def attach(self,
pjvm: Optional[object] = None): # -> Tuple['_JVM', jni.JNIEnv]:
if_bind = pjvm is not None
try:
if if_bind and not pjvm:
raise JVMException(EStatusCode.EINVAL,
"First paramter must be a JNI jvm handle")
penv = jni.obj(jni.POINTER(jni.JNIEnv))
if if_bind:
self._jvm.jnijvm = jni.cast(pjvm, jni.POINTER(jni.JavaVM))[0]
self._jvm.jnijvm.AttachCurrentThread(penv)
else:
self._jvm.jnijvm.GetEnv(penv, JVM.JNI_VERSION)
jenv = jni.JEnv(penv)
self._jvm._initialize(jenv)
return self._jvm, jenv
except Exception as exc:
try:
self.handleException(exc)
finally:
if if_bind:
self._jvm.jnijvm = None
def start(self, *jvmoptions, **jvmargs):
ignoreUnrecognized = jvmargs.get("ignoreUnrecognized", True)
try:
pjvm = jni.obj(jni.POINTER(jni.JavaVM))
penv = jni.obj(jni.POINTER(jni.JNIEnv))
jvm_args = jni.obj(jni.JavaVMInitArgs)
jvm_args.version = JVM.JNI_VERSION
jvm_args.nOptions = len(jvmoptions)
jvm_args.options = joptions = jni.new_array(
jni.JavaVMOption, jvm_args.nOptions)
_keep = []
for i, option in enumerate(jvmoptions):
optionString = jni.new_cstr(option if isinstance(
option, bytes) else str(option).encode("utf-8"))
_keep.append(optionString)
jvm_args.options[i].optionString = optionString
jvm_args.options[i].extraInfo = jni.NULL
jvm_args.ignoreUnrecognized = jni.JNI_TRUE if ignoreUnrecognized else jni.JNI_FALSE
err = self._JNI.CreateJavaVM(pjvm, penv, jvm_args)
del _keep, joptions, jvm_args
if err != jni.JNI_OK or jni.isNULL(pjvm):
raise jni.JNIException(
err if err != jni.JNI_OK else jni.JNI_ERR,
info="JNI_CreateJavaVM")
self._jnijvm = jni.JVM(pjvm)
return self._jnijvm, jni.JEnv(penv)
except Exception as exc:
try:
self.handleException(exc)
finally:
self._jnijvm = None
def attachThread(self, daemon: bool = False):
try:
penv = jni.obj(jni.POINTER(jni.JNIEnv))
if not daemon:
self._jvm.jnijvm.AttachCurrentThread(penv)
else:
self._jvm.jnijvm.AttachCurrentThreadAsDaemon(penv)
return self._jvm, jni.JEnv(penv)
except Exception as exc:
self.handleException(exc)
def __enter__(self):
if self._jvm is None:
raise JVMException(
EStatusCode.EDETACHED,
"Unable to use JVM: thread detached from the VM")
if self._jvm.jnijvm:
penv = jni.obj(jni.POINTER(jni.JNIEnv))
self._jvm.jnijvm.AttachCurrentThread(penv)
return self._jvm, jni.JEnv(penv)
else:
return self._jvm, None
def shutdown(self):
if self._jvm.jnijvm is None: return
try:
penv = jni.obj(jni.POINTER(jni.JNIEnv))
self._jvm.jnijvm.AttachCurrentThread(penv)
jenv = jni.JEnv(penv)
self._jvm._dispose(jenv)
self._jvm.jnijvm.DestroyJavaVM()
except Exception as exc:
try:
self.handleException(exc)
finally:
self._jvm.jnijvm = None
def start(self, *jvmoptions, **jvmargs): # -> Tuple['_JVM', jni.JNIEnv]:
jvmoptions = tuple([
"-Djava.class.path=" + os.pathsep.join([
item.partition("=")[2] for item in jvmoptions
if item.lstrip().startswith("-Djava.class.path=")
] + [str(path) for path in INTERNAL_CLASSPATHS])
] + [
item for item in jvmoptions
if not item.lstrip().startswith("-Djava.class.path=")
])
ignoreUnrecognized = jvmargs.get("ignoreUnrecognized", True)
try:
pjvm = jni.obj(jni.POINTER(jni.JavaVM))
penv = jni.obj(jni.POINTER(jni.JNIEnv))
jvm_args = jni.obj(jni.JavaVMInitArgs)
jvm_args.version = JVM.JNI_VERSION
jvm_args.nOptions = len(jvmoptions)
jvm_args.options = joptions = jni.new_array(
jni.JavaVMOption, jvm_args.nOptions)
_keep = []
for i, option in enumerate(jvmoptions):
optionString = jni.new_cstr(option if isinstance(
option, bytes) else str(option).encode("utf-8"))
_keep.append(optionString)
jvm_args.options[i].optionString = optionString
jvm_args.options[i].extraInfo = jni.NULL
jvm_args.ignoreUnrecognized = jni.JNI_TRUE if ignoreUnrecognized else jni.JNI_FALSE
err = self._jvm.JNI.CreateJavaVM(pjvm, penv, jvm_args)
del _keep, joptions, jvm_args
if err != jni.JNI_OK or jni.isNULL(pjvm):
raise jni.JNIException(
err if err != jni.JNI_OK else jni.JNI_ERR,
info="JNI_CreateJavaVM")
self._jvm.jnijvm = jni.JVM(pjvm)
jenv = jni.JEnv(penv)
try:
self._jvm._initialize(jenv)
except Exception as exc:
try:
self._jvm.jnijvm.DestroyJavaVM()
except Exception:
pass
raise exc
return self._jvm, jenv
except Exception as exc:
try:
self.handleException(exc)
finally:
self._jvm.jnijvm = None