public List getIdentityTables() {
// delete all the data in the jbpm tables
List jbpmTableNames = new ArrayList();
try {
createConnection();
ResultSet resultSet = connection.getMetaData().getTables("", "", null, null);
while (resultSet.next()) {
String tableName = resultSet.getString("TABLE_NAME");
if ((tableName != null)
&& (tableName.length() > 5)
&& (IDENTITY_TABLE_PREFIX.equalsIgnoreCase(tableName.substring(0, 5)))) {
jbpmTableNames.add(tableName);
}
}
} catch (SQLException e) {
throw new RuntimeException("couldn't get the jbpm table names");
} finally {
closeConnection();
}
return jbpmTableNames;
}
/**
* 初始化连接池
*
* @param props
* @param show_sql
*/
private static final void initDataSource(Properties dbProperties) {
try {
if (dbProperties == null) {
dbProperties = new Properties();
dbProperties.load(DBManager.class.getResourceAsStream(CONFIG_PATH));
}
// Class.forName(dbProperties.getProperty("jdbc.driverClass"));
for (Object key : dbProperties.keySet()) {
String skey = (String) key;
if (skey.startsWith("jdbc.")) {
String name = skey.substring(5);
cp_props.put(name, dbProperties.getProperty(skey));
if ("show_sql".equalsIgnoreCase(name)) {
show_sql = "true".equalsIgnoreCase(dbProperties.getProperty(skey));
}
}
}
dataSource = (DataSource) Class.forName(cp_props.getProperty("datasource")).newInstance();
if (dataSource.getClass().getName().indexOf("c3p0") > 0) {
// Disable JMX in C3P0
System.setProperty(
"com.mchange.v2.c3p0.management.ManagementCoordinator",
"com.mchange.v2.c3p0.management.NullManagementCoordinator");
}
log.info("Using DataSource : " + dataSource.getClass().getName());
BeanUtils.populate(dataSource, cp_props);
Connection conn = getConnection();
DatabaseMetaData mdm = conn.getMetaData();
log.info(
"Connected to " + mdm.getDatabaseProductName() + " " + mdm.getDatabaseProductVersion());
closeConnection();
} catch (Exception e) {
e.printStackTrace();
throw new DBException(e);
}
}
//
// Find all the methods for java.sql objects in the Connection which raise
// SQLFeatureNotSupportedException.
//
private void connectionWorkhorse(
Connection conn, HashSet<String> unsupportedList, HashSet<String> notUnderstoodList)
throws Exception {
vetSavepoint(conn, unsupportedList, notUnderstoodList);
vetLargeObjects(conn, unsupportedList, notUnderstoodList);
DatabaseMetaData dbmd = conn.getMetaData();
PreparedStatement ps = conn.prepareStatement("select * from sys.systables where tablename = ?");
ps.setString(1, "foo");
ParameterMetaData parameterMetaData = ps.getParameterMetaData();
ResultSet rs = ps.executeQuery();
ResultSetMetaData rsmd = rs.getMetaData();
Statement stmt = conn.createStatement();
CallableStatement cs = conn.prepareCall("CALL SYSCS_UTIL.SET_RUNTIMESTATISTICS(0)");
ParameterMetaData csmd = cs.getParameterMetaData();
//
// The vetObject() method calls all of the methods in these objects
// in a deterministic order, calling the close() method last.
// Inspect these objects in an order which respects the fact that
// the objects are closed as a result of calling vetObject().
//
vetObject(dbmd, unsupportedList, notUnderstoodList);
vetObject(stmt, unsupportedList, notUnderstoodList);
vetObject(csmd, unsupportedList, notUnderstoodList);
vetObject(cs, unsupportedList, notUnderstoodList);
vetObject(rsmd, unsupportedList, notUnderstoodList);
vetObject(rs, unsupportedList, notUnderstoodList);
vetObject(parameterMetaData, unsupportedList, notUnderstoodList);
vetObject(ps, unsupportedList, notUnderstoodList);
vetObject(conn, unsupportedList, notUnderstoodList);
// No need to close the objects. They were closed by vetObject().
}
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;
}
}
