[Java] Rename group id and package name. (#7864)

* Initial

* Change streaming's

* Fix

* Fix

* Fix org_ray

* Fix cpp file name

* Fix streaming

* Fix

* Fix

* Fix testlistening

* Fix missing sth in python

* Fix

* Fix

* Fix SPI

* Fix

* Fix complation

* Fix

* Fix CI

* Fix checkstyle

Fix checkstyle

* Fix streaming tests

* Fix streaming CI

* Fix streaming checkstyle.

* Fix build

* Fix bazel dep

* Fix

* Fix ray checkstyle

* Fix streaming checkstyle

* Fix bazel checkstyle

streaming/python/context.py

@@ -11,7 +11,7 @@ class StreamingContext:
     """
     Main entry point for ray streaming functionality.
     A StreamingContext is also a wrapper of java
-    `org.ray.streaming.api.context.StreamingContext`
+    `io.ray.streaming.api.context.StreamingContext`
     """
 
     class Builder:

streaming/python/datastream.py

@@ -68,7 +68,7 @@ class DataStream(Stream):
     """
     Represents a stream of data which applies a transformation executed by
     python. It's also a wrapper of java
-    `org.ray.streaming.python.stream.PythonDataStream`
+    `io.ray.streaming.python.stream.PythonDataStream`
     """
 
     def __init__(self, input_stream, j_stream, streaming_context=None):
@@ -220,7 +220,7 @@ class DataStream(Stream):
 
 class KeyDataStream(Stream):
     """Represents a DataStream returned by a key-by operation.
-     Wrapper of java org.ray.streaming.python.stream.PythonKeyDataStream
+     Wrapper of java io.ray.streaming.python.stream.PythonKeyDataStream
     """
 
     def __init__(self, input_stream, j_stream):
@@ -254,7 +254,7 @@ class KeyDataStream(Stream):
 
 class StreamSource(DataStream):
     """Represents a source of the DataStream.
-     Wrapper of java org.ray.streaming.python.stream.PythonStreamSource
+     Wrapper of java io.ray.streaming.python.stream.PythonStreamSource
     """
 
     def __init__(self, j_stream, streaming_context, source_func):
@@ -277,7 +277,7 @@ class StreamSource(DataStream):
 
 class StreamSink(Stream):
     """Represents a sink of the DataStream.
-     Wrapper of java org.ray.streaming.python.stream.PythonStreamSink
+     Wrapper of java io.ray.streaming.python.stream.PythonStreamSink
     """
 
     def __init__(self, input_stream, j_stream, func):

streaming/python/function.py

@@ -275,7 +275,7 @@ def load_function(descriptor_func_bytes: bytes):
     Deserialize `descriptor_func_bytes` to get function info, then
     get or load streaming function.
     Note that this function must be kept in sync with
-     `org.ray.streaming.runtime.python.GraphPbBuilder.serializeFunction`
+     `io.ray.streaming.runtime.python.GraphPbBuilder.serializeFunction`
 
     Args:
         descriptor_func_bytes: serialized function info

streaming/python/partition.py

@@ -88,7 +88,7 @@ def load_partition(descriptor_partition_bytes: bytes):
     Deserialize `descriptor_partition_bytes` to get partition info, then
     get or load partition function.
     Note that this function must be kept in sync with
-     `org.ray.streaming.runtime.python.GraphPbBuilder.serializePartition`
+     `io.ray.streaming.runtime.python.GraphPbBuilder.serializePartition`
 
     Args:
         descriptor_partition_bytes: serialized partition info

streaming/python/runtime/gateway_client.py

@@ -10,7 +10,7 @@ class GatewayClient:
     """GatewayClient is used to interact with `PythonGateway` java actor"""
 
     _PYTHON_GATEWAY_CLASSNAME = \
-        b"org.ray.streaming.runtime.python.PythonGateway"
+        b"io.ray.streaming.runtime.python.PythonGateway"
 
     def __init__(self):
         self._python_gateway_actor = ray.java_actor_class(