获取当前文件大小 - LogGetCurrentFileSize

函数简介

获取当前日志文件的大小（字节）。

接口名称

LogGetCurrentFileSize

DLL调用

int64_t LogGetCurrentFileSize(int64_t instance, int64_t loggerHandle);

参数说明

参数名	类型	说明
instance	长整数型	OLAPlug对象的指针，由 CreateCOLAPlugInterFace 接口生成。
loggerHandle	长整数型	日志实例句柄（0 表示默认实例）。

示例

写日志后查询当前文件大小（字节）。

SDK 调用

#include "OLAPlugServer.h"
#include <cstdio>

OLAPlugServer ola;
const int64_t logger = 0; // 默认实例

ola.LogSetFilePath(logger, "D:\\logs\\app.log");
ola.LogInfo("size probe line");
ola.LogFlush(logger);
int64_t size = ola.LogGetCurrentFileSize(logger);
std::printf("current file size(bytes): %lld\n", (long long)size);

using System;
using OLAPlug;

var ola = new OLAPlugServer();
long logger = 0;

ola.LogSetFilePath(logger, @"D:\logs\app.log");
ola.LogInfo("size probe line");
ola.LogFlush(logger);
long size = ola.LogGetCurrentFileSize(logger);
Console.WriteLine("current file size(bytes): " + size);

from OLAPlugServer import OLAPlugServer

ola = OLAPlugServer()
logger = 0

ola.LogSetFilePath(logger, r"D:\logs\app.log")
ola.LogInfo("size probe line")
ola.LogFlush(logger)
size = ola.LogGetCurrentFileSize(logger)
print("current file size(bytes):", size)

import com.olaplug.OLAPlugServer;

OLAPlugServer ola = new OLAPlugServer();
long logger = 0;

ola.LogSetFilePath(logger, "D:\\logs\\app.log");
ola.LogInfo("size probe line");
ola.LogFlush(logger);
long size = ola.LogGetCurrentFileSize(logger);
System.out.println("current file size(bytes): " + size);

import (
    "fmt"
    "github.com/ola/olaplug/olaplug"
)

ola, _ := olaplug.NewOLAPlugServer("OLAPlug_x64.dll")
defer ola.ReleaseObj()
logger := int64(0)

ola.LogSetFilePath(logger, `D:\logs\app.log`)
ola.LogInfo("size probe line")
ola.LogFlush(logger)
size := ola.LogGetCurrentFileSize(logger)
fmt.Println("current file size(bytes):", size)

use olaplug::OLAPlugServer;

let ola = OLAPlugServer::new("OLAPlug_x64.dll").unwrap();
let logger = 0i64;

ola.log_set_file_path(logger, r"D:\logs\app.log");
ola.log_info("size probe line");
ola.log_flush(logger);
let size = ola.log_get_current_file_size(logger);
println!("current file size(bytes): {}", size);

var ola = com("OlaPlug.OlaSoft")
var logger = 0

ola.LogSetFilePath(logger, "D:\\logs\\app.log")
ola.LogInfo("size probe line")
ola.LogFlush(logger)
var size = ola.LogGetCurrentFileSize(logger)
traceprint("current file size(bytes): " + size)

Set ola = CreateObject("OlaPlug.OlaSoft")
logger = 0

ola.LogSetFilePath logger, "D:\logs\app.log"
ola.LogInfo "size probe line"
ola.LogFlush logger
size = ola.LogGetCurrentFileSize(logger)
TracePrint "current file size(bytes): " & size

.局部变量 ola, OLAPlug
.局部变量 ret, 整数型
.局部变量 logger, 长整数型
.局部变量 size, 长整数型

ola.Create ()
logger ＝ 0

ola.LogSetFilePath (logger, “D:\logs\app.log”)
ola.LogInfo (“size probe line”)
ola.LogFlush (logger)
size ＝ ola.LogGetCurrentFileSize (logger)
调试输出 (“current file size(bytes)：”, size)

import OLAPlugServer;
var ola = OLAPlugServer();
var logger = 0;

ola.LogSetFilePath(logger, "D:\\logs\\app.log");
ola.LogInfo("size probe line");
ola.LogFlush(logger);
var size = ola.LogGetCurrentFileSize(logger);
io.print("current file size(bytes): ", size);

变量 ola <类型 = OLAPlugServer>
ola = 新建 OLAPlugServer
长整数 logger = 0

ola.LogSetFilePath(logger, "D:\\logs\\app.log")
ola.LogInfo("size probe line")
ola.LogFlush(logger)
长整数 size = ola.LogGetCurrentFileSize(logger)
调试输出 ("current file size(bytes)：", size)

#include "OLAPlugServer.h"
#include <cstdio>

OLAPlugServer ola;
int64_t logger = 0;

ola.LogSetFilePath(logger, "D:\\logs\\app.log");
ola.LogInfo("size probe line");
ola.LogFlush(logger);
int64_t size = ola.LogGetCurrentFileSize(logger);
std::printf("current file size(bytes): %lld\n", (long long)size);

原生 DLL 调用

long instance = CreateCOLAPlugInterFace();
long logger = 0;

LogSetFilePath(instance, logger, "D:\\logs\\app.log");
LogInfo(instance, "size probe line");
LogFlush(instance, logger);
int64_t size = LogGetCurrentFileSize(instance, logger);

using System.Runtime.InteropServices;

[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern long CreateCOLAPlugInterFace();
[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern int LogSetFilePath(long ola, long loggerHandle, string logFilePath);
[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern int LogInfo(long ola, string message);
[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern int LogFlush(long ola, long loggerHandle);
[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern long LogGetCurrentFileSize(long ola, long loggerHandle);

long instance = CreateCOLAPlugInterFace();
long logger = 0;

LogSetFilePath(instance, logger, @"D:\logs\app.log");
LogInfo(instance, "size probe line");
LogFlush(instance, logger);
long size = LogGetCurrentFileSize(instance, logger);

from ctypes import CDLL, c_int, c_int64

ola = CDLL("OLAPlug_x64.dll")
ola.CreateCOLAPlugInterFace.restype = c_int64
instance = ola.CreateCOLAPlugInterFace()
logger = 0

ola.LogSetFilePath(instance, logger, b"D:\\logs\\app.log")
ola.LogInfo(instance, b"size probe line")
ola.LogFlush(instance, logger)
print("current file size(bytes):", ola.LogGetCurrentFileSize(instance, logger))

返回值

返回值	说明
（返回值）	文件大小（长整数型，单位：字节），失败返回 -1。

注意事项

项目	说明
返回值单位是字节（Byte）	返回值单位是字节（Byte）。
如果日志系统未初始化	如果日志系统未初始化，返回 -1。
文件大小会随着日志写入而增长	文件大小会随着日志写入而增长。
达到 LogSetMaxFileSize 设	达到 LogSetMaxFileSize 设置的大小时会自动分割。
可以用于监控日志文件大小	可以用于监控日志文件大小，实现自定义的分割策略。