org.elasticsearch.action.support.ChannelActionListener Maven / Gradle / Ivy

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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.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.message.ParameterizedMessage;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.transport.TransportChannel;
import org.elasticsearch.transport.TransportRequest;
import org.elasticsearch.transport.TransportResponse;

public final class ChannelActionListener<
    Response extends TransportResponse, Request extends TransportRequest> implements ActionListener {

    private static final Logger logger = LogManager.getLogger(ChannelActionListener.class);
    private final TransportChannel channel;
    private final Request request;
    private final String actionName;

    public ChannelActionListener(TransportChannel channel, String actionName, Request request) {
        this.channel = channel;
        this.request = request;
        this.actionName = actionName;
    }

    @Override
    public void onResponse(Response response) {
        try {
            channel.sendResponse(response);
        } catch (Exception e) {
            onFailure(e);
        }
    }

    @Override
    public void onFailure(Exception e) {
        try {
            channel.sendResponse(e);
        } catch (Exception e1) {
            e1.addSuppressed(e);
            logger.warn(() -> new ParameterizedMessage(
                "Failed to send error response for action [{}] and request [{}]", actionName, request), e1);
        }
    }
}