1 /* Java Wrappers to the MSG API. */
3 /* Copyright (c) 2007-2018. 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/simix.h"
19 #include "simgrid/s4u/Host.hpp"
21 #include "src/simix/smx_private.hpp"
24 #include "jmsg_as.hpp"
25 #include "jmsg_host.h"
26 #include "jmsg_process.h"
27 #include "jmsg_storage.h"
28 #include "jmsg_task.h"
29 #include "jxbt_utilities.hpp"
31 #include "JavaContext.hpp"
34 /* Shut up some errors in eclipse online compiler. I wish such a pimple wouldn't be needed */
41 /* end of eclipse-mandated pimple */
43 int JAVA_HOST_LEVEL = -1;
45 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(java);
47 JavaVM *__java_vm = nullptr;
49 JNIEnv *get_current_thread_env()
51 using simgrid::kernel::context::JavaContext;
52 JavaContext* ctx = static_cast<JavaContext*>(xbt_os_thread_get_extra_data());
56 void jmsg_throw_status(JNIEnv *env, msg_error_t status) {
59 jxbt_throw_time_out_failure(env, "");
61 case MSG_TRANSFER_FAILURE:
62 jxbt_throw_transfer_failure(env, "");
64 case MSG_HOST_FAILURE:
65 jxbt_throw_host_failure(env, "");
67 case MSG_TASK_CANCELED:
68 jxbt_throw_task_cancelled(env, "");
71 xbt_die("undefined message failed (please see jmsg_throw_status function in jmsg.cpp)");
75 /***************************************************************************************
76 * Unsortable functions *
77 ***************************************************************************************/
79 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Msg_getClock(JNIEnv * env, jclass cls)
81 return (jdouble) MSG_get_clock();
84 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_init(JNIEnv * env, jclass cls, jobjectArray jargs)
88 env->GetJavaVM(&__java_vm);
90 simgrid::kernel::context::factory_initializer = &simgrid::kernel::context::java_factory;
91 jthrowable exc = env->ExceptionOccurred();
93 env->ExceptionClear();
96 setlocale(LC_NUMERIC,"C");
99 argc = static_cast<int>(env->GetArrayLength(jargs));
102 char** argv = new char*[argc + 1];
103 argv[0] = xbt_strdup("java");
105 for (int index = 0; index < argc - 1; index++) {
106 jstring jval = (jstring)env->GetObjectArrayElement(jargs, index);
107 const char* tmp = env->GetStringUTFChars(jval, 0);
108 argv[index + 1] = xbt_strdup(tmp);
109 env->ReleaseStringUTFChars(jval, tmp);
111 argv[argc] = nullptr;
113 MSG_init(&argc, argv);
114 sg_vm_live_migration_plugin_init();
116 JAVA_HOST_LEVEL = simgrid::s4u::Host::extension_create(nullptr);
118 for (int index = 0; index < argc - 1; index++) {
119 env->SetObjectArrayElement(jargs, index, (jstring)env->NewStringUTF(argv[index + 1]));
126 JNIEXPORT void JNICALL JNICALL Java_org_simgrid_msg_Msg_run(JNIEnv * env, jclass cls)
129 XBT_DEBUG("Ready to run MSG_MAIN");
130 msg_error_t rv = MSG_main();
131 XBT_DEBUG("Done running MSG_MAIN");
132 jxbt_check_res("MSG_main()", rv, MSG_OK,
133 xbt_strdup("unexpected error : MSG_main() failed .. please report this bug "));
135 XBT_INFO("MSG_main finished; Terminating the simulation...");
136 /* Cleanup java hosts */
137 xbt_dynar_t hosts = MSG_hosts_as_dynar();
138 for (unsigned long index = 0; index < xbt_dynar_length(hosts) - 1; index++) {
139 msg_host_t msg_host = xbt_dynar_get_as(hosts,index,msg_host_t);
140 jobject jhost = (jobject) msg_host->extension(JAVA_HOST_LEVEL);
142 jhost_unref(env, jhost);
144 xbt_dynar_free(&hosts);
146 /* Cleanup java storages */
147 for (auto const& elm : java_storage_map)
148 jstorage_unref(env, elm.second);
150 /* FIXME: don't be of such an EXTREM BRUTALITY to stop the jvm. Sorry I don't get it working otherwise.
151 * See the comment in ActorImpl.cpp::SIMIX_process_kill() */
155 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_createEnvironment(JNIEnv * env, jclass cls, jstring jplatformFile)
157 const char *platformFile = env->GetStringUTFChars(jplatformFile, 0);
159 MSG_create_environment(platformFile);
161 env->ReleaseStringUTFChars(jplatformFile, platformFile);
164 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Msg_environmentGetRoutingRoot(JNIEnv * env, jclass cls)
166 msg_netzone_t as = MSG_zone_get_root();
167 jobject jas = jnetzone_new_instance(env);
169 jxbt_throw_jni(env, "java As instantiation failed");
172 jas = jnetzone_ref(env, jas);
174 jxbt_throw_jni(env, "new global ref allocation failed");
177 jnetzone_bind(jas, as, env);
179 return (jobject) jas;
182 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_debug(JNIEnv * env, jclass cls, jstring js)
184 const char *s = env->GetStringUTFChars(js, 0);
186 env->ReleaseStringUTFChars(js, s);
189 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_verb(JNIEnv * env, jclass cls, jstring js)
191 const char *s = env->GetStringUTFChars(js, 0);
193 env->ReleaseStringUTFChars(js, s);
196 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_info(JNIEnv * env, jclass cls, jstring js)
198 const char *s = env->GetStringUTFChars(js, 0);
200 env->ReleaseStringUTFChars(js, s);
203 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_warn(JNIEnv * env, jclass cls, jstring js)
205 const char *s = env->GetStringUTFChars(js, 0);
207 env->ReleaseStringUTFChars(js, s);
210 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_error(JNIEnv * env, jclass cls, jstring js)
212 const char *s = env->GetStringUTFChars(js, 0);
214 env->ReleaseStringUTFChars(js, s);
217 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_critical(JNIEnv * env, jclass cls, jstring js)
219 const char *s = env->GetStringUTFChars(js, 0);
220 XBT_CRITICAL("%s", s);
221 env->ReleaseStringUTFChars(js, s);
224 static int java_main(int argc, char *argv[]);
226 JNIEXPORT void JNICALL
227 Java_org_simgrid_msg_Msg_deployApplication(JNIEnv * env, jclass cls, jstring jdeploymentFile)
229 const char *deploymentFile = env->GetStringUTFChars(jdeploymentFile, 0);
231 SIMIX_function_register_default(java_main);
232 MSG_launch_application(deploymentFile);
235 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_energyInit() {
236 sg_host_energy_plugin_init();
239 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_fileSystemInit()
241 sg_storage_file_system_init();
244 /** Run a Java org.simgrid.msg.Process
246 * If needed, this waits for the process starting time.
247 * Then it calls the Process.run() method.
249 static void run_jprocess(JNIEnv *env, jobject jprocess)
251 // wait for the process's start time
252 jfieldID jprocess_field_Process_startTime = jxbt_get_sfield(env, "org/simgrid/msg/Process", "startTime", "D");
253 jdouble startTime = env->GetDoubleField(jprocess, jprocess_field_Process_startTime);
254 if (startTime > MSG_get_clock())
255 MSG_process_sleep(startTime - MSG_get_clock());
257 //Execution of the "run" method.
258 jmethodID id = jxbt_get_smethod(env, "org/simgrid/msg/Process", "run", "()V");
259 xbt_assert((id != nullptr), "Method Process.run() not found...");
261 env->CallVoidMethod(jprocess, id);
264 /** Create a Java org.simgrid.msg.Process with the arguments and run it */
265 static int java_main(int argc, char *argv[])
267 JNIEnv *env = get_current_thread_env();
268 simgrid::kernel::context::JavaContext* context = static_cast<simgrid::kernel::context::JavaContext*>(SIMIX_context_self());
270 //Change the "." in class name for "/".
271 std::string arg0 = argv[0];
272 std::replace(begin(arg0), end(arg0), '.', '/');
273 jclass class_Process = env->FindClass(arg0.c_str());
274 //Retrieve the methodID for the constructor
275 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]);
276 jmethodID constructor_Process = env->GetMethodID(class_Process, "<init>", "(Lorg/simgrid/msg/Host;Ljava/lang/String;[Ljava/lang/String;)V");
277 xbt_assert((constructor_Process != nullptr), "Constructor not found for class %s. Is there a (Host, String ,String[]) constructor in your class ?", argv[0]);
279 //Retrieve the name of the process.
280 jstring jname = env->NewStringUTF(argv[0]);
281 //Build the arguments
282 jobjectArray args = static_cast<jobjectArray>(env->NewObjectArray(argc - 1, env->FindClass("java/lang/String"),
283 env->NewStringUTF("")));
284 for (int i = 1; i < argc; i++)
285 env->SetObjectArrayElement(args,i - 1, env->NewStringUTF(argv[i]));
286 //Retrieve the host for the process.
287 jstring jhostName = env->NewStringUTF(MSG_host_self()->get_cname());
288 jobject jhost = Java_org_simgrid_msg_Host_getByName(env, nullptr, jhostName);
289 //creates the process
290 jobject jprocess = env->NewObject(class_Process, constructor_Process, jhost, jname, args);
291 xbt_assert((jprocess != nullptr), "Process allocation failed.");
292 jprocess = env->NewGlobalRef(jprocess);
293 //bind the process to the context
294 msg_process_t process = MSG_process_self();
296 context->jprocess_ = jprocess;
297 /* sets the PID and the PPID of the process */
298 env->SetIntField(jprocess, jprocess_field_Process_pid, static_cast<jint>(MSG_process_get_PID(process)));
299 env->SetIntField(jprocess, jprocess_field_Process_ppid, static_cast<jint>(MSG_process_get_PPID(process)));
300 jprocess_bind(jprocess, process, env);
302 run_jprocess(env, context->jprocess_);
310 /** Run the Java org.simgrid.msg.Process */
311 void java_main_jprocess(jobject jprocess)
313 JNIEnv *env = get_current_thread_env();
314 simgrid::kernel::context::JavaContext* context = static_cast<simgrid::kernel::context::JavaContext*>(SIMIX_context_self());
315 context->jprocess_ = jprocess;
316 jprocess_bind(context->jprocess_, MSG_process_self(), env);
318 run_jprocess(env, context->jprocess_);