1 /* Functions related to the java host instances. */
3 /* Copyright (c) 2007-2020. 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. */
8 #include "simgrid/Exception.hpp"
9 #include "simgrid/plugins/energy.h"
10 #include "simgrid/plugins/load.h"
11 #include "simgrid/s4u/Host.hpp"
12 #include "simgrid/s4u/Storage.hpp"
14 #include "JavaContext.hpp"
16 #include "jmsg_host.h"
17 #include "jmsg_storage.h"
18 #include "jxbt_utilities.hpp"
20 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(java);
22 static jmethodID jhost_method_Host_constructor;
23 static jfieldID jhost_field_Host_bind;
24 static jfieldID jhost_field_Host_name;
26 jobject jhost_new_instance(JNIEnv * env) {
27 jclass cls = jxbt_get_class(env, "org/simgrid/msg/Host");
28 return env->NewObject(cls, jhost_method_Host_constructor);
31 jobject jhost_ref(JNIEnv * env, jobject jhost) {
32 return env->NewGlobalRef(jhost);
35 void jhost_unref(JNIEnv * env, jobject jhost) {
36 env->DeleteGlobalRef(jhost);
39 void jhost_bind(jobject jhost, msg_host_t host, JNIEnv * env) {
40 env->SetLongField(jhost, jhost_field_Host_bind, (jlong) (uintptr_t) (host));
43 msg_host_t jhost_get_native(JNIEnv * env, jobject jhost) {
44 return (msg_host_t) (uintptr_t) env->GetLongField(jhost, jhost_field_Host_bind);
47 JNIEXPORT void JNICALL Java_org_simgrid_msg_Host_nativeInit(JNIEnv *env, jclass cls) {
48 jclass class_Host = env->FindClass("org/simgrid/msg/Host");
49 jhost_method_Host_constructor = env->GetMethodID(class_Host, "<init>", "()V");
50 jhost_field_Host_bind = jxbt_get_jfield(env,class_Host, "bind", "J");
51 jhost_field_Host_name = jxbt_get_jfield(env, class_Host, "name", "Ljava/lang/String;");
52 xbt_assert(class_Host && jhost_field_Host_name && jhost_method_Host_constructor && jhost_field_Host_bind,
53 "Native initialization of msg/Host failed. Please report that bug");
56 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Host_getByName(JNIEnv* env, jclass cls, jstring jname)
58 /* get the C string from the java string */
59 if (jname == nullptr) {
60 jxbt_throw_null(env, "No host can have a null name");
63 const char *name = env->GetStringUTFChars(jname, 0);
64 /* get the host by name (the hosts are created during the grid resolution) */
65 sg_host_t host = sg_host_by_name(name);
67 if (not host) { /* invalid name */
68 jxbt_throw_host_not_found(env, name);
69 env->ReleaseStringUTFChars(jname, name);
72 env->ReleaseStringUTFChars(jname, name);
74 if (not host->extension(JAVA_HOST_LEVEL)) { /* native host not associated yet with java host */
75 /* Instantiate a new java host */
76 jobject jhost = jhost_new_instance(env);
79 jxbt_throw_jni(env, "java host instantiation failed");
83 /* get a global reference to the newly created host */
84 jhost = jhost_ref(env, jhost);
87 jxbt_throw_jni(env, "new global ref allocation failed");
90 /* Sets the java host name */
91 env->SetObjectField(jhost, jhost_field_Host_name, jname);
92 /* bind the java host and the native host */
93 jhost_bind(jhost, host, env);
95 /* the native host data field is set with the global reference to the java host returned by this function */
96 host->extension_set(JAVA_HOST_LEVEL, (void *)jhost);
99 /* return the global reference to the java host instance */
100 return (jobject) host->extension(JAVA_HOST_LEVEL);
103 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Host_currentHost(JNIEnv * env, jclass cls) {
106 sg_host_t host = sg_host_self();
108 if (not host->extension(JAVA_HOST_LEVEL)) {
109 /* the native host not yet associated with the java host instance */
111 /* instantiate a new java host instance */
112 jhost = jhost_new_instance(env);
115 jxbt_throw_jni(env, "java host instantiation failed");
119 /* get a global reference to the newly created host */
120 jhost = jhost_ref(env, jhost);
123 jxbt_throw_jni(env, "global ref allocation failed");
126 /* Sets the host name */
127 jobject jname = env->NewStringUTF(host->get_cname());
128 env->SetObjectField(jhost, jhost_field_Host_name, jname);
129 /* Bind & store it */
130 jhost_bind(jhost, host, env);
131 host->extension_set(JAVA_HOST_LEVEL, (void *) jhost);
133 jhost = (jobject) host->extension(JAVA_HOST_LEVEL);
139 JNIEXPORT void JNICALL Java_org_simgrid_msg_Host_on(JNIEnv *env, jobject jhost) {
140 sg_host_t host = jhost_get_native(env, jhost);
141 sg_host_turn_on(host);
144 JNIEXPORT void JNICALL Java_org_simgrid_msg_Host_off(JNIEnv *env, jobject jhost) {
145 sg_host_t host = jhost_get_native(env, jhost);
146 if (not simgrid::ForcefulKillException::try_n_catch([host]() { sg_host_turn_off(host); }))
147 jxbt_throw_by_name(env, "org/simgrid/msg/ProcessKilledError", "Host turned off");
150 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Host_getCount(JNIEnv * env, jclass cls) {
151 return (jint)sg_host_count();
154 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getSpeed(JNIEnv * env, jobject jhost) {
155 const_sg_host_t host = jhost_get_native(env, jhost);
158 jxbt_throw_notbound(env, "host", jhost);
162 return (jdouble)sg_host_speed(host);
165 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getCoreNumber(JNIEnv * env, jobject jhost) {
166 const_sg_host_t host = jhost_get_native(env, jhost);
169 jxbt_throw_notbound(env, "host", jhost);
173 return (jdouble)sg_host_core_count(host);
176 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Host_getProperty(JNIEnv *env, jobject jhost, jobject jname) {
177 const_sg_host_t host = jhost_get_native(env, jhost);
180 jxbt_throw_notbound(env, "host", jhost);
183 const char *name = env->GetStringUTFChars((jstring) jname, 0);
185 const char* property = sg_host_get_property_value(host, name);
190 jobject jproperty = env->NewStringUTF(property);
192 env->ReleaseStringUTFChars((jstring) jname, name);
197 JNIEXPORT void JNICALL
198 Java_org_simgrid_msg_Host_setProperty(JNIEnv *env, jobject jhost, jobject jname, jobject jvalue) {
199 sg_host_t host = jhost_get_native(env, jhost);
202 jxbt_throw_notbound(env, "host", jhost);
205 const char *name = env->GetStringUTFChars((jstring) jname, 0);
206 const char *value_java = env->GetStringUTFChars((jstring) jvalue, 0);
207 const char* value = xbt_strdup(value_java);
209 sg_host_set_property_value(host, name, value);
211 env->ReleaseStringUTFChars((jstring) jvalue, value_java);
212 env->ReleaseStringUTFChars((jstring) jname, name);
215 JNIEXPORT jboolean JNICALL Java_org_simgrid_msg_Host_isOn(JNIEnv * env, jobject jhost)
217 const_sg_host_t host = jhost_get_native(env, jhost);
220 jxbt_throw_notbound(env, "host", jhost);
224 return (jboolean)sg_host_is_on(host);
227 JNIEXPORT jobjectArray JNICALL Java_org_simgrid_msg_Host_getMountedStorage(JNIEnv * env, jobject jhost)
229 msg_host_t host = jhost_get_native(env, jhost);
234 jxbt_throw_notbound(env, "host", jhost);
240 std::unordered_map<std::string, sg_storage_t> mounted_storages = host->get_mounted_storages();
241 int count = mounted_storages.size();
242 jclass cls = env->FindClass("org/simgrid/msg/Storage");
244 jtable = env->NewObjectArray((jsize) count, cls, nullptr);
247 jxbt_throw_jni(env, "Storages table allocation failed");
251 for (auto const& elm : mounted_storages) {
252 jname = env->NewStringUTF(elm.second->get_cname());
253 jstorage = Java_org_simgrid_msg_Storage_getByName(env,cls,jname);
254 env->SetObjectArrayElement(jtable, index, jstorage);
260 JNIEXPORT jobjectArray JNICALL Java_org_simgrid_msg_Host_getAttachedStorage(JNIEnv * env, jobject jhost)
262 const_sg_host_t host = jhost_get_native(env, jhost);
265 jxbt_throw_notbound(env, "host", jhost);
270 xbt_dynar_t dyn = sg_host_get_attached_storage_list(host);
271 jclass cls = jxbt_get_class(env, "java/lang/String");
272 jtable = env->NewObjectArray(static_cast<jsize>(xbt_dynar_length(dyn)), cls, nullptr);
274 const char* storage_name;
275 jstring jstorage_name;
276 xbt_dynar_foreach (dyn, index, storage_name) {
277 jstorage_name = env->NewStringUTF(storage_name);
278 env->SetObjectArrayElement(jtable, index, jstorage_name);
280 xbt_dynar_free_container(&dyn);
284 JNIEXPORT jobjectArray JNICALL Java_org_simgrid_msg_Host_getStorageContent(JNIEnv * env, jobject jhost)
286 msg_host_t host = jhost_get_native(env, jhost);
289 jxbt_throw_notbound(env, "host", jhost);
292 return (jobjectArray)sg_host_get_storage_content(host);
295 JNIEXPORT jobjectArray JNICALL Java_org_simgrid_msg_Host_all(JNIEnv * env, jclass cls_arg)
297 sg_host_t* table = sg_host_list();
298 int count = sg_host_count();
300 jclass cls = jxbt_get_class(env, "org/simgrid/msg/Host");
304 jobjectArray jtable = env->NewObjectArray((jsize)count, cls, nullptr);
307 jxbt_throw_jni(env, "Hosts table allocation failed");
311 for (int index = 0; index < count; index++) {
312 jobject jhost = static_cast<jobject>(table[index]->extension(JAVA_HOST_LEVEL));
315 jstring jname = env->NewStringUTF(table[index]->get_cname());
316 jhost = Java_org_simgrid_msg_Host_getByName(env, cls_arg, jname);
319 env->SetObjectArrayElement(jtable, index, jhost);
325 JNIEXPORT void JNICALL Java_org_simgrid_msg_Host_setAsyncMailbox(JNIEnv * env, jclass cls_arg, jobject jname)
327 const char *name = env->GetStringUTFChars((jstring) jname, 0);
328 sg_mailbox_set_receiver(name);
329 env->ReleaseStringUTFChars((jstring) jname, name);
332 JNIEXPORT void JNICALL Java_org_simgrid_msg_Host_updateAllEnergyConsumptions(JNIEnv* env, jclass cls)
334 sg_host_energy_update_all();
337 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getConsumedEnergy (JNIEnv *env, jobject jhost)
339 const_sg_host_t host = jhost_get_native(env, jhost);
342 jxbt_throw_notbound(env, "host", jhost);
346 return sg_host_get_consumed_energy(host);
349 JNIEXPORT void JNICALL Java_org_simgrid_msg_Host_setPstate(JNIEnv* env, jobject jhost, jint pstate)
351 sg_host_t host = jhost_get_native(env, jhost);
352 sg_host_set_pstate(host, pstate);
354 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Host_getPstate(JNIEnv* env, jobject jhost)
356 const_sg_host_t host = jhost_get_native(env, jhost);
357 return sg_host_get_pstate(host);
359 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Host_getPstatesCount(JNIEnv* env, jobject jhost)
361 const_sg_host_t host = jhost_get_native(env, jhost);
362 return sg_host_get_nb_pstates(host);
364 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getCurrentPowerPeak(JNIEnv* env, jobject jhost)
366 const_sg_host_t host = jhost_get_native(env, jhost);
367 return sg_host_speed(host);
369 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getPowerPeakAt(JNIEnv* env, jobject jhost, jint pstate)
371 const_sg_host_t host = jhost_get_native(env, jhost);
372 return sg_host_get_pstate_speed(host, pstate);
375 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getLoad(JNIEnv* env, jobject jhost)
377 const_sg_host_t host = jhost_get_native(env, jhost);
378 return sg_host_load(host);
381 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getCurrentLoad (JNIEnv *env, jobject jhost)
383 const_sg_host_t host = jhost_get_native(env, jhost);
386 jxbt_throw_notbound(env, "host", jhost);
390 return sg_host_get_current_load(host);
393 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getComputedFlops (JNIEnv *env, jobject jhost)
395 const_sg_host_t host = jhost_get_native(env, jhost);
398 jxbt_throw_notbound(env, "host", jhost);
402 return sg_host_get_computed_flops(host);
405 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Host_getAvgLoad (JNIEnv *env, jobject jhost)
407 const_sg_host_t host = jhost_get_native(env, jhost);
410 jxbt_throw_notbound(env, "host", jhost);
414 return sg_host_get_avg_load(host);