Package software.amazon.awssdk.crt

Class CRT

java.lang.Object

software.amazon.awssdk.crt.CRT

public final class CRT
extends Object

This class is responsible for loading the aws-crt-jni shared lib for the current platform out of aws-crt-java.jar. One instance of this class has to be created somewhere to invoke the static initialization block which will load the shared lib

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	CRT.UnknownPlatformException	Exception thrown when we can't detect what platform we're running on and thus can't figure out the native library name/path to load.

Field Summary

Fields

Modifier and Type	Field	Description
static int	AWS_CRT_SUCCESS

Constructor Summary

Constructors

Constructor	Description
CRT()

Method Summary

Modifier and Type	Method	Description
static String	awsErrorName(int errorCode)	Given an integer error code from an internal operation
static String	awsErrorString(int errorCode)	Given an integer error code from an internal operation
static int	awsLastError()	Returns the last error on the current thread.
static void	checkJniExceptionContract(boolean clearException)
static void	dumpNativeMemory()	Dump info to logs about all memory currently allocated by native resources.
static String	getArchIdentifier()
static String	getCRuntime(String osIdentifier)
static String	getOSIdentifier()
static CrtPlatform	getPlatformImpl()
static long	nativeMemory()

Methods inherited from class java.lang.Object

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

Field Detail

AWS_CRT_SUCCESS

public static final int AWS_CRT_SUCCESS

See Also:

Constant Field Values

Constructor Detail

CRT

public CRT()

Method Detail

getOSIdentifier

public static String getOSIdentifier()
                              throws CRT.UnknownPlatformException

Returns:

a string describing the detected platform the CRT is executing on

Throws:

CRT.UnknownPlatformException

getArchIdentifier

public static String getArchIdentifier()
                                throws CRT.UnknownPlatformException

Returns:

a string describing the detected architecture the CRT is executing on

Throws:

CRT.UnknownPlatformException

getCRuntime

public static String getCRuntime(String osIdentifier)

getPlatformImpl

public static CrtPlatform getPlatformImpl()

awsLastError

public static int awsLastError()

Returns the last error on the current thread.

Returns:

Last error code recorded in this thread

awsErrorString

public static String awsErrorString(int errorCode)

Given an integer error code from an internal operation

Parameters:

errorCode - An error code returned from an exception or other native function call

Returns:

A user-friendly description of the error

awsErrorName

public static String awsErrorName(int errorCode)

Given an integer error code from an internal operation

Parameters:

errorCode - An error code returned from an exception or other native function call

Returns:

A string identifier for the error

nativeMemory

public static long nativeMemory()

Returns:

The number of bytes allocated in native resources. If aws.crt.memory.tracing is 1 or 2, this will be a non-zero value. Otherwise, no tracing will be done, and the value will always be 0

dumpNativeMemory

public static void dumpNativeMemory()

Dump info to logs about all memory currently allocated by native resources. The following system properties must be set to see a dump: aws.crt.memory.tracing must be 1 or 2 aws.crt.log.level must be "Trace"

checkJniExceptionContract

public static void checkJniExceptionContract(boolean clearException)