org.apache.flink.runtime.entrypoint

Class ClusterEntrypointUtils

java.lang.Object

org.apache.flink.runtime.entrypoint.ClusterEntrypointUtils

public final class ClusterEntrypointUtils
extends Object

Utility class for ClusterEntrypoint.

Field Summary

Fields

Modifier and Type	Field and Description
protected static org.slf4j.Logger	LOG

Method Summary

Modifier and Type	Method and Description
static int	getPoolSize(Configuration config) Gets and verify the io-executor pool size based on configuration.
static <T> T	parseParametersOrExit(String[] args, ParserResultFactory<T> parserResultFactory, Class<?> mainClass) Parses passed String array using the parameter definitions of the passed ParserResultFactory.
static Optional<File>	tryFindUserLibDirectory() Tries to find the user library directory.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

LOG

protected static final org.slf4j.Logger LOG

Method Detail

parseParametersOrExit

public static <T> T parseParametersOrExit(String[] args,
                                          ParserResultFactory<T> parserResultFactory,
                                          Class<?> mainClass)

Parses passed String array using the parameter definitions of the passed ParserResultFactory. The method will call System.exit and print the usage information to stdout in case of a parsing error.

Type Parameters:

T - The parsing result type.

Parameters:

args - The String array that shall be parsed.

parserResultFactory - The ParserResultFactory that collects the parameter parsing instructions.

mainClass - The main class initiating the parameter parsing.

Returns:

The parsing result.

tryFindUserLibDirectory

public static Optional<File> tryFindUserLibDirectory()

Tries to find the user library directory.

Returns:

the user library directory if it exits, returns Optional.empty() if there is none

getPoolSize

public static int getPoolSize(Configuration config)

Gets and verify the io-executor pool size based on configuration.

Parameters:

config - The configuration to read.

Returns:

The legal io-executor pool size.