public abstract class AbstractPoolBackedDataSource extends PoolBackedDataSourceBase
implements PooledDataSource {
static final MLogger logger = MLog.getLogger(AbstractPoolBackedDataSource.class);
static final String NO_CPDS_ERR_MSG =
"Attempted to use an uninitialized PoolBackedDataSource. "
+ "Please call setConnectionPoolDataSource( ... ) to initialize.";
// MT: protected by this' lock
transient C3P0PooledConnectionPoolManager poolManager;
transient boolean is_closed = false;
// MT: end protected by this' lock
protected AbstractPoolBackedDataSource(boolean autoregister) {
super(autoregister);
setUpPropertyEvents();
}
protected AbstractPoolBackedDataSource(String configName) {
this(true);
initializeNamedConfig(configName);
}
private void setUpPropertyEvents() {
PropertyChangeListener l =
new PropertyChangeListener() {
public void propertyChange(PropertyChangeEvent evt) {
resetPoolManager();
}
};
this.addPropertyChangeListener(l);
}
protected void initializeNamedConfig(String configName) {
try {
if (configName != null) {
C3P0Config.bindNamedConfigToBean(this, configName);
if (this.getDataSourceName()
.equals(this.getIdentityToken())) // dataSourceName has not been specified in config
this.setDataSourceName(configName);
}
} catch (Exception e) {
if (logger.isLoggable(MLevel.WARNING))
logger.log(
MLevel.WARNING,
"Error binding PoolBackedDataSource to named-config '"
+ configName
+ "'. Some default-config values may be used.",
e);
}
}
// Commented out method is just super.getReference() with a lot of extra printing
// public javax.naming.Reference getReference() throws javax.naming.NamingException
// {
// System.err.println("getReference()!!!!");
// new Exception("PRINT-STACK-TRACE").printStackTrace();
// javax.naming.Reference out = super.getReference();
// System.err.println(out);
// return out;
// }
// report our ID token as dataSourceName if we have no
// name explicitly set
public String getDataSourceName() {
String out = super.getDataSourceName();
if (out == null) out = this.getIdentityToken();
return out;
}
// implementation of javax.sql.DataSource
public Connection getConnection() throws SQLException {
PooledConnection pc = getPoolManager().getPool().checkoutPooledConnection();
return pc.getConnection();
}
public Connection getConnection(String username, String password) throws SQLException {
PooledConnection pc = getPoolManager().getPool(username, password).checkoutPooledConnection();
return pc.getConnection();
}
public PrintWriter getLogWriter() throws SQLException {
return assertCpds().getLogWriter();
}
public void setLogWriter(PrintWriter out) throws SQLException {
assertCpds().setLogWriter(out);
}
public int getLoginTimeout() throws SQLException {
return assertCpds().getLoginTimeout();
}
public void setLoginTimeout(int seconds) throws SQLException {
assertCpds().setLoginTimeout(seconds);
}
// implementation of com.mchange.v2.c3p0.PoolingDataSource
public int getNumConnections() throws SQLException {
return getPoolManager().getPool().getNumConnections();
}
public int getNumIdleConnections() throws SQLException {
return getPoolManager().getPool().getNumIdleConnections();
}
public int getNumBusyConnections() throws SQLException {
return getPoolManager().getPool().getNumBusyConnections();
}
public int getNumUnclosedOrphanedConnections() throws SQLException {
return getPoolManager().getPool().getNumUnclosedOrphanedConnections();
}
public int getNumConnectionsDefaultUser() throws SQLException {
return getNumConnections();
}
public int getNumIdleConnectionsDefaultUser() throws SQLException {
return getNumIdleConnections();
}
public int getNumBusyConnectionsDefaultUser() throws SQLException {
return getNumBusyConnections();
}
public int getNumUnclosedOrphanedConnectionsDefaultUser() throws SQLException {
return getNumUnclosedOrphanedConnections();
}
public int getStatementCacheNumStatementsDefaultUser() throws SQLException {
return getPoolManager().getPool().getStatementCacheNumStatements();
}
public int getStatementCacheNumCheckedOutDefaultUser() throws SQLException {
return getPoolManager().getPool().getStatementCacheNumCheckedOut();
}
public int getStatementCacheNumConnectionsWithCachedStatementsDefaultUser() throws SQLException {
return getPoolManager().getPool().getStatementCacheNumConnectionsWithCachedStatements();
}
public float getEffectivePropertyCycleDefaultUser() throws SQLException {
return getPoolManager().getPool().getEffectivePropertyCycle();
}
public long getStartTimeMillisDefaultUser() throws SQLException {
return getPoolManager().getPool().getStartTime();
}
public long getUpTimeMillisDefaultUser() throws SQLException {
return getPoolManager().getPool().getUpTime();
}
public long getNumFailedCheckinsDefaultUser() throws SQLException {
return getPoolManager().getPool().getNumFailedCheckins();
}
public long getNumFailedCheckoutsDefaultUser() throws SQLException {
return getPoolManager().getPool().getNumFailedCheckouts();
}
public long getNumFailedIdleTestsDefaultUser() throws SQLException {
return getPoolManager().getPool().getNumFailedIdleTests();
}
public int getNumThreadsAwaitingCheckoutDefaultUser() throws SQLException {
return getPoolManager().getPool().getNumThreadsAwaitingCheckout();
}
public int getThreadPoolSize() throws SQLException {
return getPoolManager().getThreadPoolSize();
}
public int getThreadPoolNumActiveThreads() throws SQLException {
return getPoolManager().getThreadPoolNumActiveThreads();
}
public int getThreadPoolNumIdleThreads() throws SQLException {
return getPoolManager().getThreadPoolNumIdleThreads();
}
public int getThreadPoolNumTasksPending() throws SQLException {
return getPoolManager().getThreadPoolNumTasksPending();
}
public String sampleThreadPoolStackTraces() throws SQLException {
return getPoolManager().getThreadPoolStackTraces();
}
public String sampleThreadPoolStatus() throws SQLException {
return getPoolManager().getThreadPoolStatus();
}
public String sampleStatementCacheStatusDefaultUser() throws SQLException {
return getPoolManager().getPool().dumpStatementCacheStatus();
}
public String sampleStatementCacheStatus(String username, String password) throws SQLException {
return assertAuthPool(username, password).dumpStatementCacheStatus();
}
public Throwable getLastAcquisitionFailureDefaultUser() throws SQLException {
return getPoolManager().getPool().getLastAcquisitionFailure();
}
public Throwable getLastCheckinFailureDefaultUser() throws SQLException {
return getPoolManager().getPool().getLastCheckinFailure();
}
public Throwable getLastCheckoutFailureDefaultUser() throws SQLException {
return getPoolManager().getPool().getLastCheckoutFailure();
}
public Throwable getLastIdleTestFailureDefaultUser() throws SQLException {
return getPoolManager().getPool().getLastIdleTestFailure();
}
public Throwable getLastConnectionTestFailureDefaultUser() throws SQLException {
return getPoolManager().getPool().getLastConnectionTestFailure();
}
public Throwable getLastAcquisitionFailure(String username, String password) throws SQLException {
return assertAuthPool(username, password).getLastAcquisitionFailure();
}
public Throwable getLastCheckinFailure(String username, String password) throws SQLException {
return assertAuthPool(username, password).getLastCheckinFailure();
}
public Throwable getLastCheckoutFailure(String username, String password) throws SQLException {
return assertAuthPool(username, password).getLastCheckoutFailure();
}
public Throwable getLastIdleTestFailure(String username, String password) throws SQLException {
return assertAuthPool(username, password).getLastIdleTestFailure();
}
public Throwable getLastConnectionTestFailure(String username, String password)
throws SQLException {
return assertAuthPool(username, password).getLastConnectionTestFailure();
}
public int getNumThreadsAwaitingCheckout(String username, String password) throws SQLException {
return assertAuthPool(username, password).getNumThreadsAwaitingCheckout();
}
public String sampleLastAcquisitionFailureStackTraceDefaultUser() throws SQLException {
Throwable t = getLastAcquisitionFailureDefaultUser();
return t == null ? null : ThrowableUtils.extractStackTrace(t);
}
public String sampleLastCheckinFailureStackTraceDefaultUser() throws SQLException {
Throwable t = getLastCheckinFailureDefaultUser();
return t == null ? null : ThrowableUtils.extractStackTrace(t);
}
public String sampleLastCheckoutFailureStackTraceDefaultUser() throws SQLException {
Throwable t = getLastCheckoutFailureDefaultUser();
return t == null ? null : ThrowableUtils.extractStackTrace(t);
}
public String sampleLastIdleTestFailureStackTraceDefaultUser() throws SQLException {
Throwable t = getLastIdleTestFailureDefaultUser();
return t == null ? null : ThrowableUtils.extractStackTrace(t);
}
public String sampleLastConnectionTestFailureStackTraceDefaultUser() throws SQLException {
Throwable t = getLastConnectionTestFailureDefaultUser();
return t == null ? null : ThrowableUtils.extractStackTrace(t);
}
public String sampleLastAcquisitionFailureStackTrace(String username, String password)
throws SQLException {
Throwable t = getLastAcquisitionFailure(username, password);
return t == null ? null : ThrowableUtils.extractStackTrace(t);
}
public String sampleLastCheckinFailureStackTrace(String username, String password)
throws SQLException {
Throwable t = getLastCheckinFailure(username, password);
return t == null ? null : ThrowableUtils.extractStackTrace(t);
}
public String sampleLastCheckoutFailureStackTrace(String username, String password)
throws SQLException {
Throwable t = getLastCheckoutFailure(username, password);
return t == null ? null : ThrowableUtils.extractStackTrace(t);
}
public String sampleLastIdleTestFailureStackTrace(String username, String password)
throws SQLException {
Throwable t = getLastIdleTestFailure(username, password);
return t == null ? null : ThrowableUtils.extractStackTrace(t);
}
public String sampleLastConnectionTestFailureStackTrace(String username, String password)
throws SQLException {
Throwable t = getLastConnectionTestFailure(username, password);
return t == null ? null : ThrowableUtils.extractStackTrace(t);
}
public void softResetDefaultUser() throws SQLException {
getPoolManager().getPool().reset();
}
public int getNumConnections(String username, String password) throws SQLException {
return assertAuthPool(username, password).getNumConnections();
}
public int getNumIdleConnections(String username, String password) throws SQLException {
return assertAuthPool(username, password).getNumIdleConnections();
}
public int getNumBusyConnections(String username, String password) throws SQLException {
return assertAuthPool(username, password).getNumBusyConnections();
}
public int getNumUnclosedOrphanedConnections(String username, String password)
throws SQLException {
return assertAuthPool(username, password).getNumUnclosedOrphanedConnections();
}
public int getStatementCacheNumStatements(String username, String password) throws SQLException {
return assertAuthPool(username, password).getStatementCacheNumStatements();
}
public int getStatementCacheNumCheckedOut(String username, String password) throws SQLException {
return assertAuthPool(username, password).getStatementCacheNumCheckedOut();
}
public int getStatementCacheNumConnectionsWithCachedStatements(String username, String password)
throws SQLException {
return assertAuthPool(username, password).getStatementCacheNumConnectionsWithCachedStatements();
}
public float getEffectivePropertyCycle(String username, String password) throws SQLException {
return assertAuthPool(username, password).getEffectivePropertyCycle();
}
public long getStartTimeMillis(String username, String password) throws SQLException {
return assertAuthPool(username, password).getStartTime();
}
public long getUpTimeMillis(String username, String password) throws SQLException {
return assertAuthPool(username, password).getUpTime();
}
public long getNumFailedCheckins(String username, String password) throws SQLException {
return assertAuthPool(username, password).getNumFailedCheckins();
}
public long getNumFailedCheckouts(String username, String password) throws SQLException {
return assertAuthPool(username, password).getNumFailedCheckouts();
}
public long getNumFailedIdleTests(String username, String password) throws SQLException {
return assertAuthPool(username, password).getNumFailedIdleTests();
}
public void softReset(String username, String password) throws SQLException {
assertAuthPool(username, password).reset();
}
public int getNumBusyConnectionsAllUsers() throws SQLException {
return getPoolManager().getNumBusyConnectionsAllAuths();
}
public int getNumIdleConnectionsAllUsers() throws SQLException {
return getPoolManager().getNumIdleConnectionsAllAuths();
}
public int getNumConnectionsAllUsers() throws SQLException {
return getPoolManager().getNumConnectionsAllAuths();
}
public int getNumUnclosedOrphanedConnectionsAllUsers() throws SQLException {
return getPoolManager().getNumUnclosedOrphanedConnectionsAllAuths();
}
public int getStatementCacheNumStatementsAllUsers() throws SQLException {
return getPoolManager().getStatementCacheNumStatementsAllUsers();
}
public int getStatementCacheNumCheckedOutStatementsAllUsers() throws SQLException {
return getPoolManager().getStatementCacheNumCheckedOutStatementsAllUsers();
}
public synchronized int getStatementCacheNumConnectionsWithCachedStatementsAllUsers()
throws SQLException {
return getPoolManager().getStatementCacheNumConnectionsWithCachedStatementsAllUsers();
}
public void softResetAllUsers() throws SQLException {
getPoolManager().softResetAllAuths();
}
public int getNumUserPools() throws SQLException {
return getPoolManager().getNumManagedAuths();
}
public Collection getAllUsers() throws SQLException {
LinkedList out = new LinkedList();
Set auths = getPoolManager().getManagedAuths();
for (Iterator ii = auths.iterator(); ii.hasNext(); ) out.add(((DbAuth) ii.next()).getUser());
return Collections.unmodifiableList(out);
}
public synchronized void hardReset() {
resetPoolManager();
}
public synchronized void close() {
resetPoolManager();
is_closed = true;
C3P0Registry.markClosed(this);
if (Debug.DEBUG && Debug.TRACE == Debug.TRACE_MAX && logger.isLoggable(MLevel.FINEST)) {
logger.log(
MLevel.FINEST,
this.getClass().getName()
+ '@'
+ Integer.toHexString(System.identityHashCode(this))
+ " has been closed. ",
new Exception("DEBUG STACK TRACE for PoolBackedDataSource.close()."));
}
}
/**
* @deprecated the force_destroy argument is now meaningless, as pools are no longer potentially
* shared between multiple DataSources.
*/
public void close(boolean force_destroy) {
close();
}
// other code
public synchronized void
resetPoolManager() // used by other, wrapping datasources in package, and in mbean package
{
resetPoolManager(true);
}
public synchronized void resetPoolManager(
boolean
close_checked_out_connections) // used by other, wrapping datasources in package, and in
// mbean package
{
if (poolManager != null) {
poolManager.close(close_checked_out_connections);
poolManager = null;
}
}
private synchronized ConnectionPoolDataSource assertCpds() throws SQLException {
if (is_closed) throw new SQLException(this + " has been closed() -- you can no longer use it.");
ConnectionPoolDataSource out = this.getConnectionPoolDataSource();
if (out == null) throw new SQLException(NO_CPDS_ERR_MSG);
return out;
}
private synchronized C3P0PooledConnectionPoolManager getPoolManager() throws SQLException {
if (poolManager == null) {
ConnectionPoolDataSource cpds = assertCpds();
poolManager =
new C3P0PooledConnectionPoolManager(
cpds, null, null, this.getNumHelperThreads(), this.getIdentityToken());
if (logger.isLoggable(MLevel.INFO))
logger.info(
"Initializing c3p0 pool... "
+ this.toString() /* + "; using pool manager: " + poolManager */);
}
return poolManager;
}
private C3P0PooledConnectionPool assertAuthPool(String username, String password)
throws SQLException {
C3P0PooledConnectionPool authPool = getPoolManager().getPool(username, password, false);
if (authPool == null)
throw new SQLException(
"No pool has been yet been established for Connections authenticated by user '"
+ username
+ "' with the password provided. [Use getConnection( username, password ) "
+ "to initialize such a pool.]");
else return authPool;
}
// serialization stuff -- set up bound/constrained property event handlers on deserialization
private static final long serialVersionUID = 1;
private static final short VERSION = 0x0001;
private void writeObject(ObjectOutputStream oos) throws IOException {
oos.writeShort(VERSION);
}
private void readObject(ObjectInputStream ois) throws IOException, ClassNotFoundException {
short version = ois.readShort();
switch (version) {
case VERSION:
setUpPropertyEvents();
break;
default:
throw new IOException("Unsupported Serialized Version: " + version);
}
}
}
public final class C3P0PooledConnection extends AbstractC3P0PooledConnection {
static final MLogger logger = MLog.getLogger(C3P0PooledConnection.class);
static final Class[] PROXY_CTOR_ARGS = new Class[] {InvocationHandler.class};
static final Constructor CON_PROXY_CTOR;
static final Method RS_CLOSE_METHOD;
static final Method STMT_CLOSE_METHOD;
static final Object[] CLOSE_ARGS;
static final Set OBJECT_METHODS;
/** @deprecated use or rewrite in terms of ReflectUtils.findProxyConstructor() */
private static Constructor createProxyConstructor(Class intfc) throws NoSuchMethodException {
Class[] proxyInterfaces = new Class[] {intfc};
Class proxyCl =
Proxy.getProxyClass(C3P0PooledConnection.class.getClassLoader(), proxyInterfaces);
return proxyCl.getConstructor(PROXY_CTOR_ARGS);
}
static {
try {
CON_PROXY_CTOR = createProxyConstructor(ProxyConnection.class);
Class[] argClasses = new Class[0];
RS_CLOSE_METHOD = ResultSet.class.getMethod("close", argClasses);
STMT_CLOSE_METHOD = Statement.class.getMethod("close", argClasses);
CLOSE_ARGS = new Object[0];
OBJECT_METHODS =
Collections.unmodifiableSet(new HashSet(Arrays.asList(Object.class.getMethods())));
} catch (Exception e) {
// e.printStackTrace();
logger.log(
MLevel.SEVERE,
"An Exception occurred in static initializer of" + C3P0PooledConnection.class.getName(),
e);
throw new InternalError(
"Something is very wrong, or this is a pre 1.3 JVM."
+ "We cannot set up dynamic proxies and/or methods!");
}
}
// MT: post-constructor constants
final ConnectionTester connectionTester;
final boolean autoCommitOnClose;
final boolean forceIgnoreUnresolvedTransactions;
final boolean supports_setTypeMap;
final boolean supports_setHoldability;
final int dflt_txn_isolation;
final String dflt_catalog;
final int dflt_holdability;
// MT: thread-safe
final ConnectionEventSupport ces = new ConnectionEventSupport(this);
final StatementEventSupport ses = new StatementEventSupport(this);
// MT: threadsafe, but reassigned (on close)
volatile Connection physicalConnection;
volatile Exception invalidatingException = null;
// MT: threadsafe, but reassigned, and a read + reassignment must happen
// atomically. protected by this' lock.
ProxyConnection exposedProxy;
// MT: protected by this' lock
int connection_status = ConnectionTester.CONNECTION_IS_OKAY;
/*
* contains all unclosed Statements not managed by a StatementCache
* associated with the physical connection
*
* MT: protected by its own lock, not reassigned
*/
final Set uncachedActiveStatements = Collections.synchronizedSet(new HashSet());
// MT: Thread-safe, assigned
volatile GooGooStatementCache scache;
volatile boolean isolation_lvl_nondefault = false;
volatile boolean catalog_nondefault = false;
volatile boolean holdability_nondefault = false;
public C3P0PooledConnection(
Connection con,
ConnectionTester connectionTester,
boolean autoCommitOnClose,
boolean forceIgnoreUnresolvedTransactions,
ConnectionCustomizer cc,
String pdsIdt)
throws SQLException {
try {
if (cc != null) cc.onAcquire(con, pdsIdt);
} catch (Exception e) {
throw SqlUtils.toSQLException(e);
}
this.physicalConnection = con;
this.connectionTester = connectionTester;
this.autoCommitOnClose = autoCommitOnClose;
this.forceIgnoreUnresolvedTransactions = forceIgnoreUnresolvedTransactions;
this.supports_setTypeMap =
C3P0ImplUtils.supportsMethod(con, "setTypeMap", new Class[] {Map.class});
this.supports_setHoldability =
C3P0ImplUtils.supportsMethod(con, "setHoldability", new Class[] {int.class});
this.dflt_txn_isolation = con.getTransactionIsolation();
this.dflt_catalog = con.getCatalog();
this.dflt_holdability =
(supports_setHoldability ? con.getHoldability() : ResultSet.CLOSE_CURSORS_AT_COMMIT);
}
// used by C3P0PooledConnectionPool
Connection getPhysicalConnection() {
return physicalConnection;
}
boolean isClosed() throws SQLException {
return (physicalConnection == null);
}
void initStatementCache(GooGooStatementCache scache) {
this.scache = scache;
}
// DEBUG
// Exception origGet = null;
// synchronized to protect exposedProxy
public synchronized Connection getConnection() throws SQLException {
if (exposedProxy != null) {
// DEBUG
// System.err.println("[DOUBLE_GET_TESTER] -- double getting a Connection from " + this );
// new Exception("[DOUBLE_GET_TESTER] -- Double-Get Stack Trace").printStackTrace();
// origGet.printStackTrace();
// System.err.println("c3p0 -- Uh oh... getConnection() was called on a PooledConnection
// when " +
// "it had already provided a client with a Connection that has not yet been " +
// "closed. This probably indicates a bug in the connection pool!!!");
logger.warning(
"c3p0 -- Uh oh... getConnection() was called on a PooledConnection when "
+ "it had already provided a client with a Connection that has not yet been "
+ "closed. This probably indicates a bug in the connection pool!!!");
return exposedProxy;
} else {
return getCreateNewConnection();
}
}
// must be called from sync'ed method to protecte
// exposedProxy
private Connection getCreateNewConnection() throws SQLException {
try {
// DEBUG
// origGet = new Exception("[DOUBLE_GET_TESTER] -- Orig Get");
ensureOkay();
/*
* we reset the physical connection when we close an exposed proxy
* no need to do it again when we create one
*/
// reset();
return (exposedProxy = createProxyConnection());
} catch (SQLException e) {
throw e;
} catch (Exception e) {
// e.printStackTrace();
logger.log(MLevel.WARNING, "Failed to acquire connection!", e);
throw new SQLException("Failed to acquire connection!");
}
}
public void closeAll() throws SQLException {
if (scache != null) scache.closeAll(physicalConnection);
}
public void close() throws SQLException {
this.close(false);
}
synchronized void closeMaybeCheckedOut(boolean checked_out) throws SQLException {
if (checked_out) {
// reset transaction state
try {
C3P0ImplUtils.resetTxnState(
physicalConnection, forceIgnoreUnresolvedTransactions, autoCommitOnClose, false);
} catch (Exception e) {
if (logger.isLoggable(MLevel.FINER))
logger.log(
MLevel.FINER,
"Failed to reset the transaction state of "
+ physicalConnection
+ "just prior to close(). "
+ "Only relevant at all if this was a Connection being forced close()ed midtransaction.",
e);
}
}
close(false);
}
// 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;
}
}
}
public void addConnectionEventListener(ConnectionEventListener listener) {
ces.addConnectionEventListener(listener);
}
public void removeConnectionEventListener(ConnectionEventListener listener) {
ces.removeConnectionEventListener(listener);
}
public void addStatementEventListener(StatementEventListener sel) {
if (logger.isLoggable(MLevel.INFO))
logger.info(
"Per the JDBC4 spec, "
+ this.getClass().getName()
+ " accepts StatementListeners, but for now there is no circumstance under which they are notified!");
ses.addStatementEventListener(sel);
}
public void removeStatementEventListener(StatementEventListener sel) {
ses.removeStatementEventListener(sel);
}
private void reset() throws SQLException {
reset(false);
}
private void reset(boolean known_resolved_txn) throws SQLException {
ensureOkay();
C3P0ImplUtils.resetTxnState(
physicalConnection,
forceIgnoreUnresolvedTransactions,
autoCommitOnClose,
known_resolved_txn);
if (isolation_lvl_nondefault) {
physicalConnection.setTransactionIsolation(dflt_txn_isolation);
isolation_lvl_nondefault = false;
}
if (catalog_nondefault) {
physicalConnection.setCatalog(dflt_catalog);
catalog_nondefault = false;
}
if (holdability_nondefault) // we don't test if holdability is supported, 'cuz it can never go
// nondefault if it's not.
{
physicalConnection.setHoldability(dflt_holdability);
holdability_nondefault = false;
}
try {
physicalConnection.setReadOnly(false);
} catch (Throwable t) {
if (logger.isLoggable(MLevel.FINE))
logger.log(
MLevel.FINE,
"A Throwable occurred while trying to reset the readOnly property of our Connection to false!",
t);
}
try {
if (supports_setTypeMap) physicalConnection.setTypeMap(Collections.EMPTY_MAP);
} catch (Throwable t) {
if (logger.isLoggable(MLevel.FINE))
logger.log(
MLevel.FINE,
"A Throwable occurred while trying to reset the typeMap property of our Connection to Collections.EMPTY_MAP!",
t);
}
}
boolean closeAndRemoveResultSets(Set rsSet) {
boolean okay = true;
synchronized (rsSet) {
for (Iterator ii = rsSet.iterator(); ii.hasNext(); ) {
ResultSet rs = (ResultSet) ii.next();
try {
rs.close();
} catch (SQLException e) {
if (Debug.DEBUG)
logger.log(MLevel.WARNING, "An exception occurred while cleaning up a ResultSet.", e);
// e.printStackTrace();
okay = false;
} finally {
ii.remove();
}
}
}
return okay;
}
void ensureOkay() throws SQLException {
if (physicalConnection == null)
throw new SQLException(
invalidatingException == null
? "Connection is closed or broken."
: "Connection is broken. Invalidating Exception: "
+ invalidatingException.toString());
}
boolean closeAndRemoveResourcesInSet(Set s, Method closeMethod) {
boolean okay = true;
Set temp;
synchronized (s) {
temp = new HashSet(s);
}
for (Iterator ii = temp.iterator(); ii.hasNext(); ) {
Object rsrc = ii.next();
try {
closeMethod.invoke(rsrc, CLOSE_ARGS);
} catch (Exception e) {
Throwable t = e;
if (t instanceof InvocationTargetException)
t = ((InvocationTargetException) e).getTargetException();
logger.log(MLevel.WARNING, "An exception occurred while cleaning up a resource.", t);
// t.printStackTrace();
okay = false;
} finally {
s.remove(rsrc);
}
}
// We had to abandon the idea of simply iterating over s directly, because
// our resource close methods sometimes try to remove the resource from
// its parent Set. This is important (when the user closes the resources
// directly), but leads to ConcurrenModificationExceptions while we are
// iterating over the Set to close. So, now we iterate over a copy, but remove
// from the original Set. Since removal is idempotent, it don't matter if
// the close method already provoked a remove. Sucks that we have to copy
// the set though.
//
// Original (direct iteration) version:
//
// synchronized (s)
// {
// for (Iterator ii = s.iterator(); ii.hasNext(); )
// {
// Object rsrc = ii.next();
// try
// { closeMethod.invoke(rsrc, CLOSE_ARGS); }
// catch (Exception e)
// {
// Throwable t = e;
// if (t instanceof InvocationTargetException)
// t = ((InvocationTargetException) e).getTargetException();
// t.printStackTrace();
// okay = false;
// }
// finally
// { ii.remove(); }
// }
// }
return okay;
}
private SQLException cleanupUncachedActiveStatements() {
// System.err.println("IN uncachedActiveStatements.size(): " +
// uncachedActiveStatements.size());
boolean okay = closeAndRemoveResourcesInSet(uncachedActiveStatements, STMT_CLOSE_METHOD);
// System.err.println("OUT uncachedActiveStatements.size(): " +
// uncachedActiveStatements.size());
if (okay) return null;
else
return new SQLException(
"An exception occurred while trying to " + "clean up orphaned resources.");
}
ProxyConnection createProxyConnection() throws Exception {
// we should always have a separate handler for each proxy connection, so
// that object methods behave as expected... the handler covers
// all object methods on behalf of the proxy.
InvocationHandler handler = new ProxyConnectionInvocationHandler();
return (ProxyConnection) CON_PROXY_CTOR.newInstance(new Object[] {handler});
}
Statement createProxyStatement(Statement innerStmt) throws Exception {
return this.createProxyStatement(false, innerStmt);
}
private static class StatementProxyingSetManagedResultSet extends SetManagedResultSet {
private Statement proxyStatement;
StatementProxyingSetManagedResultSet(Set activeResultSets) {
super(activeResultSets);
}
public void setProxyStatement(Statement proxyStatement) {
this.proxyStatement = proxyStatement;
}
public Statement getStatement() throws SQLException {
return (proxyStatement == null ? super.getStatement() : proxyStatement);
}
}
/*
* TODO: factor all this convolution out into
* C3P0Statement
*/
Statement createProxyStatement( // final Method cachedStmtProducingMethod,
// final Object[] cachedStmtProducingMethodArgs,
final boolean inner_is_cached,
final Statement innerStmt)
throws Exception {
final Set activeResultSets = Collections.synchronizedSet(new HashSet());
final Connection parentConnection = exposedProxy;
if (Debug.DEBUG && parentConnection == null) {
// System.err.print("PROBABLE C3P0 BUG -- ");
// System.err.println(this + ": created a proxy Statement when there is no active, exposed
// proxy Connection???");
logger.warning(
"PROBABLE C3P0 BUG -- "
+ this
+ ": created a proxy Statement when there is no active, exposed proxy Connection???");
}
// we can use this one wrapper under all circumstances
// except jdbc3 CallableStatement multiple open ResultSets...
// avoid object allocation in statement methods where possible.
final StatementProxyingSetManagedResultSet mainResultSet =
new StatementProxyingSetManagedResultSet(activeResultSets);
class WrapperStatementHelper {
Statement wrapperStmt;
Statement nakedInner;
public WrapperStatementHelper(Statement wrapperStmt, Statement nakedInner) {
this.wrapperStmt = wrapperStmt;
this.nakedInner = nakedInner;
if (!inner_is_cached) uncachedActiveStatements.add(wrapperStmt);
}
private boolean closeAndRemoveActiveResultSets() {
return closeAndRemoveResultSets(activeResultSets);
}
public ResultSet wrap(ResultSet rs) {
if (mainResultSet.getInner() == null) {
mainResultSet.setInner(rs);
mainResultSet.setProxyStatement(wrapperStmt);
return mainResultSet;
} else {
// for the case of multiple open ResultSets
StatementProxyingSetManagedResultSet out =
new StatementProxyingSetManagedResultSet(activeResultSets);
out.setInner(rs);
out.setProxyStatement(wrapperStmt);
return out;
}
}
public void doClose() throws SQLException {
boolean okay = closeAndRemoveActiveResultSets();
if (inner_is_cached) // this statement was cached
scache.checkinStatement(innerStmt);
else {
innerStmt.close();
uncachedActiveStatements.remove(wrapperStmt);
}
if (!okay) throw new SQLException("Failed to close an orphaned ResultSet properly.");
}
public Object doRawStatementOperation(Method m, Object target, Object[] args)
throws IllegalAccessException, InvocationTargetException, SQLException {
if (target == C3P0ProxyStatement.RAW_STATEMENT) target = nakedInner;
for (int i = 0, len = args.length; i < len; ++i)
if (args[i] == C3P0ProxyStatement.RAW_STATEMENT) args[i] = nakedInner;
Object out = m.invoke(target, args);
if (out instanceof ResultSet) out = wrap((ResultSet) out);
return out;
}
}
if (innerStmt instanceof CallableStatement) {
class ProxyCallableStatement extends FilterCallableStatement implements C3P0ProxyStatement {
WrapperStatementHelper wsh;
ProxyCallableStatement(CallableStatement is) {
super(is);
this.wsh = new WrapperStatementHelper(this, is);
}
public Connection getConnection() {
return parentConnection;
}
public ResultSet getResultSet() throws SQLException {
return wsh.wrap(super.getResultSet());
}
public ResultSet getGeneratedKeys() throws SQLException {
return wsh.wrap(super.getGeneratedKeys());
}
public ResultSet executeQuery(String sql) throws SQLException {
return wsh.wrap(super.executeQuery(sql));
}
public ResultSet executeQuery() throws SQLException {
return wsh.wrap(super.executeQuery());
}
public Object rawStatementOperation(Method m, Object target, Object[] args)
throws IllegalAccessException, InvocationTargetException, SQLException {
return wsh.doRawStatementOperation(m, target, args);
}
public void close() throws SQLException {
wsh.doClose();
}
}
return new ProxyCallableStatement((CallableStatement) innerStmt);
} else if (innerStmt instanceof PreparedStatement) {
class ProxyPreparedStatement extends FilterPreparedStatement implements C3P0ProxyStatement {
WrapperStatementHelper wsh;
ProxyPreparedStatement(PreparedStatement ps) {
super(ps);
this.wsh = new WrapperStatementHelper(this, ps);
}
public Connection getConnection() {
return parentConnection;
}
public ResultSet getResultSet() throws SQLException {
return wsh.wrap(super.getResultSet());
}
public ResultSet getGeneratedKeys() throws SQLException {
return wsh.wrap(super.getGeneratedKeys());
}
public ResultSet executeQuery(String sql) throws SQLException {
return wsh.wrap(super.executeQuery(sql));
}
public ResultSet executeQuery() throws SQLException {
return wsh.wrap(super.executeQuery());
}
public Object rawStatementOperation(Method m, Object target, Object[] args)
throws IllegalAccessException, InvocationTargetException, SQLException {
return wsh.doRawStatementOperation(m, target, args);
}
public void close() throws SQLException {
wsh.doClose();
}
}
return new ProxyPreparedStatement((PreparedStatement) innerStmt);
} else {
class ProxyStatement extends FilterStatement implements C3P0ProxyStatement {
WrapperStatementHelper wsh;
ProxyStatement(Statement s) {
super(s);
this.wsh = new WrapperStatementHelper(this, s);
}
public Connection getConnection() {
return parentConnection;
}
public ResultSet getResultSet() throws SQLException {
return wsh.wrap(super.getResultSet());
}
public ResultSet getGeneratedKeys() throws SQLException {
return wsh.wrap(super.getGeneratedKeys());
}
public ResultSet executeQuery(String sql) throws SQLException {
return wsh.wrap(super.executeQuery(sql));
}
public Object rawStatementOperation(Method m, Object target, Object[] args)
throws IllegalAccessException, InvocationTargetException, SQLException {
return wsh.doRawStatementOperation(m, target, args);
}
public void close() throws SQLException {
wsh.doClose();
}
}
return new ProxyStatement(innerStmt);
}
}
final class ProxyConnectionInvocationHandler implements InvocationHandler {
// MT: ThreadSafe, but reassigned -- protected by this' lock
Connection activeConnection = physicalConnection;
DatabaseMetaData metaData = null;
boolean connection_error_signaled = false;
/*
* contains all unclosed ResultSets derived from this Connection's metadata
* associated with the physical connection
*
* MT: protected by this' lock
*/
final Set activeMetaDataResultSets = new HashSet();
// being careful with doRawConnectionOperation
// we initialize lazily, because this will be very rarely used
Set doRawResultSets = null;
boolean txn_known_resolved = true;
public String toString() {
return "C3P0ProxyConnection [Invocation Handler: " + super.toString() + ']';
}
private Object doRawConnectionOperation(Method m, Object target, Object[] args)
throws IllegalAccessException, InvocationTargetException, SQLException, Exception {
if (activeConnection == null)
throw new SQLException(
"Connection previously closed. You cannot operate on a closed Connection.");
if (target == C3P0ProxyConnection.RAW_CONNECTION) target = activeConnection;
for (int i = 0, len = args.length; i < len; ++i)
if (args[i] == C3P0ProxyConnection.RAW_CONNECTION) args[i] = activeConnection;
Object out = m.invoke(target, args);
// we never cache Statements generated by an operation on the raw Connection
if (out instanceof Statement) out = createProxyStatement(false, (Statement) out);
else if (out instanceof ResultSet) {
if (doRawResultSets == null) doRawResultSets = new HashSet();
out = new NullStatementSetManagedResultSet((ResultSet) out, doRawResultSets);
}
return out;
}
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;
}
}
private Exception doSilentClose(Object proxyConnection, boolean pooled_connection_is_dead) {
return doSilentClose(proxyConnection, pooled_connection_is_dead, false);
}
private Exception doSilentClose(
Object proxyConnection, boolean pooled_connection_is_dead, boolean known_resolved_txn) {
if (activeConnection != null) {
synchronized (
C3P0PooledConnection
.this) // uh oh... this is a nested lock acq... is there a deadlock hazard here?
{
if (C3P0PooledConnection.this.exposedProxy == proxyConnection) {
C3P0PooledConnection.this.exposedProxy = null;
// System.err.println("Reset exposed proxy.");
// DEBUG
// origGet = null;
} else // else case -- DEBUG only
logger.warning(
"(c3p0 issue) doSilentClose( ... ) called on a proxyConnection "
+ "other than the current exposed proxy for its PooledConnection. [exposedProxy: "
+ exposedProxy
+ ", proxyConnection: "
+ proxyConnection);
// System.err.println("[DEBUG] WARNING: doSilentClose( ... ) called on a
// proxyConnection " +
// "other than the current exposed proxy for its PooledConnection. [exposedProxy:
// " +
// exposedProxy + ", proxyConnection: " + proxyConnection);
}
Exception out = null;
Exception exc1 = null, exc2 = null, exc3 = null, exc4 = null;
try {
if (!pooled_connection_is_dead) C3P0PooledConnection.this.reset(known_resolved_txn);
} catch (Exception e) {
exc1 = e;
// if (Debug.DEBUG)
// {
// System.err.print("exc1 -- ");
// exc1.printStackTrace();
// }
}
exc2 = cleanupUncachedActiveStatements();
// if (Debug.DEBUG && exc2 != null)
// {
// System.err.print("exc2 -- ");
// exc2.printStackTrace();
// }
String errSource;
if (doRawResultSets != null) {
activeMetaDataResultSets.addAll(doRawResultSets);
errSource = "DataBaseMetaData or raw Connection operation";
} else errSource = "DataBaseMetaData";
if (!closeAndRemoveResultSets(activeMetaDataResultSets))
exc3 = new SQLException("Failed to close some " + errSource + " Result Sets.");
// if (Debug.DEBUG && exc3 != null)
// {
// System.err.print("exc3 -- ");
// exc3.printStackTrace();
// }
if (scache != null) {
try {
scache.checkinAll(physicalConnection);
} catch (Exception e) {
exc4 = e;
}
// if (Debug.DEBUG && exc4 != null)
// {
// System.err.print("exc4 -- ");
// exc4.printStackTrace();
// }
}
if (exc1 != null) {
handleMaybeFatalToPooledConnection(exc1, proxyConnection, true);
out = exc1;
} else if (exc2 != null) {
handleMaybeFatalToPooledConnection(exc2, proxyConnection, true);
out = exc2;
} else if (exc3 != null) {
handleMaybeFatalToPooledConnection(exc3, proxyConnection, true);
out = exc3;
} else if (exc4 != null) {
handleMaybeFatalToPooledConnection(exc4, proxyConnection, true);
out = exc4;
}
// if (out != null)
// {
// System.err.print("out -- ");
// out.printStackTrace();
// }
activeConnection = null;
return out;
} else return null;
}
private SQLException handleMaybeFatalToPooledConnection(
Throwable t, Object proxyConnection, boolean already_closed) {
// System.err.println("handleMaybeFatalToPooledConnection()");
SQLException sqle = SqlUtils.toSQLException(t);
int status = connectionTester.statusOnException(physicalConnection, sqle);
updateConnectionStatus(status);
if (status != ConnectionTester.CONNECTION_IS_OKAY) {
if (Debug.DEBUG) {
// System.err.print(C3P0PooledConnection.this + " will no longer be pooled because
// it has been " +
// "marked invalid by the following Exception: ");
// t.printStackTrace();
logger.log(
MLevel.INFO,
C3P0PooledConnection.this
+ " will no longer be pooled because it has been marked invalid by an Exception.",
t);
}
invalidatingException = sqle;
/*
------
A users have complained that SQLExceptions ought not close their Connections underneath
them under any circumstance. Signalling the Connection error after updating the Connection
status should be sufficient from the pool's perspective, because the PooledConnection
will be marked broken by the pool and will be destroyed on checkin. I think actually
close()ing the Connection when it appears to be broken rather than waiting for users
to close() it themselves is overly aggressive, so I'm commenting the old behavior out.
The only potential downside to this approach is that users who do not close() in a finally
clause properly might see their close()es skipped by exceptions that previously would
have led to automatic close(). But relying on the automatic close() was never reliable
(since it only ever happened when c3p0 determined a Connection to be absolutely broken),
and is generally speaking a client error that c3p0 ought not be responsible for dealing
with. I think it's right to leave this out. -- swaldman 2004-12-09
------
if (! already_closed )
doSilentClose( proxyConnection, true );
*/
if (!connection_error_signaled) {
ces.fireConnectionErrorOccurred(sqle);
connection_error_signaled = true;
}
}
return sqle;
}
}
interface ProxyConnection extends C3P0ProxyConnection {
void silentClose(boolean known_invalid) throws SQLException;
}
public synchronized int getConnectionStatus() {
return this.connection_status;
}
private synchronized void updateConnectionStatus(int status) {
switch (this.connection_status) {
case ConnectionTester.DATABASE_IS_INVALID:
// can't get worse than this, do nothing.
break;
case ConnectionTester.CONNECTION_IS_INVALID:
if (status == ConnectionTester.DATABASE_IS_INVALID) doBadUpdate(status);
break;
case ConnectionTester.CONNECTION_IS_OKAY:
if (status != ConnectionTester.CONNECTION_IS_OKAY) doBadUpdate(status);
break;
default:
throw new InternalError(this + " -- Illegal Connection Status: " + this.connection_status);
}
}
// must be called from sync'ed method
private void doBadUpdate(int new_status) {
this.connection_status = new_status;
try {
this.close(true);
} catch (SQLException e) {
// System.err.print("Broken Connection Close Error: ");
// e.printStackTrace();
logger.log(MLevel.WARNING, "Broken Connection Close Error. ", e);
}
}
}