[rabbitmq-discuss] How to close connection and channel when an exception occur

Fri Sep 27 15:24:07 BST 2013

Okay.  Here's my code:

ConnectionFactory factory = new ConnectionFactory();
factory.setUri("amqp://guest:guest@host:5672");
Connection conn = factory.newConnection();
Channel channel = conn.createChannel();

Got compiling error:

unreported exception java.net.URISyntaxException; must be caught or 
declared to be thrown
factory.setUri("");
                              ^
unreported exception java.io.IOException; must be caught or declared to be 
thrown
Connection conn = factory.newConnection();
                                                       ^
unreported exception java.io.IOException; must be caught or declared to be 
thrown
Channel channel = conn.createChannel();

On Friday, September 27, 2013 10:13:24 AM UTC-4, Phil wrote:
>
> Thank you everyone and you guys are absolutely correct.  I thought I had 
> to declare the connection and channel inside the try block because 
> exception need to be thrown or caught. 
>
> Sent from mobile device with autocorrect. 
>
> Phil 
>
> > On Sep 27, 2013, at 9:40 AM, Tim Watson <tim at rabbitmq.com> wrote: 
> > 
> > Phil, 
> > 
> >> On 27 Sep 2013, at 14:31, Phil wrote: 
> >> I'm a newbie on RabbitMQ.  I'm writing a java service to consume a 
> message from the queue.  Everything is working as designed but I cannot 
> seem to code "channel.close() or conn.close()" in the catch  or finally 
> block.  Java is complaining about that the "cannot find symbol". 
> >> 
> >> symbol  : variable channel 
> >> location: class RouteToMercury.javaServices 
> >>            channel.close(); 
> > 
> > It's impossible to help with a compiler error if you don't post that 
> code that you're trying to compile. 
> > 
> >> Can I close the connection and channel if an exception occur? 
> > 
> > Yes, absolutely. The above looks like a scoping issue. I suspect you've 
> done something like... 
> > 
> > try { 
> >  final Channel channel = connection.createChannel(); 
> >  doSomeWork(channel); 
> > } finally { 
> >  channel.close(); 
> > } 
> > 
> > Am I right? If so, you need to move the channel variable to the outer 
> scope. 
> > 
> > Cheers, 
> > Tim 
> > _______________________________________________ 
> > rabbitmq-discuss mailing list 
> > rabbitmq-discuss at lists.rabbitmq.com 
> > https://lists.rabbitmq.com/cgi-bin/mailman/listinfo/rabbitmq-discuss 
>
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