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/*
* 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
*
* https://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 <stdio.h>
#include <sys/stat.h>
#include "avro.h"
#define NUM_RECORDS 100
static const char *filename = "avro_file.dat";
static const char PERSON_SCHEMA[] =
"{"
" \"type\":\"record\","
" \"name\":\"Person\","
" \"fields\": ["
" ]"
"}";
static int read_data() {
int rval;
int records_read = 0;
avro_file_reader_t reader;
avro_value_iface_t *iface;
avro_value_t value;
fprintf(stderr, "\nReading...\n");
rval = avro_file_reader(filename, &reader);
if (rval) {
fprintf(stderr, "Error: %s\n", avro_strerror());
return EXIT_FAILURE;
}
avro_schema_t schema = avro_file_reader_get_writer_schema(reader);
iface = avro_generic_class_from_schema(schema);
avro_generic_value_new(iface, &value);
while ((rval = avro_file_reader_read_value(reader, &value)) == 0) {
records_read++;
avro_value_reset(&value);
}
avro_value_decref(&value);
avro_value_iface_decref(iface);
avro_schema_decref(schema);
avro_file_reader_close(reader);
fprintf(stderr, "read %d records.\n", records_read);
if (rval != EOF || records_read != NUM_RECORDS) {
fprintf(stderr, "Error: %s\n", avro_strerror());
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
static int write_data() {
int i;
avro_schema_t schema;
avro_schema_error_t error;
avro_file_writer_t writer;
avro_value_iface_t *iface;
avro_value_t value;
fprintf(stderr, "\nWriting...\n");
if (avro_schema_from_json(PERSON_SCHEMA, 0, &schema, &error)) {
fprintf(stderr, "Unable to parse schema\n");
return EXIT_FAILURE;
}
iface = avro_generic_class_from_schema(schema);
avro_generic_value_new(iface, &value);
if (avro_file_writer_create(filename, schema, &writer)) {
fprintf(stderr, "There was an error creating file: %s\n", avro_strerror());
return EXIT_FAILURE;
}
for (i = 0; i < NUM_RECORDS; i++) {
if (avro_file_writer_append_value(writer, &value)) {
fprintf(stderr, "There was an error creating file: %s\n", avro_strerror());
return EXIT_FAILURE;
}
}
if (avro_file_writer_close(writer)) {
fprintf(stderr, "There was an error creating file: %s\n", avro_strerror());
return EXIT_FAILURE;
}
avro_value_iface_decref(iface);
avro_value_decref(&value);
avro_schema_decref(schema);
return EXIT_SUCCESS;
}
int main()
{
int read_data_result;
if (write_data()) {
return EXIT_FAILURE;
}
read_data_result = read_data();
remove(filename);
return read_data_result;
}
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