be.objectify.deadbolt.java.actions.DeferredDeadboltAction Maven / Gradle / Ivy
/*
* Copyright 2010-2016 Steve Chaloner
*
* 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 be.objectify.deadbolt.java.actions;
import be.objectify.deadbolt.java.ExecutionContextProvider;
import be.objectify.deadbolt.java.cache.HandlerCache;
import com.typesafe.config.Config;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import play.mvc.Http;
import play.mvc.Result;
import scala.concurrent.ExecutionContextExecutor;
import javax.inject.Inject;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionStage;
/**
* Executes a deferred method-level annotation. Ideally, the associated annotation would be placed
* above any other class-level Deadbolt annotations in order to still have things fire in the correct order.
*
* @author Steve Chaloner ([email protected])
*/
public class DeferredDeadboltAction extends AbstractDeadboltAction
{
private static final Logger LOGGER = LoggerFactory.getLogger(DeferredDeadboltAction.class);
@Inject
public DeferredDeadboltAction(final HandlerCache handlerCache,
final Config config,
final ExecutionContextProvider ecProvider)
{
super(handlerCache,
config,
ecProvider);
}
@Override
public CompletionStage execute(final Http.Context ctx) throws Exception
{
final ExecutionContextExecutor executor = executor();
final CompletableFuture eventualResult = CompletableFuture.supplyAsync(() -> getDeferredAction(ctx), executor)
.thenComposeAsync(deferredAction ->
{
final CompletionStage result;
if (deferredAction == null)
{
result = delegate.call(ctx);
}
else
{
LOGGER.debug("Executing deferred action [{}]",
deferredAction.getClass().getName());
result = deferredAction.call(ctx);
}
return result;
}, executor);
return maybeBlock(eventualResult);
}
}