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;
}
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;
}
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;
}