/** 日志服务主方法 由日志服务线程调用 */
public void process(Collection<LogEvent> list) {
for (LogEvent e : list) {
/*
* 对每一个LogEvent检查是否被过滤
*/
if (checkFilter(e) == false) {
continue;
}
// 获取LogAppender并输出日志
LogAppender appender = repository.getLogAppender(e);
appender.append(e.getLogContent());
}
}
public int deleteAllExceptLastNRecords(final int recordsAmountToKeepAlive)
throws DataAccessException {
Integer logRecordsCountTotal = logRepository.countAll();
if (recordsAmountToKeepAlive >= logRecordsCountTotal) {
return 0;
}
final String temporaryTableNameNew =
tableName + "_" + UUID.randomUUID().toString().replace("-", "");
final String temporaryTableNameOld =
tableName + "_" + UUID.randomUUID().toString().replace("-", "");
sharedTransactionTemplate.execute(
new TransactionCallbackWithoutResult() {
@Override
protected void doInTransactionWithoutResult(TransactionStatus status) {
Integer limit = recordsAmountToKeepAlive;
String[] sql = {
"CREATE TABLE IF NOT EXISTS " + temporaryTableNameNew + " LIKE " + tableName,
"INSERT INTO "
+ temporaryTableNameNew
+ " SELECT * FROM "
+ tableName
+ " ORDER BY occurred_at DESC LIMIT "
+ limit,
"RENAME TABLE "
+ tableName
+ " TO "
+ temporaryTableNameOld
+ ", "
+ temporaryTableNameNew
+ " TO "
+ tableName,
"DROP TABLE " + temporaryTableNameOld
};
jdbcTemplate.batchUpdate(sql);
}
});
return logRecordsCountTotal - recordsAmountToKeepAlive;
}
