com.zaxxer.hikari.util

Class UtilityElf

java.lang.Object

com.zaxxer.hikari.util.UtilityElf

public final class UtilityElf
extends Object

Author:

Brett Wooldridge

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	UtilityElf.DefaultThreadFactory

Constructor Summary

Constructors

Constructor and Description
UtilityElf()

Method Summary

Methods

Modifier and Type	Method and Description
static <T> T	createInstance(String className, Class<T> clazz, Object... args) Create and instance of the specified class using the constructor matching the specified arguments.
static ThreadPoolExecutor	createThreadPoolExecutor(BlockingQueue<Runnable> queue, String threadName, ThreadFactory threadFactory, RejectedExecutionHandler policy) Create a ThreadPoolExecutor.
static ThreadPoolExecutor	createThreadPoolExecutor(int queueSize, String threadName, ThreadFactory threadFactory, RejectedExecutionHandler policy) Create a ThreadPoolExecutor.
static String	getNullIfEmpty(String text) Check whether the provided String is empty or null and return a null in either case, otherwise return the trimmed String.
static int	getTransactionIsolation(String transactionIsolationName) Get the int value of a transaction isolation level by name.
static boolean	isJdk8Plus() Are we running on JDK 8 or above?
static void	quietlySleep(long millis) Sleep and transform an InterruptedException into a RuntimeException.

Methods inherited from class java.lang.Object

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

Constructor Detail

UtilityElf

public UtilityElf()

Method Detail

getNullIfEmpty

public static String getNullIfEmpty(String text)

Check whether the provided String is empty or null and return a null in either case, otherwise return the trimmed String.

Parameters:

text - the String to check for emptiness

Returns:

null if string is null or empty

quietlySleep

public static void quietlySleep(long millis)

Sleep and transform an InterruptedException into a RuntimeException.

Parameters:

millis - the number of milliseconds to sleep

createInstance

public static <T> T createInstance(String className,
                   Class<T> clazz,
                   Object... args)

Create and instance of the specified class using the constructor matching the specified arguments.

Type Parameters:

T - the class type

Parameters:

className - the name of the class to instantiate

clazz - a class to cast the result as

args - arguments to a constructor

Returns:

an instance of the specified class

createThreadPoolExecutor

public static ThreadPoolExecutor createThreadPoolExecutor(int queueSize,
                                          String threadName,
                                          ThreadFactory threadFactory,
                                          RejectedExecutionHandler policy)

Create a ThreadPoolExecutor.

Parameters:

queueSize - the queue size

threadName - the thread name

threadFactory - an optional ThreadFactory

policy - the RejectedExecutionHandler policy

Returns:

a ThreadPoolExecutor

createThreadPoolExecutor

public static ThreadPoolExecutor createThreadPoolExecutor(BlockingQueue<Runnable> queue,
                                          String threadName,
                                          ThreadFactory threadFactory,
                                          RejectedExecutionHandler policy)

Create a ThreadPoolExecutor.

Parameters:

queue - the BlockingQueue to use

threadName - the thread name

threadFactory - an optional ThreadFactory

policy - the RejectedExecutionHandler policy

Returns:

a ThreadPoolExecutor

getTransactionIsolation

public static int getTransactionIsolation(String transactionIsolationName)

Get the int value of a transaction isolation level by name.

Parameters:

transactionIsolationName - the name of the transaction isolation level

Returns:

the int value of the isolation level or -1

isJdk8Plus

public static boolean isJdk8Plus()

Are we running on JDK 8 or above?

Returns:

true if JDK 8+, false otherwise