Package org.apache.ignite.internal.client.util

Class GridClientUtils

java.lang.Object

org.apache.ignite.internal.client.util.GridClientUtils

public abstract class GridClientUtils
extends Object

Java client utils.

Constructor Summary

Constructors

Constructor	Description
GridClientUtils()

Method Summary

Modifier and Type	Method	Description
static <T> Collection<T>	applyFilter(Iterable<? extends T> elements, GridClientPredicate<? super T>... filters)	Applies filter and returns filtered collection of nodes.
static void	closeQuiet(@Nullable Closeable closeable)	Closes resource without reporting any error.
static <T> GridClientPredicate<T>	contains(Collection<T> c)	Creates a predicates that checks if given value is contained in collection c.
static <T> T	first(@Nullable Iterable<? extends T> c)	Gets first element from given collection or returns null if the collection is empty.
static String	getSimpleName(Class<?> cls)	Gets simple class name taking care of empty names.
static boolean	restAvailable(GridClientNode node, GridClientProtocol p)	Checks if given REST protocol available for given node.
static int	safeAbs(int i)	Gets absolute value for integer.
static void	shutdownNow(Class<?> owner, ExecutorService exec, Logger log)	Shutdowns given ExecutorService and wait for executor service to stop.

Methods inherited from class java.lang.Object

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

Constructor Detail

GridClientUtils

public GridClientUtils()

Method Detail

closeQuiet

public static void closeQuiet(@Nullable
                              @Nullable Closeable closeable)

Closes resource without reporting any error.

Parameters:

closeable - Resource to close.

contains

public static <T> GridClientPredicate<T> contains(Collection<T> c)

Creates a predicates that checks if given value is contained in collection c.

Type Parameters:

T - Type of elements in collection.

Parameters:

c - Collection to check.

Returns:

Predicate.

first

@Nullable
public static <T> T first(@Nullable
                          @Nullable Iterable<? extends T> c)

Gets first element from given collection or returns null if the collection is empty.

Type Parameters:

T - Type of the collection.

Parameters:

c - A collection.

Returns:

Collections' first element or null in case if the collection is empty.

applyFilter

public static <T> Collection<T> applyFilter(Iterable<? extends T> elements,
                                            GridClientPredicate<? super T>... filters)

Applies filter and returns filtered collection of nodes.

Parameters:

elements - Nodes to be filtered.

filters - Filters to apply. Elements of this array are allowed to be null.

Returns:

Filtered collection.

restAvailable

public static boolean restAvailable(GridClientNode node,
                                    GridClientProtocol p)

Checks if given REST protocol available for given node.

Parameters:

node - Node.

p - Protocol.

Returns:

true if protocol p available for node, false otherwise.

shutdownNow

public static void shutdownNow(Class<?> owner,
                               ExecutorService exec,
                               Logger log)

Shutdowns given ExecutorService and wait for executor service to stop.

Parameters:

owner - The ExecutorService owner.

exec - ExecutorService to shutdown.

log - The logger to possible exceptions and warnings.

getSimpleName

public static String getSimpleName(Class<?> cls)

Gets simple class name taking care of empty names.

Parameters:

cls - Class to get the name for.

Returns:

Simple class name.

safeAbs

public static int safeAbs(int i)

Gets absolute value for integer. If integer is Integer.MIN_VALUE, then 0 is returned.

Parameters:

i - Integer.

Returns:

Absolute value.