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();
}
}
public synchronized Object invoke(Object proxy, Method m, Object[] args) throws Throwable {
if (OBJECT_METHODS.contains(m)) return m.invoke(this, args);
try {
String mname = m.getName();
if (activeConnection != null) {
if (mname.equals("rawConnectionOperation")) {
ensureOkay();
txn_known_resolved = false;
return doRawConnectionOperation((Method) args[0], args[1], (Object[]) args[2]);
} else if (mname.equals("setTransactionIsolation")) {
ensureOkay();
// don't modify txn_known_resolved
m.invoke(activeConnection, args);
int lvl = ((Integer) args[0]).intValue();
isolation_lvl_nondefault = (lvl != dflt_txn_isolation);
// System.err.println("updated txn isolation to " + lvl + ", nondefault level? " +
// isolation_lvl_nondefault);
return null;
} else if (mname.equals("setCatalog")) {
ensureOkay();
// don't modify txn_known_resolved
m.invoke(activeConnection, args);
String catalog = (String) args[0];
catalog_nondefault = ObjectUtils.eqOrBothNull(catalog, dflt_catalog);
return null;
} else if (mname.equals("setHoldability")) {
ensureOkay();
// don't modify txn_known_resolved
m.invoke(
activeConnection,
args); // will throw an exception if setHoldability() not supported...
int holdability = ((Integer) args[0]).intValue();
holdability_nondefault = (holdability != dflt_holdability);
return null;
} else if (mname.equals("createStatement")) {
ensureOkay();
txn_known_resolved = false;
Object stmt = m.invoke(activeConnection, args);
return createProxyStatement((Statement) stmt);
} else if (mname.equals("prepareStatement")) {
ensureOkay();
txn_known_resolved = false;
Object pstmt;
if (scache == null) {
pstmt = m.invoke(activeConnection, args);
return createProxyStatement((Statement) pstmt);
} else {
pstmt = scache.checkoutStatement(physicalConnection, m, args);
return createProxyStatement(true, (Statement) pstmt);
}
} else if (mname.equals("prepareCall")) {
ensureOkay();
txn_known_resolved = false;
Object cstmt;
if (scache == null) {
cstmt = m.invoke(activeConnection, args);
return createProxyStatement((Statement) cstmt);
} else {
cstmt = scache.checkoutStatement(physicalConnection, m, args);
return createProxyStatement(true, (Statement) cstmt);
}
} else if (mname.equals("getMetaData")) {
ensureOkay();
txn_known_resolved = false; // views of tables etc. might be txn dependent
DatabaseMetaData innerMd = activeConnection.getMetaData();
if (metaData == null) {
// exposedProxy is protected by C3P0PooledConnection.this' lock
synchronized (C3P0PooledConnection.this) {
metaData =
new SetManagedDatabaseMetaData(innerMd, activeMetaDataResultSets, exposedProxy);
}
}
return metaData;
} else if (mname.equals("silentClose")) {
// the PooledConnection doesn't have to be okay
doSilentClose(proxy, ((Boolean) args[0]).booleanValue(), this.txn_known_resolved);
return null;
} else if (mname.equals("close")) {
// the PooledConnection doesn't have to be okay
Exception e = doSilentClose(proxy, false, this.txn_known_resolved);
if (!connection_error_signaled) ces.fireConnectionClosed();
// System.err.println("close() called on a ProxyConnection.");
if (e != null) {
// System.err.print("user close exception -- ");
// e.printStackTrace();
throw e;
} else return null;
}
// else if ( mname.equals("finalize") ) //REMOVE THIS CASE -- TMP DEBUG
// {
// System.err.println("Connection apparently finalized!");
// return m.invoke( activeConnection, args );
// }
else {
ensureOkay();
// we've disabled setting txn_known_resolved to true, ever, because
// we failed to deal with the case that clients would work with previously
// acquired Statements and ResultSets after a commit(), rollback(), or setAutoCommit().
// the new non-reflective proxies have been modified to deal with this case.
// here, with soon-to-be-deprecated in "traditional reflective proxies mode"
// we are reverting to the conservative, always-presume-you-have-to-rollback
// policy.
// txn_known_resolved = ( mname.equals("commit") || mname.equals( "rollback" ) ||
// mname.equals( "setAutoCommit" ) );
txn_known_resolved = false;
return m.invoke(activeConnection, args);
}
} else {
if (mname.equals("close") || mname.equals("silentClose")) return null;
else if (mname.equals("isClosed")) return Boolean.TRUE;
else {
throw new SQLException("You can't operate on " + "a closed connection!!!");
}
}
} catch (InvocationTargetException e) {
Throwable convertMe = e.getTargetException();
SQLException sqle = handleMaybeFatalToPooledConnection(convertMe, proxy, false);
sqle.fillInStackTrace();
throw sqle;
}
}