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我使用logback的DBAppender將日誌消息輸出到PostgreSQL數據庫。這適用於我實現這個的初始應用程序,但是如果我將我的配置複製到另一個也使用logback的程序,則不起作用。爲什麼?爲什麼我無法重用Logback的DBAppender?
其他程序沒有發生錯誤,執行(和記錄)繼續,如同對logback.xml
文件未做任何更改一樣。
我的配置如下:
<configuration>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<charset>UTF-8</charset>
<pattern>%d{HH:mm:ss.SSS} [%thread] %highlight(%-5level) %cyan(%logger{35}) - %msg %n</pattern>
</encoder>
</appender>
<appender name="DB" class="ch.qos.logback.classic.db.DBAppender">
<connectionSource
class="ch.qos.logback.core.db.DataSourceConnectionSource">
<dataSource
class="com.mchange.v2.c3p0.ComboPooledDataSource">
<driverClass>org.postgresql.Driver</driverClass>
<jdbcUrl>jdbc:postgresql://ec2-xxx-21-xxx-162.compute-1.amazonaws.com:6232/mydatabase?user=myuser&password=mypw&ssl=true&sslfactory=org.postgresql.ssl.NonValidatingFactory</jdbcUrl>
</dataSource>
</connectionSource>
</appender>
<root level="DEBUG">
<appender-ref ref="STDOUT" />
<appender-ref ref="DB" />
</root>
</configuration>
表與PostgreSQL的腳本創建:
-- Logback: the reliable, generic, fast and flexible logging framework.
-- Copyright (C) 1999-2010, QOS.ch. All rights reserved.
--
-- See http://logback.qos.ch/license.html for the applicable licensing
-- conditions.
-- This SQL script creates the required tables by ch.qos.logback.classic.db.DBAppender
--
-- It is intended for PostgreSQL databases.
DROP TABLE logging_event_property;
DROP TABLE logging_event_exception;
DROP TABLE logging_event;
DROP SEQUENCE logging_event_id_seq;
CREATE SEQUENCE logging_event_id_seq MINVALUE 1 START 1;
CREATE TABLE logging_event
(
timestmp BIGINT NOT NULL,
formatted_message TEXT NOT NULL,
logger_name VARCHAR(254) NOT NULL,
level_string VARCHAR(254) NOT NULL,
thread_name VARCHAR(254),
reference_flag SMALLINT,
arg0 VARCHAR(254),
arg1 VARCHAR(254),
arg2 VARCHAR(254),
arg3 VARCHAR(254),
caller_filename VARCHAR(254) NOT NULL,
caller_class VARCHAR(254) NOT NULL,
caller_method VARCHAR(254) NOT NULL,
caller_line CHAR(4) NOT NULL,
event_id BIGINT DEFAULT nextval('logging_event_id_seq') PRIMARY KEY
);
CREATE TABLE logging_event_property
(
event_id BIGINT NOT NULL,
mapped_key VARCHAR(254) NOT NULL,
mapped_value VARCHAR(1024),
PRIMARY KEY(event_id, mapped_key),
FOREIGN KEY (event_id) REFERENCES logging_event(event_id)
);
CREATE TABLE logging_event_exception
(
event_id BIGINT NOT NULL,
i SMALLINT NOT NULL,
trace_line VARCHAR(254) NOT NULL,
PRIMARY KEY(event_id, i),
FOREIGN KEY (event_id) REFERENCES logging_event(event_id)
);