HADOOP-16830. RemoteIterators

-move to hadoop.util.functional
-add unit tests
-use in more code to see how well they work
-tune close() and factory names

I'm happy with them internally, we do need to mark as unstable at first
though.

Change-Id: I6493412c2de53468f8c6f6f2184be07db12c00b0

Author: steveloughran

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/FutureIOSupport.java

@@ -32,8 +32,8 @@
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FSBuilder;
-import org.apache.hadoop.fs.functional.CallableRaisingIOE;
-import org.apache.hadoop.fs.functional.RuntimeIOException;
+import org.apache.hadoop.util.functional.CallableRaisingIOE;
+import org.apache.hadoop.util.functional.RuntimeIOException;
 
 /**
  * Support for future IO and the FS Builder subclasses.

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/WrappedIOException.java

@@ -25,7 +25,7 @@
 
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
-import org.apache.hadoop.fs.functional.RuntimeIOException;
+import org.apache.hadoop.util.functional.RuntimeIOException;
 
 /**
  * A wrapper for an IOException which

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/functional/BiFunctionRaisingIOE.java renamed to hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/functional/BiFunctionRaisingIOE.java

@@ -16,7 +16,7 @@
  * limitations under the License.
  */
 
-package org.apache.hadoop.fs.functional;
+package org.apache.hadoop.util.functional;
 
 import java.io.IOException;
 

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/functional/CallableRaisingIOE.java renamed to hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/functional/CallableRaisingIOE.java

@@ -16,7 +16,7 @@
  * limitations under the License.
  */
 
-package org.apache.hadoop.fs.functional;
+package org.apache.hadoop.util.functional;
 
 import java.io.IOException;
 

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/functional/ConsumerRaisingIOE.java renamed to hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/functional/ConsumerRaisingIOE.java

@@ -16,7 +16,7 @@
  * limitations under the License.
  */
 
-package org.apache.hadoop.fs.functional;
+package org.apache.hadoop.util.functional;
 
 import java.io.IOException;
 

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/functional/FunctionRaisingIOE.java renamed to hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/functional/FunctionRaisingIOE.java

@@ -16,7 +16,7 @@
  * limitations under the License.
  */
 
-package org.apache.hadoop.fs.functional;
+package org.apache.hadoop.util.functional;
 
 import java.io.IOException;