Move java api to extras/

Change-Id: Ibd5cbbdfb22a235442cddaebc9eae9a3c4e35ec9
Signed-off-by: Damjan Marion <damarion@cisco.com>

2 files changed, 173 insertions, 0 deletions

diff --git a/extras/japi/java/jvpp-common/jvpp_common.c b/extras/japi/java/jvpp-common/jvpp_common.c
new file mode 100644
index 00000000000..2425607c582
--- /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];
+}
diff --git a/extras/japi/java/jvpp-common/jvpp_common.h b/extras/japi/java/jvpp-common/jvpp_common.h
new file mode 100644
index 00000000000..14027a96f78
--- /dev/null
+++ b/extras/japi/java/jvpp-common/jvpp_common.h
@@ -0,0 +1,74 @@
+/*
+ * 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.
+ */
+#ifndef __included_jvpp_common_h__
+#define __included_jvpp_common_h__
+//
+#include <vppinfra/types.h>
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+#include <jni.h>
+
+typedef struct {
+    /* Unique identifier used for matching replays with requests  */
+    volatile u32 context_id;
+
+    /* Spinlock */
+    volatile u32 lock;
+    u32 tag;
+
+    /* JNI Native Method Interface pointer for message handlers */
+    JNIEnv *jenv;
+
+    /* JNI Invoke Interface pointer for attachment of rx thread to java thread */
+    JavaVM *jvm;
+
+    /* Convenience */
+    svm_queue_t * vl_input_queue;
+    u32 my_client_index;
+    uword *messages_hash;
+} jvpp_main_t;
+
+extern jvpp_main_t jvpp_main __attribute__((aligned (64)));
+
+static_always_inline u32 vppjni_get_context_id(jvpp_main_t * jm) {
+    return __sync_add_and_fetch(&jm->context_id, 1);
+}
+
+static_always_inline void vppjni_lock(jvpp_main_t * jm, u32 tag) {
+    while (__sync_lock_test_and_set(&jm->lock, 1))
+        ;
+    jm->tag = tag;
+}
+
+static_always_inline void vppjni_unlock(jvpp_main_t * jm) {
+    jm->tag = 0;
+    CLIB_MEMORY_BARRIER();
+    jm->lock = 0;
+}
+
+/**
+ * Calls onError callback on callbackObject reference. Passes instance of callbackExceptionClass as parameter.
+ */
+void call_on_error(const char* callName, int contextId, int retval,
+        jclass callbackClass, jobject callbackObject,
+        jclass callbackExceptionClass);
+
+/**
+ * Retrieves message id based on message name and crc (key format: name_crc).
+ * Throws java/lang/IllegalStateException on failure.
+ */
+u32 get_message_id(JNIEnv *env, const char* key);
+
+#endif /* __included_jvpp_common_h__ */