>我无法处理JDBCClient中连接失败的情况,例如:没有要路由的主机,连接超时等。因为方法 .getConnection(( 不是返回失败的未来,但它在监视器中显示原因,然后它将静音。我认为它应该在连接超时或其他原因时发送失败的未来,而不是打印错误日志。
我的示例代码是。
JDBCClient client = ...;
client.getConnection(conn -> {
if (conn.succeeded()) {
....
} else {
// This is never executed (connection time out and etc.)
handler.handle(Future.failedFuture(conn.cause()));
}
});
我在日志中收到此错误:
An attempt by a client to checkout a Connection has timed out.
java.sql.SQLException: An attempt by a client to checkout a Connection has timed out.
at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:118)
at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:77)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:690)
at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:140)
at JDBCClient.lambda$getConnection$1(JDBCClient.java:132)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) ~[?:1.8.0_144]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) ~[?:1.8.0_144]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_144]
Caused by: com.mchange.v2.resourcepool.TimeoutException: A client timed out while waiting to acquire a resource from com.mchange.v2.resourcepool.BasicResourcePool@16404129 -- timeout at awaitAvailable()
at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1467)
at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:644)
at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:554)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutAndMarkConnectionInUse(C3P0PooledConnectionPool.java:758)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:685)
... 5 more
有人可以帮助我。
谢谢。
你可以尝试做这样的东西:
public Future<SQLConnection> tryConnect() {
JDBCClient client = JDBCClient.createNonShared(vertx, config());
Future<SQLConnection> future = Future.future();
client.getConnection(it -> {
if (it.succeeded()) {
future.complete(it.result());
} else {
future.fail(it.cause());
}
});
return future;
}
只需手动创建 future,然后在回调中解决或拒绝它。这实际上是这种情况的常见方法。