[Java] Simplify Java worker configuration (#2938)

mirror of https://github.com/wassname/ray.git synced 2026-07-03 02:00:12 +08:00

## What do these changes do?
Previously, Java worker configuration is complicated, because it requires setting environment variables as well as command-line arguments.

This PR aims to simplify Java worker's configuration. 
1) Configuration management is now migrated to [lightbend config](https://github.com/lightbend/config), thus doesn't require setting environment variables.
2) Many unused config items are removed.
3) Provide a simple `example.conf` file, so users can get started quickly.
4) All possible options and their default values are declared and documented in `ray.default.conf` file.

This PR also simplifies and refines the following code:
1) The process of `Ray.init()`.
2) `RunManager`.
3) `WorkerContext`. 

### How to use this configuration?
1. Copy `example.conf` into your classpath and rename it to `ray.conf`.
2. Modify/add your configuration items. The all items are declared in `ray.default.conf`.
3. You can also set the items in java system prosperities.

Note: configuration is read in this priority:
System properties > `ray.conf` > `ray.default.conf`

## Related issue number
N/A

This commit is contained in:

Wang Qing

2018-09-26 20:14:22 +08:00

committed by

Hao Chen

parent 0e552fbb22

commit 8e8e123777

45 changed files with 865 additions and 1892 deletions

									
										java/doc/installation.rst
									
		-1
	
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				@@ -57,5 +57,4 @@ Run tests

				::

				  # in `ray/java` directory

				  export RAY_CONFIG=ray.config.ini

				  mvn test