protected void pushConnection(PooledConnection conn) throws SQLException { // 关闭一个连接，其实是放回pool
synchronized (state) { // 加锁
state.activeConnections.remove(conn); // 从活动list移出
if (conn.isValid()) { // conn是有效的
if (state.idleConnections.size() < poolMaximumIdleConnections
&& conn.getConnectionTypeCode() == expectedConnectionTypeCode) {
state.accumulatedCheckoutTime += conn.getCheckoutTime();
if (!conn.getRealConnection().getAutoCommit()) { // 不是自动提交的话
conn.getRealConnection().rollback(); // 回滚
}
PooledConnection newConn =
new PooledConnection(conn.getRealConnection(), this); // 新建一个连接，用原来的真连接
state.idleConnections.add(newConn); // 加入空闲list
newConn.setCreatedTimestamp(conn.getCreatedTimestamp());
newConn.setLastUsedTimestamp(conn.getLastUsedTimestamp());
conn.invalidate(); // 老连接标记为无效
if (log.isDebugEnabled()) {
log.debug("Returned connection " + newConn.getRealHashCode() + " to pool.");
}
state.notifyAll(); // 唤醒popConnection中等待连接的线程可以来抢state的锁
} else {
state.accumulatedCheckoutTime += conn.getCheckoutTime();
if (!conn.getRealConnection().getAutoCommit()) {
conn.getRealConnection().rollback(); // 回滚
}
conn.getRealConnection().close(); // 关闭
if (log.isDebugEnabled()) {
log.debug("Closed connection " + conn.getRealHashCode() + ".");
}
conn.invalidate();
}
} else {
if (log.isDebugEnabled()) {
log.debug(
"A bad connection ("
+ conn.getRealHashCode()
+ ") attempted to return to the pool, discarding connection.");
}
state.badConnectionCount++;
}
}
}
protected void pushConnection(PooledConnection conn) throws SQLException {
synchronized (state) {
state.activeConnections.remove(conn);
if (conn.isValid()) {
if (state.idleConnections.size() < poolMaximumIdleConnections
&& conn.getConnectionTypeCode() == expectedConnectionTypeCode) {
state.accumulatedCheckoutTime += conn.getCheckoutTime();
if (!conn.getRealConnection().getAutoCommit()) {
conn.getRealConnection().rollback();
}
PooledConnection newConn = new PooledConnection(conn.getRealConnection(), this);
state.idleConnections.add(newConn);
newConn.setCreatedTimestamp(conn.getCreatedTimestamp());
newConn.setLastUsedTimestamp(conn.getLastUsedTimestamp());
conn.invalidate();
if (log.isDebugEnabled()) {
log.debug("Returned connection " + newConn.getRealHashCode() + " to pool.");
}
state.notifyAll();
} else {
state.accumulatedCheckoutTime += conn.getCheckoutTime();
if (!conn.getRealConnection().getAutoCommit()) {
conn.getRealConnection().rollback();
}
conn.getRealConnection().close();
if (log.isDebugEnabled()) {
log.debug("Closed connection " + conn.getRealHashCode() + ".");
}
conn.invalidate();
}
} else {
if (log.isDebugEnabled()) {
log.debug(
"A bad connection ("
+ conn.getRealHashCode()
+ ") attempted to return to the pool, discarding connection.");
}
state.badConnectionCount++;
}
}
}