com.uber.tchannel.api.handlers.ThriftAsyncRequestHandler Maven / Gradle / Ivy
/*
* Copyright (c) 2016 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.api.handlers;
import com.google.common.util.concurrent.ListenableFuture;
import com.uber.tchannel.messages.Request;
import com.uber.tchannel.messages.Response;
import com.uber.tchannel.messages.ThriftRequest;
import com.uber.tchannel.messages.ThriftResponse;
import java.util.concurrent.ExecutionException;
/**
* Specialized async handler for thrift calls. Like the AsyncRequestHandler it also allows requests
* to be handle asynchronously by letting the actual handler return a future.
*/
public abstract class ThriftAsyncRequestHandler implements AsyncRequestHandler {
@Override
public Response handle(Request request) {
try {
return this.handleAsync(request).get();
} catch (InterruptedException | ExecutionException ex) {
// Cannot do much better with this exception so propogate the exception.
throw new RuntimeException(ex);
}
}
@Override
@SuppressWarnings("unchecked")
public ListenableFuture handleAsync(Request request) {
return handleImpl((ThriftRequest)request);
}
/**
* Main handle method for ThriftAsyncRequestHandler that return a ListenableFuture scoped down
* to ThriftResponse. This method should not make any blocking calls so that the calling thread
* is reliquished quickly.
*
* @param request ThriftRequest to handle
* @return A ListenableFuture representing the result of thrift request handling.
*/
public abstract ListenableFuture> handleImpl(ThriftRequest request);
}