在使用tomcat server.xml或web.xml創建新日誌之前備份日誌文件

Question

我正在研究將信息和錯誤記錄器作爲日誌供我們參考的文本文件寫入的Java應用程序。該文件正在大幅增長，所以我需要檢查文件的大小...例如，如果文件大小超過10 Mb，我必須創建另一個文件。

像這樣，我必須創建10個文件，一個接一個地旋轉，直到10個文件。達到10個文件後，我必須刪除開始文件並重新開始創建...

如何刪除文件後的否。的文件將成爲10？

此操作的主要限制是試圖在不使用log4j或logback庫的情況下完成要求。

Logging.properties

1catalina.org.apache.juli.AsyncFileHandler.level = FINE 
1catalina.org.apache.juli.AsyncFileHandler.directory = ${catalina.base}/logs 
1catalina.org.apache.juli.AsyncFileHandler.prefix = catalina. 

2localhost.org.apache.juli.AsyncFileHandler.level = FINE 
2localhost.org.apache.juli.AsyncFileHandler.directory = ${catalina.base}/logs 
2localhost.org.apache.juli.AsyncFileHandler.prefix = localhost. 

3manager.org.apache.juli.AsyncFileHandler.level = FINE 
3manager.org.apache.juli.AsyncFileHandler.directory = ${catalina.base}/logs 
3manager.org.apache.juli.AsyncFileHandler.prefix = manager. 

4host-manager.org.apache.juli.AsyncFileHandler.level = FINE 
4host-manager.org.apache.juli.AsyncFileHandler.directory = ${catalina.base}/logs 
4host-manager.org.apache.juli.AsyncFileHandler.prefix = host-manager. 

java.util.logging.ConsoleHandler.level = FINE 
java.util.logging.ConsoleHandler.formatter = org.apache.juli.OneLineFormatter 


############################################################ 
# Facility specific properties. 
# Provides extra control for each logger. 
############################################################ 

org.apache.catalina.core.ContainerBase.[Catalina].[localhost].level = INFO 
org.apache.catalina.core.ContainerBase.[Catalina].[localhost].handlers = 2localhost.org.apache.juli.AsyncFileHandler 

org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/manager].level = INFO 
org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/manager].handlers = 3manager.org.apache.juli.AsyncFileHandler 

org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/host-manager].level = INFO 
org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/host-manager].handlers = 4host-manager.org.apache.juli.AsyncFileHandler 

Answer 1

鑑於你的限制，你可以使用java.util.logging.FileHandler代替org.apache.juli.AsyncFileHandler。

1catalina.org.apache.juli.AsyncFileHandler.level = FINE 
1catalina.org.apache.juli.AsyncFileHandler.directory = ${catalina.base}/logs 
1catalina.org.apache.juli.AsyncFileHandler.prefix = catalina. 

2localhost.java.util.logging.FileHandler.level = FINE 
2localhost.java.util.logging.FileHandler.limit = 10000000 
2localhost.java.util.logging.FileHandler.count = 10 
2localhost.java.util.logging.FileHandler.pattern = ${catalina.base}/logs/localhost%g.log 

3manager.org.apache.juli.AsyncFileHandler.level = FINE 
3manager.org.apache.juli.AsyncFileHandler.directory = ${catalina.base}/logs 
3manager.org.apache.juli.AsyncFileHandler.prefix = manager. 

4host-manager.org.apache.juli.AsyncFileHandler.level = FINE 
4host-manager.org.apache.juli.AsyncFileHandler.directory = ${catalina.base}/logs 
4host-manager.org.apache.juli.AsyncFileHandler.prefix = host-manager. 

java.util.logging.ConsoleHandler.level = FINE 
java.util.logging.ConsoleHandler.formatter = org.apache.juli.OneLineFormatter 


############################################################ 
# Facility specific properties. 
# Provides extra control for each logger. 
############################################################ 

org.apache.catalina.core.ContainerBase.[Catalina].[localhost].level = INFO 
org.apache.catalina.core.ContainerBase.[Catalina].[localhost].handlers = 2localhost.org.apache.juli.AsyncFileHandler 

org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/manager].level = INFO 
org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/manager].handlers = 3manager.org.apache.juli.AsyncFileHandler 

org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/host-manager].level = INFO 
org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/host-manager].handlers = 4host-manager.org.apache.juli.AsyncFileHandler 

你必須modify的logging.properties這樣你就可以安裝JUL的FileHandler。