public static void main(String[] argv) {
try {
ComboPooledDataSource cpds = new ComboPooledDataSource();
cpds.setJdbcUrl(argv[0]);
cpds.setUser(argv[1]);
cpds.setPassword(argv[2]);
cpds.setMinPoolSize(5);
cpds.setAcquireIncrement(5);
cpds.setMaxPoolSize(20);
System.err.println("Initial...");
display(cpds);
Thread.sleep(2000);
HashSet hs = new HashSet();
for (int i = 0; i < 20; ++i) {
Connection c = cpds.getConnection();
hs.add(c);
System.err.println("Adding (" + (i + 1) + ") " + c);
display(cpds);
Thread.sleep(1000);
// if (i == 9)
// {
// //System.err.println("hardReset()ing");
// //cpds.hardReset();
// System.err.println("softReset()ing");
// cpds.softReset();
// }
}
int count = 0;
for (Iterator ii = hs.iterator(); ii.hasNext(); ) {
Connection c = ((Connection) ii.next());
System.err.println("Removing " + ++count);
ii.remove();
try {
c.getMetaData().getTables(null, null, "PROBABLYNOT", new String[] {"TABLE"});
} catch (Exception e) {
System.err.println(e);
System.err.println();
continue;
} finally {
c.close();
}
Thread.sleep(2000);
display(cpds);
}
System.err.println(
"Closing data source, \"forcing\" garbage collection, and sleeping for 5 seconds...");
cpds.close();
System.gc();
System.err.println("Main Thread: Sleeping for five seconds!");
Thread.sleep(5000);
// System.gc();
// Thread.sleep(5000);
System.err.println("Bye!");
} catch (Exception e) {
e.printStackTrace();
}
}
// TODO: factor out repetitive debugging code
private synchronized void close(boolean known_invalid) throws SQLException {
// System.err.println("Closing " + this);
if (physicalConnection != null) {
try {
StringBuffer debugOnlyLog = null;
if (Debug.DEBUG && known_invalid) {
debugOnlyLog = new StringBuffer();
debugOnlyLog.append("[ exceptions: ");
}
Exception exc = cleanupUncachedActiveStatements();
if (Debug.DEBUG && exc != null) {
if (known_invalid) debugOnlyLog.append(exc.toString() + ' ');
else
logger.log(
MLevel.WARNING,
"An exception occurred while cleaning up uncached active Statements.",
exc);
// exc.printStackTrace();
}
try {
// we've got to use silentClose() rather than close() here,
// 'cuz if there's still an exposedProxy (say a user forgot to
// close his Connection) before we close, and we use regular (loud)
// close, we will try to check this dead or dying PooledConnection
// back into the pool. We only want to do this when close is called
// on user proxies, and the underlying PooledConnection might still
// be good. The PooledConnection itself should only be closed by the
// pool.
if (exposedProxy != null) exposedProxy.silentClose(known_invalid);
} catch (Exception e) {
if (Debug.DEBUG) {
if (known_invalid) debugOnlyLog.append(e.toString() + ' ');
else logger.log(MLevel.WARNING, "An exception occurred.", exc);
// e.printStackTrace();
}
exc = e;
}
try {
this.closeAll();
} catch (Exception e) {
if (Debug.DEBUG) {
if (known_invalid) debugOnlyLog.append(e.toString() + ' ');
else logger.log(MLevel.WARNING, "An exception occurred.", exc);
// e.printStackTrace();
}
exc = e;
}
try {
physicalConnection.close();
} catch (Exception e) {
if (Debug.DEBUG) {
if (known_invalid) debugOnlyLog.append(e.toString() + ' ');
else logger.log(MLevel.WARNING, "An exception occurred.", exc);
e.printStackTrace();
}
exc = e;
}
if (exc != null) {
if (known_invalid) {
debugOnlyLog.append(" ]");
if (Debug.DEBUG) {
// System.err.print("[DEBUG]" + this + ": while closing a PooledConnection known
// to be invalid, ");
// System.err.println(" some exceptions occurred. This is probably not a
// problem:");
// System.err.println( debugOnlyLog.toString() );
logger.fine(
this
+ ": while closing a PooledConnection known to be invalid, "
+ " some exceptions occurred. This is probably not a problem: "
+ debugOnlyLog.toString());
}
} else
throw new SQLException(
"At least one error occurred while attempting "
+ "to close() the PooledConnection: "
+ exc);
}
if (Debug.TRACE == Debug.TRACE_MAX)
logger.fine("C3P0PooledConnection closed. [" + this + ']');
// System.err.println("C3P0PooledConnection closed. [" + this + ']');
} finally {
physicalConnection = null;
}
}
}
