public void rollback() {
final int initCount = session.getTargetCount();
lock.lock();
try {
reset(initCount);
} finally {
lock.unlock();
}
if (session.closed()) {
decrementCountToZero();
return;
}
// 执行
int started = 0;
for (final RouteResultsetNode node : session.getTargetKeys()) {
if (node == null) {
try {
LOGGER.error("null is contained in RoutResultsetNodes, source = " + session.getConInfo());
} catch (Exception e) {
}
continue;
}
final BackendConnection conn = session.getTarget(node);
if (conn != null) {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("rollback job run for " + conn);
}
if (clearIfSessionClosed(session)) {
return;
}
conn.setResponseHandler(RollbackNodeHandler.this);
conn.rollback();
++started;
}
}
if (started < initCount && decrementCountBy(initCount - started)) {
/**
* assumption: only caused by front-end connection close. <br>
* Otherwise, packet must be returned to front-end
*/
session.clearResources(true);
}
}
public void releaseConnection(RouteResultsetNode rrn, boolean debug, final boolean needRollback) {
BackendConnection c = target.remove(rrn);
if (c != null) {
if (debug) {
LOGGER.debug("release connection " + c);
}
if (c.getAttachment() != null) {
c.setAttachment(null);
}
if (!c.isClosed()) {
if (c.isAutocommit()) {
c.release();
} else if (needRollback) {
c.setResponseHandler(new RollbackReleaseHandler());
c.rollback();
} else {
c.release();
}
}
}
}