retrofit.CallbackRunnable Maven / Gradle / Ivy
/*
* Copyright (C) 2012 Square, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package retrofit;
import java.util.concurrent.Executor;
/**
* A {@link Runnable} executed on a background thread to invoke {@link #obtainResponse()} which
* performs an HTTP request. The response of the request, whether it be an object or exception, is
* then marshaled to the supplied {@link Executor} in the form of a method call on a
* {@link Callback}.
*/
abstract class CallbackRunnable implements Runnable {
private final Callback callback;
private final Executor callbackExecutor;
CallbackRunnable(Callback callback, Executor callbackExecutor) {
this.callback = callback;
this.callbackExecutor = callbackExecutor;
}
@SuppressWarnings("unchecked")
@Override public final void run() {
try {
final ResponseWrapper wrapper = obtainResponse();
callbackExecutor.execute(new Runnable() {
@Override public void run() {
callback.success((T) wrapper.responseBody, wrapper.response);
}
});
} catch (final RetrofitError e) {
callbackExecutor.execute(new Runnable() {
@Override public void run() {
callback.failure(e);
}
});
}
}
public abstract ResponseWrapper obtainResponse();
}