blob: f8d6db689e93d4a016413b507d3f181cd691586b [file] [log] [blame]
/* Copyright (c) 2013 Stanford University
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR(S) DISCLAIM ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL AUTHORS BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <RamCloud.h>
#include <TableEnumerator.h>
#include <Object.h>
#include "edu_stanford_ramcloud_JRamCloud.h"
#include "edu_stanford_ramcloud_JRamCloud_TableEnumerator.h"
using namespace RAMCloud;
/// Our JRamCloud java library is packaged under "edu.stanford.ramcloud".
/// We will need this when using FindClass, etc.
#define PACKAGE_PATH "edu/stanford/ramcloud/"
#define check_null(var, msg) \
if (var == NULL) { \
throw Exception(HERE, "JRamCloud: NULL returned: " msg "\n"); \
}
/**
* This class provides a simple means of extracting C-style strings
* from a jstring and cleans up when the destructor is called. This
* avoids having to manually do the annoying GetStringUTFChars /
* ReleaseStringUTFChars dance.
*/
class JStringGetter {
public:
JStringGetter(JNIEnv* env, jstring jString)
: env(env)
, jString(jString)
, string(env->GetStringUTFChars(jString, 0))
{
check_null(string, "GetStringUTFChars failed");
}
~JStringGetter()
{
if (string != NULL)
env->ReleaseStringUTFChars(jString, string);
}
private:
JNIEnv* env;
jstring jString;
public:
const char* const string;
};
/**
* This class provides a simple means of accessing jbyteArrays as
* C-style void* buffers and cleans up when the destructor is called.
* This avoids having to manually do the annoying GetByteArrayElements /
* ReleaseByteArrayElements dance.
*/
class JByteArrayGetter {
public:
JByteArrayGetter(JNIEnv* env, jbyteArray jByteArray)
: env(env)
, jByteArray(jByteArray)
, pointer(static_cast<void*>(env->GetByteArrayElements(jByteArray, 0)))
, length(env->GetArrayLength(jByteArray))
{
check_null(pointer, "GetByteArrayElements failed");
}
~JByteArrayGetter()
{
if (pointer != NULL) {
env->ReleaseByteArrayElements(jByteArray,
reinterpret_cast<jbyte*>(pointer),
0);
}
}
private:
JNIEnv* env;
jbyteArray jByteArray;
public:
void* const pointer;
const jsize length;
};
class JByteArrayReference {
public:
JByteArrayReference(JNIEnv* env, jbyteArray jByteArray)
: env(env)
, jByteArray(jByteArray)
, pointer(static_cast<const void*>(env->GetByteArrayElements(jByteArray, 0)))
, length(env->GetArrayLength(jByteArray))
{
check_null(pointer, "GetByteArrayElements failed");
}
~JByteArrayReference()
{
if (pointer != NULL) {
env->ReleaseByteArrayElements(jByteArray,
(jbyte*)pointer,
JNI_ABORT);
}
}
private:
JNIEnv* env;
jbyteArray jByteArray;
public:
const void* const pointer;
const jsize length;
};
static RamCloud*
getRamCloud(JNIEnv* env, jobject jRamCloud)
{
const static jclass cls = (jclass)env->NewGlobalRef(env->FindClass(PACKAGE_PATH "JRamCloud"));
const static jfieldID fieldId = env->GetFieldID(cls, "ramcloudObjectPointer", "J");
return reinterpret_cast<RamCloud*>(env->GetLongField(jRamCloud, fieldId));
}
static TableEnumerator*
getTableEnumerator(JNIEnv* env, jobject jTableEnumerator)
{
const static jclass cls = (jclass)env->NewGlobalRef(env->FindClass(PACKAGE_PATH "JRamCloud$TableEnumerator"));
const static jfieldID fieldId = env->GetFieldID(cls, "tableEnumeratorObjectPointer", "J");
return reinterpret_cast<TableEnumerator*>(env->GetLongField(jTableEnumerator, fieldId));
}
static void
createException(JNIEnv* env, jobject jRamCloud, const char* name)
{
// Need to specify the full class name, including the package. To make it
// slightly more complicated, our exceptions are nested under the JRamCloud
// class.
string fullName = PACKAGE_PATH;
fullName += "JRamCloud$";
fullName += name;
// This would be much easier if we didn't make our Exception classes nested
// under JRamCloud since env->ThrowNew() could be used instead. The problem
// is that ThrowNew assumes a particular method signature that happens to
// be incompatible with the nested classes' signatures.
jclass cls = env->FindClass(fullName.c_str());
check_null(cls, "FindClass failed");
jmethodID methodId = env->GetMethodID(cls,
"<init>",
"(L" PACKAGE_PATH "JRamCloud;Ljava/lang/String;)V");
check_null(methodId, "GetMethodID failed");
jstring jString = env->NewStringUTF("");
check_null(jString, "NewStringUTF failed");
jthrowable exception = reinterpret_cast<jthrowable>(
env->NewObject(cls, methodId, jRamCloud, jString));
check_null(exception, "NewObject failed");
env->Throw(exception);
}
/**
* This macro is used to catch C++ exceptions and convert them into Java
* exceptions. Be sure to wrap the individual RamCloud:: calls in try blocks,
* rather than the entire methods, since doing so with functions that return
* non-void is a bad idea with undefined(?) behaviour.
*
* _returnValue is the value that should be returned from the JNI function
* when an exception is caught and generated in Java. As far as I can tell,
* the exception fires immediately upon returning from the JNI method. I
* don't think anything else would make sense, but the JNI docs kind of
* suck.
*/
#define EXCEPTION_CATCHER(_returnValue) \
catch (TableDoesntExistException& e) { \
createException(env, jRamCloud, "TableDoesntExistException"); \
return _returnValue; \
} catch (ObjectDoesntExistException& e) { \
createException(env, jRamCloud, "ObjectDoesntExistException"); \
return _returnValue; \
} catch (ObjectExistsException& e) { \
createException(env, jRamCloud, "ObjectExistsException"); \
return _returnValue; \
} catch (WrongVersionException& e) { \
createException(env, jRamCloud, "WrongVersionException"); \
return _returnValue; \
} catch (RejectRulesException& e) { \
createException(env, jRamCloud, "RejectRulesException"); \
return _returnValue; \
} catch (InvalidObjectException& e) { \
createException(env, jRamCloud, "InvalidObjectException"); \
return _returnValue; \
}
/*
* Class: edu_stanford_ramcloud_JRamCloud
* Method: connect
* Signature: (Ljava/lang/String;)J
*/
JNIEXPORT jlong
JNICALL Java_edu_stanford_ramcloud_JRamCloud_connect(JNIEnv *env,
jclass jRamCloud,
jstring coordinatorLocator)
{
JStringGetter locator(env, coordinatorLocator);
RamCloud* ramcloud = NULL;
try {
ramcloud = new RamCloud(locator.string);
} EXCEPTION_CATCHER(NULL);
return reinterpret_cast<jlong>(ramcloud);
}
/*
* Class: edu_stanford_ramcloud_JRamCloud
* Method: disconnect
* Signature: (J)V
*/
JNIEXPORT void
JNICALL Java_edu_stanford_ramcloud_JRamCloud_disconnect(JNIEnv *env,
jclass jRamCloud,
jlong ramcloudObjectPointer)
{
delete reinterpret_cast<RamCloud*>(ramcloudObjectPointer);
}
/*
* Class: edu_stanford_ramcloud_JRamCloud
* Method: createTable
* Signature: (Ljava/lang/String;)I
*/
JNIEXPORT jlong
JNICALL Java_edu_stanford_ramcloud_JRamCloud_createTable__Ljava_lang_String_2(JNIEnv *env,
jobject jRamCloud,
jstring jTableName)
{
return Java_edu_stanford_ramcloud_JRamCloud_createTable__Ljava_lang_String_2I(env,
jRamCloud,
jTableName,
1);
}
/*
* Class: edu_stanford_ramcloud_JRamCloud
* Method: createTable
* Signature: (Ljava/lang/String;I)I
*/
JNIEXPORT jlong
JNICALL Java_edu_stanford_ramcloud_JRamCloud_createTable__Ljava_lang_String_2I(JNIEnv *env,
jobject jRamCloud,
jstring jTableName,
jint jServerSpan)
{
RamCloud* ramcloud = getRamCloud(env, jRamCloud);
JStringGetter tableName(env, jTableName);
uint64_t tableId;
try {
tableId = ramcloud->createTable(tableName.string, jServerSpan);
} EXCEPTION_CATCHER(-1);
return static_cast<jlong>(tableId);
}
/*
* Class: edu_stanford_ramcloud_JRamCloud
* Method: dropTable
* Signature: (Ljava/lang/String;)I
*/
JNIEXPORT void
JNICALL Java_edu_stanford_ramcloud_JRamCloud_dropTable(JNIEnv *env,
jobject jRamCloud,
jstring jTableName)
{
RamCloud* ramcloud = getRamCloud(env, jRamCloud);
JStringGetter tableName(env, jTableName);
try {
ramcloud->dropTable(tableName.string);
} EXCEPTION_CATCHER();
}
/*
* Class: edu_stanford_ramcloud_JRamCloud
* Method: getTableId
* Signature: (Ljava/lang/String;)J
*/
JNIEXPORT jlong
JNICALL Java_edu_stanford_ramcloud_JRamCloud_getTableId(JNIEnv *env,
jobject jRamCloud,
jstring jTableName)
{
RamCloud* ramcloud = getRamCloud(env, jRamCloud);
JStringGetter tableName(env, jTableName);
uint64_t tableId;
try {
tableId = ramcloud->getTableId(tableName.string);
} EXCEPTION_CATCHER(-1);
return tableId;
}
/*
* Class: edu_stanford_ramcloud_JRamCloud
* Method: read
* Signature: (J[B)LJRamCloud/Object;
*/
JNIEXPORT jobject
JNICALL Java_edu_stanford_ramcloud_JRamCloud_read__J_3B(JNIEnv *env,
jobject jRamCloud,
jlong jTableId,
jbyteArray jKey)
{
RamCloud* ramcloud = getRamCloud(env, jRamCloud);
JByteArrayReference key(env, jKey);
Buffer buffer;
uint64_t version;
try {
ramcloud->read(jTableId, key.pointer, key.length, &buffer, NULL, &version);
} EXCEPTION_CATCHER(NULL);
jbyteArray jValue = env->NewByteArray(buffer.getTotalLength());
check_null(jValue, "NewByteArray failed");
JByteArrayGetter value(env, jValue);
buffer.copy(0, buffer.getTotalLength(), value.pointer);
// Note that using 'javap -s' on the class file will print out the method
// signatures (the third argument to GetMethodID).
const static jclass cls = (jclass)env->NewGlobalRef(env->FindClass(PACKAGE_PATH "JRamCloud$Object"));
check_null(cls, "FindClass failed");
const static jmethodID methodId = env->GetMethodID(cls,
"<init>",
"(L" PACKAGE_PATH "JRamCloud;[B[BJ)V");
check_null(methodId, "GetMethodID failed");
return env->NewObject(cls,
methodId,
jRamCloud,
jKey,
jValue,
static_cast<jlong>(version));
}
/*
* Class: edu_stanford_ramcloud_JRamCloud
* Method: read
* Signature: (J[BLJRamCloud/RejectRules;)LJRamCloud/Object;
*/
JNIEXPORT jobject
JNICALL Java_edu_stanford_ramcloud_JRamCloud_read__J_3BLJRamCloud_RejectRules_2(JNIEnv *env,
jobject jRamCloud,
jlong jTableId,
jbyteArray jKey,
jobject jRejectRules)
{
// XXX-- implement me by generalising the other read() method.
return NULL;
}
/*
* Class: edu_stanford_ramcloud_JRamCloud
* Method: multiRead
* Signature: ([Ledu/stanford/ramcloud/JRamCloud$multiReadObject;I)[Ledu/stanford/ramcloud/JRamCloud$Object;
*/
JNIEXPORT jobjectArray
JNICALL Java_edu_stanford_ramcloud_JRamCloud_multiRead(JNIEnv *env,
jobject jRamCloud,
jobjectArray jmultiReadArray){
RamCloud* ramcloud = getRamCloud(env, jRamCloud);
const jint requestNum = env->GetArrayLength(jmultiReadArray);
MultiReadObject objects[requestNum];
Tub<Buffer> values[requestNum];
jbyteArray jKey[requestNum];
MultiReadObject* requests[requestNum];
const static jclass jc_multiReadObject = (jclass)env->NewGlobalRef(env->FindClass(PACKAGE_PATH "JRamCloud$multiReadObject"));
const static jfieldID jf_tableId = env->GetFieldID(jc_multiReadObject, "tableId", "J");
const static jfieldID jf_key = env->GetFieldID(jc_multiReadObject, "key", "[B");
for (int i = 0 ; i < requestNum ; i++){
jobject obj = env->GetObjectArrayElement(jmultiReadArray, i);
check_null(obj, "GetObjectArrayElement failed");
jlong jTableId = env->GetLongField(obj, jf_tableId);
jKey[i] = (jbyteArray)env->GetObjectField(obj, jf_key);
jbyte* data = env->GetByteArrayElements(jKey[i], NULL);
check_null(data, "GetByteArrayElements failed");
objects[i].tableId = jTableId;
objects[i].key = data;
objects[i].keyLength = env->GetArrayLength(jKey[i]);
objects[i].value = &values[i];
requests[i] = &objects[i];
}
try {
ramcloud->multiRead(requests, requestNum);
} EXCEPTION_CATCHER(NULL);
const static jclass jc_RcObject = (jclass)env->NewGlobalRef(env->FindClass(PACKAGE_PATH "JRamCloud$Object"));
check_null(jc_RcObject, "FindClass failed");
const static jmethodID jm_init = env->GetMethodID(jc_RcObject,
"<init>",
"(L" PACKAGE_PATH "JRamCloud;[B[BJ)V");
jobjectArray outJNIArray = env->NewObjectArray(requestNum, jc_RcObject , NULL);
check_null(outJNIArray, "NewObjectArray failed");
for (int i = 0 ; i < requestNum ; i++) {
if (objects[i].status == 0) {
jbyteArray jValue = env->NewByteArray(values[i].get()->getTotalLength());
check_null(jValue, "NewByteArray failed");
JByteArrayGetter value(env, jValue);
values[i].get()->copy(0, values[i].get()->getTotalLength(), value.pointer);
jobject obj = env->NewObject(jc_RcObject, jm_init, jRamCloud, jKey[i], jValue);
check_null(obj, "NewObject failed");
env->SetObjectArrayElement(outJNIArray, i, obj);
}
// keys are read only so no need to copy back to Java side: JNI_ABORT
env->ReleaseByteArrayElements(jKey[i], (jbyte *) objects[i].key, JNI_ABORT);
}
return outJNIArray;
}
/*
* Class: edu_stanford_ramcloud_JRamCloud
* Method: remove
* Signature: (J[B)J
*/
JNIEXPORT jlong
JNICALL Java_edu_stanford_ramcloud_JRamCloud_remove__J_3B(JNIEnv *env,
jobject jRamCloud,
jlong jTableId,
jbyteArray jKey)
{
RamCloud* ramcloud = getRamCloud(env, jRamCloud);
JByteArrayReference key(env, jKey);
uint64_t version;
try {
ramcloud->remove(jTableId, key.pointer, key.length, NULL, &version);
} EXCEPTION_CATCHER(-1);
return static_cast<jlong>(version);
}
// Workaround for javah generating incorrect signature for inner class
// 00024 is an escaped signature for $ character
#ifdef __cplusplus
extern "C" {
#endif
JNIEXPORT jlong JNICALL Java_edu_stanford_ramcloud_JRamCloud_remove__J_3BLedu_stanford_ramcloud_JRamCloud_00024RejectRules_2
(JNIEnv *, jobject, jlong, jbyteArray, jobject);
#ifdef __cplusplus
}
#endif
/*
* Class: edu_stanford_ramcloud_JRamCloud
* Method: remove
* Signature: (J[BLedu/stanford/ramcloud/JRamCloud/$RejectRules;)J
*/
JNIEXPORT jlong
JNICALL Java_edu_stanford_ramcloud_JRamCloud_remove__J_3BLedu_stanford_ramcloud_JRamCloud_00024RejectRules_2(JNIEnv *env,
jobject jRamCloud,
jlong jTableId,
jbyteArray jKey,
jobject jRejectRules)
{
// XXX- handle RejectRules
RamCloud* ramcloud = getRamCloud(env, jRamCloud);
JByteArrayReference key(env, jKey);
uint64_t version;
try {
ramcloud->remove(jTableId, key.pointer, key.length, NULL, &version);
} EXCEPTION_CATCHER(-1);
return static_cast<jlong>(version);
}
/*
* Class: edu_stanford_ramcloud_JRamCloud
* Method: write
* Signature: (J[B[B)J
*/
JNIEXPORT jlong
JNICALL Java_edu_stanford_ramcloud_JRamCloud_write__J_3B_3B(JNIEnv *env,
jobject jRamCloud,
jlong jTableId,
jbyteArray jKey,
jbyteArray jValue)
{
RamCloud* ramcloud = getRamCloud(env, jRamCloud);
JByteArrayReference key(env, jKey);
JByteArrayGetter value(env, jValue);
uint64_t version;
try {
ramcloud->write(jTableId,
key.pointer, key.length,
value.pointer, value.length,
NULL,
&version);
} EXCEPTION_CATCHER(-1);
return static_cast<jlong>(version);
}
/*
* Class: edu_stanford_ramcloud_JRamCloud
* Method: write
* Signature: (J[B[BLJRamCloud/RejectRules;)J
*/
JNIEXPORT jlong
JNICALL Java_edu_stanford_ramcloud_JRamCloud_write__J_3B_3BLJRamCloud_RejectRules_2(JNIEnv *env,
jobject jRamCloud,
jlong jTableId,
jbyteArray jKey,
jbyteArray jValue,
jobject jRejectRules)
{
// XXX- handle RejectRules
RamCloud* ramcloud = getRamCloud(env, jRamCloud);
JByteArrayReference key(env, jKey);
JByteArrayGetter value(env, jValue);
RejectRules rules;
jclass ruleClass = env->GetObjectClass(jRejectRules);
jfieldID fid = env->GetFieldID(ruleClass, "doesntExist", "Z");
rules.doesntExist = (uint8_t) env->GetBooleanField(jRejectRules, fid);
fid = env->GetFieldID(ruleClass, "exists", "Z");
rules.exists = (uint8_t) env->GetBooleanField(jRejectRules, fid);
fid = env->GetFieldID(ruleClass, "givenVersion", "J");
rules.givenVersion = env->GetLongField(jRejectRules, fid);
fid = env->GetFieldID(ruleClass, "versionLeGiven", "Z");
rules.versionLeGiven = (uint8_t) env->GetBooleanField(jRejectRules, fid);
fid = env->GetFieldID(ruleClass, "versionNeGiven", "Z");
rules.versionNeGiven = (uint8_t) env->GetBooleanField(jRejectRules, fid);
uint64_t version;
try {
ramcloud->write(jTableId,
key.pointer, key.length,
value.pointer, value.length,
&rules,
&version);
}
EXCEPTION_CATCHER(-1);
return static_cast<jlong> (version);
}
JNIEXPORT jlong
JNICALL Java_edu_stanford_ramcloud_JRamCloud_writeRule(JNIEnv *env,
jobject jRamCloud,
jlong jTableId,
jbyteArray jKey,
jbyteArray jValue,
jobject jRejectRules) {
RamCloud* ramcloud = getRamCloud(env, jRamCloud);
JByteArrayReference key(env, jKey);
JByteArrayGetter value(env, jValue);
uint64_t version;
RejectRules rules = {};
const static jclass jc_RejectRules = (jclass)env->NewGlobalRef(env->FindClass(PACKAGE_PATH "JRamCloud$RejectRules"));
const static jfieldID jf_doesntExist = env->GetFieldID(jc_RejectRules, "doesntExist", "Z");
check_null(jf_doesntExist, "doesentExist field id is null");
jboolean ruleBool;
ruleBool = env->GetBooleanField(jRejectRules, jf_doesntExist);
rules.doesntExist = ruleBool ? 1 : 0;
const static jfieldID jf_exists = env->GetFieldID(jc_RejectRules, "exists", "Z");
check_null(jf_exists, "exists field id is null");
ruleBool = env->GetBooleanField(jRejectRules, jf_exists);
rules.exists = ruleBool ? 1 : 0;
const static jfieldID jf_givenVersion = env->GetFieldID(jc_RejectRules, "givenVersion", "J");
check_null(jf_givenVersion, "givenVersion field id is null");
rules.givenVersion = env->GetLongField(jRejectRules, jf_givenVersion);
const static jfieldID jf_versionLeGiven = env->GetFieldID(jc_RejectRules, "versionLeGiven", "Z");
check_null(jf_versionLeGiven, "versionLeGiven field id is null");
ruleBool = env->GetBooleanField(jRejectRules, jf_versionLeGiven);
rules.versionLeGiven = ruleBool ? 1 : 0;
const static jfieldID jf_versionNeGiven = env->GetFieldID(jc_RejectRules, "versionNeGiven", "Z");
check_null(jf_versionNeGiven, "versionNeGiven field id is null");
ruleBool = env->GetBooleanField(jRejectRules, jf_versionNeGiven);
rules.versionNeGiven = ruleBool ? 1 : 0;
try {
ramcloud->write(jTableId,
key.pointer, key.length,
value.pointer, value.length,
&rules,
&version);
}
EXCEPTION_CATCHER(-1);
return static_cast<jlong> (version);
}
/*
* Class: edu_stanford_ramcloud_JRamCloud_TableEnumerator
* Method: init
* Signature: (J)V
*/
JNIEXPORT jlong JNICALL Java_edu_stanford_ramcloud_JRamCloud_00024TableEnumerator_init(JNIEnv *env,
jobject jTableEnumerator,
jlong jTableId)
{
const static jclass cls = (jclass)env->NewGlobalRef(env->FindClass(PACKAGE_PATH "JRamCloud$TableEnumerator"));
const static jfieldID fieldId = env->GetFieldID(cls, "ramCloudObjectPointer", "J");
RamCloud* ramcloud = reinterpret_cast<RamCloud*>(env->GetLongField(jTableEnumerator, fieldId));
return reinterpret_cast<jlong>(new TableEnumerator(*ramcloud, jTableId));
}
/*
* Class: edu_stanford_ramcloud_JRamCloud_TableEnumerator
* Method: hasNext
* Signature: ()Z
*/
JNIEXPORT jboolean JNICALL Java_edu_stanford_ramcloud_JRamCloud_00024TableEnumerator_hasNext( JNIEnv *env,
jobject jTableEnumerator)
{
TableEnumerator* tableEnum = getTableEnumerator(env, jTableEnumerator);
return static_cast<jboolean>(tableEnum->hasNext());
}
/*
* Class: edu_stanford_ramcloud_JRamCloud_TableEnumerator
* Method: next
* Signature: ()Ledu/stanford/ramcloud/JRamCloud/Object;
*/
JNIEXPORT jobject JNICALL Java_edu_stanford_ramcloud_JRamCloud_00024TableEnumerator_next( JNIEnv *env,
jobject jTableEnumerator)
{
TableEnumerator* tableEnum = getTableEnumerator(env, jTableEnumerator);
if(tableEnum->hasNext())
{
uint32_t size = 0;
const void* buffer = 0;
uint64_t version = 0;
tableEnum->next(&size, &buffer);
Object object(buffer, size);
jbyteArray jKey = env->NewByteArray(object.getKeyLength());
jbyteArray jValue = env->NewByteArray(object.getDataLength());
JByteArrayGetter key(env, jKey);
JByteArrayGetter value(env, jValue);
memcpy(key.pointer, object.getKey(), object.getKeyLength());
memcpy(value.pointer, object.getData(), object.getDataLength());
version = object.getVersion();
const static jclass cls = (jclass)env->NewGlobalRef(env->FindClass(PACKAGE_PATH "JRamCloud$Object"));
check_null(cls, "FindClass failed");
const static jmethodID methodId = env->GetMethodID(cls,
"<init>",
"(L" PACKAGE_PATH "JRamCloud;[B[BJ)V");
check_null(methodId, "GetMethodID failed");
return env->NewObject(cls,
methodId,
jTableEnumerator,
jKey,
jValue,
static_cast<jlong>(version));
} else
return NULL;
}
/*
* Class: edu_stanford_ramcloud_JRamCloud
* Method: multiWrite
* Signature: ([Ledu/stanford/ramcloud/JRamCloud/MultiWriteObject;)[Ledu/stanford/ramcloud/JRamCloud/MultiWriteRspObject;
*/
JNIEXPORT jobjectArray JNICALL Java_edu_stanford_ramcloud_JRamCloud_multiWrite(JNIEnv *env, jobject jRamCloud, jobjectArray jmultiWriteArray) {
jint requestNum = env->GetArrayLength(jmultiWriteArray);
RamCloud* ramcloud = getRamCloud(env, jRamCloud);
Tub<MultiWriteObject> objects[requestNum];
MultiWriteObject *requests[requestNum];
RejectRules rules[requestNum];
jbyteArray jKey[requestNum];
jbyteArray jValue[requestNum];
const static jclass jc_multiWriteObject = (jclass)env->NewGlobalRef(env->FindClass(PACKAGE_PATH "JRamCloud$MultiWriteObject"));
const static jclass jc_RejectRules = (jclass)env->NewGlobalRef(env->FindClass(PACKAGE_PATH "JRamCloud$RejectRules"));
const static jfieldID jf_tableId = env->GetFieldID(jc_multiWriteObject, "tableId", "J");
const static jfieldID jf_key = env->GetFieldID(jc_multiWriteObject, "key", "[B");
const static jfieldID jf_value = env->GetFieldID(jc_multiWriteObject, "value", "[B");
const static jfieldID jf_reject_rules = env->GetFieldID(jc_multiWriteObject, "rules", "L" PACKAGE_PATH "JRamCloud$RejectRules;");
const static jfieldID jf_doesntExist = env->GetFieldID(jc_RejectRules, "doesntExist", "Z");
check_null(jf_doesntExist, "doesentExist field id is null");
const static jfieldID jf_exists = env->GetFieldID(jc_RejectRules, "exists", "Z");
check_null(jf_exists, "exists field id is null");
const static jfieldID jf_givenVersion = env->GetFieldID(jc_RejectRules, "givenVersion", "J");
check_null(jf_givenVersion, "givenVersion field id is null");
const static jfieldID jf_versionLeGiven = env->GetFieldID(jc_RejectRules, "versionLeGiven", "Z");
check_null(jf_versionLeGiven, "versionLeGiven field id is null");
const static jfieldID jf_versionNeGiven = env->GetFieldID(jc_RejectRules, "versionNeGiven", "Z");
check_null(jf_versionNeGiven, "versionNeGiven field id is null");
for (int i = 0; i < requestNum; i++) {
jobject obj = env->GetObjectArrayElement(jmultiWriteArray, i);
check_null(obj, "multi write GetObjectArrayElement failed");
uint64_t tableId = env->GetLongField(obj, jf_tableId);
jKey[i] = (jbyteArray)env->GetObjectField(obj, jf_key);
jbyte* keyData = env->GetByteArrayElements(jKey[i], NULL);
uint16_t keyLength = env->GetArrayLength(jKey[i]);
jValue[i] = (jbyteArray)env->GetObjectField(obj, jf_value);
jbyte* valueData = env->GetByteArrayElements(jValue[i], NULL);
uint32_t valueLength = env->GetArrayLength(jValue[i]);
jobject jRejectRules = env->GetObjectField(obj, jf_reject_rules);
rules[i] = {};
if (jRejectRules != NULL) {
jboolean ruleBool;
ruleBool = env->GetBooleanField(jRejectRules, jf_doesntExist);
rules[i].doesntExist = ruleBool ? 1 : 0;
ruleBool = env->GetBooleanField(jRejectRules, jf_exists);
rules[i].exists = ruleBool ? 1 : 0;
rules[i].givenVersion = env->GetLongField(jRejectRules, jf_givenVersion);
ruleBool = env->GetBooleanField(jRejectRules, jf_versionLeGiven);
rules[i].versionLeGiven = ruleBool ? 1 : 0;
ruleBool = env->GetBooleanField(jRejectRules, jf_versionNeGiven);
rules[i].versionNeGiven = ruleBool ? 1 : 0;
}
objects[i].construct(tableId, keyData, keyLength, valueData, valueLength, &rules[i]);
requests[i] = objects[i].get();
}
try {
ramcloud->multiWrite(requests, requestNum);
} EXCEPTION_CATCHER(NULL);
const static jclass jc_RcObject = (jclass)env->NewGlobalRef(env->FindClass(PACKAGE_PATH "JRamCloud$MultiWriteRspObject"));
check_null(jc_RcObject, "FindClass failed");
const static jmethodID jm_init = env->GetMethodID(jc_RcObject,
"<init>",
"(L" PACKAGE_PATH "JRamCloud;IJ)V");
jobjectArray outJNIArray = env->NewObjectArray(requestNum, jc_RcObject , NULL);
check_null(outJNIArray, "NewObjectArray failed");
for (int i = 0 ; i < requestNum ; i++) {
jobject obj = env->NewObject(jc_RcObject, jm_init, jRamCloud, objects[i]->status, objects[i]->version);
check_null(obj, "NewObject failed");
env->SetObjectArrayElement(outJNIArray, i, obj);
env->ReleaseByteArrayElements(jKey[i], (jbyte *)requests[i]->key, JNI_ABORT);
env->ReleaseByteArrayElements(jValue[i], (jbyte *)requests[i]->value, JNI_ABORT);
objects[i].destroy();
}
return outJNIArray;
}