static void drop(DataSource ds) throws SQLException {
Connection con = null;
Statement stmt = null;
try {
con = ds.getConnection();
stmt = con.createStatement();
stmt.executeUpdate("DROP TABLE TRSS_TABLE");
} finally {
StatementUtils.attemptClose(stmt);
ConnectionUtils.attemptClose(con);
}
}
static void create(DataSource ds) throws SQLException {
Connection con = null;
Statement stmt = null;
try {
con = ds.getConnection();
stmt = con.createStatement();
stmt.executeUpdate("CREATE TABLE TRSS_TABLE ( a_col VARCHAR(16) )");
} finally {
StatementUtils.attemptClose(stmt);
ConnectionUtils.attemptClose(con);
}
}
static void doSomething(DataSource ds) throws SQLException {
Connection con = null;
Statement stmt = null;
try {
con = ds.getConnection();
stmt = con.createStatement();
int i =
stmt.executeUpdate(
"INSERT INTO TRSS_TABLE VALUES ('" + System.currentTimeMillis() + "')");
if (i != 1) throw new SQLException("Insert failed somehow strange!");
} finally {
StatementUtils.attemptClose(stmt);
ConnectionUtils.attemptClose(con);
}
}
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();
}
}
