/**
* Invoked by the networking layer when there is new
* data to be handled. The connection handler should
* consume all the input possible, and generate responses
* to all requests.
* @arg handle The connection related information
* @return 0 on success.
*/
int handle_client_connect(bloom_conn_handler *handle) {
// Look for the next command line
char *buf, *arg_buf;
int buf_len, arg_buf_len, should_free;
int status;
while (1) {
status = extract_to_terminator(handle->conn, '\n', &buf, &buf_len, &should_free);
if (status == -1) break; // Return if no command is available
// Determine the command type
conn_cmd_type type = determine_client_command(buf, buf_len, &arg_buf, &arg_buf_len);
// Handle an error or unknown response
switch(type) {
case CHECK:
handle_check_cmd(handle, arg_buf, arg_buf_len);
break;
case CHECK_MULTI:
handle_check_multi_cmd(handle, arg_buf, arg_buf_len);
break;
case SET:
handle_set_cmd(handle, arg_buf, arg_buf_len);
break;
case SET_MULTI:
handle_set_multi_cmd(handle, arg_buf, arg_buf_len);
break;
case CREATE:
handle_create_cmd(handle, arg_buf, arg_buf_len);
break;
case DROP:
handle_drop_cmd(handle, arg_buf, arg_buf_len);
break;
case CLOSE:
handle_close_cmd(handle, arg_buf, arg_buf_len);
break;
case CLEAR:
handle_clear_cmd(handle, arg_buf, arg_buf_len);
break;
case LIST:
handle_list_cmd(handle, arg_buf, arg_buf_len);
break;
case INFO:
handle_info_cmd(handle, arg_buf, arg_buf_len);
break;
case FLUSH:
handle_flush_cmd(handle, arg_buf, arg_buf_len);
break;
default:
handle_client_err(handle->conn, (char*)&CMD_NOT_SUP, CMD_NOT_SUP_LEN);
break;
}
// Make sure to free the command buffer if we need to
if (should_free) free(buf);
}
return 0;
}
/**
* Invoked by the networking layer when there is new
* data to be handled. The connection handler should
* consume all the input possible, and generate responses
* to all requests.
* @arg handle The connection related information
* @return 0 on success.
*/
int handle_client_connect(statsite_conn_handler *handle) {
// Look for the next command line
char *buf, *key, *val_str, *type_str, *endptr;
metric_type type;
int buf_len, should_free, status, i, after_len;
double val;
while (1) {
status = extract_to_terminator(handle->conn, '\n', &buf, &buf_len, &should_free);
if (status == -1) return 0; // Return if no command is available
// Check for a valid metric
// Scan for the colon
status = buffer_after_terminator(buf, buf_len, ':', &val_str, &after_len);
if (!status) status |= buffer_after_terminator(val_str, after_len, '|', &type_str, &after_len);
if (status == 0) {
// Convert the type
switch (*type_str) {
case 'c':
type = COUNTER;
break;
case 'm':
type = TIMER;
break;
case 'k':
type = KEY_VAL;
break;
default:
type = UNKNOWN;
}
// Convert the value to a double
endptr = NULL;
val = strtod(val_str, &endptr);
// Store the sample if we did the conversion
if (val != 0 || endptr != val_str) {
metrics_add_sample(GLOBAL_METRICS, type, buf, val);
} else {
syslog(LOG_WARNING, "Failed value conversion! Input: %s", val_str);
}
} else {
syslog(LOG_WARNING, "Failed parse metric! Input: %s", buf);
}
// Make sure to free the command buffer if we need to
if (should_free) free(buf);
}
return 0;
}
/**
* Invoked to handle ASCII commands. This is the default
* mode for statsite, to be backwards compatible with statsd
* @arg handle The connection related information
* @return 0 on success.
*/
static int handle_ascii_client_connect(statsite_conn_handler *handle) {
// Look for the next command line
char *buf, *key, *val_str, *type_str, *sample_str, *endptr;
metric_type type;
int buf_len, should_free, status, i, after_len;
double val, sample_rate;
while (1) {
status = extract_to_terminator(handle->conn, '\n', &buf, &buf_len, &should_free);
if (status == -1) return 0; // Return if no command is available
// Check for a valid metric
// Scan for the colon
status = buffer_after_terminator(buf, buf_len, ':', &val_str, &after_len);
if (likely(!status)) status |= buffer_after_terminator(val_str, after_len, '|', &type_str, &after_len);
if (unlikely(status)) {
syslog(LOG_WARNING, "Failed parse metric! Input: %s", buf);
goto ERR_RET;
}
// Convert the type
switch (*type_str) {
case 'c':
type = COUNTER;
break;
case 'm':
type = TIMER;
break;
case 'k':
type = KEY_VAL;
break;
case 'g':
type = GAUGE;
// Check if this is a delta update
switch (*val_str) {
case '+':
// Advance past the + to avoid breaking str2double
val_str++;
case '-':
type = GAUGE_DELTA;
}
break;
case 's':
type = SET;
break;
default:
type = UNKNOWN;
syslog(LOG_WARNING, "Received unknown metric type! Input: %c", *type_str);
goto ERR_RET;
}
// Increment the number of inputs received
if (GLOBAL_CONFIG->input_counter)
metrics_add_sample(GLOBAL_METRICS, COUNTER, GLOBAL_CONFIG->input_counter, 1);
// Fast track the set-updates
if (type == SET) {
metrics_set_update(GLOBAL_METRICS, buf, val_str);
goto END_LOOP;
}
// Convert the value to a double
val = str2double(val_str, &endptr);
if (unlikely(endptr == val_str)) {
syslog(LOG_WARNING, "Failed value conversion! Input: %s", val_str);
goto ERR_RET;
}
// Handle counter sampling if applicable
if (type == COUNTER && !buffer_after_terminator(type_str, after_len, '@', &sample_str, &after_len)) {
sample_rate = str2double(sample_str, &endptr);
if (unlikely(endptr == sample_str)) {
syslog(LOG_WARNING, "Failed sample rate conversion! Input: %s", sample_str);
goto ERR_RET;
}
if (sample_rate > 0 && sample_rate <= 1) {
// Magnify the value
val = val * (1.0 / sample_rate);
}
}
// Store the sample
metrics_add_sample(GLOBAL_METRICS, type, buf, val);
END_LOOP:
// Make sure to free the command buffer if we need to
if (should_free) free(buf);
}
return 0;
ERR_RET:
if (should_free) free(buf);
return -1;
}
/**
* Invoked to handle ASCII commands. This is the default
* mode for statsite-proxy, to be backwards compatible with statsd
* @arg handle The connection related information
* @return 0 on success.
*/
static int handle_ascii_client_connect(statsite_proxy_conn_handler *handle) {
// Look for the next command line
char *buf, *val_str, *type_str;
metric_type type;
int buf_len, should_free, status, after_len, res;
while (1) {
status = extract_to_terminator(handle->conn, '\n', &buf, &buf_len, &should_free);
if (status == -1) return 0; // Return if no command is available
// Stack allocate space for message buffer
char* proxy_msg = alloca((buf_len)* sizeof(char));
strncpy(proxy_msg, buf, buf_len);
// Make sure to terminate strings
*(proxy_msg + buf_len-1) = '\n';
// Check for a valid metric
// Scan for the colon
status = buffer_after_terminator(buf, buf_len, ':', &val_str, &after_len);
if (!status) status |= buffer_after_terminator(val_str, after_len, '|', &type_str, &after_len);
if (status == 0) {
// Convert the type
switch (*type_str) {
case 'c':
type = COUNTER;
break;
case 'm':
type = TIMER;
break;
case 'k':
case 'g':
type = KEY_VAL;
break;
default:
type = UNKNOWN;
}
// Route metric via consistent hash based on metric key
void* conn;
res = proxy_get_route_conn(handle->proxy, buf, &conn);
if (res != 0) {
syslog(LOG_WARNING, "Failed to find metric route! Metric key: %s", buf);
}
// Forward metric
res = send_proxy_msg(conn, proxy_msg, buf_len);
if (res != 0) {
syslog(LOG_WARNING, "Failed to route metric route! Metric key: %s", buf);
}
} else {
syslog(LOG_WARNING, "Failed parse metric! Input: %s", buf);
}
// Make sure to free the command buffer if we need to
if (should_free) free(buf);
}
return 0;
}