1 /* Java Wrappers to the MSG API. */
3 /* Copyright (c) 2007-2019. The SimGrid Team. All rights reserved. */
5 /* This program is free software; you can redistribute it and/or modify it
6 * under the terms of the license (GNU LGPL) which comes with this package. */
12 #include "simgrid/Exception.hpp"
13 #include "simgrid/msg.h"
14 #include "simgrid/plugins/energy.h"
15 #include "simgrid/plugins/file_system.h"
16 #include "simgrid/plugins/live_migration.h"
17 #include "simgrid/plugins/load.h"
18 #include "simgrid/simix.h"
20 #include "simgrid/s4u/Host.hpp"
22 #include "src/simix/smx_private.hpp"
25 #include "jmsg_as.hpp"
26 #include "jmsg_host.h"
27 #include "jmsg_process.h"
28 #include "jmsg_storage.h"
29 #include "jmsg_task.h"
30 #include "jxbt_utilities.hpp"
32 #include "JavaContext.hpp"
35 /* Shut up some errors in eclipse online compiler. I wish such a pimple wouldn't be needed */
42 /* end of eclipse-mandated pimple */
44 int JAVA_HOST_LEVEL = -1;
46 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(java);
48 JavaVM *__java_vm = nullptr;
50 JNIEnv *get_current_thread_env()
52 using simgrid::kernel::context::JavaContext;
53 JavaContext* ctx = static_cast<JavaContext*>(simgrid::kernel::context::Context::self());
57 void jmsg_throw_status(JNIEnv *env, msg_error_t status) {
60 jxbt_throw_time_out_failure(env, "");
62 case MSG_TRANSFER_FAILURE:
63 jxbt_throw_transfer_failure(env, "");
65 case MSG_HOST_FAILURE:
66 jxbt_throw_host_failure(env, "");
68 case MSG_TASK_CANCELED:
69 jxbt_throw_task_cancelled(env, "");
72 xbt_die("undefined message failed (please see jmsg_throw_status function in jmsg.cpp)");
76 /***************************************************************************************
77 * Unsortable functions *
78 ***************************************************************************************/
80 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Msg_getClock(JNIEnv * env, jclass cls)
82 return (jdouble) MSG_get_clock();
85 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_init(JNIEnv * env, jclass cls, jobjectArray jargs)
89 env->GetJavaVM(&__java_vm);
91 simgrid::kernel::context::factory_initializer = &simgrid::kernel::context::java_factory;
92 jthrowable exc = env->ExceptionOccurred();
94 env->ExceptionClear();
97 setlocale(LC_NUMERIC,"C");
100 argc = static_cast<int>(env->GetArrayLength(jargs));
103 char** argv = new char*[argc + 1];
104 argv[0] = xbt_strdup("java");
106 for (int index = 0; index < argc - 1; index++) {
107 jstring jval = (jstring)env->GetObjectArrayElement(jargs, index);
108 const char* tmp = env->GetStringUTFChars(jval, 0);
109 argv[index + 1] = xbt_strdup(tmp);
110 env->ReleaseStringUTFChars(jval, tmp);
112 argv[argc] = nullptr;
114 MSG_init(&argc, argv);
115 sg_vm_live_migration_plugin_init();
117 JAVA_HOST_LEVEL = simgrid::s4u::Host::extension_create(nullptr);
119 for (int index = 0; index < argc - 1; index++) {
120 env->SetObjectArrayElement(jargs, index, (jstring)env->NewStringUTF(argv[index + 1]));
127 JNIEXPORT void JNICALL JNICALL Java_org_simgrid_msg_Msg_run(JNIEnv * env, jclass cls)
130 XBT_DEBUG("Ready to run MSG_MAIN");
131 msg_error_t rv = MSG_main();
132 XBT_DEBUG("Done running MSG_MAIN");
133 jxbt_check_res("MSG_main()", rv, MSG_OK,
134 xbt_strdup("unexpected error : MSG_main() failed .. please report this bug "));
136 XBT_INFO("MSG_main finished; Terminating the simulation...");
137 /* Cleanup java hosts */
138 xbt_dynar_t hosts = MSG_hosts_as_dynar();
139 for (unsigned long index = 0; index < xbt_dynar_length(hosts) - 1; index++) {
140 msg_host_t msg_host = xbt_dynar_get_as(hosts,index,msg_host_t);
141 jobject jhost = (jobject) msg_host->extension(JAVA_HOST_LEVEL);
143 jhost_unref(env, jhost);
145 xbt_dynar_free(&hosts);
147 /* Cleanup java storages */
148 for (auto const& elm : java_storage_map)
149 jstorage_unref(env, elm.second);
151 /* Display the status of remaining threads. None should survive, but who knows */
152 jclass clsProcess = jxbt_get_class(env, "org/simgrid/msg/Process");
153 jmethodID idDebug = jxbt_get_static_jmethod(env, clsProcess, "debugAllThreads", "()V");
154 xbt_assert(idDebug != nullptr, "Method Process.debugAllThreads() not found...");
155 env->CallStaticVoidMethod(clsProcess, idDebug);
158 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_createEnvironment(JNIEnv * env, jclass cls, jstring jplatformFile)
160 const char *platformFile = env->GetStringUTFChars(jplatformFile, 0);
162 MSG_create_environment(platformFile);
164 env->ReleaseStringUTFChars(jplatformFile, platformFile);
167 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Msg_environmentGetRoutingRoot(JNIEnv * env, jclass cls)
169 msg_netzone_t as = MSG_zone_get_root();
170 jobject jas = jnetzone_new_instance(env);
172 jxbt_throw_jni(env, "java As instantiation failed");
175 jas = jnetzone_ref(env, jas);
177 jxbt_throw_jni(env, "new global ref allocation failed");
180 jnetzone_bind(jas, as, env);
182 return (jobject) jas;
185 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_debug(JNIEnv * env, jclass cls, jstring js)
187 const char *s = env->GetStringUTFChars(js, 0);
189 env->ReleaseStringUTFChars(js, s);
192 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_verb(JNIEnv * env, jclass cls, jstring js)
194 const char *s = env->GetStringUTFChars(js, 0);
196 env->ReleaseStringUTFChars(js, s);
199 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_info(JNIEnv * env, jclass cls, jstring js)
201 const char *s = env->GetStringUTFChars(js, 0);
203 env->ReleaseStringUTFChars(js, s);
206 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_warn(JNIEnv * env, jclass cls, jstring js)
208 const char *s = env->GetStringUTFChars(js, 0);
210 env->ReleaseStringUTFChars(js, s);
213 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_error(JNIEnv * env, jclass cls, jstring js)
215 const char *s = env->GetStringUTFChars(js, 0);
217 env->ReleaseStringUTFChars(js, s);
220 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_critical(JNIEnv * env, jclass cls, jstring js)
222 const char *s = env->GetStringUTFChars(js, 0);
223 XBT_CRITICAL("%s", s);
224 env->ReleaseStringUTFChars(js, s);
227 static int java_main(int argc, char *argv[]);
229 JNIEXPORT void JNICALL
230 Java_org_simgrid_msg_Msg_deployApplication(JNIEnv * env, jclass cls, jstring jdeploymentFile)
232 const char *deploymentFile = env->GetStringUTFChars(jdeploymentFile, 0);
234 SIMIX_function_register_default(java_main);
235 MSG_launch_application(deploymentFile);
238 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_energyInit() {
239 sg_host_energy_plugin_init();
242 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_fileSystemInit()
244 sg_storage_file_system_init();
247 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_loadInit() {
248 sg_host_load_plugin_init();
250 /** Run a Java org.simgrid.msg.Process
252 * If needed, this waits for the process starting time.
253 * Then it calls the Process.run() method.
255 static void run_jprocess(JNIEnv *env, jobject jprocess)
257 // wait for the process's start time
258 jfieldID jprocess_field_Process_startTime = jxbt_get_sfield(env, "org/simgrid/msg/Process", "startTime", "D");
259 jdouble startTime = env->GetDoubleField(jprocess, jprocess_field_Process_startTime);
260 if (startTime > MSG_get_clock())
261 MSG_process_sleep(startTime - MSG_get_clock());
263 //Execution of the "run" method.
264 jmethodID id = jxbt_get_smethod(env, "org/simgrid/msg/Process", "run", "()V");
265 xbt_assert((id != nullptr), "Method Process.run() not found...");
267 env->CallVoidMethod(jprocess, id);
268 if (env->ExceptionOccurred()) {
269 XBT_DEBUG("Something went wrong in this Java actor, forget about it.");
270 env->ExceptionClear();
271 XBT_ATTRIB_UNUSED jint error = __java_vm->DetachCurrentThread();
272 xbt_assert(error == JNI_OK, "Cannot detach failing thread");
273 simgrid::kernel::context::throw_stoprequest();
277 /** Create a Java org.simgrid.msg.Process with the arguments and run it */
278 static int java_main(int argc, char *argv[])
280 JNIEnv *env = get_current_thread_env();
281 simgrid::kernel::context::JavaContext* context =
282 static_cast<simgrid::kernel::context::JavaContext*>(simgrid::kernel::context::Context::self());
284 //Change the "." in class name for "/".
285 std::string arg0 = argv[0];
286 std::replace(begin(arg0), end(arg0), '.', '/');
287 jclass class_Process = env->FindClass(arg0.c_str());
288 //Retrieve the methodID for the constructor
289 xbt_assert((class_Process != nullptr), "Class not found (%s). The deployment file must use the fully qualified class name, including the package. The case is important.", argv[0]);
290 jmethodID constructor_Process = env->GetMethodID(class_Process, "<init>", "(Lorg/simgrid/msg/Host;Ljava/lang/String;[Ljava/lang/String;)V");
291 xbt_assert((constructor_Process != nullptr), "Constructor not found for class %s. Is there a (Host, String ,String[]) constructor in your class ?", argv[0]);
293 //Retrieve the name of the process.
294 jstring jname = env->NewStringUTF(argv[0]);
295 //Build the arguments
296 jobjectArray args = static_cast<jobjectArray>(env->NewObjectArray(argc - 1, env->FindClass("java/lang/String"),
297 env->NewStringUTF("")));
298 for (int i = 1; i < argc; i++)
299 env->SetObjectArrayElement(args,i - 1, env->NewStringUTF(argv[i]));
300 //Retrieve the host for the process.
301 jstring jhostName = env->NewStringUTF(MSG_host_self()->get_cname());
302 jobject jhost = Java_org_simgrid_msg_Host_getByName(env, nullptr, jhostName);
303 //creates the process
304 jobject jprocess = env->NewObject(class_Process, constructor_Process, jhost, jname, args);
305 xbt_assert((jprocess != nullptr), "Process allocation failed.");
306 jprocess = env->NewGlobalRef(jprocess);
307 //bind the process to the context
308 msg_process_t process = MSG_process_self();
310 context->jprocess_ = jprocess;
311 /* sets the PID and the PPID of the process */
312 env->SetIntField(jprocess, jprocess_field_Process_pid, static_cast<jint>(MSG_process_get_PID(process)));
313 env->SetIntField(jprocess, jprocess_field_Process_ppid, static_cast<jint>(MSG_process_get_PPID(process)));
314 jprocess_bind(jprocess, process, env);
316 run_jprocess(env, context->jprocess_);
324 /** Run the Java org.simgrid.msg.Process */
325 void java_main_jprocess(jobject jprocess)
327 JNIEnv *env = get_current_thread_env();
328 simgrid::kernel::context::JavaContext* context =
329 static_cast<simgrid::kernel::context::JavaContext*>(simgrid::kernel::context::Context::self());
330 context->jprocess_ = jprocess;
331 jprocess_bind(context->jprocess_, MSG_process_self(), env);
333 run_jprocess(env, context->jprocess_);