simulate a raft KVStore, for self testing
This commit is contained in:
Minghao Li
parent
5a8d3a589f
commit
829fd712f7
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@ -5,11 +5,28 @@
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extern "C" {
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#endif
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#define COMMAND_LEN 256
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#define DIR_LEN 128
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#define HOST_LEN 128
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#include <stdint.h>
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#define MAX_PEERS 10
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#define COMMAND_LEN 512
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#define TOKEN_LEN 128
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#define DIR_LEN 256
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#define HOST_LEN 64
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#define ADDRESS_LEN (HOST_LEN + 16)
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typedef struct {
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char host[HOST_LEN];
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uint32_t port;
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} Addr;
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typedef struct {
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Addr me;
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Addr peers[MAX_PEERS];
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int peersCount;
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char dir[DIR_LEN];
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char dataDir[DIR_LEN + HOST_LEN * 2];
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} SRaftServerConfig;
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#ifdef __cplusplus
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}
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#endif
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@ -3,6 +3,7 @@
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#include <pthread.h>
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#include <string.h>
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#include <assert.h>
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#include <getopt.h>
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#include <time.h>
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#include <stdlib.h>
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#include <getopt.h>
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@ -13,6 +14,67 @@
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const char *exe_name;
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void parseAddr(const char *addr, char *host, int len, uint32_t *port) {
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char* tmp = (char*)malloc(strlen(addr) + 1);
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strcpy(tmp, addr);
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char* context;
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char* separator = ":";
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char* token = strtok_r(tmp, separator, &context);
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if (token) {
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snprintf(host, len, "%s", token);
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}
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token = strtok_r(NULL, separator, &context);
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if (token) {
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sscanf(token, "%u", port);
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}
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free(tmp);
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}
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// only parse 3 tokens
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int parseCommand(const char* str, char* token1, char* token2, char* token3, int len)
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{
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char* tmp = (char*)malloc(strlen(str) + 1);
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strcpy(tmp, str);
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char* context;
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char* separator = " ";
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int n = 0;
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char* token = strtok_r(tmp, separator, &context);
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if (!token) {
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goto ret;
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}
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if (strcmp(token, "") != 0) {
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strncpy(token1, token, len);
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n++;
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}
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token = strtok_r(NULL, separator, &context);
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if (!token) {
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goto ret;
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}
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if (strcmp(token, "") != 0) {
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strncpy(token2, token, len);
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n++;
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}
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token = strtok_r(NULL, separator, &context);
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if (!token) {
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goto ret;
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}
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if (strcmp(token, "") != 0) {
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strncpy(token3, token, len);
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n++;
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}
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ret:
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return n;
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free(tmp);
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}
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void *startServerFunc(void *param) {
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SRaftServer *pServer = (SRaftServer*)param;
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int32_t r = raftServerStart(pServer);
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@ -22,6 +84,86 @@ void *startServerFunc(void *param) {
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}
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// Console ---------------------------------
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const char* state2String(unsigned short state) {
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if (state == RAFT_UNAVAILABLE) {
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return "RAFT_UNAVAILABLE";
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} else if (state == RAFT_FOLLOWER) {
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return "RAFT_FOLLOWER";
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} else if (state == RAFT_CANDIDATE) {
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return "RAFT_CANDIDATE";
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} else if (state == RAFT_LEADER) {
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return "RAFT_LEADER";
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}
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return "UNKNOWN_RAFT_STATE";
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}
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void printRaftConfiguration(struct raft_configuration *c) {
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printf("configuration: \n");
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for (int i = 0; i < c->n; ++i) {
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printf("%llu -- %d -- %s\n", c->servers->id, c->servers->role, c->servers->address);
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}
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}
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void printRaftState(struct raft *r) {
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printf("----Raft State: -----------\n");
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printf("my_id: %llu \n", r->id);
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printf("address: %s \n", r->address);
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printf("current_term: %llu \n", r->current_term);
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printf("voted_for: %llu \n", r->voted_for);
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printf("role: %s \n", state2String(r->state));
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printf("commit_index: %llu \n", r->commit_index);
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printf("last_applied: %llu \n", r->last_applied);
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printf("last_stored: %llu \n", r->last_stored);
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/*
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printf("configuration_index: %llu \n", r->configuration_index);
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printf("configuration_uncommitted_index: %llu \n", r->configuration_uncommitted_index);
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printRaftConfiguration(&r->configuration);
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*/
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printf("----------------------------\n");
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}
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void putValueCb(struct raft_apply *req, int status, void *result) {
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raft_free(req);
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struct raft *r = req->data;
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if (status != 0) {
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printf("putValueCb: %s \n", raft_errmsg(r));
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} else {
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printf("putValueCb: %s \n", "ok");
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}
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}
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void putValue(struct raft *r, const char *value) {
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struct raft_buffer buf;
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buf.len = TOKEN_LEN;;
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buf.base = raft_malloc(buf.len);
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snprintf(buf.base, buf.len, "%s", value);
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struct raft_apply *req = raft_malloc(sizeof(struct raft_apply));
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req->data = r;
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int ret = raft_apply(r, req, &buf, 1, putValueCb);
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if (ret == 0) {
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printf("put %s \n", (char*)buf.base);
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} else {
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printf("put error: %s \n", raft_errmsg(r));
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}
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}
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void getValue(const char *key) {
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char *ptr = getKV(key);
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if (ptr) {
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printf("get value: [%s] \n", ptr);
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} else {
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printf("value not found for key: [%s] \n", key);
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}
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}
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void console(SRaftServer *pRaftServer) {
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while (1) {
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char cmd_buf[COMMAND_LEN];
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@ -40,7 +182,68 @@ void console(SRaftServer *pRaftServer) {
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continue;
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}
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printf("cmd_buf: [%s] \n", cmd_buf);
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char cmd[TOKEN_LEN];
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memset(cmd, 0, sizeof(cmd));
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char param1[TOKEN_LEN];
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memset(param1, 0, sizeof(param1));
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char param2[TOKEN_LEN];
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memset(param2, 0, sizeof(param2));
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parseCommand(cmd_buf, cmd, param1, param2, TOKEN_LEN);
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if (strcmp(cmd, "addnode") == 0) {
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printf("not support \n");
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/*
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char host[HOST_LEN];
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uint32_t port;
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parseAddr(param1, host, HOST_LEN, &port);
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uint64_t rid = raftId(host, port);
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struct raft_change *req = raft_malloc(sizeof(*req));
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int r = raft_add(&pRaftServer->raft, req, rid, param1, NULL);
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if (r != 0) {
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printf("raft_add: %s \n", raft_errmsg(&pRaftServer->raft));
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}
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printf("add node: %lu %s \n", rid, param1);
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struct raft_change *req2 = raft_malloc(sizeof(*req2));
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r = raft_assign(&pRaftServer->raft, req2, rid, RAFT_VOTER, NULL);
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if (r != 0) {
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printf("raft_assign: %s \n", raft_errmsg(&pRaftServer->raft));
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}
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*/
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} else if (strcmp(cmd, "dropnode") == 0) {
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printf("not support \n");
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} else if (strcmp(cmd, "put") == 0) {
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char buf[256];
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snprintf(buf, sizeof(buf), "%s--%s", param1, param2);
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putValue(&pRaftServer->raft, buf);
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} else if (strcmp(cmd, "get") == 0) {
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getValue(param1);
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} else if (strcmp(cmd, "state") == 0) {
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printRaftState(&pRaftServer->raft);
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} else if (strcmp(cmd, "snapshot") == 0) {
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printf("not support \n");
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} else if (strcmp(cmd, "help") == 0) {
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printf("addnode \"127.0.0.1:8888\" \n");
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printf("dropnode \"127.0.0.1:8888\" \n");
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printf("put key value \n");
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printf("get key \n");
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printf("state \n");
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} else {
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printf("unknown command: [%s], type \"help\" to see help \n", cmd);
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}
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//printf("cmd_buf: [%s] \n", cmd_buf);
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}
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}
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@ -51,38 +254,86 @@ void *startConsoleFunc(void *param) {
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}
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// Config ---------------------------------
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typedef struct SRaftServerConfig {
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char host[HOST_LEN];
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uint32_t port;
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char dir[DIR_LEN];
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} SRaftServerConfig;
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void usage() {
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printf("\nusage: \n");
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printf("%s --me=127.0.0.1:10000 --dir=./data \n", exe_name);
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printf("\n");
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printf("%s --me=127.0.0.1:10000 --peers=127.0.0.1:10001,127.0.0.1:10002 --dir=./data \n", exe_name);
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printf("%s --me=127.0.0.1:10001 --peers=127.0.0.1:10000,127.0.0.1:10002 --dir=./data \n", exe_name);
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printf("%s --me=127.0.0.1:10002 --peers=127.0.0.1:10000,127.0.0.1:10001 --dir=./data \n", exe_name);
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printf("\n");
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}
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void parseConf(int argc, char **argv, SRaftServerConfig *pConf) {
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snprintf(pConf->host, sizeof(pConf->host), "%s", argv[1]);
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sscanf(argv[2], "%u", &pConf->port);
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snprintf(pConf->dir, sizeof(pConf->dir), "%s", argv[3]);
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memset(pConf, 0, sizeof(*pConf));
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int option_index, option_value;
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option_index = 0;
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static struct option long_options[] = {
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{"help", no_argument, NULL, 'h'},
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{"peers", required_argument, NULL, 'p'},
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{"me", required_argument, NULL, 'm'},
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{"dir", required_argument, NULL, 'd'},
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{NULL, 0, NULL, 0}
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};
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while ((option_value = getopt_long(argc, argv, "hp:m:d:", long_options, &option_index)) != -1) {
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switch (option_value) {
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case 'm': {
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parseAddr(optarg, pConf->me.host, sizeof(pConf->me.host), &pConf->me.port);
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break;
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}
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case 'p': {
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char tokens[MAX_PEERS][MAX_TOKEN_LEN];
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int peerCount = splitString(optarg, ",", tokens, MAX_PEERS);
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pConf->peersCount = peerCount;
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for (int i = 0; i < peerCount; ++i) {
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Addr *pAddr = &pConf->peers[i];
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parseAddr(tokens[i], pAddr->host, sizeof(pAddr->host), &pAddr->port);
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}
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break;
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}
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case 'd': {
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snprintf(pConf->dir, sizeof(pConf->dir), "%s", optarg);
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break;
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}
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case 'h': {
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usage();
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exit(-1);
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}
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default: {
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usage();
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exit(-1);
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}
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}
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}
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snprintf(pConf->dataDir, sizeof(pConf->dataDir), "%s/%s:%u", pConf->dir, pConf->me.host, pConf->me.port);
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}
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void printConf(SRaftServerConfig *pConf) {
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printf("conf: %s:%u %s \n", pConf->host, pConf->port, pConf->dir);
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printf("\nconf: \n");
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printf("me: %s:%u \n", pConf->me.host, pConf->me.port);
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printf("peersCount: %d \n", pConf->peersCount);
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for (int i = 0; i < pConf->peersCount; ++i) {
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Addr *pAddr = &pConf->peers[i];
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printf("peer%d: %s:%u \n", i, pAddr->host, pAddr->port);
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}
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printf("dataDir: %s \n\n", pConf->dataDir);
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}
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// -----------------------------------------
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void usage() {
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printf("\n");
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printf("usage: %s host port dir \n", exe_name);
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printf("\n");
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printf("eg: \n");
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printf("%s 127.0.0.1 10000 ./data \n", exe_name);
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printf("\n");
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}
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int main(int argc, char **argv) {
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srand(time(NULL));
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int32_t ret;
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exe_name = argv[0];
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if (argc != 4) {
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if (argc < 3) {
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usage();
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exit(-1);
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}
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@ -91,11 +342,15 @@ int main(int argc, char **argv) {
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parseConf(argc, argv, &conf);
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printConf(&conf);
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char cmd_buf[COMMAND_LEN];
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snprintf(cmd_buf, sizeof(cmd_buf), "mkdir -p %s", conf.dataDir);
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system(cmd_buf);
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struct raft_fsm fsm;
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initFsm(&fsm);
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SRaftServer raftServer;
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ret = raftServerInit(&raftServer, conf.host, conf.port, conf.dir, &fsm);
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ret = raftServerInit(&raftServer, &conf, &fsm);
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assert(ret == 0);
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pthread_t tidRaftServer;
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@ -2,6 +2,70 @@
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#include "common.h"
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#include "raftServer.h"
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char *keys;
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char *values;
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void initStore() {
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keys = malloc(MAX_RECORD_COUNT * MAX_KV_LEN);
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values = malloc(MAX_RECORD_COUNT * MAX_KV_LEN);
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writeIndex = 0;
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}
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void destroyStore() {
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free(keys);
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free(values);
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}
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void putKV(const char *key, const char *value) {
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if (writeIndex < MAX_RECORD_COUNT) {
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strncpy(&keys[writeIndex], key, MAX_KV_LEN);
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strncpy(&values[writeIndex], value, MAX_KV_LEN);
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writeIndex++;
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}
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}
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char *getKV(const char *key) {
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for (int i = 0; i < MAX_RECORD_COUNT; ++i) {
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if (strcmp(&keys[i], key) == 0) {
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return &values[i];
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}
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}
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return NULL;
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}
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int splitString(const char* str, char* separator, char (*arr)[MAX_TOKEN_LEN], int n_arr)
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{
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if (n_arr <= 0) {
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return -1;
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}
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char* tmp = (char*)malloc(strlen(str) + 1);
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strcpy(tmp, str);
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char* context;
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int n = 0;
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char* token = strtok_r(tmp, separator, &context);
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if (!token) {
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goto ret;
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}
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strncpy(arr[n], token, MAX_TOKEN_LEN);
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n++;
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while (1) {
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token = strtok_r(NULL, separator, &context);
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if (!token || n >= n_arr) {
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goto ret;
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}
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strncpy(arr[n], token, MAX_TOKEN_LEN);
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n++;
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}
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ret:
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free(tmp);
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return n;
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}
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uint64_t raftId(const char *host, uint32_t port) {
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uint32_t host_uint32 = (uint32_t)inet_addr(host);
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assert(host_uint32 != (uint32_t)-1);
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@ -9,17 +73,13 @@ uint64_t raftId(const char *host, uint32_t port) {
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return code;
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}
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int32_t raftServerInit(SRaftServer *pRaftServer, const char *host, uint32_t port, const char *dir, struct raft_fsm *pFsm) {
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int32_t raftServerInit(SRaftServer *pRaftServer, const SRaftServerConfig *pConf, struct raft_fsm *pFsm) {
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int ret;
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char cmd_buf[COMMAND_LEN];
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snprintf(cmd_buf, sizeof(cmd_buf), "mkdir -p %s", dir);
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system(cmd_buf);
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snprintf(pRaftServer->host, sizeof(pRaftServer->host), "%s", host);
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pRaftServer->port = port;
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snprintf(pRaftServer->address, sizeof(pRaftServer->address), "%s:%u", host, port);
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strncpy(pRaftServer->dir, dir, sizeof(pRaftServer->dir));
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snprintf(pRaftServer->host, sizeof(pRaftServer->host), "%s", pConf->me.host);
|
||||
pRaftServer->port = pConf->me.port;
|
||||
snprintf(pRaftServer->address, sizeof(pRaftServer->address), "%s:%u", pRaftServer->host, pRaftServer->port);
|
||||
strncpy(pRaftServer->dir, pConf->dataDir, sizeof(pRaftServer->dir));
|
||||
|
||||
pRaftServer->raftId = raftId(pRaftServer->host, pRaftServer->port);
|
||||
pRaftServer->fsm = pFsm;
|
||||
|
|
@ -34,7 +94,7 @@ int32_t raftServerInit(SRaftServer *pRaftServer, const char *host, uint32_t port
|
|||
fprintf(stderr, "%s \n", raft_errmsg(&pRaftServer->raft));
|
||||
}
|
||||
|
||||
ret = raft_uv_init(&pRaftServer->io, &pRaftServer->loop, dir, &pRaftServer->transport);
|
||||
ret = raft_uv_init(&pRaftServer->io, &pRaftServer->loop, pRaftServer->dir, &pRaftServer->transport);
|
||||
if (!ret) {
|
||||
fprintf(stderr, "%s \n", raft_errmsg(&pRaftServer->raft));
|
||||
}
|
||||
|
|
@ -47,6 +107,16 @@ int32_t raftServerInit(SRaftServer *pRaftServer, const char *host, uint32_t port
|
|||
struct raft_configuration conf;
|
||||
raft_configuration_init(&conf);
|
||||
raft_configuration_add(&conf, pRaftServer->raftId, pRaftServer->address, RAFT_VOTER);
|
||||
printf("add myself: %llu - %s \n", pRaftServer->raftId, pRaftServer->address);
|
||||
for (int i = 0; i < pConf->peersCount; ++i) {
|
||||
const Addr *pAddr = &pConf->peers[i];
|
||||
raft_id rid = raftId(pAddr->host, pAddr->port);
|
||||
char addrBuf[ADDRESS_LEN];
|
||||
snprintf(addrBuf, sizeof(addrBuf), "%s:%u", pAddr->host, pAddr->port);
|
||||
raft_configuration_add(&conf, rid, addrBuf, RAFT_VOTER);
|
||||
printf("add peers: %llu - %s \n", rid, addrBuf);
|
||||
}
|
||||
|
||||
raft_bootstrap(&pRaftServer->raft, &conf);
|
||||
|
||||
return 0;
|
||||
|
|
@ -70,12 +140,17 @@ void raftServerClose(SRaftServer *pRaftServer) {
|
|||
|
||||
int fsmApplyCb(struct raft_fsm *pFsm, const struct raft_buffer *buf, void **result) {
|
||||
char *msg = (char*)buf->base;
|
||||
printf("%s \n", msg);
|
||||
printf("fsm apply: %s \n", msg);
|
||||
|
||||
char arr[2][MAX_TOKEN_LEN];
|
||||
splitString(msg, "--", arr, 2);
|
||||
putKV(arr[0], arr[1]);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int32_t initFsm(struct raft_fsm *fsm) {
|
||||
initStore();
|
||||
fsm->apply = fsmApplyCb;
|
||||
return 0;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -11,12 +11,23 @@ extern "C" {
|
|||
#include <string.h>
|
||||
#include "raft.h"
|
||||
#include "raft/uv.h"
|
||||
#include "common.h"
|
||||
|
||||
|
||||
// simulate a db store, just for test
|
||||
#define MAX_KV_LEN 100
|
||||
#define MAX_RECORD_COUNT 500
|
||||
char *keys;
|
||||
char *values;
|
||||
int writeIndex;
|
||||
|
||||
void initStore();
|
||||
void destroyStore();
|
||||
void putKV(const char *key, const char *value);
|
||||
char *getKV(const char *key);
|
||||
|
||||
#define DIR_LEN 128
|
||||
#define HOST_LEN 128
|
||||
#define ADDRESS_LEN (HOST_LEN + 16)
|
||||
typedef struct {
|
||||
char dir[DIR_LEN]; /* Data dir of UV I/O backend */
|
||||
char dir[DIR_LEN + HOST_LEN * 2]; /* Data dir of UV I/O backend */
|
||||
char host[HOST_LEN];
|
||||
uint32_t port;
|
||||
char address[ADDRESS_LEN]; /* Raft instance address */
|
||||
|
|
@ -29,7 +40,11 @@ typedef struct {
|
|||
struct raft_uv_transport transport; /* UV I/O backend transport */
|
||||
} SRaftServer;
|
||||
|
||||
int32_t raftServerInit(SRaftServer *pRaftServer, const char *host, uint32_t port, const char *dir, struct raft_fsm *pFsm);
|
||||
#define MAX_TOKEN_LEN 32
|
||||
int splitString(const char* str, char* separator, char (*arr)[MAX_TOKEN_LEN], int n_arr);
|
||||
|
||||
uint64_t raftId(const char *host, uint32_t port);
|
||||
int32_t raftServerInit(SRaftServer *pRaftServer, const SRaftServerConfig *pConf, struct raft_fsm *pFsm);
|
||||
int32_t raftServerStart(SRaftServer *pRaftServer);
|
||||
void raftServerClose(SRaftServer *pRaftServer);
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue