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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you 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 org.elasticsearch.action.support;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.ActionRequest;
import org.elasticsearch.action.ActionResponse;
import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.tasks.Task;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportChannel;
import org.elasticsearch.transport.TransportRequestHandler;
import org.elasticsearch.transport.TransportService;
import java.util.function.Supplier;
/**
* A TransportAction that self registers a handler into the transport service
*/
public abstract class HandledTransportAction<Request extends ActionRequest<Request>, Response extends ActionResponse>
extends TransportAction<Request, Response> {
protected HandledTransportAction(Settings settings, String actionName, ThreadPool threadPool, TransportService transportService, ActionFilters actionFilters, IndexNameExpressionResolver indexNameExpressionResolver, Supplier<Request> request) {
super(settings, actionName, threadPool, actionFilters, indexNameExpressionResolver, transportService.getTaskManager());
transportService.registerRequestHandler(actionName, request, ThreadPool.Names.SAME, new TransportHandler());
}
class TransportHandler implements TransportRequestHandler<Request> {
@Override
public final void messageReceived(final Request request, final TransportChannel channel, Task task) throws Exception {
messageReceived(request, channel);
}
@Override
public final void messageReceived(Request request, TransportChannel channel) throws Exception {
execute(request, new ActionListener<Response>() {
@Override
public void onResponse(Response response) {
try {
channel.sendResponse(response);
} catch (Throwable e) {
onFailure(e);
}
}
@Override
public void onFailure(Throwable e) {
try {
channel.sendResponse(e);
} catch (Exception e1) {
logger.warn("Failed to send error response for action [{}] and request [{}]", e1,
actionName, request);
}
}
});
}
}
}
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