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;
51 JNIEnv *get_current_thread_env()
53 using simgrid::kernel::context::JavaContext;
54 JavaContext* ctx = static_cast<JavaContext*>(xbt_os_thread_get_extra_data());
58 void jmsg_throw_status(JNIEnv *env, msg_error_t status) {
61 jxbt_throw_time_out_failure(env, "");
63 case MSG_TRANSFER_FAILURE:
64 jxbt_throw_transfer_failure(env, "");
66 case MSG_HOST_FAILURE:
67 jxbt_throw_host_failure(env, "");
69 case MSG_TASK_CANCELED:
70 jxbt_throw_task_cancelled(env, "");
73 xbt_die("undefined message failed (please see jmsg_throw_status function in jmsg.cpp)");
77 /***************************************************************************************
78 * Unsortable functions *
79 ***************************************************************************************/
81 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Msg_getClock(JNIEnv * env, jclass cls)
83 return (jdouble) MSG_get_clock();
86 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_init(JNIEnv * env, jclass cls, jobjectArray jargs)
90 env->GetJavaVM(&__java_vm);
92 simgrid::kernel::context::factory_initializer = &simgrid::kernel::context::java_factory;
93 jthrowable exc = env->ExceptionOccurred();
95 env->ExceptionClear();
98 setlocale(LC_NUMERIC,"C");
101 argc = static_cast<int>(env->GetArrayLength(jargs));
104 char** argv = new char*[argc + 1];
105 argv[0] = xbt_strdup("java");
107 for (int index = 0; index < argc - 1; index++) {
108 jstring jval = (jstring)env->GetObjectArrayElement(jargs, index);
109 const char* tmp = env->GetStringUTFChars(jval, 0);
110 argv[index + 1] = xbt_strdup(tmp);
111 env->ReleaseStringUTFChars(jval, tmp);
113 argv[argc] = nullptr;
115 MSG_init(&argc, argv);
116 sg_vm_live_migration_plugin_init();
118 JAVA_HOST_LEVEL = simgrid::s4u::Host::extension_create(nullptr);
120 for (int index = 0; index < argc - 1; index++) {
121 env->SetObjectArrayElement(jargs, index, (jstring)env->NewStringUTF(argv[index + 1]));
128 JNIEXPORT void JNICALL JNICALL Java_org_simgrid_msg_Msg_run(JNIEnv * env, jclass cls)
131 XBT_DEBUG("Ready to run MSG_MAIN");
132 msg_error_t rv = MSG_main();
133 XBT_DEBUG("Done running MSG_MAIN");
134 jxbt_check_res("MSG_main()", rv, MSG_OK,
135 xbt_strdup("unexpected error : MSG_main() failed .. please report this bug "));
137 XBT_INFO("MSG_main finished; Cleaning up the simulation...");
138 /* Cleanup java hosts */
139 xbt_dynar_t hosts = MSG_hosts_as_dynar();
140 for (unsigned long index = 0; index < xbt_dynar_length(hosts) - 1; index++) {
141 msg_host_t msg_host = xbt_dynar_get_as(hosts,index,msg_host_t);
142 jobject jhost = (jobject) msg_host->extension(JAVA_HOST_LEVEL);
144 jhost_unref(env, jhost);
147 xbt_dynar_free(&hosts);
149 /* Cleanup java storages */
150 for (auto const& elm : java_storage_map)
151 jstorage_unref(env, elm.second);
154 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_createEnvironment(JNIEnv * env, jclass cls, jstring jplatformFile)
156 const char *platformFile = env->GetStringUTFChars(jplatformFile, 0);
158 MSG_create_environment(platformFile);
160 env->ReleaseStringUTFChars(jplatformFile, platformFile);
163 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Msg_environmentGetRoutingRoot(JNIEnv * env, jclass cls)
165 msg_netzone_t as = MSG_zone_get_root();
166 jobject jas = jnetzone_new_instance(env);
168 jxbt_throw_jni(env, "java As instantiation failed");
171 jas = jnetzone_ref(env, jas);
173 jxbt_throw_jni(env, "new global ref allocation failed");
176 jnetzone_bind(jas, as, env);
178 return (jobject) jas;
181 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_debug(JNIEnv * env, jclass cls, jstring js)
183 const char *s = env->GetStringUTFChars(js, 0);
185 env->ReleaseStringUTFChars(js, s);
188 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_verb(JNIEnv * env, jclass cls, jstring js)
190 const char *s = env->GetStringUTFChars(js, 0);
192 env->ReleaseStringUTFChars(js, s);
195 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_info(JNIEnv * env, jclass cls, jstring js)
197 const char *s = env->GetStringUTFChars(js, 0);
199 env->ReleaseStringUTFChars(js, s);
202 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_warn(JNIEnv * env, jclass cls, jstring js)
204 const char *s = env->GetStringUTFChars(js, 0);
206 env->ReleaseStringUTFChars(js, s);
209 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_error(JNIEnv * env, jclass cls, jstring js)
211 const char *s = env->GetStringUTFChars(js, 0);
213 env->ReleaseStringUTFChars(js, s);
216 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_critical(JNIEnv * env, jclass cls, jstring js)
218 const char *s = env->GetStringUTFChars(js, 0);
219 XBT_CRITICAL("%s", s);
220 env->ReleaseStringUTFChars(js, s);
223 static int java_main(int argc, char *argv[]);
225 JNIEXPORT void JNICALL
226 Java_org_simgrid_msg_Msg_deployApplication(JNIEnv * env, jclass cls, jstring jdeploymentFile)
228 const char *deploymentFile = env->GetStringUTFChars(jdeploymentFile, 0);
230 SIMIX_function_register_default(java_main);
231 MSG_launch_application(deploymentFile);
234 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_energyInit() {
235 sg_host_energy_plugin_init();
238 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_fileSystemInit()
240 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());
256 //Execution of the "run" method.
257 jmethodID id = jxbt_get_smethod(env, "org/simgrid/msg/Process", "run", "()V");
258 xbt_assert((id != nullptr), "Method run() not found...");
259 env->CallVoidMethod(jprocess, id);
262 /** Create a Java org.simgrid.msg.Process with the arguments and run it */
263 static int java_main(int argc, char *argv[])
265 JNIEnv *env = get_current_thread_env();
266 simgrid::kernel::context::JavaContext* context = static_cast<simgrid::kernel::context::JavaContext*>(SIMIX_context_self());
268 //Change the "." in class name for "/".
269 std::string arg0 = argv[0];
270 std::replace(begin(arg0), end(arg0), '.', '/');
271 jclass class_Process = env->FindClass(arg0.c_str());
272 //Retrieve the methodID for the constructor
273 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]);
274 jmethodID constructor_Process = env->GetMethodID(class_Process, "<init>", "(Lorg/simgrid/msg/Host;Ljava/lang/String;[Ljava/lang/String;)V");
275 xbt_assert((constructor_Process != nullptr), "Constructor not found for class %s. Is there a (Host, String ,String[]) constructor in your class ?", argv[0]);
277 //Retrieve the name of the process.
278 jstring jname = env->NewStringUTF(argv[0]);
279 //Build the arguments
280 jobjectArray args = static_cast<jobjectArray>(env->NewObjectArray(argc - 1, env->FindClass("java/lang/String"),
281 env->NewStringUTF("")));
282 for (int i = 1; i < argc; i++)
283 env->SetObjectArrayElement(args,i - 1, env->NewStringUTF(argv[i]));
284 //Retrieve the host for the process.
285 jstring jhostName = env->NewStringUTF(MSG_host_self()->getCname());
286 jobject jhost = Java_org_simgrid_msg_Host_getByName(env, nullptr, jhostName);
287 //creates the process
288 jobject jprocess = env->NewObject(class_Process, constructor_Process, jhost, jname, args);
289 xbt_assert((jprocess != nullptr), "Process allocation failed.");
290 jprocess = env->NewGlobalRef(jprocess);
291 //bind the process to the context
292 msg_process_t process = MSG_process_self();
294 context->jprocess = jprocess;
295 /* sets the PID and the PPID of the process */
296 env->SetIntField(jprocess, jprocess_field_Process_pid, static_cast<jint>(MSG_process_get_PID(process)));
297 env->SetIntField(jprocess, jprocess_field_Process_ppid, static_cast<jint>(MSG_process_get_PPID(process)));
298 jprocess_bind(jprocess, process, env);
300 run_jprocess(env, context->jprocess);
308 /** Run the Java org.simgrid.msg.Process */
309 void java_main_jprocess(jobject jprocess)
311 JNIEnv *env = get_current_thread_env();
312 simgrid::kernel::context::JavaContext* context = static_cast<simgrid::kernel::context::JavaContext*>(SIMIX_context_self());
313 context->jprocess = jprocess;
314 jprocess_bind(context->jprocess, MSG_process_self(), env);
316 run_jprocess(env, context->jprocess);