Pelops - Catch Connection Error?
Is there a way to catch a connection error when using pelops in Java? I have the following code but for some reason, I'm not getting to my catch block.
public static Boolean testDBConnection() throws PelopsException {
try{
Cluster cluster = new Cluster("127.0.0.1", 9160);
Pelops.addPool(pool, cluster, keyspace);
Pelops.shutdown();
return true;
}
catch(PelopsException e)
{
System.out.println("SOMETHING WENT WRONG!");
System.ou开发者_Python百科t.println(e.getMessage());
return false;
}
}
This is probably something really easy, but I can't seem to get it to work. I see the exceptions coming through, but there is just no way I can catch this? Could someone please lead me in the right direction?
Thanks!
EDIT - Exception being returned in Eclipse Console...
15:47:33.545 [main] DEBUG o.s.c.pelops.pool.CommonsBackedPool - Made new connection 'Connection[Testing][127.0.0.1:9160][724408050]'
15:47:34.545 [main] ERROR o.scale7.cassandra.pelops.Connection - Failed to open transport. See cause for details...
org.apache.thrift.transport.TTransportException: java.net.ConnectException: Connection refused: connect
at org.apache.thrift.transport.TSocket.open(TSocket.java:185) ~[libthrift-0.5.0.jar:na]
at org.apache.thrift.transport.TFramedTransport.open(TFramedTransport.java:81) ~[libthrift-0.5.0.jar:na]
at org.scale7.cassandra.pelops.Connection.open(Connection.java:70) ~[scale7-pelops-0.913.jar:na]
at org.scale7.cassandra.pelops.pool.CommonsBackedPool$ConnectionFactory.makeObject(CommonsBackedPool.java:785) [scale7-pelops-0.913.jar:na]
at org.apache.commons.pool.impl.GenericKeyedObjectPool.addObject(GenericKeyedObjectPool.java:1685) [commons-pool-1.5.5.jar:1.5.5]
at org.apache.commons.pool.impl.GenericKeyedObjectPool.ensureMinIdle(GenericKeyedObjectPool.java:2058) [commons-pool-1.5.5.jar:1.5.5]
at org.apache.commons.pool.impl.GenericKeyedObjectPool.preparePool(GenericKeyedObjectPool.java:1722) [commons-pool-1.5.5.jar:1.5.5]
at org.scale7.cassandra.pelops.pool.CommonsBackedPool.addNode(CommonsBackedPool.java:373) [scale7-pelops-0.913.jar:na]
at org.scale7.cassandra.pelops.pool.CommonsBackedPool.<init>(CommonsBackedPool.java:104) [scale7-pelops-0.913.jar:na]
at org.scale7.cassandra.pelops.pool.CommonsBackedPool.<init>(CommonsBackedPool.java:64) [scale7-pelops-0.913.jar:na]
at org.scale7.cassandra.pelops.pool.CommonsBackedPool.<init>(CommonsBackedPool.java:52) [scale7-pelops-0.913.jar:na]
at org.scale7.cassandra.pelops.Pelops.addPool(Pelops.java:25) [scale7-pelops-0.913.jar:na]
at libraries.cassandra.testDBConnection(cassandra.java:192) [classes/:na]
at libraries.cassandra.main(cassandra.java:38) [classes/:na]
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.6.0_25]
at java.net.PlainSocketImpl.doConnect(Unknown Source) ~[na:1.6.0_25]
at java.net.PlainSocketImpl.connectToAddress(Unknown Source) ~[na:1.6.0_25]
at java.net.PlainSocketImpl.connect(Unknown Source) ~[na:1.6.0_25]
at java.net.SocksSocketImpl.connect(Unknown Source) ~[na:1.6.0_25]
at java.net.Socket.connect(Unknown Source) ~[na:1.6.0_25]
at org.apache.thrift.transport.TSocket.open(TSocket.java:180) ~[libthrift-0.5.0.jar:na]
... 13 common frames omitted
The exception being thrown org.apache.thrift.TTransportException is a checked exception that is not caught and wrapped by PelopsException which extends RuntimeException.
If you want your method to always return a PelopsException, you must catch(Exception e)
and then throw new PelopsException(e.getMessage()) inside your catch block.
catch(Exception e)
{
System.out.println("SOMETHING WENT WRONG!");
System.out.println(e.getMessage());
throw new PelopsException(e.getMessage());
}
It may be throwing an unchecked exception or an Error (which is not an Exception).
Try changing your code to catch (Throwable e)
and see what you get.
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