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vbuckettool.c
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vbuckettool.c
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/* -*- Mode: C++; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
* Copyright 2010 NorthScale, Inc.
*
* 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.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libvbucket/vbucket.h>
int main(int argc, char **argv) {
if (argc < 3) {
printf("vbuckettool mapfile key0 [key1 ... [keyN]]\n\n");
printf(" The vbuckettool expects a vBucketServerMap JSON mapfile, and\n");
printf(" will print the vBucketId and servers each key should live on.\n");
printf(" You may use '-' instead for the filename to specify stdin.\n\n");
printf(" Examples:\n");
printf(" ./vbuckettool file.json some_key another_key\n\n");
printf(" curl http://HOST:8091/pools/default/buckets/default | \\\n");
printf(" ./vbuckettool - some_key another_key\n");
exit(1);
}
VBUCKET_CONFIG_HANDLE vb = NULL;
if (strcmp("-", argv[1]) == 0) {
char buf[50000];
if (fgets(buf, sizeof(buf) - 1, stdin) == NULL) {
fprintf(stderr, "ERROR: vbuckettool found no input on stdin\n");
exit(1);
}
buf[sizeof(buf) - 1] = '\0';
vb = vbucket_config_parse_string(buf);
} else {
vb = vbucket_config_parse_file(argv[1]);
}
if (vb == NULL) {
fprintf(stderr, "ERROR: vbucket_config_parse_string error: %s\n", vbucket_get_error());
exit(1);
}
int num_replicas = vbucket_config_get_num_replicas(vb);
for (int i = 2; i < argc; i++) {
char *key = argv[i];
int v = vbucket_get_vbucket_by_key(vb, key, strlen(key));
int m = vbucket_get_master(vb, v);
const char *master = vbucket_config_get_server(vb, m);
printf("key: %s vBucketId: %d master: %s", key, v, master);
if (num_replicas > 0) {
printf(" replicas:");
for (int j = 0; j < num_replicas; j++) {
int r = vbucket_get_replica(vb, v, j);
if (r == -1) {
break;
}
const char *replica = vbucket_config_get_server(vb, r);
if (replica != NULL) {
printf(" %s", replica);
}
}
}
printf("\n");
}
vbucket_config_destroy(vb);
return 0;
}