=auto
==============================================================================
--- incubator/hama/trunk/core/src/main/java/org/apache/hama/bsp/TrackedRecordReader.java (added)
+++ incubator/hama/trunk/core/src/main/java/org/apache/hama/bsp/TrackedRecordReader.java Thu Mar  8 23:53:48 2012
@@ -0,0 +1,76 @@
+/**
+ * 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.hama.bsp;
+
+import java.io.IOException;
+
+public class TrackedRecordReader<K, V> implements RecordReader<K, V> {
+  private RecordReader<K, V> rawIn;
+  private Counters.Counter inputByteCounter;
+  private Counters.Counter inputRecordCounter;
+  private long beforePos = -1;
+  private long afterPos = -1;
+
+  TrackedRecordReader(RecordReader<K, V> raw,
+      Counters.Counter inputRecordCounter, Counters.Counter inputByteCounter)
+      throws IOException {
+    rawIn = raw;
+    this.inputRecordCounter = inputRecordCounter;
+    this.inputByteCounter = inputByteCounter;
+  }
+
+  public K createKey() {
+    return rawIn.createKey();
+  }
+
+  public V createValue() {
+    return rawIn.createValue();
+  }
+
+  public synchronized boolean next(K key, V value) throws IOException {
+    boolean ret = moveToNext(key, value);
+    if (ret) {
+      incrCounters();
+    }
+    return ret;
+  }
+
+  protected void incrCounters() {
+    inputRecordCounter.increment(1);
+    inputByteCounter.increment(afterPos - beforePos);
+  }
+
+  protected synchronized boolean moveToNext(K key, V value) throws IOException {
+    beforePos = getPos();
+    boolean ret = rawIn.next(key, value);
+    afterPos = getPos();
+    return ret;
+  }
+
+  public long getPos() throws IOException {
+    return rawIn.getPos();
+  }
+
+  public void close() throws IOException {
+    rawIn.close();
+  }
+
+  public float getProgress() throws IOException {
+    return rawIn.getProgress();
+  }
+}