Refactored write ahead stuff from streaming.storage to streaming.util

Author: tdas

streaming/src/main/scala/org/apache/spark/streaming/storage/FileSegment.scala renamed to streaming/src/main/scala/org/apache/spark/streaming/util/FileSegment.scala

@@ -14,6 +14,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.spark.streaming.storage
+package org.apache.spark.streaming.util
 
 private[streaming] case class FileSegment (path: String, offset: Long, length: Int)

streaming/src/main/scala/org/apache/spark/streaming/storage/HdfsUtils.scala renamed to streaming/src/main/scala/org/apache/spark/streaming/util/HdfsUtils.scala

@@ -14,7 +14,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.spark.streaming.storage
+package org.apache.spark.streaming.util
 
 import org.apache.hadoop.conf.Configuration
 import org.apache.hadoop.fs.{FSDataInputStream, FSDataOutputStream, Path}

streaming/src/main/scala/org/apache/spark/streaming/storage/WriteAheadLogManager.scala renamed to streaming/src/main/scala/org/apache/spark/streaming/util/WriteAheadLogManager.scala

@@ -14,7 +14,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.spark.streaming.storage
+package org.apache.spark.streaming.util
 
 import java.nio.ByteBuffer
 
@@ -25,18 +25,17 @@ import org.apache.hadoop.conf.Configuration
 import org.apache.hadoop.fs.Path
 import org.apache.hadoop.fs.permission.FsPermission
 import org.apache.spark.Logging
-import org.apache.spark.streaming.storage.WriteAheadLogManager._
-import org.apache.spark.streaming.util.{Clock, SystemClock}
 import org.apache.spark.util.Utils
+import WriteAheadLogManager._
 
 /**
  * This class manages write ahead log files.
  * - Writes records (bytebuffers) to periodically rotating log files.
  * - Recovers the log files and the reads the recovered records upon failures.
  * - Cleans up old log files.
  *
- * Uses [[org.apache.spark.streaming.storage.WriteAheadLogWriter]] to write
- * and [[org.apache.spark.streaming.storage.WriteAheadLogReader]] to read.
+ * Uses [[org.apache.spark.streaming.util.WriteAheadLogWriter]] to write
+ * and [[org.apache.spark.streaming.util.WriteAheadLogReader]] to read.
  *
  *@param logDirectory Directory when rotating log files will be created.
  * @param hadoopConf Hadoop configuration for reading/writing log files.
@@ -199,7 +198,7 @@ private[streaming] class WriteAheadLogManager(
   }
 }
 
-private[storage] object WriteAheadLogManager {
+private[util] object WriteAheadLogManager {
 
   case class LogInfo(startTime: Long, endTime: Long, path: String)
 

streaming/src/main/scala/org/apache/spark/streaming/storage/WriteAheadLogRandomReader.scala renamed to streaming/src/main/scala/org/apache/spark/streaming/util/WriteAheadLogRandomReader.scala

@@ -14,7 +14,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.spark.streaming.storage
+package org.apache.spark.streaming.util
 
 import java.io.Closeable
 import java.nio.ByteBuffer
@@ -23,7 +23,7 @@ import org.apache.hadoop.conf.Configuration
 
 /**
  * A random access reader for reading write ahead log files written using
- * [[org.apache.spark.streaming.storage.WriteAheadLogWriter]]. Given the file segment info,
+ * [[org.apache.spark.streaming.util.WriteAheadLogWriter]]. Given the file segment info,
  * this reads the record (bytebuffer) from the log file.
  */
 private[streaming] class WriteAheadLogRandomReader(path: String, conf: Configuration)

streaming/src/main/scala/org/apache/spark/streaming/storage/WriteAheadLogReader.scala renamed to streaming/src/main/scala/org/apache/spark/streaming/util/WriteAheadLogReader.scala

@@ -14,17 +14,17 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.spark.streaming.storage
+package org.apache.spark.streaming.util
 
-import java.io.{EOFException, Closeable}
+import java.io.{Closeable, EOFException}
 import java.nio.ByteBuffer
 
 import org.apache.hadoop.conf.Configuration
 import org.apache.spark.Logging
 
 /**
  * A reader for reading write ahead log files written using
- * [[org.apache.spark.streaming.storage.WriteAheadLogWriter]]. This reads
+ * [[org.apache.spark.streaming.util.WriteAheadLogWriter]]. This reads
  * the records (bytebuffers) in the log file sequentially and return them as an
  * iterator of bytebuffers.
  */

streaming/src/main/scala/org/apache/spark/streaming/storage/WriteAheadLogWriter.scala renamed to streaming/src/main/scala/org/apache/spark/streaming/util/WriteAheadLogWriter.scala

@@ -14,7 +14,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.spark.streaming.storage
+package org.apache.spark.streaming.util
 
 import java.io._
 import java.net.URI
@@ -24,7 +24,6 @@ import scala.util.Try
 
 import org.apache.hadoop.conf.Configuration
 import org.apache.hadoop.fs.{FSDataOutputStream, FileSystem}
-import org.apache.spark.streaming.storage.FileSegment
 
 /**
  * A writer for writing byte-buffers to a write ahead log file.

streaming/src/test/scala/org/apache/spark/streaming/storage/WriteAheadLogSuite.scala renamed to streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala

@@ -14,26 +14,24 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.spark.streaming.storage
+package org.apache.spark.streaming.util
 
 import java.io.{DataInputStream, File, FileInputStream, RandomAccessFile}
 import java.nio.ByteBuffer
 
 import scala.collection.mutable.ArrayBuffer
 import scala.concurrent.duration._
 import scala.language.implicitConversions
+import scala.language.postfixOps
 import scala.util.Random
 
-import org.scalatest.{BeforeAndAfter, FunSuite}
-import org.scalatest.concurrent.Eventually._
-
+import WriteAheadLogSuite._
 import com.google.common.io.Files
 import org.apache.commons.io.FileUtils
 import org.apache.hadoop.conf.Configuration
-
-import org.apache.spark.streaming.util.ManualClock
 import org.apache.spark.util.Utils
-import WriteAheadLogSuite._
+import org.scalatest.{BeforeAndAfter, FunSuite}
+import org.scalatest.concurrent.Eventually._
 
 /**
  * This testsuite tests all classes related to write ahead logs.