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Re: Async Client Not WorkingMike Machado 2012-12-22, 00:56
> Can you please provide complete code for a test that fails? Thanks!
Here is a single class that builds upon one of the common avro examples out there on the web, showing that async is not working:
package com.example.avrotest1;
import java.io.IOException;
import java.net.InetSocketAddress;
import org.apache.avro.ipc.specific.SpecificRequestor;
import org.apache.avro.ipc.specific.SpecificResponder;
import org.apache.avro.util.Utf8;
import example.proto.Mail;
import example.proto.Message;
import org.apache.avro.ipc.Callback;
import org.apache.avro.ipc.NettyServer;
import org.apache.avro.ipc.NettyTransceiver;
import org.apache.avro.ipc.Server;
/**
* Start a server, attach a client, and send a message.
*/
public class ExampleProto {
public static class MailImpl implements Mail {
// in this simple example just return details of the message
public Utf8 send(Message message) {
System.out.println("Sending message");
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return new Utf8("Sending message to " + message.getTo().toString()
+ " from " + message.getFrom().toString()
+ " with body " + message.getBody().toString());
}
}
private static Server server;
private static void startServer() throws IOException {
server = new NettyServer(new SpecificResponder(Mail.class, new MailImpl()), new InetSocketAddress(65111));
// the server implements the Mail protocol (MailImpl)
}
public static void main(String[] args) throws IOException {
if (args.length != 3) {
System.out.println("Usage: <to> <from> <body>");
System.exit(1);
}
System.out.println("Starting server");
// usually this would be another app, but for simplicity
startServer();
System.out.println("Server started");
NettyTransceiver client = new NettyTransceiver(new InetSocketAddress(65111));
// client code - attach to the server and send a message
Mail.Callback proxy = SpecificRequestor.getClient(Mail.Callback.class, client);
System.out.println("Client built, got proxy");
// fill in the Message record and send it
Message message = new Message();
message.setTo(new Utf8(args[0]));
message.setFrom(new Utf8(args[1]));
message.setBody(new Utf8(args[2]));
System.out.println("Calling proxy.send with message: " + message.toString());
proxy.send(message, new Callback<CharSequence>() {
@Override
public void handleError(Throwable arg0) {
System.out.println("Error: " + arg0.getMessage());
}
@Override
public void handleResult(CharSequence arg0) {
System.out.println("Got async result " + arg0);
}
});
System.out.println("Should see this log before Closure 'Got async result' message - but do not.");
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// cleanup
client.close();
server.close();
}
}
Schema:
{"namespace": "example.proto",
"protocol": "Mail",
"types": [
{"name": "Message", "type": "record",
"fields": [
{"name": "to", "type": "string"},
{"name": "from", "type": "string"},
{"name": "body", "type": "string"}
]
}
],
"messages": {
"send": {
"request": [{"name": "message", "type": "Message"}],
"response": "string"
}
}
}
Output:
Starting server
Server started
Client built, got proxy
Calling proxy.send with message: {"to": "some_user", "from": "joe", "body": "Hello_World"}
Sending message
Got async result Sending message to some_user from joe with body Hello_World
Should see this log before Closure 'Got async result' message - but do not.
So clearly, proxy.send() is not acting asynchronous otherwise we would see the "Should see…" log before the "Got async…" log.
