[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/java/streaming-api/src/main/java/io/ray/streaming/api/Language.java

@@ -1,4 +1,4 @@
-package org.ray.streaming.api;
+package io.ray.streaming.api;
 
 public enum Language {
   JAVA,

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/collector/CollectionCollector.java

@@ -1,7 +1,7 @@
-package org.ray.streaming.api.collector;
+package io.ray.streaming.api.collector;
 
+import io.ray.streaming.message.Record;
 import java.util.List;
-import org.ray.streaming.message.Record;
 
 /**
  * Combination of multiple collectors.

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/collector/Collector.java

@@ -1,4 +1,4 @@
-package org.ray.streaming.api.collector;
+package io.ray.streaming.api.collector;
 
 /**
  * The collector that collects data from an upstream operator, and emits data to downstream

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/context/RuntimeContext.java

@@ -1,4 +1,4 @@
-package org.ray.streaming.api.context;
+package io.ray.streaming.api.context;
 
 /**
  * Encapsulate the runtime information of a streaming task.

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/context/StreamingContext.java

@@ -1,6 +1,10 @@
-package org.ray.streaming.api.context;
+package io.ray.streaming.api.context;
 
 import com.google.common.base.Preconditions;
+import io.ray.streaming.api.stream.StreamSink;
+import io.ray.streaming.jobgraph.JobGraph;
+import io.ray.streaming.jobgraph.JobGraphBuilder;
+import io.ray.streaming.schedule.JobScheduler;
 import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -9,10 +13,6 @@ import java.util.List;
 import java.util.Map;
 import java.util.ServiceLoader;
 import java.util.concurrent.atomic.AtomicInteger;
-import org.ray.streaming.api.stream.StreamSink;
-import org.ray.streaming.jobgraph.JobGraph;
-import org.ray.streaming.jobgraph.JobGraphBuilder;
-import org.ray.streaming.schedule.JobScheduler;
 
 /**
  * Encapsulate the context information of a streaming Job.

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/function/Function.java

@@ -1,4 +1,4 @@
-package org.ray.streaming.api.function;
+package io.ray.streaming.api.function;
 
 import java.io.Serializable;
 

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/function/impl/AggregateFunction.java

@@ -1,6 +1,6 @@
-package org.ray.streaming.api.function.impl;
+package io.ray.streaming.api.function.impl;
 
-import org.ray.streaming.api.function.Function;
+import io.ray.streaming.api.function.Function;
 
 /**
  * Interface of aggregate functions.

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/function/impl/FilterFunction.java

@@ -1,6 +1,6 @@
-package org.ray.streaming.api.function.impl;
+package io.ray.streaming.api.function.impl;
 
-import org.ray.streaming.api.function.Function;
+import io.ray.streaming.api.function.Function;
 
 /**
  * A filter function is a predicate applied individually to each record.

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/function/impl/FlatMapFunction.java

@@ -1,7 +1,7 @@
-package org.ray.streaming.api.function.impl;
+package io.ray.streaming.api.function.impl;
 
-import org.ray.streaming.api.collector.Collector;
-import org.ray.streaming.api.function.Function;
+import io.ray.streaming.api.collector.Collector;
+import io.ray.streaming.api.function.Function;
 
 /**
  * Interface of flat-map functions.

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/function/impl/JoinFunction.java

@@ -1,6 +1,6 @@
-package org.ray.streaming.api.function.impl;
+package io.ray.streaming.api.function.impl;
 
-import org.ray.streaming.api.function.Function;
+import io.ray.streaming.api.function.Function;
 
 /**
  * Interface of join functions.

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/function/impl/KeyFunction.java

@@ -1,6 +1,6 @@
-package org.ray.streaming.api.function.impl;
+package io.ray.streaming.api.function.impl;
 
-import org.ray.streaming.api.function.Function;
+import io.ray.streaming.api.function.Function;
 
 /**
  * Interface of key-by functions.

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/function/impl/MapFunction.java

@@ -1,6 +1,6 @@
-package org.ray.streaming.api.function.impl;
+package io.ray.streaming.api.function.impl;
 
-import org.ray.streaming.api.function.Function;
+import io.ray.streaming.api.function.Function;
 
 /**
  * Interface of map functions.

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/function/impl/ProcessFunction.java

@@ -1,6 +1,6 @@
-package org.ray.streaming.api.function.impl;
+package io.ray.streaming.api.function.impl;
 
-import org.ray.streaming.api.function.Function;
+import io.ray.streaming.api.function.Function;
 
 /**
  * Interface of process functions.

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/function/impl/ReduceFunction.java

@@ -1,6 +1,6 @@
-package org.ray.streaming.api.function.impl;
+package io.ray.streaming.api.function.impl;
 
-import org.ray.streaming.api.function.Function;
+import io.ray.streaming.api.function.Function;
 
 /**
  * Interface of reduce functions.

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/function/impl/SinkFunction.java

@@ -1,6 +1,6 @@
-package org.ray.streaming.api.function.impl;
+package io.ray.streaming.api.function.impl;
 
-import org.ray.streaming.api.function.Function;
+import io.ray.streaming.api.function.Function;
 
 /**
  * Interface of sink functions.

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/function/impl/SourceFunction.java

@@ -1,6 +1,6 @@
-package org.ray.streaming.api.function.impl;
+package io.ray.streaming.api.function.impl;
 
-import org.ray.streaming.api.function.Function;
+import io.ray.streaming.api.function.Function;
 
 /**
  * Interface of Source functions.

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/function/internal/CollectionSourceFunction.java

@@ -1,8 +1,8 @@
-package org.ray.streaming.api.function.internal;
+package io.ray.streaming.api.function.internal;
 
+import io.ray.streaming.api.function.impl.SourceFunction;
 import java.util.ArrayList;
 import java.util.Collection;
-import org.ray.streaming.api.function.impl.SourceFunction;
 
 /**
  * The SourceFunction that fetch data from a Java Collection object.

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/partition/Partition.java

@@ -1,6 +1,6 @@
-package org.ray.streaming.api.partition;
+package io.ray.streaming.api.partition;
 
-import org.ray.streaming.api.function.Function;
+import io.ray.streaming.api.function.Function;
 
 /**
  * Interface of the partitioning strategy.

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/partition/impl/BroadcastPartition.java

@@ -1,7 +1,7 @@
-package org.ray.streaming.api.partition.impl;
+package io.ray.streaming.api.partition.impl;
 
+import io.ray.streaming.api.partition.Partition;
 import java.util.stream.IntStream;
-import org.ray.streaming.api.partition.Partition;
 
 /**
  * Broadcast the record to all downstream partitions.

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/partition/impl/KeyPartition.java

@@ -1,7 +1,7 @@
-package org.ray.streaming.api.partition.impl;
+package io.ray.streaming.api.partition.impl;
 
-import org.ray.streaming.api.partition.Partition;
-import org.ray.streaming.message.KeyRecord;
+import io.ray.streaming.api.partition.Partition;
+import io.ray.streaming.message.KeyRecord;
 
 /**
  * Partition the record by the key.

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/partition/impl/RoundRobinPartition.java

@@ -1,6 +1,6 @@
-package org.ray.streaming.api.partition.impl;
+package io.ray.streaming.api.partition.impl;
 
-import org.ray.streaming.api.partition.Partition;
+import io.ray.streaming.api.partition.Partition;
 
 /**
  * Partition record to downstream tasks in a round-robin matter.

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/stream/DataStream.java

@@ -1,20 +1,20 @@
-package org.ray.streaming.api.stream;
+package io.ray.streaming.api.stream;
 
 
-import org.ray.streaming.api.context.StreamingContext;
-import org.ray.streaming.api.function.impl.FilterFunction;
-import org.ray.streaming.api.function.impl.FlatMapFunction;
-import org.ray.streaming.api.function.impl.KeyFunction;
-import org.ray.streaming.api.function.impl.MapFunction;
-import org.ray.streaming.api.function.impl.SinkFunction;
-import org.ray.streaming.api.partition.Partition;
-import org.ray.streaming.api.partition.impl.BroadcastPartition;
-import org.ray.streaming.operator.StreamOperator;
-import org.ray.streaming.operator.impl.FilterOperator;
-import org.ray.streaming.operator.impl.FlatMapOperator;
-import org.ray.streaming.operator.impl.KeyByOperator;
-import org.ray.streaming.operator.impl.MapOperator;
-import org.ray.streaming.operator.impl.SinkOperator;
+import io.ray.streaming.api.context.StreamingContext;
+import io.ray.streaming.api.function.impl.FilterFunction;
+import io.ray.streaming.api.function.impl.FlatMapFunction;
+import io.ray.streaming.api.function.impl.KeyFunction;
+import io.ray.streaming.api.function.impl.MapFunction;
+import io.ray.streaming.api.function.impl.SinkFunction;
+import io.ray.streaming.api.partition.Partition;
+import io.ray.streaming.api.partition.impl.BroadcastPartition;
+import io.ray.streaming.operator.StreamOperator;
+import io.ray.streaming.operator.impl.FilterOperator;
+import io.ray.streaming.operator.impl.FlatMapOperator;
+import io.ray.streaming.operator.impl.KeyByOperator;
+import io.ray.streaming.operator.impl.MapOperator;
+import io.ray.streaming.operator.impl.SinkOperator;
 
 /**
  * Represents a stream of data.

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/stream/DataStreamSink.java

@@ -1,6 +1,6 @@
-package org.ray.streaming.api.stream;
+package io.ray.streaming.api.stream;
 
-import org.ray.streaming.operator.impl.SinkOperator;
+import io.ray.streaming.operator.impl.SinkOperator;
 
 /**
  * Represents a sink of the DataStream.

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/stream/DataStreamSource.java

@@ -1,11 +1,11 @@
-package org.ray.streaming.api.stream;
+package io.ray.streaming.api.stream;
 
+import io.ray.streaming.api.context.StreamingContext;
+import io.ray.streaming.api.function.impl.SourceFunction;
+import io.ray.streaming.api.function.internal.CollectionSourceFunction;
+import io.ray.streaming.api.partition.impl.RoundRobinPartition;
+import io.ray.streaming.operator.impl.SourceOperator;
 import java.util.Collection;
-import org.ray.streaming.api.context.StreamingContext;
-import org.ray.streaming.api.function.impl.SourceFunction;
-import org.ray.streaming.api.function.internal.CollectionSourceFunction;
-import org.ray.streaming.api.partition.impl.RoundRobinPartition;
-import org.ray.streaming.operator.impl.SourceOperator;
 
 /**
  * Represents a source of the DataStream.

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/stream/JoinStream.java

@@ -1,8 +1,8 @@
-package org.ray.streaming.api.stream;
+package io.ray.streaming.api.stream;
 
+import io.ray.streaming.api.function.impl.JoinFunction;
+import io.ray.streaming.api.function.impl.KeyFunction;
 import java.io.Serializable;
-import org.ray.streaming.api.function.impl.JoinFunction;
-import org.ray.streaming.api.function.impl.KeyFunction;
 
 /**
  * Represents a DataStream of two joined DataStream.

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/stream/KeyDataStream.java

@@ -1,10 +1,10 @@
-package org.ray.streaming.api.stream;
+package io.ray.streaming.api.stream;
 
-import org.ray.streaming.api.function.impl.AggregateFunction;
-import org.ray.streaming.api.function.impl.ReduceFunction;
-import org.ray.streaming.api.partition.impl.KeyPartition;
-import org.ray.streaming.operator.StreamOperator;
-import org.ray.streaming.operator.impl.ReduceOperator;
+import io.ray.streaming.api.function.impl.AggregateFunction;
+import io.ray.streaming.api.function.impl.ReduceFunction;
+import io.ray.streaming.api.partition.impl.KeyPartition;
+import io.ray.streaming.operator.StreamOperator;
+import io.ray.streaming.operator.impl.ReduceOperator;
 
 /**
  * Represents a DataStream returned by a key-by operation.

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/stream/Stream.java

@@ -1,13 +1,13 @@
-package org.ray.streaming.api.stream;
+package io.ray.streaming.api.stream;
 
+import io.ray.streaming.api.context.StreamingContext;
+import io.ray.streaming.api.partition.Partition;
+import io.ray.streaming.api.partition.impl.RoundRobinPartition;
+import io.ray.streaming.operator.StreamOperator;
+import io.ray.streaming.python.PythonOperator;
+import io.ray.streaming.python.PythonPartition;
+import io.ray.streaming.python.stream.PythonStream;
 import java.io.Serializable;
-import org.ray.streaming.api.context.StreamingContext;
-import org.ray.streaming.api.partition.Partition;
-import org.ray.streaming.api.partition.impl.RoundRobinPartition;
-import org.ray.streaming.operator.StreamOperator;
-import org.ray.streaming.python.PythonOperator;
-import org.ray.streaming.python.PythonPartition;
-import org.ray.streaming.python.stream.PythonStream;
 
 /**
  * Abstract base class of all stream types.

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/stream/StreamSink.java

@@ -1,6 +1,6 @@
-package org.ray.streaming.api.stream;
+package io.ray.streaming.api.stream;
 
-import org.ray.streaming.operator.StreamOperator;
+import io.ray.streaming.operator.StreamOperator;
 
 /**
  * Represents a sink of the Stream.

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/stream/StreamSource.java

@@ -1,4 +1,4 @@
-package org.ray.streaming.api.stream;
+package io.ray.streaming.api.stream;
 
 /**
  * A mark interface that represents a source of the Stream.

streaming/java/streaming-api/src/main/java/io/ray/streaming/api/stream/UnionStream.java

@@ -1,8 +1,8 @@
-package org.ray.streaming.api.stream;
+package io.ray.streaming.api.stream;
 
+import io.ray.streaming.operator.StreamOperator;
 import java.util.ArrayList;
 import java.util.List;
-import org.ray.streaming.operator.StreamOperator;
 
 /**
  * Represents a union DataStream.

streaming/java/streaming-api/src/main/java/io/ray/streaming/jobgraph/JobEdge.java

@@ -1,7 +1,7 @@
-package org.ray.streaming.jobgraph;
+package io.ray.streaming.jobgraph;
 
+import io.ray.streaming.api.partition.Partition;
 import java.io.Serializable;
-import org.ray.streaming.api.partition.Partition;
 
 /**
  * Job edge is connection and partition rules of upstream and downstream execution nodes.

streaming/java/streaming-api/src/main/java/io/ray/streaming/jobgraph/JobGraph.java

@@ -1,4 +1,4 @@
-package org.ray.streaming.jobgraph;
+package io.ray.streaming.jobgraph;
 
 import java.io.Serializable;
 import java.util.ArrayList;

streaming/java/streaming-api/src/main/java/io/ray/streaming/jobgraph/JobGraphBuilder.java

@@ -1,15 +1,15 @@
-package org.ray.streaming.jobgraph;
+package io.ray.streaming.jobgraph;
 
+import io.ray.streaming.api.stream.DataStream;
+import io.ray.streaming.api.stream.Stream;
+import io.ray.streaming.api.stream.StreamSink;
+import io.ray.streaming.api.stream.StreamSource;
+import io.ray.streaming.operator.StreamOperator;
+import io.ray.streaming.python.stream.PythonDataStream;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.atomic.AtomicInteger;
-import org.ray.streaming.api.stream.DataStream;
-import org.ray.streaming.api.stream.Stream;
-import org.ray.streaming.api.stream.StreamSink;
-import org.ray.streaming.api.stream.StreamSource;
-import org.ray.streaming.operator.StreamOperator;
-import org.ray.streaming.python.stream.PythonDataStream;
 
 public class JobGraphBuilder {
 

streaming/java/streaming-api/src/main/java/io/ray/streaming/jobgraph/JobVertex.java

@@ -1,9 +1,9 @@
-package org.ray.streaming.jobgraph;
+package io.ray.streaming.jobgraph;
 
 import com.google.common.base.MoreObjects;
+import io.ray.streaming.api.Language;
+import io.ray.streaming.operator.StreamOperator;
 import java.io.Serializable;
-import org.ray.streaming.api.Language;
-import org.ray.streaming.operator.StreamOperator;
 
 /**
  * Job vertex is a cell node where logic is executed.

streaming/java/streaming-api/src/main/java/io/ray/streaming/jobgraph/VertexType.java

@@ -1,4 +1,4 @@
-package org.ray.streaming.jobgraph;
+package io.ray.streaming.jobgraph;
 
 /**
  * Different roles for a node.

streaming/java/streaming-api/src/main/java/io/ray/streaming/message/KeyRecord.java

@@ -1,4 +1,4 @@
-package org.ray.streaming.message;
+package io.ray.streaming.message;
 
 
 public class KeyRecord<K, T> extends Record<T> {

streaming/java/streaming-api/src/main/java/io/ray/streaming/message/Message.java

@@ -1,4 +1,4 @@
-package org.ray.streaming.message;
+package io.ray.streaming.message;
 
 import com.google.common.collect.Lists;
 import java.io.Serializable;

streaming/java/streaming-api/src/main/java/io/ray/streaming/message/Record.java

@@ -1,4 +1,4 @@
-package org.ray.streaming.message;
+package io.ray.streaming.message;
 
 import java.io.Serializable;
 

streaming/java/streaming-api/src/main/java/io/ray/streaming/operator/OneInputOperator.java

@@ -1,6 +1,6 @@
-package org.ray.streaming.operator;
+package io.ray.streaming.operator;
 
-import org.ray.streaming.message.Record;
+import io.ray.streaming.message.Record;
 
 
 public interface OneInputOperator<T> extends Operator {

streaming/java/streaming-api/src/main/java/io/ray/streaming/operator/Operator.java

@@ -1,11 +1,11 @@
-package org.ray.streaming.operator;
+package io.ray.streaming.operator;
 
+import io.ray.streaming.api.Language;
+import io.ray.streaming.api.collector.Collector;
+import io.ray.streaming.api.context.RuntimeContext;
+import io.ray.streaming.api.function.Function;
 import java.io.Serializable;
 import java.util.List;
-import org.ray.streaming.api.Language;
-import org.ray.streaming.api.collector.Collector;
-import org.ray.streaming.api.context.RuntimeContext;
-import org.ray.streaming.api.function.Function;
 
 public interface Operator extends Serializable {
 

streaming/java/streaming-api/src/main/java/io/ray/streaming/operator/OperatorType.java

@@ -1,4 +1,4 @@
-package org.ray.streaming.operator;
+package io.ray.streaming.operator;
 
 public enum OperatorType {
   SOURCE,

streaming/java/streaming-api/src/main/java/io/ray/streaming/operator/StreamOperator.java

@@ -1,12 +1,12 @@
-package org.ray.streaming.operator;
+package io.ray.streaming.operator;
 
+import io.ray.streaming.api.Language;
+import io.ray.streaming.api.collector.Collector;
+import io.ray.streaming.api.context.RuntimeContext;
+import io.ray.streaming.api.function.Function;
+import io.ray.streaming.message.KeyRecord;
+import io.ray.streaming.message.Record;
 import java.util.List;
-import org.ray.streaming.api.Language;
-import org.ray.streaming.api.collector.Collector;
-import org.ray.streaming.api.context.RuntimeContext;
-import org.ray.streaming.api.function.Function;
-import org.ray.streaming.message.KeyRecord;
-import org.ray.streaming.message.Record;
 
 public abstract class StreamOperator<F extends Function> implements Operator {
   protected String name;

streaming/java/streaming-api/src/main/java/io/ray/streaming/operator/TwoInputOperator.java

@@ -1,6 +1,6 @@
-package org.ray.streaming.operator;
+package io.ray.streaming.operator;
 
-import org.ray.streaming.message.Record;
+import io.ray.streaming.message.Record;
 
 
 public interface TwoInputOperator<T, O> extends Operator {

streaming/java/streaming-api/src/main/java/io/ray/streaming/operator/impl/FilterOperator.java

@@ -1,9 +1,9 @@
-package org.ray.streaming.operator.impl;
+package io.ray.streaming.operator.impl;
 
-import org.ray.streaming.api.function.impl.FilterFunction;
-import org.ray.streaming.message.Record;
-import org.ray.streaming.operator.OneInputOperator;
-import org.ray.streaming.operator.StreamOperator;
+import io.ray.streaming.api.function.impl.FilterFunction;
+import io.ray.streaming.message.Record;
+import io.ray.streaming.operator.OneInputOperator;
+import io.ray.streaming.operator.StreamOperator;
 
 public class FilterOperator<T> extends StreamOperator<FilterFunction<T>> implements
     OneInputOperator<T> {

streaming/java/streaming-api/src/main/java/io/ray/streaming/operator/impl/FlatMapOperator.java

@@ -1,13 +1,13 @@
-package org.ray.streaming.operator.impl;
+package io.ray.streaming.operator.impl;
 
+import io.ray.streaming.api.collector.CollectionCollector;
+import io.ray.streaming.api.collector.Collector;
+import io.ray.streaming.api.context.RuntimeContext;
+import io.ray.streaming.api.function.impl.FlatMapFunction;
+import io.ray.streaming.message.Record;
+import io.ray.streaming.operator.OneInputOperator;
+import io.ray.streaming.operator.StreamOperator;
 import java.util.List;
-import org.ray.streaming.api.collector.CollectionCollector;
-import org.ray.streaming.api.collector.Collector;
-import org.ray.streaming.api.context.RuntimeContext;
-import org.ray.streaming.api.function.impl.FlatMapFunction;
-import org.ray.streaming.message.Record;
-import org.ray.streaming.operator.OneInputOperator;
-import org.ray.streaming.operator.StreamOperator;
 
 public class FlatMapOperator<T, R> extends StreamOperator<FlatMapFunction<T, R>> implements
     OneInputOperator<T> {

streaming/java/streaming-api/src/main/java/io/ray/streaming/operator/impl/KeyByOperator.java

@@ -1,10 +1,10 @@
-package org.ray.streaming.operator.impl;
+package io.ray.streaming.operator.impl;
 
-import org.ray.streaming.api.function.impl.KeyFunction;
-import org.ray.streaming.message.KeyRecord;
-import org.ray.streaming.message.Record;
-import org.ray.streaming.operator.OneInputOperator;
-import org.ray.streaming.operator.StreamOperator;
+import io.ray.streaming.api.function.impl.KeyFunction;
+import io.ray.streaming.message.KeyRecord;
+import io.ray.streaming.message.Record;
+import io.ray.streaming.operator.OneInputOperator;
+import io.ray.streaming.operator.StreamOperator;
 
 public class KeyByOperator<T, K> extends StreamOperator<KeyFunction<T, K>> implements
     OneInputOperator<T> {

streaming/java/streaming-api/src/main/java/io/ray/streaming/operator/impl/MapOperator.java

@@ -1,9 +1,9 @@
-package org.ray.streaming.operator.impl;
+package io.ray.streaming.operator.impl;
 
-import org.ray.streaming.api.function.impl.MapFunction;
-import org.ray.streaming.message.Record;
-import org.ray.streaming.operator.OneInputOperator;
-import org.ray.streaming.operator.StreamOperator;
+import io.ray.streaming.api.function.impl.MapFunction;
+import io.ray.streaming.message.Record;
+import io.ray.streaming.operator.OneInputOperator;
+import io.ray.streaming.operator.StreamOperator;
 
 
 public class MapOperator<T, R> extends StreamOperator<MapFunction<T, R>> implements

streaming/java/streaming-api/src/main/java/io/ray/streaming/operator/impl/ReduceOperator.java

@@ -1,15 +1,15 @@
-package org.ray.streaming.operator.impl;
+package io.ray.streaming.operator.impl;
 
+import io.ray.streaming.api.collector.Collector;
+import io.ray.streaming.api.context.RuntimeContext;
+import io.ray.streaming.api.function.impl.ReduceFunction;
+import io.ray.streaming.message.KeyRecord;
+import io.ray.streaming.message.Record;
+import io.ray.streaming.operator.OneInputOperator;
+import io.ray.streaming.operator.StreamOperator;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
-import org.ray.streaming.api.collector.Collector;
-import org.ray.streaming.api.context.RuntimeContext;
-import org.ray.streaming.api.function.impl.ReduceFunction;
-import org.ray.streaming.message.KeyRecord;
-import org.ray.streaming.message.Record;
-import org.ray.streaming.operator.OneInputOperator;
-import org.ray.streaming.operator.StreamOperator;
 
 public class ReduceOperator<K, T> extends StreamOperator<ReduceFunction<T>> implements
     OneInputOperator<T> {

streaming/java/streaming-api/src/main/java/io/ray/streaming/operator/impl/SinkOperator.java

@@ -1,9 +1,9 @@
-package org.ray.streaming.operator.impl;
+package io.ray.streaming.operator.impl;
 
-import org.ray.streaming.api.function.impl.SinkFunction;
-import org.ray.streaming.message.Record;
-import org.ray.streaming.operator.OneInputOperator;
-import org.ray.streaming.operator.StreamOperator;
+import io.ray.streaming.api.function.impl.SinkFunction;
+import io.ray.streaming.message.Record;
+import io.ray.streaming.operator.OneInputOperator;
+import io.ray.streaming.operator.StreamOperator;
 
 
 public class SinkOperator<T> extends StreamOperator<SinkFunction<T>> implements

streaming/java/streaming-api/src/main/java/io/ray/streaming/operator/impl/SourceOperator.java

@@ -1,13 +1,13 @@
-package org.ray.streaming.operator.impl;
+package io.ray.streaming.operator.impl;
 
+import io.ray.streaming.api.collector.Collector;
+import io.ray.streaming.api.context.RuntimeContext;
+import io.ray.streaming.api.function.impl.SourceFunction;
+import io.ray.streaming.api.function.impl.SourceFunction.SourceContext;
+import io.ray.streaming.message.Record;
+import io.ray.streaming.operator.OperatorType;
+import io.ray.streaming.operator.StreamOperator;
 import java.util.List;
-import org.ray.streaming.api.collector.Collector;
-import org.ray.streaming.api.context.RuntimeContext;
-import org.ray.streaming.api.function.impl.SourceFunction;
-import org.ray.streaming.api.function.impl.SourceFunction.SourceContext;
-import org.ray.streaming.message.Record;
-import org.ray.streaming.operator.OperatorType;
-import org.ray.streaming.operator.StreamOperator;
 
 public class SourceOperator<T> extends StreamOperator<SourceFunction<T>> {
 

streaming/java/streaming-api/src/main/java/io/ray/streaming/python/PythonFunction.java

@@ -1,6 +1,6 @@
-package org.ray.streaming.python;
+package io.ray.streaming.python;
 
-import org.ray.streaming.api.function.Function;
+import io.ray.streaming.api.function.Function;
 
 /**
  * Represents a user defined python function.

streaming/java/streaming-api/src/main/java/io/ray/streaming/python/PythonOperator.java

@@ -1,10 +1,10 @@
-package org.ray.streaming.python;
+package io.ray.streaming.python;
 
+import io.ray.streaming.api.Language;
+import io.ray.streaming.api.context.RuntimeContext;
+import io.ray.streaming.operator.OperatorType;
+import io.ray.streaming.operator.StreamOperator;
 import java.util.List;
-import org.ray.streaming.api.Language;
-import org.ray.streaming.api.context.RuntimeContext;
-import org.ray.streaming.operator.OperatorType;
-import org.ray.streaming.operator.StreamOperator;
 
 /**
  * Represents a {@link StreamOperator} that wraps python {@link PythonFunction}.

streaming/java/streaming-api/src/main/java/io/ray/streaming/python/PythonPartition.java

@@ -1,6 +1,6 @@
-package org.ray.streaming.python;
+package io.ray.streaming.python;
 
-import org.ray.streaming.api.partition.Partition;
+import io.ray.streaming.api.partition.Partition;
 
 /**
  * Represents a python partition function.

streaming/java/streaming-api/src/main/java/io/ray/streaming/python/stream/PythonDataStream.java

@@ -1,11 +1,11 @@
-package org.ray.streaming.python.stream;
+package io.ray.streaming.python.stream;
 
-import org.ray.streaming.api.context.StreamingContext;
-import org.ray.streaming.api.stream.Stream;
-import org.ray.streaming.python.PythonFunction;
-import org.ray.streaming.python.PythonFunction.FunctionInterface;
-import org.ray.streaming.python.PythonOperator;
-import org.ray.streaming.python.PythonPartition;
+import io.ray.streaming.api.context.StreamingContext;
+import io.ray.streaming.api.stream.Stream;
+import io.ray.streaming.python.PythonFunction;
+import io.ray.streaming.python.PythonFunction.FunctionInterface;
+import io.ray.streaming.python.PythonOperator;
+import io.ray.streaming.python.PythonPartition;
 
 /**
  * Represents a stream of data whose transformations will be executed in python.

streaming/java/streaming-api/src/main/java/io/ray/streaming/python/stream/PythonKeyDataStream.java

@@ -1,9 +1,9 @@
-package org.ray.streaming.python.stream;
+package io.ray.streaming.python.stream;
 
-import org.ray.streaming.python.PythonFunction;
-import org.ray.streaming.python.PythonFunction.FunctionInterface;
-import org.ray.streaming.python.PythonOperator;
-import org.ray.streaming.python.PythonPartition;
+import io.ray.streaming.python.PythonFunction;
+import io.ray.streaming.python.PythonFunction.FunctionInterface;
+import io.ray.streaming.python.PythonOperator;
+import io.ray.streaming.python.PythonPartition;
 
 /**
  * Represents a python DataStream returned by a key-by operation.

streaming/java/streaming-api/src/main/java/io/ray/streaming/python/stream/PythonStream.java

@@ -1,4 +1,4 @@
-package org.ray.streaming.python.stream;
+package io.ray.streaming.python.stream;
 
 /**
  * A marker interface used to identify all python streams.

streaming/java/streaming-api/src/main/java/io/ray/streaming/python/stream/PythonStreamSink.java

@@ -1,7 +1,7 @@
-package org.ray.streaming.python.stream;
+package io.ray.streaming.python.stream;
 
-import org.ray.streaming.api.stream.StreamSink;
-import org.ray.streaming.python.PythonOperator;
+import io.ray.streaming.api.stream.StreamSink;
+import io.ray.streaming.python.PythonOperator;
 
 /**
  * Represents a sink of the PythonStream.

streaming/java/streaming-api/src/main/java/io/ray/streaming/python/stream/PythonStreamSource.java

@@ -1,11 +1,11 @@
-package org.ray.streaming.python.stream;
+package io.ray.streaming.python.stream;
 
-import org.ray.streaming.api.context.StreamingContext;
-import org.ray.streaming.api.stream.StreamSource;
-import org.ray.streaming.python.PythonFunction;
-import org.ray.streaming.python.PythonFunction.FunctionInterface;
-import org.ray.streaming.python.PythonOperator;
-import org.ray.streaming.python.PythonPartition;
+import io.ray.streaming.api.context.StreamingContext;
+import io.ray.streaming.api.stream.StreamSource;
+import io.ray.streaming.python.PythonFunction;
+import io.ray.streaming.python.PythonFunction.FunctionInterface;
+import io.ray.streaming.python.PythonOperator;
+import io.ray.streaming.python.PythonPartition;
 
 /**
  * Represents a source of the PythonStream.

streaming/java/streaming-api/src/main/java/io/ray/streaming/schedule/JobScheduler.java

@@ -1,8 +1,8 @@
-package org.ray.streaming.schedule;
+package io.ray.streaming.schedule;
 
 
+import io.ray.streaming.jobgraph.JobGraph;
 import java.util.Map;
-import org.ray.streaming.jobgraph.JobGraph;
 
 /**
  * Interface of the job scheduler.

streaming/java/streaming-api/src/main/java/io/ray/streaming/util/Config.java

@@ -1,4 +1,4 @@
-package org.ray.streaming.util;
+package io.ray.streaming.util;
 
 public class Config {
 

streaming/java/streaming-api/src/test/java/io/ray/streaming/jobgraph/JobGraphBuilderTest.java

@@ -1,13 +1,13 @@
-package org.ray.streaming.jobgraph;
+package io.ray.streaming.jobgraph;
 
 import com.google.common.collect.Lists;
+import io.ray.streaming.api.context.StreamingContext;
+import io.ray.streaming.api.partition.impl.KeyPartition;
+import io.ray.streaming.api.partition.impl.RoundRobinPartition;
+import io.ray.streaming.api.stream.DataStream;
+import io.ray.streaming.api.stream.DataStreamSource;
+import io.ray.streaming.api.stream.StreamSink;
 import java.util.List;
-import org.ray.streaming.api.context.StreamingContext;
-import org.ray.streaming.api.partition.impl.KeyPartition;
-import org.ray.streaming.api.partition.impl.RoundRobinPartition;
-import org.ray.streaming.api.stream.DataStream;
-import org.ray.streaming.api.stream.DataStreamSource;
-import org.ray.streaming.api.stream.StreamSink;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.testng.Assert;