Remove legacy Ray code. (#3121)

* Remove legacy Ray code.

* Fix cmake and simplify monitor.

* Fix linting

* Updates

* Fix

* Implement some methods.

* Remove more plasma manager references.

* Fix

* Linting

* Fix

* Fix

* Make sure class IDs are strings.

* Some path fixes

* Fix

* Path fixes and update arrow

* Fixes.

* linting

* Fixes

* Java fixes

* Some java fixes

* TaskLanguage -> Language

* Minor

* Fix python test and remove unused method signature.

* Fix java tests

* Fix jenkins tests

* Remove commented out code.

java/runtime/src/main/java/org/ray/runtime/config/RayConfig.java

@@ -165,12 +165,12 @@ public class RayConfig {
     // library path
     this.libraryPath = new ImmutableList.Builder<String>().add(
         rayHome + "/build/src/plasma",
-        rayHome + "/build/src/local_scheduler"
+        rayHome + "/build/src/ray/raylet"
     ).addAll(customLibraryPath).build();
 
     redisServerExecutablePath = rayHome +
-        "/build/src/common/thirdparty/redis/src/redis-server";
-    redisModulePath = rayHome + "/build/src/common/redis_module/libray_redis_module.so";
+        "/build/src/ray/thirdparty/redis/src/redis-server";
+    redisModulePath = rayHome + "/build/src/ray/gcs/redis_module/libray_redis_module.so";
     plasmaStoreExecutablePath = rayHome + "/build/src/plasma/plasma_store_server";
     rayletExecutablePath = rayHome + "/build/src/ray/raylet/raylet";
 

java/runtime/src/main/java/org/ray/runtime/generated/Language.java

@@ -2,13 +2,13 @@
 
 package org.ray.runtime.generated;
 
-public final class TaskLanguage {
-  private TaskLanguage() { }
+public final class Language {
+  private Language() { }
   public static final int PYTHON = 0;
-  public static final int JAVA = 1;
+  public static final int CPP = 1;
+  public static final int JAVA = 2;
 
-  public static final String[] names = { "PYTHON", "JAVA", };
+  public static final String[] names = { "PYTHON", "CPP", "JAVA", };
 
   public static String name(int e) { return names[e]; }
 }
-

java/runtime/src/main/java/org/ray/runtime/raylet/RayletClientImpl.java

@@ -13,9 +13,9 @@ import org.ray.api.WaitResult;
 import org.ray.api.id.UniqueId;
 import org.ray.runtime.functionmanager.FunctionDescriptor;
 import org.ray.runtime.generated.Arg;
+import org.ray.runtime.generated.Language;
 import org.ray.runtime.generated.ResourcePair;
 import org.ray.runtime.generated.TaskInfo;
-import org.ray.runtime.generated.TaskLanguage;
 import org.ray.runtime.task.FunctionArg;
 import org.ray.runtime.task.TaskSpec;
 import org.ray.runtime.util.UniqueIdUtil;
@@ -229,7 +229,7 @@ public class RayletClientImpl implements RayletClient {
         actorIdOffset, actorHandleIdOffset, actorCounter,
         false, functionIdOffset,
         argsOffset, returnsOffset, requiredResourcesOffset,
-        requiredPlacementResourcesOffset, TaskLanguage.JAVA,
+        requiredPlacementResourcesOffset, Language.JAVA,
         functionDescriptorOffset);
     fbb.finish(root);
     ByteBuffer buffer = fbb.dataBuffer();
@@ -256,8 +256,8 @@ public class RayletClientImpl implements RayletClient {
   /// 1) pushd $Dir/java/runtime/target/classes
   /// 2) javah -classpath .:$Dir/java/api/target/classes org.ray.runtime.raylet.RayletClientImpl
   /// 3) clang-format -i org_ray_runtime_raylet_RayletClientImpl.h
-  /// 4) cp org_ray_runtime_raylet_RayletClientImpl.h $Dir/src/local_scheduler/lib/java/
-  /// 5) vim $Dir/src/local_scheduler/lib/java/org_ray_runtime_raylet_RayletClientImpl.cc
+  /// 4) cp org_ray_runtime_raylet_RayletClientImpl.h $Dir/src/ray/raylet/lib/java/
+  /// 5) vim $Dir/src/ray/raylet/lib/java/org_ray_runtime_raylet_RayletClientImpl.cc
   /// 6) popd
 
   private static native long nativeInit(String localSchedulerSocket, byte[] workerId,