#include <JNI.hpp>

Public Member Functions
	JVM ()

void	init ()
	Initialized the Java Virtual Machine with specific options and a classpath. More...

JVM &	addOption (const std::string &options)
	Adds a option to the JVM. Throws an exception if the JVM is already started. More...

JVM &	addClasspath (const std::string &classPath)
	Appends a classpath to the JVM before initialization. More...

bool	isInitialized ()
	Indicates if the JVM was already initialized. More...

Static Public Member Functions
static JVM &	get ()
	Returns an instance to a JVM, which may or may not be initialized yet. More...

Detailed Description

When the application's entry point is in C++ rather than in Java, it will need to spin up its own instance of the Java Virtual Machine (JVM) before it can initialize the Java Native Interface. Vm is used to create and destroy a running JVM instance. The JVM is stored in a global static variable. So it can be initialized exactly once. Any further initialization causes an exception. Before creation, the addOption and addClasspath methods can be used, to configure the JVM instance.

As only ever one JVM instance can be created, it is shared by different users. For instance, for the execution of UDFs or as a compilation backend.

Constructor & Destructor Documentation

◆ JVM()

NES::jni::JVM::JVM ( )

inline

Member Function Documentation

◆ addClasspath()

JVM& NES::jni::JVM::addClasspath ( const std::string & classPath )

Appends a classpath to the JVM before initialization.

Parameters

classPath

Returns: JVM

◆ addOption()

JVM& NES::jni::JVM::addOption ( const std::string & options )

Adds a option to the JVM. Throws an exception if the JVM is already started.

Parameters

options

Returns: JVM

◆ get()

static JVM& NES::jni::JVM::get ( )

static

Returns an instance to a JVM, which may or may not be initialized yet.

Returns: JVM.

◆ init()

void NES::jni::JVM::init ( )

Initialized the Java Virtual Machine with specific options and a classpath.

◆ isInitialized()

bool NES::jni::JVM::isInitialized ( )

Indicates if the JVM was already initialized.

Returns: bool

The documentation for this class was generated from the following file:

/nebulastream/nes-runtime/include/Util/JNI/JNI.hpp

Public Member Functions

Static Public Member Functions