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/*
* Copyright (c) 2015 Uber Technologies, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.uber.tchannel.basic;
import com.uber.tchannel.api.ResponseCode;
import com.uber.tchannel.api.SubChannel;
import com.uber.tchannel.api.TChannel;
import com.uber.tchannel.api.TFuture;
import com.uber.tchannel.api.handlers.RawRequestHandler;
import com.uber.tchannel.api.handlers.TFutureCallback;
import com.uber.tchannel.messages.RawRequest;
import com.uber.tchannel.messages.RawResponse;
import java.net.InetAddress;
import java.util.concurrent.CountDownLatch;
public class AsyncRequest {
public static void main(String[] args) throws Exception {
TChannel server = createServer();
TChannel client = createClient();
SubChannel subChannel = client.makeSubChannel("server");
final long start = System.currentTimeMillis();
final CountDownLatch done = new CountDownLatch(3);
TFutureCallback callback = new TFutureCallback() {
@Override
public void onResponse(RawResponse response) {
// when using callback, resource associated with response is released by the the TChannel library
if (!response.isError()) {
System.out.println(String.format("Response received: response code: %s, header: %s, body: %s",
response.getResponseCode(),
response.getHeader(),
response.getBody()));
} else {
System.out.println(String.format("Got error response: %s",
response.toString()));
}
done.countDown();
}
};
// send three requests
for (int i = 0; i < 3; i++) {
RawRequest request = new RawRequest.Builder("server", "pong")
.setHeader("Marco")
.setBody("Ping!")
.build();
TFuture future = subChannel.send(request,
InetAddress.getByName("127.0.0.1"),
8888
);
future.addCallback(callback);
}
done.await();
System.out.println(String.format("\nTime cost: %dms", System.currentTimeMillis() - start));
// close channels asynchronously
server.shutdown(false);
client.shutdown(false);
}
protected static TChannel createServer() throws Exception {
// create TChannel
TChannel tchannel = new TChannel.Builder("server")
.setServerHost(InetAddress.getByName("127.0.0.1"))
.setServerPort(8888)
.build();
// create sub channel to register the service and endpoint handler
tchannel.makeSubChannel("server")
.register("pong", new RawRequestHandler() {
private int count = 0;
@Override
public RawResponse handleImpl(RawRequest request) {
System.out.println(String.format("Request received: header: %s, body: %s",
request.getHeader(),
request.getBody()));
count++;
if (count == 1) {
return new RawResponse.Builder(request)
.setTransportHeaders(request.getTransportHeaders())
.setHeader("Polo")
.setBody("Pong!")
.build();
} else if (count == 2) {
return new RawResponse.Builder(request)
.setTransportHeaders(request.getTransportHeaders())
.setResponseCode(ResponseCode.Error)
.setHeader("Polo")
.setBody("I feel bad ...")
.build();
} else {
throw new UnsupportedOperationException("I feel very bad!");
}
}
});
tchannel.listen();
return tchannel;
}
protected static TChannel createClient() throws Exception {
// create TChannel
TChannel tchannel = new TChannel.Builder("client")
.build();
// create sub channel to talk to server
tchannel.makeSubChannel("server");
return tchannel;
}
}
