/*
* redis_log_hook
* Hook for shipping log events to Redis
* (based on jsonlog.c)
*/
static void
redis_log_hook(ErrorData *edata)
{
StringInfoData buf;
TransactionId txid = GetTopTransactionIdIfAny();
bool print_stmt = false;
bool send_status = false;
/* static counter for line numbers */
static long log_line_number = 0;
/*
* This is one of the few places where we'd rather not inherit a static
* variable's value from the postmaster. But since we will, reset it when
* MyProcPid changes.
*/
if (lastPid != MyProcPid)
{
log_line_number = 0;
lastPid = MyProcPid;
formatted_start_time[0] = '\0';
redis_close_connection();
}
/*
* Check if the log has to be written, if not just exit.
*/
if (!is_log_level_output(edata->elevel, Redislog_min_messages))
{
goto quickExit;
}
log_line_number++;
initStringInfo(&buf);
/* Initialize string */
appendStringInfoChar(&buf, '{');
/* Timestamp */
setup_formatted_log_time();
append_json_literal(&buf, "@timestamp", formatted_log_time, true);
/* Username */
if (MyProcPort)
append_json_literal(&buf, "user_name", MyProcPort->user_name, true);
/* Database name */
if (MyProcPort)
append_json_literal(&buf, "database_name", MyProcPort->database_name, true);
/* Process ID */
if (MyProcPid != 0)
appendStringInfo(&buf, "\"process_id\":%d,", MyProcPid);
/* Remote host and port */
if (MyProcPort && MyProcPort->remote_host)
{
append_json_literal(&buf, "remote_host",
MyProcPort->remote_host, true);
if (MyProcPort->remote_port && MyProcPort->remote_port[0] != '\0')
append_json_literal(&buf, "remote_port",
MyProcPort->remote_port, true);
}
/* Session id */
if (MyProcPid != 0)
appendStringInfo(&buf, "\"session_id\":\"%lx.%x\",",
(long) MyStartTime, MyProcPid);
/* Process ID */
if (MyProcPid != 0)
appendStringInfo(&buf, "\"session_line_num\":%ld,", log_line_number);
/* PS display */
if (MyProcPort)
{
StringInfoData msgbuf;
const char *psdisp;
int displen;
initStringInfo(&msgbuf);
psdisp = get_ps_display(&displen);
appendBinaryStringInfo(&msgbuf, psdisp, displen);
append_json_literal(&buf, "command_tag", msgbuf.data, true);
pfree(msgbuf.data);
}
/* session start timestamp */
if (formatted_start_time[0] == '\0')
setup_formatted_start_time();
append_json_literal(&buf, "session_start_time", formatted_start_time, true);
/* Virtual transaction id */
/* keep VXID format in sync with lockfuncs.c */
if (MyProc != NULL && MyProc->backendId != InvalidBackendId)
appendStringInfo(&buf, "\"virtual_transaction_id\":\"%d/%u\",",
MyProc->backendId, MyProc->lxid);
/* Transaction id */
if (txid != InvalidTransactionId)
appendStringInfo(&buf, "\"transaction_id\":%u,", GetTopTransactionIdIfAny());
/* Error severity */
append_json_literal(&buf, "error_severity",
(char *) error_severity(edata->elevel), true);
/* SQL state code */
if (edata->sqlerrcode != ERRCODE_SUCCESSFUL_COMPLETION)
append_json_literal(&buf, "sql_state_code",
unpack_sql_state(edata->sqlerrcode), true);
/* Error detail or Error detail log */
if (edata->detail_log)
append_json_literal(&buf, "detail_log", edata->detail_log, true);
else if (edata->detail)
append_json_literal(&buf, "detail", edata->detail, true);
/* Error hint */
if (edata->hint)
append_json_literal(&buf, "hint", edata->hint, true);
/* Internal query */
if (edata->internalquery)
append_json_literal(&buf, "internal_query",
edata->internalquery, true);
/* if printed internal query, print internal pos too */
if (edata->internalpos > 0 && edata->internalquery != NULL)
appendStringInfo(&buf, "\"internal_query_pos\":%d,", edata->internalpos);
/* Error context */
if (edata->context)
append_json_literal(&buf, "context", edata->context, true);
/* user query --- only reported if not disabled by the caller */
if (is_log_level_output(edata->elevel, Redislog_min_error_statement) &&
debug_query_string != NULL &&
!edata->hide_stmt)
print_stmt = true;
if (print_stmt)
append_json_literal(&buf, "query", debug_query_string, true);
/* user query position -- only reposted if not disabled by the caller */
if (print_stmt && edata->cursorpos > 0)
appendStringInfo(&buf, "\"query_pos\":%d,", edata->cursorpos);
/* File error location */
if (Log_error_verbosity >= PGERROR_VERBOSE)
{
StringInfoData msgbuf;
initStringInfo(&msgbuf);
if (edata->funcname && edata->filename)
appendStringInfo(&msgbuf, "%s, %s:%d",
edata->funcname, edata->filename,
edata->lineno);
else if (edata->filename)
appendStringInfo(&msgbuf, "%s:%d",
edata->filename, edata->lineno);
append_json_literal(&buf, "file_location", msgbuf.data, true);
pfree(msgbuf.data);
}
/* Application name */
if (application_name && application_name[0] != '\0')
append_json_literal(&buf, "application_name",
application_name, true);
/* Error message */
append_json_literal(&buf, "message", edata->message, false);
/* Finish string */
appendStringInfoChar(&buf, '}');
appendStringInfoChar(&buf, '\n');
/* Send the data to Redis */
send_status = redis_log_shipper(buf.data, buf.len);
/* Skip sending the event to the server, if it was correctly
* shipped to Redis and if 'ship_to_redis_only' is set to true
*/
if (Redislog_ship_to_redis_only && send_status) {
edata->output_to_server = false;
}
/* Cleanup */
pfree(buf.data);
quickExit:
/* Continue chain to previous hook */
if (prev_log_hook)
(*prev_log_hook) (edata);
}
/*
* write_jsonlog
* Write logs in json format.
*/
static void
write_jsonlog(ErrorData *edata)
{
StringInfoData buf;
TransactionId txid = GetTopTransactionIdIfAny();
/*
* Disable logs to server, we don't want duplicate entries in
* the server.
*/
edata->output_to_server = false;
/* Determine whether message is enabled for server log output */
if (!is_log_level_output(edata->elevel, log_min_messages))
return;
initStringInfo(&buf);
/* Initialize string */
appendStringInfoChar(&buf, '{');
/* Timestamp */
setup_formatted_log_time();
appendJSONLiteral(&buf, "timestamp", formatted_log_time, true);
/* Username */
if (MyProcPort && MyProcPort->user_name)
appendJSONLiteral(&buf, "user", MyProcPort->user_name, true);
/* Database name */
if (MyProcPort && MyProcPort->database_name)
appendJSONLiteral(&buf, "dbname", MyProcPort->database_name, true);
/* Process ID */
if (MyProcPid != 0)
appendStringInfo(&buf, "\"pid\":%d,", MyProcPid);
/* Remote host and port */
if (MyProcPort && MyProcPort->remote_host)
{
appendJSONLiteral(&buf, "remote_host",
MyProcPort->remote_host, true);
if (MyProcPort->remote_port && MyProcPort->remote_port[0] != '\0')
appendJSONLiteral(&buf, "remote_port",
MyProcPort->remote_port, true);
}
/* Session id */
if (MyProcPid != 0)
appendStringInfo(&buf, "\"session_id\":\"%lx.%x\",",
(long) MyStartTime, MyProcPid);
/* Virtual transaction id */
/* keep VXID format in sync with lockfuncs.c */
if (MyProc != NULL && MyProc->backendId != InvalidBackendId)
appendStringInfo(&buf, "\"vxid\":\"%d/%u\",",
MyProc->backendId, MyProc->lxid);
/* Transaction id */
if (txid != InvalidTransactionId)
appendStringInfo(&buf, "\"txid\":%u,", GetTopTransactionIdIfAny());
/* Error severity */
appendJSONLiteral(&buf, "error_severity",
(char *) error_severity(edata->elevel), true);
/* SQL state code */
if (edata->sqlerrcode != ERRCODE_SUCCESSFUL_COMPLETION)
appendJSONLiteral(&buf, "state_code",
unpack_sql_state(edata->sqlerrcode), true);
/* Error detail or Error detail log */
if (edata->detail_log)
appendJSONLiteral(&buf, "detail_log", edata->detail_log, true);
else if (edata->detail)
appendJSONLiteral(&buf, "detail", edata->detail, true);
/* Error hint */
if (edata->hint)
appendJSONLiteral(&buf, "hint", edata->hint, true);
/* Internal query */
if (edata->internalquery)
appendJSONLiteral(&buf, "internal_query",
edata->internalquery, true);
/* Error context */
if (edata->context)
appendJSONLiteral(&buf, "context", edata->context, true);
/* user query --- only reported if not disabled by the caller */
if (is_log_level_output(edata->elevel, log_min_error_statement) &&
debug_query_string != NULL &&
!edata->hide_stmt)
{
appendJSONLiteral(&buf, "statement", debug_query_string, true);
if (edata->cursorpos > 0)
appendStringInfo(&buf, "\"cursor_position\":%d,",
edata->cursorpos);
else if (edata->internalpos > 0)
appendStringInfo(&buf, "\"internal_position\":%d,",
edata->internalpos);
}
/* File error location */
if (Log_error_verbosity >= PGERROR_VERBOSE)
{
StringInfoData msgbuf;
initStringInfo(&msgbuf);
if (edata->funcname && edata->filename)
appendStringInfo(&msgbuf, "%s, %s:%d",
edata->funcname, edata->filename,
edata->lineno);
else if (edata->filename)
appendStringInfo(&msgbuf, "%s:%d",
edata->filename, edata->lineno);
appendJSONLiteral(&buf, "file_location", msgbuf.data, true);
pfree(msgbuf.data);
}
/* Application name */
if (application_name && application_name[0] != '\0')
appendJSONLiteral(&buf, "application_name",
application_name, true);
/* Error message */
appendJSONLiteral(&buf, "message", edata->message, false);
/* Finish string */
appendStringInfoChar(&buf, '}');
appendStringInfoChar(&buf, '\n');
/* Write to stderr, if enabled */
if ((Log_destination & LOG_DESTINATION_STDERR) != 0)
{
if (Logging_collector && redirection_done && !am_syslogger)
write_pipe_chunks(buf.data, buf.len);
else
write_console(buf.data, buf.len);
}
/* If in the syslogger process, try to write messages direct to file */
if (am_syslogger)
write_syslogger_file(buf.data, buf.len, LOG_DESTINATION_STDERR);
/* Cleanup */
pfree(buf.data);
/* Continue chain to previous hook */
if (prev_log_hook)
(*prev_log_hook) (edata);
}