Revision 1849
Added by Jing Tao about 21 years ago
| src/edu/ucsb/nceas/metacat/DBConnectionPool.java | ||
|---|---|---|
| 49 | 49 |
private static DBConnectionPool instance; |
| 50 | 50 |
private static Vector connectionPool; |
| 51 | 51 |
private static Thread runner; |
| 52 |
private static int countOfReachMaximum = 0; |
|
| 52 | 53 |
|
| 53 | 54 |
//maximum connection number in the connection pool |
| 54 | 55 |
final static int MAXIMUMCONNECTIONNUMBER= |
| ... | ... | |
| 236 | 237 |
+db.getConnectionTime(), 65); |
| 237 | 238 |
//set check out time |
| 238 | 239 |
db.setCheckOutTime(System.currentTimeMillis()); |
| 239 |
//check it out |
|
| 240 |
// set count of reach maximum 0 because it can check out |
|
| 241 |
countOfReachMaximum =0; |
|
| 240 | 242 |
return db; |
| 241 | 243 |
}//if |
| 242 | 244 |
else//The DBConnection has some problem |
| ... | ... | |
| 290 | 292 |
" open db connections is reached." + |
| 291 | 293 |
" New db connection to MetaCat" + |
| 292 | 294 |
" cannot be established.", 1); |
| 293 |
return null; |
|
| 294 |
//if couldn't get a connection, sleep 20 seconds and try again. |
|
| 295 |
/*try |
|
| 295 |
countOfReachMaximum ++; |
|
| 296 |
if (countOfReachMaximum >= 10) |
|
| 296 | 297 |
{
|
| 297 |
System.out.println("sleep");
|
|
| 298 |
Thread.sleep(2000); |
|
| 298 |
countOfReachMaximum =0; |
|
| 299 |
MetaCatUtil.debugMessage("finally could not get dbconnection", 1);
|
|
| 300 |
return null; |
|
| 299 | 301 |
} |
| 300 |
catch (Exception e)
|
|
| 302 |
else
|
|
| 301 | 303 |
{
|
| 302 |
}*/ |
|
| 304 |
//if couldn't get a connection, sleep 20 seconds and try again. |
|
| 305 |
try |
|
| 306 |
{
|
|
| 307 |
MetaCatUtil.debugMessage("sleep for could not get dbconnection", 20);
|
|
| 308 |
Thread.sleep(5000); |
|
| 309 |
} |
|
| 310 |
catch (Exception e) |
|
| 311 |
{
|
|
| 312 |
} |
|
| 313 |
} |
|
| 303 | 314 |
|
| 304 | 315 |
|
| 305 | 316 |
}//else |
Also available in: Unified diff
If db pool size is maxium and no connection is free. The checkout will be wait.