[GitHub] xubo245 commented on a change in pull request #2991: [CARBONDATA-3043] Add build script and add test case with GoogleTest Framework for CSDK

[GitBox]

xubo245 commented on a change in pull request #2991: [CARBONDATA-3043] Add build script and add test case with GoogleTest Framework for CSDK
URL: https://github.com/apache/carbondata/pull/2991#discussion_r247378044
 
 

 ##########
 File path: store/CSDK/test/main_ft.cpp
 ##########
 @@ -0,0 +1,1172 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.
+ */
+
+#include <iostream>
+#include <jni.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/time.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include "../src/CarbonReader.h"
+#include "../src/CarbonRow.h"
+#include "../src/CarbonWriter.h"
+#include "../src/CarbonSchemaReader.h"
+#include "../src/Schema.h"
+#include "../src/CarbonProperties.h"
+#include "gtest/gtest.h"
+
+using namespace std;
+
+JavaVM *jvm;
+JNIEnv *env;
+int my_argc;
+char** my_argv;
+
+/**
+ * init jvm
+ *
+ * @return
+ */
+JNIEnv *initJVM() {
+    JNIEnv *env;
+    JavaVMInitArgs vm_args;
+    int parNum = 2;
+    int res;
+    JavaVMOption options[parNum];
+
+    options[0].optionString = "-Djava.class.path=../../sdk/target/carbondata-sdk.jar";
+    options[1].optionString = "-verbose:jni";                // For debug and check the jni information
+    //    options[2].optionString = "-Xmx12000m";            // change the jvm max memory size
+    //    options[3].optionString = "-Xms5000m";             // change the jvm min memory size
+    //    options[4].optionString = "-Djava.compiler=NONE";  // forbidden JIT
+    vm_args.version = JNI_VERSION_1_8;
+    vm_args.nOptions = parNum;
+    vm_args.options = options;
+    vm_args.ignoreUnrecognized = JNI_FALSE;
+
+    res = JNI_CreateJavaVM(&jvm, (void **) &env, &vm_args);
+    if (res < 0) {
+        fprintf(stderr, "\nCan't create Java VM\n");
+        exit(1);
+    }
+
+    return env;
+}
+
+
+/**
+ * convert Exception to String(Exception toString())
+ * @param jthrowable exc
+ * @return exception as String
+ */
+ char* convertExceptionToString(jthrowable exc){
+        jboolean isCopy = false;
+        jmethodID toString = env->GetMethodID(env->FindClass("java/lang/Object"), "toString", "()Ljava/lang/String;");
+        jstring s = (jstring) env->CallObjectMethod(exc, toString);
+        char *exception_string = (char *) env->GetStringUTFChars(s, JNI_FALSE);
+        return exception_string;
+
+    }
+
+/**
+ * print array result
+ *
+ * @param env JNIEnv
+ * @param arr array
+ */
+void printArray(JNIEnv *env, jobjectArray arr) {
+    if (env->ExceptionCheck()) {
+        throw env->ExceptionOccurred();
+    }
+    jsize length = env->GetArrayLength(arr);
+    int j = 0;
+    for (j = 0; j < length; j++) {
+        jobject element = env->GetObjectArrayElement(arr, j);
+        if (env->ExceptionCheck()) {
+            throw env->ExceptionOccurred();
+        }
+        char *str = (char *) env->GetStringUTFChars((jstring) element, JNI_FALSE);
+        printf("%s\t", str);
+    }
+    env->DeleteLocalRef(arr);
+}
+
+/**
+ * print boolean result
+ *
+ * @param env JNIEnv
+ * @param bool1 boolean value
+ */
+void printBoolean(jboolean bool1) {
+    if (bool1) {
+        printf("true\t");
+    } else {
+        printf("false\t");
+    }
+}
+
+/**
+ * print result of reading data
+ *
+ * @param env JNIEnv
+ * @param reader CarbonReader object
+ */
+void printResultWithException(JNIEnv *env, CarbonReader reader) {
+    CarbonRow carbonRow(env);
+    try {
+        while (reader.hasNext()) {
+            jobject row = reader.readNextRow();
+            carbonRow.setCarbonRow(row);
+            printf("%s\t", carbonRow.getString(1));
+            printf("%d\t", carbonRow.getInt(1));
+            printf("%ld\t", carbonRow.getLong(2));
+            printf("%s\t", carbonRow.getVarchar(1));
+            printArray(env, carbonRow.getArray(0));
+            printf("%d\t", carbonRow.getShort(5));
+            printf("%d\t", carbonRow.getInt(6));
+            printf("%ld\t", carbonRow.getLong(7));
+            printf("%lf\t", carbonRow.getDouble(8));
+            printBoolean(carbonRow.getBoolean(9));
+            printf("%s\t", carbonRow.getDecimal(9));
+            printf("%f\t", carbonRow.getFloat(11));
+            printf("\n");
+            env->DeleteLocalRef(row);
+        }
+        reader.close();
+        carbonRow.close();
+    } catch (jthrowable e) {
+        env->ExceptionDescribe();
+        printf("%s",convertExceptionToString(e));
+        reader.close();
+        carbonRow.close();
+        throw e;
+    }
+}
+
+/**
+ * print result of reading data
+ *
+ * @param env JNIEnv
+ * @param reader CarbonReader object
+ */
+void printResult(JNIEnv *env, CarbonReader reader) {
+    try {
+        CarbonRow carbonRow(env);
+        while (reader.hasNext()) {
+            jobject row = reader.readNextRow();
+            carbonRow.setCarbonRow(row);
+            printf("%s\t", carbonRow.getString(0));
+            printf("%d\t", carbonRow.getInt(1));
+            printf("%ld\t", carbonRow.getLong(2));
+            //printf("%s\t", carbonRow.getVarchar(3));
+            printArray(env, carbonRow.getArray(3));
+            printf("%d\t", carbonRow.getShort(4));
+            printf("%d\t", carbonRow.getInt(5));
+            printf("%ld\t", carbonRow.getLong(6));
+            printf("%lf\t", carbonRow.getDouble(7));
+            printBoolean(carbonRow.getBoolean(8));
+            //printf("%s\t", carbonRow.getDecimal(10));
+            printf("%f\t", carbonRow.getFloat(9));
+            printf("\n");
+            env->DeleteLocalRef(row);
+        }
+        carbonRow.close();
+        reader.close();
+    } catch (jthrowable e) {
+        env->ExceptionDescribe();
+        printf("%s",convertExceptionToString(e));
+    }
+}
+
+
+
+/**
+ * test read Schema from path
+ *
+ * @param env jni env
+ * @return whether it is success
+ */
+bool readSchema(JNIEnv *env, char *Path, bool validateSchema, char **argv, int argc) {
+    try {
+        printf("\nread Schema:\n");
+        Configuration conf(env);
+        if (argc > 3) {
+            conf.set("fs.s3a.access.key", argv[1]);
+            conf.set("fs.s3a.secret.key", argv[2]);
+            conf.set("fs.s3a.endpoint", argv[3]);
+        }
+        printf("%s\n", conf.get("fs.s3a.endpoint", "default"));
+
+        CarbonSchemaReader carbonSchemaReader(env);
+        jobject schema;
+
+        if (validateSchema) {
+            schema = carbonSchemaReader.readSchema(Path, validateSchema, conf);
+        } else {
+            schema = carbonSchemaReader.readSchema(Path, conf);
+        }
+        Schema carbonSchema(env, schema);
+        int length = carbonSchema.getFieldsLength();
+        printf("schema length is:%d\n", length);
+        for (int i = 0; i < length; i++) {
+            printf("%d\t", i);
+            printf("%s\t", carbonSchema.getFieldName(i));
+            printf("%s\n", carbonSchema.getFieldDataTypeName(i));
+            if (strcmp(carbonSchema.getFieldDataTypeName(i), "ARRAY") == 0) {
+                printf("Array Element Type Name is:%s\n", carbonSchema.getArrayElementTypeName(i));
+            }
+        }
+    } catch (jthrowable e) {
+        env->ExceptionDescribe();
+        printf("%s",convertExceptionToString(e));
+        return false;
+    }
+    return true;
+}
+
+
+
+/**
+ * test the exception when carbonRow with wrong index.
+ *
+ * @param env  jni env
+ * @return
+ */
+bool tryCarbonRowException(JNIEnv *env, char *path) {
+    printf("\nRead data from local without projection:\n");
+    bool gotException= false;
+    CarbonReader carbonReaderClass;
+    try {
+        carbonReaderClass.builder(env, path);
+    } catch (runtime_error e) {
+        printf("\nget exception from builder and throw\n");
+        throw e;
+    }
+    try {
+        carbonReaderClass.build();
+        printResultWithException(env, carbonReaderClass);
+    } catch (jthrowable e) {
+        env->ExceptionDescribe();
+        printf("%s",convertExceptionToString(e));
+        gotException= true;
+        carbonReaderClass.close();
+    }
+    return gotException;
+}
+
+/**
+ * test read data from local disk, without projection
+ *
+ * @param env  jni env
+ * @return
+ */
+bool readFromLocalWithoutProjection(JNIEnv *env, char *path) {
+    printf("\nRead data from local without projection:\n");
+    CarbonReader carbonReaderClass;
+    try {
+        carbonReaderClass.builder(env, path);
+    } catch (runtime_error e) {
+        printf("\nget exception fro builder and throw\n");
+        throw e;
+    }
+    try {
+        carbonReaderClass.build();
+        printResult(env, carbonReaderClass);
+    } catch (jthrowable e) {
+        env->ExceptionDescribe();
+        printf("%s",convertExceptionToString(e));
+        return false;
+    }
+    return true;
+}
+
+/**
+ * test read data by readNextRow method
+ *
+ * @param env  jni env
+ */
+bool testReadNextRow(JNIEnv *env, char *path, int printNum, char **argv, int argc, bool useVectorReader) {
+    printf("\nTest next Row Performance, useVectorReader is ");
+    printBoolean(useVectorReader);
+    printf("\n");
+
+    try {
+        struct timeval start, build, startRead, endBatchRead, endRead;
+        gettimeofday(&start, NULL);
+        CarbonReader carbonReaderClass;
+
+        carbonReaderClass.builder(env, path);
+        if (argc > 1) {
+            carbonReaderClass.withHadoopConf("fs.s3a.access.key", argv[1]);
+            carbonReaderClass.withHadoopConf("fs.s3a.secret.key", argv[2]);
+            carbonReaderClass.withHadoopConf("fs.s3a.endpoint", argv[3]);
+        }
+        if (!useVectorReader) {
+            carbonReaderClass.withRowRecordReader();
+        }
+        carbonReaderClass.build();
+
+        gettimeofday(&build, NULL);
+        int time = 1000000 * (build.tv_sec - start.tv_sec) + build.tv_usec - start.tv_usec;
+        double buildTime = time / 1000000.0;
+        printf("\n\nbuild time is: %lf s\n\n", time / 1000000.0);
+
+        CarbonRow carbonRow(env);
+        int i = 0;
+
+        gettimeofday(&startRead, NULL);
+        jobject row;
+        while (carbonReaderClass.hasNext()) {
+
+            row = carbonReaderClass.readNextRow();
+
+            i++;
+            if (i > 1 && i % printNum == 0) {
+                gettimeofday(&endBatchRead, NULL);
+
+                time = 1000000 * (endBatchRead.tv_sec - startRead.tv_sec) + endBatchRead.tv_usec - startRead.tv_usec;
+                printf("%d: time is %lf s, speed is %lf records/s  ", i, time / 1000000.0,
+                       printNum / (time / 1000000.0));
+
+                carbonRow.setCarbonRow(row);
+                printf("%s\t", carbonRow.getString(0));
+                printf("%s\t", carbonRow.getString(1));
+                printf("%s\t", carbonRow.getString(2));
+                printf("%s\t", carbonRow.getString(3));
+                printf("%ld\t", carbonRow.getLong(4));
+                printf("%ld\t", carbonRow.getLong(5));
+                printf("\n");
+
+                gettimeofday(&startRead, NULL);
+            }
+            env->DeleteLocalRef(row);
+        }
+
+        gettimeofday(&endRead, NULL);
+
+        time = 1000000 * (endRead.tv_sec - build.tv_sec) + endRead.tv_usec - build.tv_usec;
+        printf("total line is: %d,\t build time is: %lf s,\tread time is %lf s, average speed is %lf records/s  ",
+               i, buildTime, time / 1000000.0, i / (time / 1000000.0));
+        carbonReaderClass.close();
+        carbonRow.close();
+    } catch (jthrowable e) {
+        env->ExceptionDescribe();
+        printf("%s",convertExceptionToString(e));
+        env->ExceptionClear();
+        return false;
+    }
+    return true;
+}
+
+/**
+ * test read data by readNextBatchRow method
+ *
+ * @param env  jni env
+ */
+bool testReadNextBatchRow(JNIEnv *env, char *path, int batchSize, int printNum, char **argv, int argc,
+                          bool useVectorReader) {
+    bool result= true;
+    try {
+        printf("\n\nTest next Batch Row Performance:\n");
+        printBoolean(useVectorReader);
+        printf("\n");
+
+        struct timeval start, build, read;
+        gettimeofday(&start, NULL);
+
+        CarbonReader carbonReaderClass;
+
+        carbonReaderClass.builder(env, path);
+        if (argc > 1) {
+            carbonReaderClass.withHadoopConf("fs.s3a.access.key", argv[1]);
+            carbonReaderClass.withHadoopConf("fs.s3a.secret.key", argv[2]);
+            carbonReaderClass.withHadoopConf("fs.s3a.endpoint", argv[3]);
+        }
+        if (!useVectorReader) {
+            carbonReaderClass.withRowRecordReader();
+        }
+        carbonReaderClass.withBatch(batchSize);
+        carbonReaderClass.build();
+
+        gettimeofday(&build, NULL);
+        int time = 1000000 * (build.tv_sec - start.tv_sec) + build.tv_usec - start.tv_usec;
+        double buildTime = time / 1000000.0;
+        printf("\n\nbuild time is: %lf s\n\n", time / 1000000.0);
+
+        CarbonRow carbonRow(env);
+        int i = 0;
+        struct timeval startHasNext, startReadNextBatchRow, endReadNextBatchRow, endRead;
+        gettimeofday(&startHasNext, NULL);
+
+        while (carbonReaderClass.hasNext()) {
+
+            gettimeofday(&startReadNextBatchRow, NULL);
+            jobjectArray batch = carbonReaderClass.readNextBatchRow();
+            if (env->ExceptionCheck()) {
+                env->ExceptionDescribe();
+            }
+            gettimeofday(&endReadNextBatchRow, NULL);
+
+            jsize length = env->GetArrayLength(batch);
+            if (i + length > printNum - 1) {
+                for (int j = 0; j < length; j++) {
+                    i++;
+                    jobject row = env->GetObjectArrayElement(batch, j);
+                    carbonRow.setCarbonRow(row);
+                    carbonRow.getString(0);
+                    carbonRow.getString(1);
+                    carbonRow.getString(2);
+                    carbonRow.getString(3);
+                    carbonRow.getLong(4);
+                    carbonRow.getLong(5);
+                    if (i > 1 && i % printNum == 0) {
+                        gettimeofday(&read, NULL);
+
+                        double hasNextTime = 1000000 * (startReadNextBatchRow.tv_sec - startHasNext.tv_sec) +
+                                             startReadNextBatchRow.tv_usec - startHasNext.tv_usec;
+
+                        double readNextBatchTime = 1000000 * (endReadNextBatchRow.tv_sec - startReadNextBatchRow.tv_sec) +
+                                                   endReadNextBatchRow.tv_usec - startReadNextBatchRow.tv_usec;
+
+                        time = 1000000 * (read.tv_sec - startHasNext.tv_sec) + read.tv_usec - startHasNext.tv_usec;
+                        printf("%d: time is %lf s, speed is %lf records/s, hasNext time is %lf s,readNextBatchRow time is %lf s ",
+                               i, time / 1000000.0, printNum / (time / 1000000.0), hasNextTime / 1000000.0,
+                               readNextBatchTime / 1000000.0);
+                        gettimeofday(&startHasNext, NULL);
+                        printf("%s\t", carbonRow.getString(0));
+                        printf("%s\t", carbonRow.getString(1));
+                        printf("%s\t", carbonRow.getString(2));
+                        printf("%s\t", carbonRow.getString(3));
+                        printf("%ld\t", carbonRow.getLong(4));
+                        printf("%ld\t", carbonRow.getLong(5));
+                        printf("\n");
+                    }
+                    env->DeleteLocalRef(row);
+                }
+            } else {
+                i = i + length;
+            }
+            env->DeleteLocalRef(batch);
+        }
+        gettimeofday(&endRead, NULL);
+        time = 1000000 * (endRead.tv_sec - build.tv_sec) + endRead.tv_usec - build.tv_usec;
+        printf("total line is: %d,\t build time is: %lf s,\tread time is %lf s, average speed is %lf records/s  ",
+               i, buildTime, time / 1000000.0, i / (time / 1000000.0));
+        carbonReaderClass.close();
+        carbonRow.close();
+    } catch (jthrowable e) {
+        env->ExceptionDescribe();
+        printf("%s",convertExceptionToString(e));
+        env->ExceptionClear();
+        result= false;
+    }
+    return result;
+}
+
+/**
+ * test read data from local disk
+ *
+ * @param env  jni env
+ * @return
+ */
+bool readFromLocalWithProjection(JNIEnv *env, char *path) {
+    printf("\nRead data from local:\n");
+    try {
+        CarbonReader reader;
+        reader.builder(env, path, "test");
+
+        char *argv[10];
+        argv[0] = "stringField";
+        argv[1] = "shortField";
+        argv[2] = "intField";
+        argv[3] = "longField";
+        argv[4] = "doubleField";
+        argv[5] = "boolField";
+        argv[6] = "dateField";
+        argv[7] = "timeField";
+        //argv[8] = "decimalField";
+        //argv[9] = "varcharField";
+        argv[8] = "arrayField";
+        argv[9] = "floatField";
+        reader.projection(10, argv);
+
+        reader.build();
+
+        CarbonRow carbonRow(env);
+        while (reader.hasNext()) {
+            jobject row = reader.readNextRow();
+            carbonRow.setCarbonRow(row);
+
+            printf("%s\t", carbonRow.getString(0));
+            printf("%d\t", carbonRow.getShort(1));
+            printf("%d\t", carbonRow.getInt(2));
+            printf("%ld\t", carbonRow.getLong(3));
+            printf("%lf\t", carbonRow.getDouble(4));
+            printBoolean(carbonRow.getBoolean(5));
+            printf("%d\t", carbonRow.getInt(6));
+            printf("%ld\t", carbonRow.getLong(7));
+            //printf("%s\t", carbonRow.getDecimal(8));
+           //printf("%s\t", carbonRow.getVarchar(9));
+            printArray(env, carbonRow.getArray(8));
+            printf("%f\t", carbonRow.getFloat(9));
+            printf("\n");
+            env->DeleteLocalRef(row);
+        }
+
+        reader.close();
+        carbonRow.close();
+    } catch (jthrowable e) {
+        env->ExceptionDescribe();
+        printf("%s",convertExceptionToString(e));
+        env->ExceptionClear();
+        printf("\n Reade Data from local is failed :\n");
+        return false;
+    }
+    return true;
+}
+
+
+bool tryCatchException(JNIEnv *env) {
+    printf("\ntry catch exception and print:\n");
+    bool gotException= false;
+    CarbonReader carbonReaderClass;
+    carbonReaderClass.builder(env, "./carbondata");
+    try {
+        carbonReaderClass.build();
+    } catch (jthrowable e) {
+        env->ExceptionDescribe();
+        printf("%s",convertExceptionToString(e));
+        env->ExceptionClear();
+        gotException= true;
+    }
+    printf("\nfinished handle exception\n");
+    return gotException;
+}
+
+bool testCarbonProperties(JNIEnv *env) {
+    try {
+        printf("%s", "test Carbon Properties:");
+        CarbonProperties carbonProperties(env);
+        char *key = "carbon.unsafe.working.memory.in.mb";
+        printf("%s\t", carbonProperties.getProperty(key));
+        printf("%s\t", carbonProperties.getProperty(key, "512"));
+        carbonProperties.addProperty(key, "1024");
+        char *current = carbonProperties.getProperty(key);
+        printf("%s\t", current);
+        if (strcmp(current, "1024") == 0) {
+            return true;
+        } else {
+            return false;
+        }
+    } catch (jthrowable e) {
+        env->ExceptionDescribe();
+        printf("%s",convertExceptionToString(e));
+        env->ExceptionClear();
+        return false;
+    }
+}
+
+/**
+ * test write data
+ * test WithLoadOption interface
+ *
+ * @param env  jni env
+ * @param path file path
+ * @param argc argument counter
+ * @param argv argument vector
+ * @return true or throw exception
+ */
+bool testWriteData(JNIEnv *env, char *path, int argc, char *argv[],int rowNum) {
+
+    char *jsonSchema = "[{stringField:string},{shortField:short},{intField:int},{longField:long},{doubleField:double},{boolField:boolean},{dateField:date},{timeField:timestamp},{floatField:float},{arrayField:array}]";
+    CarbonWriter writer;
+    try {
+        writer.builder(env);
+        writer.outputPath(path);
+        writer.withCsvInput(jsonSchema);
+        writer.withLoadOption("complex_delimiter_level_1", "#");
+        writer.writtenBy("CSDK");
+        writer.taskNo(185);
+        writer.withThreadSafe(1);
+        writer.uniqueIdentifier(1549911814000000);
+        writer.withBlockSize(1);
+        writer.withBlockletSize(16);
+        writer.enableLocalDictionary(true);
+        writer.localDictionaryThreshold(10000);
+        if (argc > 3) {
+            writer.withHadoopConf("fs.s3a.access.key", argv[1]);
+            writer.withHadoopConf("fs.s3a.secret.key", argv[2]);
+            writer.withHadoopConf("fs.s3a.endpoint", argv[3]);
+        }
+        writer.build();
+
+        int size = 10;
+        long longValue = 0;
+        double doubleValue = 0;
+        float floatValue = 0;
+        jclass objClass = env->FindClass("java/lang/String");
+        for (int i = 0; i < rowNum; ++i) {
+            jobjectArray arr = env->NewObjectArray(size, objClass, 0);
+            char ctrInt[10];
+            gcvt(i, 10, ctrInt);
+
+            char a[15] = "robot";
+            strcat(a, ctrInt);
+            jobject stringField = env->NewStringUTF(a);
+            env->SetObjectArrayElement(arr, 0, stringField);
+
+            char ctrShort[10];
+            gcvt(i % 10000, 10, ctrShort);
+            jobject shortField = env->NewStringUTF(ctrShort);
+            env->SetObjectArrayElement(arr, 1, shortField);
+
+            jobject intField = env->NewStringUTF(ctrInt);
+            env->SetObjectArrayElement(arr, 2, intField);
+
+
+            char ctrLong[10];
+            gcvt(longValue, 10, ctrLong);
+            longValue = longValue + 2;
+            jobject longField = env->NewStringUTF(ctrLong);
+            env->SetObjectArrayElement(arr, 3, longField);
+
+            char ctrDouble[10];
+            gcvt(doubleValue, 10, ctrDouble);
+            doubleValue = doubleValue + 2;
+            jobject doubleField = env->NewStringUTF(ctrDouble);
+            env->SetObjectArrayElement(arr, 4, doubleField);
+
+            jobject boolField = env->NewStringUTF("true");
+            env->SetObjectArrayElement(arr, 5, boolField);
+
+            jobject dateField = env->NewStringUTF(" 2019-03-02");
+            env->SetObjectArrayElement(arr, 6, dateField);
+
+            jobject timeField = env->NewStringUTF("2019-02-12 03:03:34");
+            env->SetObjectArrayElement(arr, 7, timeField);
+
+            char ctrFloat[10];
+            gcvt(floatValue, 10, ctrFloat);
+            floatValue = floatValue + 2;
+            jobject floatField = env->NewStringUTF(ctrFloat);
+            env->SetObjectArrayElement(arr, 8, floatField);
+
+            jobject arrayField = env->NewStringUTF("Hello#World#From#Carbon");
+            env->SetObjectArrayElement(arr, 9, arrayField);
+
+
+            writer.write(arr);
+
+            env->DeleteLocalRef(stringField);
+            env->DeleteLocalRef(shortField);
+            env->DeleteLocalRef(intField);
+            env->DeleteLocalRef(longField);
+            env->DeleteLocalRef(doubleField);
+            env->DeleteLocalRef(floatField);
+            env->DeleteLocalRef(dateField);
+            env->DeleteLocalRef(timeField);
+            env->DeleteLocalRef(boolField);
+            env->DeleteLocalRef(arrayField);
+            env->DeleteLocalRef(arr);
+        }
+        writer.close();
+        } catch (jthrowable ex) {
+                env->ExceptionDescribe();
+                printf("%s",convertExceptionToString(ex));
+                env->ExceptionClear();
+                writer.close();
+                // If load fail no need to go for read.
+                return false;
+            }
 
 Review comment:
   Can you check the code style for this file?

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