Move java api to extras/

[vpp.git] / extras / japi / java / jvpp-common / jvpp_common.c

diff --git a/extras/japi/java/jvpp-common/jvpp_common.c b/extras/japi/java/jvpp-common/jvpp_common.c
new file mode 100644 (file)
index 0000000..2425607
--- /dev/null
+++ b/extras/japi/java/jvpp-common/jvpp_common.c
@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#define _GNU_SOURCE /* for strcasestr(3) */
+
+#include <vnet/api_errno.h>
+#include "jvpp_common.h"
+
+#ifndef JVPP_DEBUG
+#define JVPP_DEBUG 0
+#endif
+
+#if JVPP_DEBUG == 1
+#define DEBUG_LOG(...) clib_warning(__VA_ARGS__)
+#else
+#define DEBUG_LOG(...)
+#endif
+
+#define _(error,errorCode,msg)  \
+if (errorCode == code)          \
+    message = msg;              \
+else
+
+#define get_error_message(errno)    \
+int code = errno;                   \
+foreach_vnet_api_error              \
+    message = "Reason unknown";
+
+/* shared jvpp main structure */
+jvpp_main_t jvpp_main __attribute__((aligned (64)));
+
+void call_on_error(const char* callName, int contextId, int retval,
+        jclass callbackClass, jobject callbackObject,
+        jclass callbackExceptionClass) {
+    DEBUG_LOG("\nCallOnError : callback=%s, retval=%d, context=%d\n", callName,
+            clib_net_to_host_u32(retval), clib_net_to_host_u32(context));
+    JNIEnv *env = jvpp_main.jenv;
+    if (!callbackClass) {
+        DEBUG_LOG("CallOnError : jm->callbackClass is null!\n");
+        return;
+    }
+    jmethodID excConstructor = (*env)->GetMethodID(env, callbackExceptionClass,
+            "<init>", "(Ljava/lang/String;Ljava/lang/String;II)V");
+    if (!excConstructor) {
+        DEBUG_LOG("CallOnError : excConstructor is null!\n");
+        return;
+    }
+    jmethodID callbackExcMethod = (*env)->GetMethodID(env, callbackClass,
+            "onError", "(Lio/fd/vpp/jvpp/VppCallbackException;)V");
+    if (!callbackExcMethod) {
+        DEBUG_LOG("CallOnError : callbackExcMethod is null!\n");
+        return;
+    }
+
+    char *message;
+    get_error_message(clib_net_to_host_u32(retval));
+    jobject excObject = (*env)->NewObject(env, callbackExceptionClass,
+            excConstructor, (*env)->NewStringUTF(env, callName),
+            (*env)->NewStringUTF(env, message),
+            clib_net_to_host_u32(contextId), clib_net_to_host_u32(retval));
+    if (!excObject) {
+        DEBUG_LOG("CallOnError : excObject is null!\n");
+        return;
+    }
+
+    (*env)->CallVoidMethod(env, callbackObject, callbackExcMethod, excObject);
+    DEBUG_LOG("CallOnError : Response sent\n");
+}
+#undef _
+
+u32 get_message_id(JNIEnv *env, const char *key) {
+    uword *p = hash_get(jvpp_main.messages_hash, key);
+    if (!p) {
+        jclass exClass = (*env)->FindClass(env, "java/lang/IllegalStateException");
+        char *msgBuf  = clib_mem_alloc(strlen(key) + 70);
+        strcpy(msgBuf, "API mismatch detected: ");
+        strcat(msgBuf, key);
+        strcat(msgBuf, " is missing in global name_crc hash table.");
+        DEBUG_LOG("%s", msgBuf);
+        DEBUG_LOG("Possible reasons:");
+        DEBUG_LOG("1) incompatible VPP version used");
+        DEBUG_LOG("2) message present in JSON file but not in global name_crc table");
+        (*env)->ThrowNew(env, exClass, msgBuf);
+        clib_mem_free(msgBuf);
+        return 0;
+    }
+    return (u32) p[0];
+}