Introducing Java Servlet Container beta.

src/java/nxt_jni_URLClassLoader.c

@@ -0,0 +1,187 @@
+
+/*
+ * Copyright (C) NGINX, Inc.
+ */
+
+#include <nxt_unit.h>
+#include <jni.h>
+
+#include "nxt_jni_URLClassLoader.h"
+
+
+static jclass     nxt_java_URLClassLoader_class;
+static jmethodID  nxt_java_URLClassLoader_ctor;
+static jmethodID  nxt_java_URLClassLoader_parent_ctor;
+static jmethodID  nxt_java_URLClassLoader_loadClass;
+static jmethodID  nxt_java_URLClassLoader_addURL;
+
+static jclass     nxt_java_URL_class;
+static jmethodID  nxt_java_URL_ctor;
+
+
+int
+nxt_java_initURLClassLoader(JNIEnv *env)
+{
+    jclass  cls;
+
+    cls = (*env)->FindClass(env, "java/net/URLClassLoader");
+    if (cls == NULL) {
+        nxt_unit_warn(NULL, "java.net.URLClassLoader not found");
+        return NXT_UNIT_ERROR;
+    }
+
+    nxt_java_URLClassLoader_class = (*env)->NewGlobalRef(env, cls);
+    (*env)->DeleteLocalRef(env, cls);
+    cls = nxt_java_URLClassLoader_class;
+
+    nxt_java_URLClassLoader_ctor = (*env)->GetMethodID(env, cls,
+        "<init>", "([Ljava/net/URL;)V");
+    if (nxt_java_URLClassLoader_ctor == NULL) {
+        nxt_unit_warn(NULL, "java.net.URLClassLoader constructor not found");
+        goto failed;
+    }
+
+    nxt_java_URLClassLoader_parent_ctor = (*env)->GetMethodID(env, cls,
+        "<init>", "([Ljava/net/URL;Ljava/lang/ClassLoader;)V");
+    if (nxt_java_URLClassLoader_ctor == NULL) {
+        nxt_unit_warn(NULL, "java.net.URLClassLoader constructor not found");
+        goto failed;
+    }
+
+    nxt_java_URLClassLoader_loadClass = (*env)->GetMethodID(env, cls,
+        "loadClass", "(Ljava/lang/String;)Ljava/lang/Class;");
+    if (nxt_java_URLClassLoader_loadClass == NULL) {
+        nxt_unit_warn(NULL, "java.net.URLClassLoader.loadClass not found");
+        goto failed;
+    }
+
+    nxt_java_URLClassLoader_addURL = (*env)->GetMethodID(env, cls,
+        "addURL", "(Ljava/net/URL;)V");
+    if (nxt_java_URLClassLoader_addURL == NULL) {
+        nxt_unit_warn(NULL, "java.net.URLClassLoader.addURL not found");
+        goto failed;
+    }
+
+    cls = (*env)->FindClass(env, "java/net/URL");
+    if (cls == NULL) {
+        nxt_unit_warn(NULL, "java.net.URL not found");
+        return NXT_UNIT_ERROR;
+    }
+
+    nxt_java_URL_class = (*env)->NewGlobalRef(env, cls);
+    (*env)->DeleteLocalRef(env, cls);
+    cls = nxt_java_URL_class;
+
+    nxt_java_URL_ctor = (*env)->GetMethodID(env, cls,
+        "<init>", "(Ljava/lang/String;)V");
+    if (nxt_java_URL_ctor == NULL) {
+        nxt_unit_warn(NULL, "java.net.URL constructor not found");
+        goto failed;
+    }
+
+    return NXT_UNIT_OK;
+
+failed:
+
+    (*env)->DeleteGlobalRef(env, cls);
+    return NXT_UNIT_ERROR;
+}
+
+
+jobject
+nxt_java_newURLClassLoader(JNIEnv *env, int url_count, char **urls)
+{
+    jobjectArray  jurls;
+
+    jurls = nxt_java_newURLs(env, url_count, urls);
+    if (jurls == NULL) {
+        return NULL;
+    }
+
+    return (*env)->NewObject(env, nxt_java_URLClassLoader_class,
+                             nxt_java_URLClassLoader_ctor, jurls);
+}
+
+
+jobject
+nxt_java_newURLClassLoader_parent(JNIEnv *env, int url_count, char **urls,
+    jobject parent)
+{
+    jobjectArray  jurls;
+
+    jurls = nxt_java_newURLs(env, url_count, urls);
+    if (jurls == NULL) {
+        return NULL;
+    }
+
+    return (*env)->NewObject(env, nxt_java_URLClassLoader_class,
+                             nxt_java_URLClassLoader_parent_ctor, jurls,
+                             parent);
+}
+
+
+jobjectArray
+nxt_java_newURLs(JNIEnv *env, int url_count, char **urls)
+{
+    int           i;
+    jstring       surl;
+    jobject       jurl;
+    jobjectArray  jurls;
+
+    jurls = (*env)->NewObjectArray(env, url_count, nxt_java_URL_class, NULL);
+    if (jurls == NULL) {
+        return NULL;
+    }
+
+    for (i = 0; i < url_count; i++) {
+        surl = (*env)->NewStringUTF(env, urls[i]);
+        if (surl == NULL) {
+            return NULL;
+        }
+
+        jurl = (*env)->NewObject(env, nxt_java_URL_class, nxt_java_URL_ctor,
+                                 surl);
+        if (jurl == NULL) {
+            return NULL;
+        }
+
+        (*env)->SetObjectArrayElement(env, jurls, i, jurl);
+    }
+
+    return jurls;
+}
+
+
+jclass
+nxt_java_loadClass(JNIEnv *env, jobject cl, const char *name)
+{
+    jstring  jname;
+
+    jname = (*env)->NewStringUTF(env, name);
+    if (jname == NULL) {
+        return NULL;
+    }
+
+    return (*env)->CallObjectMethod(env, cl, nxt_java_URLClassLoader_loadClass,
+                                    jname);
+}
+
+
+void
+nxt_java_addURL(JNIEnv *env, jobject cl, const char *url)
+{
+    jstring  surl;
+    jobject  jurl;
+
+    surl = (*env)->NewStringUTF(env, url);
+    if (surl == NULL) {
+        return;
+    }
+
+    jurl = (*env)->NewObject(env, nxt_java_URL_class, nxt_java_URL_ctor, surl);
+    if (jurl == NULL) {
+        return;
+    }
+
+    (*env)->CallVoidMethod(env, cl, nxt_java_URLClassLoader_addURL, jurl);
+}