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From chan...@apache.org
Subject [12/50] [abbrv] incubator-predictionio git commit: [PIO-107] Removal of examples under examples/experimental.
Date Wed, 27 Sep 2017 22:10:47 GMT
http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/data/movielens.txt
----------------------------------------------------------------------
diff --git a/examples/experimental/data/movielens.txt b/examples/experimental/data/movielens.txt
deleted file mode 100644
index f0eee19..0000000
--- a/examples/experimental/data/movielens.txt
+++ /dev/null
@@ -1,1501 +0,0 @@
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http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-helloworld/MyAlgorithm.java
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-helloworld/MyAlgorithm.java b/examples/experimental/java-local-helloworld/MyAlgorithm.java
deleted file mode 100644
index 08084aa..0000000
--- a/examples/experimental/java-local-helloworld/MyAlgorithm.java
+++ /dev/null
@@ -1,67 +0,0 @@
-/*
- * 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.sample.java.helloworld;
-
-import org.apache.predictionio.controller.java.*;
-
-import java.util.Map;
-import java.util.HashMap;
-
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-public class MyAlgorithm extends LJavaAlgorithm<
-  EmptyAlgorithmParams, MyTrainingData, MyModel, MyQuery, MyPredictedResult> {
-
-  final static Logger logger = LoggerFactory.getLogger(MyAlgorithm.class);
-
-  @Override
-  public MyModel train(MyTrainingData data) {
-    Map<String, Double> sumMap = new HashMap<String, Double>();
-    Map<String, Integer> countMap = new HashMap<String, Integer>();
-
-    // calculate sum and count for each day
-    for (MyTrainingData.DayTemperature temp : data.temperatures) {
-      Double sum = sumMap.get(temp.day);
-      Integer count = countMap.get(temp.day);
-      if (sum == null) {
-        sumMap.put(temp.day, temp.temperature);
-        countMap.put(temp.day, 1);
-      } else {
-        sumMap.put(temp.day, sum + temp.temperature);
-        countMap.put(temp.day, count + 1);
-      }
-    }
-
-    // calculate the average
-    Map<String, Double> averageMap = new HashMap<String, Double>();
-    for (Map.Entry<String, Double> entry : sumMap.entrySet()) {
-      String day = entry.getKey();
-      Double average = entry.getValue() / countMap.get(day);
-      averageMap.put(day, average);
-    }
-
-    return new MyModel(averageMap);
-  }
-
-  @Override
-  public MyPredictedResult predict(MyModel model, MyQuery query) {
-    Double temp = model.temperatures.get(query.day);
-    return  new MyPredictedResult(temp);
-  }
-}

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-helloworld/MyDataSource.java
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-helloworld/MyDataSource.java b/examples/experimental/java-local-helloworld/MyDataSource.java
deleted file mode 100644
index e942de0..0000000
--- a/examples/experimental/java-local-helloworld/MyDataSource.java
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- * 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.sample.java.helloworld;
-
-import org.apache.predictionio.controller.java.*;
-
-import java.util.List;
-import java.util.ArrayList;
-import java.io.FileReader;
-import java.io.BufferedReader;
-
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-public class MyDataSource extends LJavaDataSource<
-  EmptyDataSourceParams, EmptyDataParams, MyTrainingData, MyQuery, EmptyActualResult> {
-
-  final static Logger logger = LoggerFactory.getLogger(MyDataSource.class);
-
-  @Override
-  public MyTrainingData readTraining() {
-    List<MyTrainingData.DayTemperature> temperatures =
-      new ArrayList<MyTrainingData.DayTemperature>();
-
-    try {
-      BufferedReader reader = new BufferedReader(new FileReader("../data/helloworld/data.csv"));
-      String line;
-      while ((line = reader.readLine()) != null) {
-        String[] tokens = line.split(",");
-        temperatures.add(
-          new MyTrainingData.DayTemperature(tokens[0], Double.parseDouble(tokens[1])));
-      }
-      reader.close();
-    } catch (Exception e) {
-      logger.error("Caught Exception: " + e.getMessage());
-      System.exit(1);
-    }
-
-    return new MyTrainingData(temperatures);
-  }
-}

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-helloworld/MyEngineFactory.java
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-helloworld/MyEngineFactory.java b/examples/experimental/java-local-helloworld/MyEngineFactory.java
deleted file mode 100644
index 6c28cb6..0000000
--- a/examples/experimental/java-local-helloworld/MyEngineFactory.java
+++ /dev/null
@@ -1,34 +0,0 @@
-/*
- * 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.sample.java.helloworld;
-
-import org.apache.predictionio.controller.java.*;
-
-public class MyEngineFactory implements IJavaEngineFactory {
-  public JavaSimpleEngine<MyTrainingData, EmptyDataParams, MyQuery,
-    MyPredictedResult, EmptyActualResult> apply() {
-
-    return new JavaSimpleEngineBuilder<MyTrainingData, EmptyDataParams,
-      MyQuery, MyPredictedResult, EmptyActualResult> ()
-      .dataSourceClass(MyDataSource.class)
-      .preparatorClass() // Use default Preparator
-      .addAlgorithmClass("", MyAlgorithm.class)
-      .servingClass() // Use default Serving
-      .build();
-  }
-}

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-helloworld/MyModel.java
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-helloworld/MyModel.java b/examples/experimental/java-local-helloworld/MyModel.java
deleted file mode 100644
index 07ccd34..0000000
--- a/examples/experimental/java-local-helloworld/MyModel.java
+++ /dev/null
@@ -1,34 +0,0 @@
-/*
- * 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.sample.java.helloworld;
-
-import java.io.Serializable;
-import java.util.Map;
-
-public class MyModel implements Serializable {
-  Map<String, Double> temperatures;
-
-  public MyModel(Map<String, Double> temperatures) {
-    this.temperatures = temperatures;
-  }
-
-  @Override
-  public String toString() {
-    return temperatures.toString();
-  }
-}

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-helloworld/MyPredictedResult.java
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-helloworld/MyPredictedResult.java b/examples/experimental/java-local-helloworld/MyPredictedResult.java
deleted file mode 100644
index 129a5f9..0000000
--- a/examples/experimental/java-local-helloworld/MyPredictedResult.java
+++ /dev/null
@@ -1,28 +0,0 @@
-/*
- * 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.sample.java.helloworld;
-
-import java.io.Serializable;
-
-public class MyPredictedResult implements Serializable {
-  Double temperature;
-
-  public MyPredictedResult(Double temperature) {
-    this.temperature = temperature;
-  }
-}

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-helloworld/MyQuery.java
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-helloworld/MyQuery.java b/examples/experimental/java-local-helloworld/MyQuery.java
deleted file mode 100644
index d98e9dc..0000000
--- a/examples/experimental/java-local-helloworld/MyQuery.java
+++ /dev/null
@@ -1,28 +0,0 @@
-/*
- * 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.sample.java.helloworld;
-
-import java.io.Serializable;
-
-public class MyQuery implements Serializable {
-  String day;
-
-  public MyQuery(String day) {
-    this.day = day;
-  }
-}

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-helloworld/MyTrainingData.java
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-helloworld/MyTrainingData.java b/examples/experimental/java-local-helloworld/MyTrainingData.java
deleted file mode 100644
index adca58f..0000000
--- a/examples/experimental/java-local-helloworld/MyTrainingData.java
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- * 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.sample.java.helloworld;
-
-import java.io.Serializable;
-import java.util.List;
-
-public class MyTrainingData implements Serializable {
-  List<DayTemperature> temperatures;
-
-  public MyTrainingData(List<DayTemperature> temperatures) {
-    this.temperatures = temperatures;
-  }
-
-  public static class DayTemperature implements Serializable {
-    String day;
-    Double temperature;
-
-    public DayTemperature(String day, Double temperature) {
-      this.day = day;
-      this.temperature = temperature;
-    }
-  }
-}

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-helloworld/README.md
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-helloworld/README.md b/examples/experimental/java-local-helloworld/README.md
deleted file mode 100644
index 245ba35..0000000
--- a/examples/experimental/java-local-helloworld/README.md
+++ /dev/null
@@ -1,93 +0,0 @@
-<!--
-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.
--->
-
-# My First "Hello World" Engine
-
-```
-$ cd $PIO_HOME/examples/java-local-helloworld
-```
-
-Prepare training data:
-```
-$ cp ../data/helloworld/data1.csv ../data/helloworld/data.csv
-```
-
-Register engine:
-
-```
-$ ../../bin/pio build
-
-```
-
-Train:
-
-```
-$ ../../bin/pio train
-```
-
-Example output:
-
-```
-2014-08-11 14:29:35,877 INFO  APIDebugWorkflow$ - Metrics is null. Stop here
-2014-08-11 14:29:36,099 INFO  APIDebugWorkflow$ - Saved engine instance with ID: 201408110004
-```
-
-```
-$ ../../bin/pio deploy
-```
-
-Retrieve prediction:
-
-```
-$ curl -H "Content-Type: application/json" -d '{ "day": "Mon" }' http://localhost:8000/queries.json
-```
-
-Output:
-
-```
-{"temperature":75.5}
-```
-
-Retrieve prediction:
-
-```
-$ curl -H "Content-Type: application/json" -d '{ "day": "Tue" }' http://localhost:8000/queries.json
-```
-
-Output:
-```
-{"temperature":80.5}
-```
-
-
-Re-train with new data:
-
-```
-$ cd $PIO_HOME/examples/java-local-helloworld
-$ cp ../data/helloworld/data2.csv ../data/helloworld/data.csv
-```
-
-```
-$ ../../bin/pio train
-$ ../../bin/pio deploy
-```
-
-````
-$ curl -H "Content-Type: application/json" -d '{ "day": "Mon" }' http://localhost:8000/queries.json
-
-{"temperature":76.66666666666667}
-````

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-helloworld/build.sbt
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-helloworld/build.sbt b/examples/experimental/java-local-helloworld/build.sbt
deleted file mode 100644
index b246d7f..0000000
--- a/examples/experimental/java-local-helloworld/build.sbt
+++ /dev/null
@@ -1,28 +0,0 @@
-/*
- * 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.
- */
-
-import AssemblyKeys._
-
-assemblySettings
-
-name := "example-java-local-helloworld"
-
-organization := "org.sample"
-
-libraryDependencies ++= Seq(
-  "org.apache.predictionio" %% "core" % "0.9.1" % "provided",
-  "org.apache.spark" %% "spark-core" % "1.2.0" % "provided")

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-helloworld/engine.json
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-helloworld/engine.json b/examples/experimental/java-local-helloworld/engine.json
deleted file mode 100644
index a00e45b..0000000
--- a/examples/experimental/java-local-helloworld/engine.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-  "id": "org.sample.java.helloworld",
-  "description": "My Hello World Engine",
-  "engineFactory": "org.sample.java.helloworld.MyEngineFactory"
-}

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-helloworld/project/assembly.sbt
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-helloworld/project/assembly.sbt b/examples/experimental/java-local-helloworld/project/assembly.sbt
deleted file mode 100644
index 54c3252..0000000
--- a/examples/experimental/java-local-helloworld/project/assembly.sbt
+++ /dev/null
@@ -1 +0,0 @@
-addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.11.2")

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-regression/README.md
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-regression/README.md b/examples/experimental/java-local-regression/README.md
deleted file mode 100644
index ebf45ab..0000000
--- a/examples/experimental/java-local-regression/README.md
+++ /dev/null
@@ -1,96 +0,0 @@
-<!--
-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.
--->
-
-# Java Local Regression Engine
-
-## Configuration
-
-### Data Source
-
-This sample regression engine reads data from file system.
-
-Edit the file path in `engine.json`, change `filepath` of `datasource` to an absolute path that points to
-[lr_data.py](../data/lr_data.txt)
-
-```
-$ cat engine.json
-...
-"datasource": {
-  "filepath": <absolute_path_to_lr_data.txt>
-}
-...
-
-```
-
-### Algorithms
-
-This engine comes with two algorithms.
-
-1. OLS. It is the standard ordinary least square algorithm. It takes no parameter.
-2. Default. This algorithm always return the same value `v` defined in the parameter.
-
-Below is an example of `algorithms` defines in `engine.json`, it invokes three algorithms,
-
-1. The standard OLS algorithm,
-2. A default algorithm which always return 2.0,
-3. A default algorithm which always return 4.0.
-
-```json
-"algorithms": [
-  { "name": "OLS", "params": {} },
-  { "name": "Default", "params": { "v": 2.0 } },
-  { "name": "Default", "params": { "v": 4.0 } }
-]
-```
-
-The `Serving` class returns the average of all these prediction to the user.
-
-## Register engine, train, and deploy.
-
-```
-$ pio build
-$ pio train
-$ pio deploy --port 9997
-```
-
-## Query the Engine Instance
-
-```
-$ curl -X POST http://localhost:9997/queries.json -d \
-  '[1.80,0.87,2.41,0.35,-0.21,1.35,0.51,1.55,-0.20,1.32]'
-2.2434392991944025
-```
-
-2.24... is the prediction result.
-
-## Evaluation
-
-You can evaluate the engine instance too.
-```
-$  pio eval --batch JavaRegressionEval \
---metrics-class org.apache.predictionio.examples.java.regression.MeanSquareMetrics
-
-...
-2014-09-24 03:23:07,170 INFO  spark.SparkContext - Job finished: collect at Workflow.scala:695, took 0.092829 s
-2014-09-24 03:23:07,284 WARN  workflow.CoreWorkflow$ - java.lang.String is not a NiceRendering instance.
-2014-09-24 03:23:07,296 INFO  workflow.CoreWorkflow$ - Saved engine instance with ID: OCCUucs7QBOOG--9kIWFEw
-```
-
-And you will see you result in PredictionIO dashboard. To start dashboard:
-```
-$ pio dashboard
-```

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-regression/build.sbt
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-regression/build.sbt b/examples/experimental/java-local-regression/build.sbt
deleted file mode 100644
index 92d7416..0000000
--- a/examples/experimental/java-local-regression/build.sbt
+++ /dev/null
@@ -1,30 +0,0 @@
-/*
- * 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.
- */
-
-import AssemblyKeys._
-
-assemblySettings
-
-name := "java-local-regression"
-
-organization := "myorg"
-
-version := "0.0.1-SNAPSHOT"
-
-libraryDependencies ++= Seq(
-  "org.apache.predictionio"    %% "core"          % "0.9.1" % "provided",
-  "org.apache.spark" %% "spark-core"    % "1.2.0" % "provided")

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-regression/engine.json
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-regression/engine.json b/examples/experimental/java-local-regression/engine.json
deleted file mode 100644
index a80ef7d..0000000
--- a/examples/experimental/java-local-regression/engine.json
+++ /dev/null
@@ -1,33 +0,0 @@
-{
-  "id": "java-local-regression",
-  "description": "java-local-regression",
-  "engineFactory": "org.apache.predictionio.examples.java.regression.EngineFactory",
-  "datasource": {
-    "params": {
-      "filepath": "PATH-TO-lr_data.txt"
-    }
-  },
-  "preparator": {
-    "params": {
-      "r": 0.8
-    }
-  },
-  "algorithms": [
-    {
-      "name": "OLS",
-      "params": {}
-    },
-    {
-      "name": "Default",
-      "params": {
-        "v": 2.0
-      }
-    },
-    {
-      "name": "Default",
-      "params": {
-        "v": 4.0
-      }
-    }
-  ]
-}

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-regression/project/assembly.sbt
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-regression/project/assembly.sbt b/examples/experimental/java-local-regression/project/assembly.sbt
deleted file mode 100644
index 54c3252..0000000
--- a/examples/experimental/java-local-regression/project/assembly.sbt
+++ /dev/null
@@ -1 +0,0 @@
-addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.11.2")

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-regression/src/main/java/DataSource.java
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-regression/src/main/java/DataSource.java b/examples/experimental/java-local-regression/src/main/java/DataSource.java
deleted file mode 100644
index 62be375..0000000
--- a/examples/experimental/java-local-regression/src/main/java/DataSource.java
+++ /dev/null
@@ -1,90 +0,0 @@
-/*
- * 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.predictionio.examples.java.regression;
-
-import org.apache.predictionio.controller.java.LJavaDataSource;
-
-import scala.Tuple2;
-import scala.Tuple3;
-
-import java.io.IOException;
-import java.lang.Iterable;
-import java.nio.charset.StandardCharsets;
-import java.nio.file.Files;
-import java.nio.file.Paths;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-import java.util.regex.Pattern;
-
-public class DataSource
-  extends LJavaDataSource<DataSourceParams, Integer, TrainingData, Double[], Double> {
-
-  private static final Pattern SPACE = Pattern.compile(" ");
-
-  public final DataSourceParams dsp;
-
-  public DataSource(DataSourceParams dsp) {
-    this.dsp = dsp;
-  }
-
-  public List<Tuple3<Integer, TrainingData, Iterable<Tuple2<Double[], Double>>>> read() {
- 
-    List<String> lines;
-    try {
-      lines = Files.readAllLines(Paths.get(dsp.filepath), StandardCharsets.UTF_8);
-    } catch (IOException exception) {
-      System.out.println("Cannot read file");
-      lines = new ArrayList<String>();
-    }
-
-    int n = lines.size();
-
-    int featureCount = SPACE.split(lines.get(0)).length - 1;
-
-    Double[][] x = new Double[n][featureCount]; 
-    Double[] y = new Double[n];
-
-    for (int i = 0; i < n; i++) {
-      String[] line = SPACE.split(lines.get(i), 2);
-      y[i] = Double.parseDouble(line[0]);
-
-      String[] featureStrs = SPACE.split(line[1]);
-
-      for (int j = 0; j < featureCount; j++) {
-        x[i][j] = Double.parseDouble(featureStrs[j]);
-      }
-    }
-
-    TrainingData td = new TrainingData(x, y);
-
-    List<Tuple2<Double[], Double>> faList = new ArrayList<>();
-
-    for (int i = 0; i < 10; i++) {
-      faList.add(new Tuple2<Double[], Double>(x[i], y[i]));
-    }
-
-    List<Tuple3<Integer, TrainingData, Iterable<Tuple2<Double[], Double>>>> results = 
-      new ArrayList <> ();
-
-    results.add(new Tuple3<Integer, TrainingData, Iterable<Tuple2<Double[], Double>>>(
-      new Integer(0), td, faList));
-
-    return results;
-  }
-}

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-regression/src/main/java/DataSourceParams.java
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-regression/src/main/java/DataSourceParams.java b/examples/experimental/java-local-regression/src/main/java/DataSourceParams.java
deleted file mode 100644
index 1afc919..0000000
--- a/examples/experimental/java-local-regression/src/main/java/DataSourceParams.java
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
- * 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.predictionio.examples.java.regression;
-
-import org.apache.predictionio.controller.java.JavaParams;
-
-public class DataSourceParams implements JavaParams {
-  public final String filepath;
-  public DataSourceParams(String filepath) {
-    this.filepath = filepath;
-  }
-}

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-regression/src/main/java/DefaultAlgorithm.java
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-regression/src/main/java/DefaultAlgorithm.java b/examples/experimental/java-local-regression/src/main/java/DefaultAlgorithm.java
deleted file mode 100644
index 055e5e6..0000000
--- a/examples/experimental/java-local-regression/src/main/java/DefaultAlgorithm.java
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- * 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.predictionio.examples.java.regression;
-
-import org.apache.predictionio.controller.java.LJavaAlgorithm;
-
-// This algorithm is for illustration only. It returns a constant.
-public class DefaultAlgorithm
-  extends LJavaAlgorithm<DefaultAlgorithmParams, TrainingData, Object, Double[], Double> {
-  public final DefaultAlgorithmParams p; 
-
-  public DefaultAlgorithm(DefaultAlgorithmParams p) {
-    this.p = p;
-  }
-
-  public Object train(TrainingData data) {
-    return null;
-  }
-
-  public Double predict(Object nullModel, Double[] query) {
-    return p.v;
-  }
-}
-

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-regression/src/main/java/DefaultAlgorithmParams.java
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-regression/src/main/java/DefaultAlgorithmParams.java b/examples/experimental/java-local-regression/src/main/java/DefaultAlgorithmParams.java
deleted file mode 100644
index 28aba37..0000000
--- a/examples/experimental/java-local-regression/src/main/java/DefaultAlgorithmParams.java
+++ /dev/null
@@ -1,34 +0,0 @@
-/*
- * 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.predictionio.examples.java.regression;
-
-import org.apache.predictionio.controller.java.JavaParams;
-
-public class DefaultAlgorithmParams implements JavaParams {
-  public final double v;
-  public DefaultAlgorithmParams(double v) {
-    this.v = v;
-  }
-
-  @Override
-  public String toString() {
-    return "DefaultAlgorithmParams (k=" + this.v + ")";
-  }
-}
-
-

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-regression/src/main/java/EngineFactory.java
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-regression/src/main/java/EngineFactory.java b/examples/experimental/java-local-regression/src/main/java/EngineFactory.java
deleted file mode 100644
index 1fe03f3..0000000
--- a/examples/experimental/java-local-regression/src/main/java/EngineFactory.java
+++ /dev/null
@@ -1,34 +0,0 @@
-/*
- * 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.predictionio.examples.java.regression;
-
-import org.apache.predictionio.controller.java.IJavaEngineFactory;
-import org.apache.predictionio.controller.java.JavaEngine;
-import org.apache.predictionio.controller.java.JavaEngineBuilder;
-
-public class EngineFactory implements IJavaEngineFactory {
-  public JavaEngine<TrainingData, Integer, TrainingData, Double[], Double, Double> apply() {
-    return new JavaEngineBuilder<TrainingData, Integer, TrainingData, Double[], Double, Double> ()
-      .dataSourceClass(DataSource.class)
-      .preparatorClass(Preparator.class)
-      .addAlgorithmClass("OLS", OLSAlgorithm.class)
-      .addAlgorithmClass("Default", DefaultAlgorithm.class)
-      .servingClass(Serving.class)
-      .build();
-  }
-}

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-regression/src/main/java/MeanSquareEvaluator.java
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-regression/src/main/java/MeanSquareEvaluator.java b/examples/experimental/java-local-regression/src/main/java/MeanSquareEvaluator.java
deleted file mode 100644
index 13577e7..0000000
--- a/examples/experimental/java-local-regression/src/main/java/MeanSquareEvaluator.java
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * 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.predictionio.examples.java.regression;
-
-import org.apache.predictionio.controller.java.JavaEvaluator;
-import java.lang.Iterable;
-import org.apache.predictionio.controller.java.EmptyParams;
-import scala.Tuple2;
-import java.util.List;
-import java.util.ArrayList;
-
-
-public class MeanSquareEvaluator
-  extends JavaEvaluator<EmptyParams, Integer,
-          Double[], Double, Double, Double, Double, String> {
-
-  public Double evaluateUnit(Double[] query, Double prediction, Double actual) {
-    return (prediction - actual) * (prediction - actual);
-  }
-
-  public Double evaluateSet(Integer dp, Iterable<Double> mseSeq) {
-    double mse = 0.0;
-    int n = 0;
-    for (Double e: mseSeq) {
-      mse += e;
-      n += 1;
-    }
-    return mse / n;
-  }
-
-  public String evaluateAll(Iterable<Tuple2<Integer, Double>> input) {
-    List<String> l = new ArrayList<String>();
-    for (Tuple2<Integer, Double> t : input) {
-      l.add("MSE: " + t._2().toString());
-    }
-    return l.toString();
-  }
-}

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-regression/src/main/java/OLSAlgorithm.java
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-regression/src/main/java/OLSAlgorithm.java b/examples/experimental/java-local-regression/src/main/java/OLSAlgorithm.java
deleted file mode 100644
index 6ed38f6..0000000
--- a/examples/experimental/java-local-regression/src/main/java/OLSAlgorithm.java
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- * 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.predictionio.examples.java.regression;
-
-import org.apache.commons.math3.stat.regression.OLSMultipleLinearRegression;
-import org.apache.commons.math3.linear.RealVector;
-import java.util.Arrays;
-import org.apache.predictionio.controller.java.EmptyParams;
-
-import org.apache.predictionio.controller.java.LJavaAlgorithm;
-
-public class OLSAlgorithm
-  extends LJavaAlgorithm<EmptyParams, TrainingData, Double[], Double[], Double> {
-
-  public Double[] train(TrainingData data) {
-    OLSMultipleLinearRegression r = new OLSMultipleLinearRegression();
-    // Convert Double[][] to double[][]
-    double[][] x = new double[data.r][data.c];
-    double[] y = new double[data.r];
-
-    for (int i=0; i<data.r; i++) {
-      for (int j=0; j<data.c; j++) {
-        x[i][j] = data.x[i][j].doubleValue();
-      }
-      y[i] = data.y[i].doubleValue();
-    }
-
-    r.newSampleData(y, x);
-    // Fixme. Add intercept
-    double[] p = r.estimateRegressionParameters();
-    Double[] pp = new Double[data.c];
-    for (int j=0; j<data.c; j++) {
-      pp[j] = p[j];
-    }
-    System.out.println("Regression Algo: " + Arrays.toString(pp));
-    return pp;
-  }
-
-  public Double predict(Double[] model, Double[] query) {
-    double dotProduct = 0.0;
-    for (int i = 0; i < model.length; i++) {
-      dotProduct += model[i] * query[i];
-    }
-    return dotProduct;
-  }
-}

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-regression/src/main/java/Preparator.java
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-regression/src/main/java/Preparator.java b/examples/experimental/java-local-regression/src/main/java/Preparator.java
deleted file mode 100644
index f4d46c1..0000000
--- a/examples/experimental/java-local-regression/src/main/java/Preparator.java
+++ /dev/null
@@ -1,43 +0,0 @@
-/*
- * 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.predictionio.examples.java.regression;
-
-import org.apache.predictionio.controller.java.LJavaPreparator;
-
-// This Preparator is just a proof-of-concept. It removes a fraction of the
-// training data to make training more "efficient".
-public class Preparator extends LJavaPreparator<PreparatorParams, TrainingData, TrainingData> {
-  private PreparatorParams pp;
-  public Preparator(PreparatorParams pp) {
-    this.pp = pp;
-  }
-
-  public TrainingData prepare(TrainingData td) {
-    int n = (int) (td.r * pp.r);
-
-    Double[][] x = new Double[n][td.c];
-    Double[] y = new Double[n];
-    for (int i=0; i<n; i++) {
-      for (int j=0; j<td.c; j++) {
-        x[i][j] = td.x[i][j];
-      }
-      y[i] = td.y[i];
-    }
-    return new TrainingData(x, y);
-  }
-}

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-regression/src/main/java/PreparatorParams.java
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-regression/src/main/java/PreparatorParams.java b/examples/experimental/java-local-regression/src/main/java/PreparatorParams.java
deleted file mode 100644
index e4f45fb..0000000
--- a/examples/experimental/java-local-regression/src/main/java/PreparatorParams.java
+++ /dev/null
@@ -1,30 +0,0 @@
-/*
- * 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.predictionio.examples.java.regression;
-
-import org.apache.predictionio.controller.java.JavaParams;
-
-public class PreparatorParams implements JavaParams {
-  // Take the r-fraction of data in training.
-  public double r = 1.0;
-  public PreparatorParams(double r) {
-    this.r = r;
-  }
-}
-
-

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-regression/src/main/java/Run.java
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-regression/src/main/java/Run.java b/examples/experimental/java-local-regression/src/main/java/Run.java
deleted file mode 100644
index 76601f4..0000000
--- a/examples/experimental/java-local-regression/src/main/java/Run.java
+++ /dev/null
@@ -1,94 +0,0 @@
-/*
- * 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.predictionio.examples.java.regression;
-
-import org.apache.predictionio.controller.java.EmptyParams;
-import org.apache.predictionio.controller.java.IJavaEngineFactory;
-import org.apache.predictionio.controller.java.JavaParams;
-import org.apache.predictionio.controller.java.JavaEngine;
-import org.apache.predictionio.controller.java.JavaEngineBuilder;
-import org.apache.predictionio.controller.java.JavaEngineParams;
-import org.apache.predictionio.controller.java.JavaEngineParamsBuilder;
-import org.apache.predictionio.controller.java.LJavaAlgorithm;
-import org.apache.predictionio.controller.java.JavaWorkflow;
-import org.apache.predictionio.controller.java.WorkflowParamsBuilder;
-import java.io.File;
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import scala.Tuple2;
-
-public class Run {
-  // During development, one can build a semi-engine, only add the first few layers. In this
-  // particular example, we only add until Algorithm Layer.
-  private static class HalfBakedEngineFactory implements IJavaEngineFactory {
-    public JavaEngine<TrainingData, Integer, TrainingData, Double[], Double, Double> apply() {
-      return new JavaEngineBuilder<TrainingData, Integer, TrainingData, Double[], Double, Double> ()
-        .dataSourceClass(DataSource.class)
-        .preparatorClass(Preparator.class)
-        .addAlgorithmClass("OLS", OLSAlgorithm.class)
-        .addAlgorithmClass("Default", DefaultAlgorithm.class)
-        .build();
-    }
-  }
-
-  public static void runComponents() throws IOException {
-    JavaEngineParams engineParams = new JavaEngineParamsBuilder()
-      .dataSourceParams(new DataSourceParams(new File("../data/lr_data.txt").getCanonicalPath()))
-      .preparatorParams(new PreparatorParams(0.3))
-      .addAlgorithmParams("OLS", new EmptyParams())
-      .addAlgorithmParams("Default", new DefaultAlgorithmParams(0.2))
-      .addAlgorithmParams("Default", new DefaultAlgorithmParams(0.4))
-      .build();
-
-    JavaWorkflow.runEngine(
-        (new HalfBakedEngineFactory()).apply(),
-        engineParams,
-        new WorkflowParamsBuilder().batch("java regression engine").verbose(3).build()
-        );
-  }
-
-  public static void runEngine() throws IOException {
-    JavaEngineParams engineParams = new JavaEngineParamsBuilder()
-      .dataSourceParams(new DataSourceParams(new File("../data/lr_data.txt").getCanonicalPath()))
-      .preparatorParams(new PreparatorParams(0.3))
-      .addAlgorithmParams("OLS", new EmptyParams())
-      .addAlgorithmParams("Default", new DefaultAlgorithmParams(0.2))
-      .addAlgorithmParams("Default", new DefaultAlgorithmParams(0.4))
-      .build();
-
-    JavaWorkflow.runEngine(
-        (new EngineFactory()).apply(),
-        engineParams,
-        MeanSquareEvaluator.class,
-        new EmptyParams(),
-        new WorkflowParamsBuilder().batch("java regression engine").verbose(3).build()
-        );
-  }
-
-  public static void main(String[] args) {
-    try {
-      runEngine();
-      //runComponents();
-    } catch (IOException ex) {
-      System.out.println(ex);
-    }
-  }
-}

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-regression/src/main/java/Serving.java
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-regression/src/main/java/Serving.java b/examples/experimental/java-local-regression/src/main/java/Serving.java
deleted file mode 100644
index 24ad092..0000000
--- a/examples/experimental/java-local-regression/src/main/java/Serving.java
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * 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.predictionio.examples.java.regression;
-
-import org.apache.predictionio.controller.java.LJavaServing;
-import org.apache.predictionio.controller.java.EmptyParams;
-
-import java.lang.Iterable;
-
-public class Serving extends LJavaServing<EmptyParams, Double[], Double> {
-  public Double serve(Double[] query, Iterable<Double> predictions) {
-    int n = 0;
-    double s = 0.0;
-    for (Double d: predictions) {
-      n += 1;
-      s += d;
-    }
-    return s / n;
-  }
-}

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-regression/src/main/java/TrainingData.java
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-regression/src/main/java/TrainingData.java b/examples/experimental/java-local-regression/src/main/java/TrainingData.java
deleted file mode 100644
index c59d0d7..0000000
--- a/examples/experimental/java-local-regression/src/main/java/TrainingData.java
+++ /dev/null
@@ -1,37 +0,0 @@
-/*
- * 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.predictionio.examples.java.regression;
-
-import java.io.Serializable;
-import java.util.Arrays;
-
-public class TrainingData implements Serializable {
-  public final Double[][] x;
-  public final Double[] y;
-  public final int r;
-  public final int c;
-  public TrainingData(Double[][] x, Double[] y) {
-    this.x = x;
-    this.y = y;
-    this.r = x.length;
-    this.c = x[0].length;
-  }
-  @Override public String toString() {
-    return "TrainingData: r=" + this.r + ",c=" + this.c;
-  }
-}

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-regression/src/main/java/examples/algorithmsParams.json
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-regression/src/main/java/examples/algorithmsParams.json b/examples/experimental/java-local-regression/src/main/java/examples/algorithmsParams.json
deleted file mode 100644
index e376f2e..0000000
--- a/examples/experimental/java-local-regression/src/main/java/examples/algorithmsParams.json
+++ /dev/null
@@ -1,5 +0,0 @@
-[
-  {"name": "OLS", "params": {}},
-  {"name": "Default", "params": {"v": 0.2}},
-  {"name": "Default", "params": {"v": 0.4}}
-]

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-regression/src/main/java/examples/dataSourceParams.json
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-regression/src/main/java/examples/dataSourceParams.json b/examples/experimental/java-local-regression/src/main/java/examples/dataSourceParams.json
deleted file mode 100644
index 8d87c56..0000000
--- a/examples/experimental/java-local-regression/src/main/java/examples/dataSourceParams.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "filepath": "data/lr_data.txt"
-}

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-regression/src/main/java/examples/manifest.json
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-regression/src/main/java/examples/manifest.json b/examples/experimental/java-local-regression/src/main/java/examples/manifest.json
deleted file mode 100644
index 191de43..0000000
--- a/examples/experimental/java-local-regression/src/main/java/examples/manifest.json
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-  "id": "org.apache.predictionio.examples.java.regression",
-  "version": "0.8.1-SNAPSHOT",
-  "name": "Apache Java Regression Engine",
-  "engineFactory": "org.apache.predictionio.examples.java.regression.EngineFactory"
-}

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-regression/src/main/java/examples/preparatorParams.json
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-regression/src/main/java/examples/preparatorParams.json b/examples/experimental/java-local-regression/src/main/java/examples/preparatorParams.json
deleted file mode 100644
index f5ac299..0000000
--- a/examples/experimental/java-local-regression/src/main/java/examples/preparatorParams.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "r": 0.3
-}

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-tutorial/README.md
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-tutorial/README.md b/examples/experimental/java-local-tutorial/README.md
deleted file mode 100644
index 478fa8e..0000000
--- a/examples/experimental/java-local-tutorial/README.md
+++ /dev/null
@@ -1,29 +0,0 @@
-<!--
-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.
--->
-
-## TODO: update with new engine.json format and CLI! (updates pending)
-
-## Download Data from GroupLens
-
-Execute the following command to download MovieLens 100k to data/ml-100k/.
-```
-$ ./fetch.sh
-```
-
-## Tutorials
-
-The purpose of this tutorial is to help you to get familiar with each components of the PredictionIO framework. It can be found in `docs/manual/tutorials/enginebuilders/stepbystep`.

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-tutorial/build.sbt
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-tutorial/build.sbt b/examples/experimental/java-local-tutorial/build.sbt
deleted file mode 100644
index 077fa0c..0000000
--- a/examples/experimental/java-local-tutorial/build.sbt
+++ /dev/null
@@ -1,32 +0,0 @@
-/*
- * 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.
- */
-
-import AssemblyKeys._
-
-assemblySettings
-
-name := "java-local-tutorial"
-
-organization := "org.apache.predictionio"
-
-version := "0.9.1"
-
-libraryDependencies ++= Seq(
-  "org.apache.predictionio"    %% "core"          % "0.9.1" % "provided",
-  "org.apache.predictionio"    %% "engines"       % "0.9.1" % "provided",
-  "org.apache.mahout" % "mahout-core"   % "0.9",
-  "org.apache.spark" %% "spark-core"    % "1.2.0" % "provided")

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-tutorial/data/test/ratings.csv
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-tutorial/data/test/ratings.csv b/examples/experimental/java-local-tutorial/data/test/ratings.csv
deleted file mode 100644
index 126ba55..0000000
--- a/examples/experimental/java-local-tutorial/data/test/ratings.csv
+++ /dev/null
@@ -1,11 +0,0 @@
-1,1,2
-1,2,3
-1,3,4
-2,3,4
-2,4,1
-3,2,2
-3,3,1
-3,4,3
-4,1,5
-4,2,3
-4,4,2

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-tutorial/fetch.sh
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-tutorial/fetch.sh b/examples/experimental/java-local-tutorial/fetch.sh
deleted file mode 100755
index fc42dd4..0000000
--- a/examples/experimental/java-local-tutorial/fetch.sh
+++ /dev/null
@@ -1,31 +0,0 @@
-#!/bin/bash
-
-#
-# 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.
-#
-
-set -e
-
-TARGET_BASE_DIR="data"
-
-mkdir -p $TARGET_BASE_DIR
-curl http://files.grouplens.org/papers/ml-100k.zip -o $TARGET_BASE_DIR/ml-100k.zip
-cd $TARGET_BASE_DIR
-unzip ml-100k.zip
-
-echo "Data dir: ${TARGET_BASE_DIR}/ml-100k/"
-
-

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-tutorial/project/assembly.sbt
----------------------------------------------------------------------
diff --git a/examples/experimental/java-local-tutorial/project/assembly.sbt b/examples/experimental/java-local-tutorial/project/assembly.sbt
deleted file mode 100644
index 54c3252..0000000
--- a/examples/experimental/java-local-tutorial/project/assembly.sbt
+++ /dev/null
@@ -1 +0,0 @@
-addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.11.2")

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-tutorial/src/main/java/recommendations/.gitignore
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diff --git a/examples/experimental/java-local-tutorial/src/main/java/recommendations/.gitignore b/examples/experimental/java-local-tutorial/src/main/java/recommendations/.gitignore
deleted file mode 100644
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--- a/examples/experimental/java-local-tutorial/src/main/java/recommendations/.gitignore
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@@ -1 +0,0 @@
-testdata/ml-100k/

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-tutorial/src/main/java/recommendations/tutorial1/AlgoParams.java
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diff --git a/examples/experimental/java-local-tutorial/src/main/java/recommendations/tutorial1/AlgoParams.java b/examples/experimental/java-local-tutorial/src/main/java/recommendations/tutorial1/AlgoParams.java
deleted file mode 100644
index 05ad8b4..0000000
--- a/examples/experimental/java-local-tutorial/src/main/java/recommendations/tutorial1/AlgoParams.java
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@@ -1,28 +0,0 @@
-/*
- * 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.predictionio.examples.java.recommendations.tutorial1;
-
-import org.apache.predictionio.controller.java.JavaParams;
-
-public class AlgoParams implements JavaParams {
-  public double threshold;
-
-  public AlgoParams(double threshold) {
-    this.threshold = threshold;
-  }
-}

http://git-wip-us.apache.org/repos/asf/incubator-predictionio/blob/dec9f84c/examples/experimental/java-local-tutorial/src/main/java/recommendations/tutorial1/Algorithm.java
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diff --git a/examples/experimental/java-local-tutorial/src/main/java/recommendations/tutorial1/Algorithm.java b/examples/experimental/java-local-tutorial/src/main/java/recommendations/tutorial1/Algorithm.java
deleted file mode 100644
index c2be789..0000000
--- a/examples/experimental/java-local-tutorial/src/main/java/recommendations/tutorial1/Algorithm.java
+++ /dev/null
@@ -1,215 +0,0 @@
-/*
- * 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.predictionio.examples.java.recommendations.tutorial1;
-
-import org.apache.predictionio.controller.java.LJavaAlgorithm;
-import org.apache.commons.math3.linear.RealVector;
-import org.apache.commons.math3.linear.ArrayRealVector;
-import org.apache.commons.math3.linear.OpenMapRealVector;
-import scala.Tuple2;
-import java.util.Map;
-import java.util.HashMap;
-import java.util.List;
-import java.util.ArrayList;
-import java.util.Iterator;
-import java.util.Queue;
-import java.util.PriorityQueue;
-import java.util.Comparator;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-public class Algorithm extends
-  LJavaAlgorithm<AlgoParams, TrainingData, Model, Query, Float> {
-
-  final static Logger logger = LoggerFactory.getLogger(Algorithm.class);
-
-  AlgoParams params;
-
-  public Algorithm(AlgoParams params) {
-    this.params = params;
-  }
-
-  @Override
-  public Model train(TrainingData data) {
-    // pre-process
-    Map<Integer, Map<Integer, Float>> itemMap = new HashMap<Integer, Map<Integer, Float>>();
-    Map<Integer, Integer> userIndexMap = new HashMap<Integer, Integer>();
-    Map<Integer, Integer> itemIndexMap = new HashMap<Integer, Integer>();
-
-    int itemIndex = 0;
-    int userIndex = 0;
-    for (TrainingData.Rating r : data.ratings) {
-      Map<Integer, Float> userRating = itemMap.get(r.iid);
-      if (userRating == null) {
-        // new item
-        userRating = new HashMap<Integer, Float>();
-        itemMap.put(r.iid, userRating);
-        itemIndexMap.put(r.iid, itemIndex);
-        itemIndex += 1; // increment item index for next item
-      }
-      userRating.put(r.uid, r.rating);
-
-      // update user index
-      Integer u = userIndexMap.get(r.uid);
-      if (u == null) {
-        // new user
-        userIndexMap.put(r.uid, userIndex);
-        userIndex += 1;
-      }
-    }
-
-    int numOfItems = itemIndexMap.size();
-    int numOfUsers = userIndexMap.size();
-
-    Map<Integer, RealVector> itemVectors = new HashMap<Integer, RealVector>();
-    Map<Integer, RealVector> userHistory = new HashMap<Integer, RealVector>();
-
-    for (Map.Entry<Integer, Map<Integer, Float>> entry : itemMap.entrySet()) {
-      Integer itemID = entry.getKey();
-      Integer iindex = itemIndexMap.get(itemID);
-      Map<Integer, Float> userRatingMap = entry.getValue();
-      RealVector item = new ArrayRealVector(numOfUsers); // dimension is numOfUsers
-      for (Map.Entry<Integer, Float> r : userRatingMap.entrySet()) {
-        Integer userID = r.getKey();
-        Float rating = r.getValue();
-        Integer uindex = userIndexMap.get(userID);
-        item.setEntry(uindex, rating);
-        // update user History
-        RealVector user = userHistory.get(userID);
-        if (user == null) {
-          user = new OpenMapRealVector(numOfItems);
-          userHistory.put(userID, user);
-        }
-        user.setEntry(iindex, rating);
-      }
-      itemVectors.put(itemID, item);
-    }
-
-    // calculate sim
-
-    Map<Integer, RealVector> itemSimilarity = new HashMap<Integer, RealVector>();
-    List<Integer> item1List = new ArrayList<Integer>(itemIndexMap.keySet());
-    List<Integer> item2List = new ArrayList<Integer>(item1List);
-
-    int numSimilarItems = 100;
-    Comparator<IndexAndScore> comparator = new IndexAndScoreComparator();
-    Map<Integer, Queue<IndexAndScore>> topItemSimilarity =
-      new HashMap<Integer, Queue<IndexAndScore>>();
-
-    for (Integer itemID1 : item1List) {
-      item2List.remove(0);
-      Integer index1 = itemIndexMap.get(itemID1);
-      for (Integer itemID2: item2List) {
-        RealVector vector1 = itemVectors.get(itemID1);
-        RealVector vector2 = itemVectors.get(itemID2);
-        double score = vector1.cosine(vector2);
-        if (score > params.threshold) {
-          Integer index2 = itemIndexMap.get(itemID2);
-          setTopItemSimilarity(topItemSimilarity, itemID1, index2, score, numSimilarItems,
-            comparator);
-          setTopItemSimilarity(topItemSimilarity, itemID2, index1, score, numSimilarItems,
-            comparator);
-        }
-      }
-    }
-
-    for (Map.Entry<Integer, Queue<IndexAndScore>> entry : topItemSimilarity.entrySet()) {
-      Iterator<IndexAndScore> it = entry.getValue().iterator();
-      RealVector vector = new OpenMapRealVector(numOfItems);
-      while (it.hasNext()) {
-        IndexAndScore d = it.next();
-        vector.setEntry(d.index, d.score);
-      }
-      itemSimilarity.put(entry.getKey(), vector);
-    }
-
-    return new Model(itemSimilarity, userHistory);
-  }
-
-  private class IndexAndScore {
-    int index;
-    double score;
-    public IndexAndScore(int index, double score) {
-      this.index = index;
-      this.score = score;
-    }
-  }
-
-  private class IndexAndScoreComparator implements Comparator<IndexAndScore> {
-    @Override
-    public int compare(IndexAndScore o1, IndexAndScore o2) {
-      int r = 0;
-      if (o1.score < o2.score)
-        r = -1;
-      else if (o1.score > o2.score)
-        r = 1;
-      return r;
-    }
-  }
-
-  private void setTopItemSimilarity(Map<Integer, Queue<IndexAndScore>> topItemSimilarity,
-    Integer itemID1, Integer index2, double score, int capacity,
-    Comparator<IndexAndScore> comparator) {
-    Queue<IndexAndScore> queue = topItemSimilarity.get(itemID1);
-    if (queue == null) {
-      queue = new PriorityQueue<IndexAndScore>(capacity, comparator);
-      topItemSimilarity.put(itemID1, queue);
-    }
-    IndexAndScore entry = new IndexAndScore(index2, score);
-    if (queue.size() < capacity)
-      queue.add(entry);
-    else if (comparator.compare(queue.peek(), entry) < 0) {
-      queue.poll();
-      queue.add(entry);
-    }
-  }
-
-  @Override
-  public Float predict(Model model, Query query) {
-    RealVector itemVector = model.itemSimilarity.get(query.iid);
-    RealVector userVector = model.userHistory.get(query.uid);
-    if (itemVector == null) {
-      // cold start item, can't be handled by this algo, return hard code value.
-      return Float.NaN;
-    } else if (userVector == null) {
-      // new user, can't be handled by this algo, return hard code value.
-      return Float.NaN;
-    } else {
-      //logger.info("(" + query.uid + "," + query.iid + ")");
-      //logger.info(itemVector.toString());
-      //logger.info(userVector.toString());
-      double accum = 0.0;
-      double accumSim = 0.0;
-      for (int i = 0; i < itemVector.getDimension(); i++) {
-        double weight = itemVector.getEntry(i);
-        double rating = userVector.getEntry(i);
-        if ((weight != 0) && (rating != 0)) {
-          accum += weight * rating;
-          accumSim += Math.abs(weight);
-        }
-      }
-
-      if (accumSim == 0.0) {
-        return Float.NaN;
-      } else {
-        return (float) (accum / accumSim);
-      }
-    }
-  }
-
-}



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