BaseJni.h

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/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */
 
#ifndef META_OCEAN_BASE_JNI_BASE_JNI_H
#define META_OCEAN_BASE_JNI_BASE_JNI_H
 
#include "ocean/base/jni/JNI.h"
 
#include "ocean/base/Messenger.h"
 
#include <jni.h>
 
/**
 * Java native interface function to initialize the Ocean Framework.
 * Several individual message output types can be specified and combined:
 * - "OUTPUT_STANDARD": To write all messages to the standard output (e.g., std::cout on desktop platforms, or Android logcat on Android platforms).
 * - "OUTPUT_QUEUED": To queue all messages and to explicitly pop the messages later (e.g., to display messages in a debug window).
 * - "<filename>": To write all messages to a define file.
 * @param env The JNI environment, must be valid
 * @param javaThis The JNI Base object
 * @param messageOutputType The type of the message output to be used, empty to use 'OUTPUT_STANDARD'
 * @return True, if succeeded
 * @ingroup basejni
 */
extern "C" jboolean Java_com_meta_ocean_base_BaseJni_initialize(JNIEnv* env, jobject javaThis, jstring messageOutputType);
 
/**
 * Java native interface function to initialize the Ocean Framework.
 * @param env The JNI environment, must be valid
 * @param javaThis The JNI Base object
 * @param messageOutputType The type of the message output to be used.
 * @param outputFile The name of the file to which messages will be written, 'messageOutputType' must contain 'OUTPUT_FILE', empty otherwise
 * @return True, if succeeded
 * @ingroup basejni
 */
extern "C" jboolean Java_com_meta_ocean_base_BaseJni_initializeWithMessageOutput(JNIEnv* env, jobject javaThis, jint messageOutputType, jstring outputFile);
 
/**
 * Java native interface function to set the current activity.
 * @param env The JNI environment, must be valid
 * @param javaThis The JNI Base object
 * @param activity The current activity to be set or updated, can be nullptr to remove the previously set activity
 * @return True, if succeeded
 * @ingroup basejni
 */
extern "C" jboolean Java_com_meta_ocean_base_BaseJni_setCurrentActivity(JNIEnv* env, jobject javaThis, jobject activity);
 
/**
 * Forces a specific number of processor cores.
 * @param env The JNI environment
 * @param javaThis The JNI object
 * @param cores CPU cores to be forced during initialization
 * @return True, if succeeded
 * @ingroup basejni
 */
extern "C" jboolean Java_com_meta_ocean_base_BaseJni_forceProcessorCoreNumber(JNIEnv* env, jobject javaThis, jint cores);
 
/**
 * Sets or changes the maximal capacity of the worker pool.
 * @param env The JNI environment
 * @param javaThis The JNI object
 * @param capacity The maximal number of worker objects the worker pool may provide
 * @return True, if succeeded
 * @ingroup basejni
 */
extern "C" jboolean Java_com_meta_ocean_base_BaseJni_setWorkerPoolCapacity(JNIEnv* env, jobject javaThis, jint capacity);
 
/**
 * Java native interface function to forward a debug message to the framework.
 * @param env The JNI environment
 * @param javaThis The JNI object
 * @param message The debug message to forward
 * @ingroup basejni
 * @see Java_com_meta_ocean_base_BaseJni_information().
 */
extern "C" void Java_com_meta_ocean_base_BaseJni_debug(JNIEnv* env, jobject javaThis, jstring message);
 
/**
 * Java native interface function to forward an information message to the framework.
 * @param env The JNI environment
 * @param javaThis The JNI object
 * @param message The information message to forward
 * @ingroup basejni
 * @see Java_com_meta_ocean_NativeInterface_warning(), Java_com_meta_ocean_NativeInterface_error().
 */
extern "C" void Java_com_meta_ocean_base_BaseJni_information(JNIEnv* env, jobject javaThis, jstring message);
 
/**
 * Java native interface function to forward an information message to the framework.
 * @param env The JNI environment
 * @param javaThis The JNI object
 * @param message The warning message to forward
 * @ingroup basejni
 * @see Java_com_meta_ocean_NativeInterface_information(), Java_com_meta_ocean_NativeInterface_error().
 */
extern "C" void Java_com_meta_ocean_base_BaseJni_warning(JNIEnv* env, jobject javaThis, jstring message);
 
/**
 * Java native interface function to forward an information message to the framework.
 * @param env The JNI environment
 * @param javaThis The JNI object
 * @param message The error message to forward
 * @ingroup basejni
 * @see Java_com_meta_ocean_NativeInterface_information(), Java_com_meta_ocean_NativeInterface_warning().
 */
extern "C" void Java_com_meta_ocean_base_BaseJni_error(JNIEnv* env, jobject javaThis, jstring message);
 
/**
 * Pops all messages that a currently waiting in the message queue.
 * @param env The JNI environment
 * @param javaThis The JNI object
 * @return The messages that have been popped.
 * @ingroup basejni
 */
extern "C" jstring Java_com_meta_ocean_base_BaseJni_popMessages(JNIEnv* env, jobject javaThis);
 
/**
 * Exits the application by invoking the exit() command.
 * Beware: Commonly Android decides whether an application will be terminated or not so that this function should be a workaround only.
 * @param env The JNI environment
 * @param javaThis The JNI object
 * @param exitValue The exit value to be used
 * @ingroup basejni
 */
extern "C" void Java_com_meta_ocean_base_BaseJni_exit(JNIEnv* env, jobject javaThis, jint exitValue);
 
namespace Ocean
{
 
namespace JNI
{
 
/**
 * This class implements a base native interface.
 * @ingroup basejni
 */
class OCEAN_BASE_JNI_EXPORT BaseJni
{
    public:
 
        /**
         * Initializes the Ocean framework.
         * Several individual message output types can be specified and combined:
         * - "STANDARD": To write all messages to the standard output (e.g., std::cout on desktop platforms, or Android logcat on Android platforms).
         * - "QUEUED": To queue all messages and to explicitly pop the messages later (e.g., to display messages in a debug window).
         * - <filename>: To write all messages to a define file.
         * @param messageOutputType The type of the message output to be used, empty to use 'STANDARD'
         * @return True, if succeeded
         */
        static bool initialize(const std::string& messageOutputType);
 
        /**
         * Initializes the Ocean framework.
         * @param messageOutputType The type of the message output to be used.
         * @param outputFile The name of the file to which messages will be written, 'messageOutputType' must contain 'OUTPUT_FILE', empty otherwise
         * @return True, if succeeded
         */
        static bool initialize(const Messenger::MessageOutput messageOutputType, const std::string& outputFile);
 
        /**
         * Forces a specific number of processor cores.
         * @param cores CPU cores to be forced during initialization
         * @return True, if succeeded
         */
        static bool forceProcessorCoreNumber(const unsigned int cores);
 
        /**
         * Sets or changes the maximal capacity of the worker pool.
         * @param capacity The maximal number of worker objects the worker pool may provide
         * @return True, if succeeded
         */
        static bool setWorkerPoolCapacity(const unsigned int capacity);
 
        /**
         * Java native interface function to forward a debug message to the framework.
         * @param message The debug message to forward
         */
        static void debug(const std::string& message);
 
        /**
         * Java native interface function to forward an information message to the framework.
         * @param message The information message to forward
         */
        static void information(const std::string& message);
 
        /**
         * Java native interface function to forward a warning message to the framework.
         * @param message The warning message to forward
         */
        static void warning(const std::string& message);
 
        /**
         * Java native interface function to forward an error message to the framework.
         * @param message The error message to forward
         */
        static void error(const std::string& message);
 
        /**
         * Pops all messages that a currently waiting in the message queue.
         * @return The messages that have been popped.
         */
        static std::string popMessages();
};
 
}
 
}
 
#endif // META_OCEAN_BASE_JNI_BASE_JNI_H