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/msg.h"
13 #include "simgrid/plugins/energy.h"
14 #include "simgrid/plugins/file_system.h"
15 #include "simgrid/plugins/live_migration.h"
16 #include "simgrid/simix.h"
18 #include "simgrid/s4u/Host.hpp"
20 #include "src/simix/smx_private.hpp"
23 #include "jmsg_as.hpp"
24 #include "jmsg_host.h"
25 #include "jmsg_process.h"
26 #include "jmsg_storage.h"
27 #include "jmsg_task.h"
28 #include "jxbt_utilities.hpp"
30 #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 */
45 int JAVA_HOST_LEVEL = -1;
47 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(java);
49 JavaVM *__java_vm = nullptr;
56 JNIEnv *get_current_thread_env()
58 using simgrid::kernel::context::JavaContext;
59 JavaContext* ctx = static_cast<JavaContext*>(xbt_os_thread_get_extra_data());
63 void jmsg_throw_status(JNIEnv *env, msg_error_t status) {
66 jxbt_throw_time_out_failure(env, "");
68 case MSG_TRANSFER_FAILURE:
69 jxbt_throw_transfer_failure(env, "");
71 case MSG_HOST_FAILURE:
72 jxbt_throw_host_failure(env, "");
74 case MSG_TASK_CANCELED:
75 jxbt_throw_task_cancelled(env, "");
78 xbt_die("undefined message failed (please see jmsg_throw_status function in jmsg.cpp)");
82 /***************************************************************************************
83 * Unsortable functions *
84 ***************************************************************************************/
86 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Msg_getClock(JNIEnv * env, jclass cls)
88 return (jdouble) MSG_get_clock();
91 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_init(JNIEnv * env, jclass cls, jobjectArray jargs)
95 env->GetJavaVM(&__java_vm);
97 simgrid::kernel::context::factory_initializer = &simgrid::kernel::context::java_factory;
98 jthrowable exc = env->ExceptionOccurred();
100 env->ExceptionClear();
103 setlocale(LC_NUMERIC,"C");
106 argc = static_cast<int>(env->GetArrayLength(jargs));
109 char** argv = new char*[argc + 1];
110 argv[0] = xbt_strdup("java");
112 for (int index = 0; index < argc - 1; index++) {
113 jstring jval = (jstring)env->GetObjectArrayElement(jargs, index);
114 const char* tmp = env->GetStringUTFChars(jval, 0);
115 argv[index + 1] = xbt_strdup(tmp);
116 env->ReleaseStringUTFChars(jval, tmp);
118 argv[argc] = nullptr;
120 MSG_init(&argc, argv);
121 sg_vm_live_migration_plugin_init();
123 JAVA_HOST_LEVEL = simgrid::s4u::Host::extension_create(nullptr);
125 for (int index = 0; index < argc - 1; index++) {
126 env->SetObjectArrayElement(jargs, index, (jstring)env->NewStringUTF(argv[index + 1]));
133 JNIEXPORT void JNICALL JNICALL Java_org_simgrid_msg_Msg_run(JNIEnv * env, jclass cls)
136 XBT_DEBUG("Ready to run MSG_MAIN");
137 msg_error_t rv = MSG_main();
138 XBT_DEBUG("Done running MSG_MAIN");
139 jxbt_check_res("MSG_main()", rv, MSG_OK,
140 xbt_strdup("unexpected error : MSG_main() failed .. please report this bug "));
142 XBT_INFO("MSG_main finished; Cleaning up the simulation...");
143 /* Cleanup java hosts */
144 xbt_dynar_t hosts = MSG_hosts_as_dynar();
145 for (unsigned long index = 0; index < xbt_dynar_length(hosts) - 1; index++) {
146 msg_host_t msg_host = xbt_dynar_get_as(hosts,index,msg_host_t);
147 jobject jhost = (jobject) msg_host->extension(JAVA_HOST_LEVEL);
149 jhost_unref(env, jhost);
152 xbt_dynar_free(&hosts);
154 /* Cleanup java storages */
155 for (auto const& elm : java_storage_map)
156 jstorage_unref(env, elm.second);
159 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_createEnvironment(JNIEnv * env, jclass cls, jstring jplatformFile)
161 const char *platformFile = env->GetStringUTFChars(jplatformFile, 0);
163 MSG_create_environment(platformFile);
165 env->ReleaseStringUTFChars(jplatformFile, platformFile);
168 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Msg_environmentGetRoutingRoot(JNIEnv * env, jclass cls)
170 msg_netzone_t as = MSG_zone_get_root();
171 jobject jas = jnetzone_new_instance(env);
173 jxbt_throw_jni(env, "java As instantiation failed");
176 jas = jnetzone_ref(env, jas);
178 jxbt_throw_jni(env, "new global ref allocation failed");
181 jnetzone_bind(jas, as, env);
183 return (jobject) jas;
186 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_debug(JNIEnv * env, jclass cls, jstring js)
188 const char *s = env->GetStringUTFChars(js, 0);
190 env->ReleaseStringUTFChars(js, s);
193 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_verb(JNIEnv * env, jclass cls, jstring js)
195 const char *s = env->GetStringUTFChars(js, 0);
197 env->ReleaseStringUTFChars(js, s);
200 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_info(JNIEnv * env, jclass cls, jstring js)
202 const char *s = env->GetStringUTFChars(js, 0);
204 env->ReleaseStringUTFChars(js, s);
207 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_warn(JNIEnv * env, jclass cls, jstring js)
209 const char *s = env->GetStringUTFChars(js, 0);
211 env->ReleaseStringUTFChars(js, s);
214 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_error(JNIEnv * env, jclass cls, jstring js)
216 const char *s = env->GetStringUTFChars(js, 0);
218 env->ReleaseStringUTFChars(js, s);
221 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_critical(JNIEnv * env, jclass cls, jstring js)
223 const char *s = env->GetStringUTFChars(js, 0);
224 XBT_CRITICAL("%s", s);
225 env->ReleaseStringUTFChars(js, s);
228 static int java_main(int argc, char *argv[]);
230 JNIEXPORT void JNICALL
231 Java_org_simgrid_msg_Msg_deployApplication(JNIEnv * env, jclass cls, jstring jdeploymentFile)
233 const char *deploymentFile = env->GetStringUTFChars(jdeploymentFile, 0);
235 SIMIX_function_register_default(java_main);
236 MSG_launch_application(deploymentFile);
239 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_energyInit() {
240 sg_host_energy_plugin_init();
243 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_fileSystemInit()
245 sg_storage_file_system_init();
249 /** Run a Java org.simgrid.msg.Process
251 * If needed, this waits for the process starting time.
252 * Then it calls the Process.run() method.
254 static void run_jprocess(JNIEnv *env, jobject jprocess)
256 // wait for the process's start time
257 jfieldID jprocess_field_Process_startTime = jxbt_get_sfield(env, "org/simgrid/msg/Process", "startTime", "D");
258 jdouble startTime = env->GetDoubleField(jprocess, jprocess_field_Process_startTime);
259 if (startTime > MSG_get_clock())
260 MSG_process_sleep(startTime - MSG_get_clock());
261 //Execution of the "run" method.
262 jmethodID id = jxbt_get_smethod(env, "org/simgrid/msg/Process", "run", "()V");
263 xbt_assert((id != nullptr), "Method run() not found...");
264 env->CallVoidMethod(jprocess, id);
267 /** Create a Java org.simgrid.msg.Process with the arguments and run it */
268 static int java_main(int argc, char *argv[])
270 JNIEnv *env = get_current_thread_env();
271 simgrid::kernel::context::JavaContext* context = static_cast<simgrid::kernel::context::JavaContext*>(SIMIX_context_self());
273 //Change the "." in class name for "/".
274 std::string arg0 = argv[0];
275 std::replace(begin(arg0), end(arg0), '.', '/');
276 jclass class_Process = env->FindClass(arg0.c_str());
277 //Retrieve the methodID for the constructor
278 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]);
279 jmethodID constructor_Process = env->GetMethodID(class_Process, "<init>", "(Lorg/simgrid/msg/Host;Ljava/lang/String;[Ljava/lang/String;)V");
280 xbt_assert((constructor_Process != nullptr), "Constructor not found for class %s. Is there a (Host, String ,String[]) constructor in your class ?", argv[0]);
282 //Retrieve the name of the process.
283 jstring jname = env->NewStringUTF(argv[0]);
284 //Build the arguments
285 jobjectArray args = static_cast<jobjectArray>(env->NewObjectArray(argc - 1, env->FindClass("java/lang/String"),
286 env->NewStringUTF("")));
287 for (int i = 1; i < argc; i++)
288 env->SetObjectArrayElement(args,i - 1, env->NewStringUTF(argv[i]));
289 //Retrieve the host for the process.
290 jstring jhostName = env->NewStringUTF(MSG_host_self()->getCname());
291 jobject jhost = Java_org_simgrid_msg_Host_getByName(env, nullptr, jhostName);
292 //creates the process
293 jobject jprocess = env->NewObject(class_Process, constructor_Process, jhost, jname, args);
294 xbt_assert((jprocess != nullptr), "Process allocation failed.");
295 jprocess = env->NewGlobalRef(jprocess);
296 //bind the process to the context
297 msg_process_t process = MSG_process_self();
299 context->jprocess = jprocess;
300 /* sets the PID and the PPID of the process */
301 env->SetIntField(jprocess, jprocess_field_Process_pid, static_cast<jint>(MSG_process_get_PID(process)));
302 env->SetIntField(jprocess, jprocess_field_Process_ppid, static_cast<jint>(MSG_process_get_PPID(process)));
303 jprocess_bind(jprocess, process, env);
305 run_jprocess(env, context->jprocess);
313 /** Run the Java org.simgrid.msg.Process */
314 void java_main_jprocess(jobject jprocess)
316 JNIEnv *env = get_current_thread_env();
317 simgrid::kernel::context::JavaContext* context = static_cast<simgrid::kernel::context::JavaContext*>(SIMIX_context_self());
318 context->jprocess = jprocess;
319 jprocess_bind(context->jprocess, MSG_process_self(), env);
321 run_jprocess(env, context->jprocess);