1 /* Java Wrappers to the MSG API. */
3 /* Copyright (c) 2007-2017. 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/simix.h"
16 #include "simgrid/s4u/Host.hpp"
18 #include "src/simix/smx_private.hpp"
21 #include "jmsg_as.hpp"
22 #include "jmsg_host.h"
23 #include "jmsg_process.h"
24 #include "jmsg_storage.h"
25 #include "jmsg_task.h"
26 #include "jxbt_utilities.hpp"
28 #include "JavaContext.hpp"
32 /* Shut up some errors in eclipse online compiler. I wish such a pimple wouldn't be needed */
39 /* end of eclipse-mandated pimple */
43 int JAVA_HOST_LEVEL = -1;
45 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(java);
47 JavaVM *__java_vm = nullptr;
54 JNIEnv *get_current_thread_env()
56 using simgrid::kernel::context::JavaContext;
57 JavaContext* ctx = static_cast<JavaContext*>(xbt_os_thread_get_extra_data());
61 void jmsg_throw_status(JNIEnv *env, msg_error_t status) {
64 jxbt_throw_time_out_failure(env, "");
66 case MSG_TRANSFER_FAILURE:
67 jxbt_throw_transfer_failure(env, "");
69 case MSG_HOST_FAILURE:
70 jxbt_throw_host_failure(env, "");
72 case MSG_TASK_CANCELED:
73 jxbt_throw_task_cancelled(env, "");
76 xbt_die("undefined message failed (please see jmsg_throw_status function in jmsg.cpp)");
80 /***************************************************************************************
81 * Unsortable functions *
82 ***************************************************************************************/
84 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Msg_getClock(JNIEnv * env, jclass cls)
86 return (jdouble) MSG_get_clock();
89 static void __JAVA_host_priv_free(void *host)
93 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_init(JNIEnv * env, jclass cls, jobjectArray jargs)
97 XBT_LOG_CONNECT(java);
98 XBT_LOG_CONNECT(jtrace);
100 env->GetJavaVM(&__java_vm);
102 simgrid::kernel::context::factory_initializer = &simgrid::kernel::context::java_factory;
103 jthrowable exc = env->ExceptionOccurred();
105 env->ExceptionClear();
108 setlocale(LC_NUMERIC,"C");
111 argc = static_cast<int>(env->GetArrayLength(jargs));
114 char** argv = new char*[argc + 1];
115 argv[0] = xbt_strdup("java");
117 for (int index = 0; index < argc - 1; index++) {
118 jstring jval = (jstring)env->GetObjectArrayElement(jargs, index);
119 const char* tmp = env->GetStringUTFChars(jval, 0);
120 argv[index + 1] = xbt_strdup(tmp);
121 env->ReleaseStringUTFChars(jval, tmp);
123 argv[argc] = nullptr;
125 MSG_init(&argc, argv);
127 JAVA_HOST_LEVEL = simgrid::s4u::Host::extension_create(__JAVA_host_priv_free);
129 for (int index = 0; index < argc - 1; index++) {
130 env->SetObjectArrayElement(jargs, index, (jstring)env->NewStringUTF(argv[index + 1]));
137 JNIEXPORT void JNICALL JNICALL Java_org_simgrid_msg_Msg_run(JNIEnv * env, jclass cls)
140 XBT_DEBUG("Ready to run MSG_MAIN");
141 msg_error_t rv = MSG_main();
142 XBT_DEBUG("Done running MSG_MAIN");
143 jxbt_check_res("MSG_main()", rv, MSG_OK,
144 xbt_strdup("unexpected error : MSG_main() failed .. please report this bug "));
146 XBT_INFO("MSG_main finished; Cleaning up the simulation...");
147 /* Cleanup java hosts */
148 xbt_dynar_t hosts = MSG_hosts_as_dynar();
149 for (unsigned long index = 0; index < xbt_dynar_length(hosts) - 1; index++) {
150 msg_host_t msg_host = xbt_dynar_get_as(hosts,index,msg_host_t);
151 jobject jhost = (jobject) msg_host->extension(JAVA_HOST_LEVEL);
153 jhost_unref(env, jhost);
156 xbt_dynar_free(&hosts);
158 /* Cleanup java storages */
159 for (auto const& elm : java_storage_map)
160 jstorage_unref(env, elm.second);
163 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_createEnvironment(JNIEnv * env, jclass cls, jstring jplatformFile)
165 const char *platformFile = env->GetStringUTFChars(jplatformFile, 0);
167 MSG_create_environment(platformFile);
169 env->ReleaseStringUTFChars(jplatformFile, platformFile);
172 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Msg_environmentGetRoutingRoot(JNIEnv * env, jclass cls)
174 msg_netzone_t as = MSG_zone_get_root();
175 jobject jas = jnetzone_new_instance(env);
177 jxbt_throw_jni(env, "java As instantiation failed");
180 jas = jnetzone_ref(env, jas);
182 jxbt_throw_jni(env, "new global ref allocation failed");
185 jnetzone_bind(jas, as, env);
187 return (jobject) jas;
190 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_debug(JNIEnv * env, jclass cls, jstring js)
192 const char *s = env->GetStringUTFChars(js, 0);
194 env->ReleaseStringUTFChars(js, s);
197 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_verb(JNIEnv * env, jclass cls, jstring js)
199 const char *s = env->GetStringUTFChars(js, 0);
201 env->ReleaseStringUTFChars(js, s);
204 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_info(JNIEnv * env, jclass cls, jstring js)
206 const char *s = env->GetStringUTFChars(js, 0);
208 env->ReleaseStringUTFChars(js, s);
211 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_warn(JNIEnv * env, jclass cls, jstring js)
213 const char *s = env->GetStringUTFChars(js, 0);
215 env->ReleaseStringUTFChars(js, s);
218 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_error(JNIEnv * env, jclass cls, jstring js)
220 const char *s = env->GetStringUTFChars(js, 0);
222 env->ReleaseStringUTFChars(js, s);
225 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_critical(JNIEnv * env, jclass cls, jstring js)
227 const char *s = env->GetStringUTFChars(js, 0);
228 XBT_CRITICAL("%s", s);
229 env->ReleaseStringUTFChars(js, s);
232 static int java_main(int argc, char *argv[]);
234 JNIEXPORT void JNICALL
235 Java_org_simgrid_msg_Msg_deployApplication(JNIEnv * env, jclass cls, jstring jdeploymentFile)
237 const char *deploymentFile = env->GetStringUTFChars(jdeploymentFile, 0);
239 SIMIX_function_register_default(java_main);
240 MSG_launch_application(deploymentFile);
243 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_energyInit() {
244 sg_host_energy_plugin_init();
248 /** Run a Java org.simgrid.msg.Process
250 * If needed, this waits for the process starting time.
251 * Then it calls the Process.run() method.
253 static void run_jprocess(JNIEnv *env, jobject jprocess)
255 // wait for the process's start time
256 jfieldID jprocess_field_Process_startTime = jxbt_get_sfield(env, "org/simgrid/msg/Process", "startTime", "D");
257 jdouble startTime = env->GetDoubleField(jprocess, jprocess_field_Process_startTime);
258 if (startTime > MSG_get_clock())
259 MSG_process_sleep(startTime - MSG_get_clock());
260 //Execution of the "run" method.
261 jmethodID id = jxbt_get_smethod(env, "org/simgrid/msg/Process", "run", "()V");
262 xbt_assert((id != nullptr), "Method run() not found...");
263 env->CallVoidMethod(jprocess, id);
266 /** Create a Java org.simgrid.msg.Process with the arguments and run it */
267 static int java_main(int argc, char *argv[])
269 JNIEnv *env = get_current_thread_env();
270 simgrid::kernel::context::JavaContext* context = static_cast<simgrid::kernel::context::JavaContext*>(SIMIX_context_self());
272 //Change the "." in class name for "/".
273 std::string arg0 = argv[0];
274 std::replace(begin(arg0), end(arg0), '.', '/');
275 jclass class_Process = env->FindClass(arg0.c_str());
276 //Retrieve the methodID for the constructor
277 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]);
278 jmethodID constructor_Process = env->GetMethodID(class_Process, "<init>", "(Lorg/simgrid/msg/Host;Ljava/lang/String;[Ljava/lang/String;)V");
279 xbt_assert((constructor_Process != nullptr), "Constructor not found for class %s. Is there a (Host, String ,String[]) constructor in your class ?", argv[0]);
281 //Retrieve the name of the process.
282 jstring jname = env->NewStringUTF(argv[0]);
283 //Build the arguments
284 jobjectArray args = static_cast<jobjectArray>(env->NewObjectArray(argc - 1, env->FindClass("java/lang/String"),
285 env->NewStringUTF("")));
286 for (int i = 1; i < argc; i++)
287 env->SetObjectArrayElement(args,i - 1, env->NewStringUTF(argv[i]));
288 //Retrieve the host for the process.
289 jstring jhostName = env->NewStringUTF(MSG_host_self()->getCname());
290 jobject jhost = Java_org_simgrid_msg_Host_getByName(env, nullptr, jhostName);
291 //creates the process
292 jobject jprocess = env->NewObject(class_Process, constructor_Process, jhost, jname, args);
293 xbt_assert((jprocess != nullptr), "Process allocation failed.");
294 jprocess = env->NewGlobalRef(jprocess);
295 //bind the process to the context
296 msg_process_t process = MSG_process_self();
298 context->jprocess = jprocess;
299 /* sets the PID and the PPID of the process */
300 env->SetIntField(jprocess, jprocess_field_Process_pid, static_cast<jint>(MSG_process_get_PID(process)));
301 env->SetIntField(jprocess, jprocess_field_Process_ppid, static_cast<jint>(MSG_process_get_PPID(process)));
302 jprocess_bind(jprocess, process, env);
304 run_jprocess(env, context->jprocess);
312 /** Run the Java org.simgrid.msg.Process */
313 void java_main_jprocess(jobject jprocess)
315 JNIEnv *env = get_current_thread_env();
316 simgrid::kernel::context::JavaContext* context = static_cast<simgrid::kernel::context::JavaContext*>(SIMIX_context_self());
317 context->jprocess = jprocess;
318 jprocess_bind(context->jprocess, MSG_process_self(), env);
320 run_jprocess(env, context->jprocess);