io.knotx.adapter.AbstractAdapterProxy.java Source code

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Here is the source code for io.knotx.adapter.AbstractAdapterProxy.java

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/*
 * Copyright (C) 2016 Cognifide Limited
 *
 * 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 io.knotx.adapter;

import io.knotx.dataobjects.AdapterRequest;
import io.knotx.dataobjects.AdapterResponse;
import io.knotx.dataobjects.ClientResponse;
import io.knotx.proxy.AdapterProxy;
import io.netty.handler.codec.http.HttpResponseStatus;
import io.vertx.core.AsyncResult;
import io.vertx.core.Future;
import io.vertx.core.Handler;
import io.vertx.core.buffer.Buffer;
import io.vertx.core.logging.Logger;
import io.vertx.core.logging.LoggerFactory;
import rx.Observable;

public abstract class AbstractAdapterProxy implements AdapterProxy {

    private static final Logger LOGGER = LoggerFactory.getLogger(AbstractAdapterProxy.class);

    protected abstract Observable<AdapterResponse> processRequest(AdapterRequest message);

    @Override
    public void process(AdapterRequest request, Handler<AsyncResult<AdapterResponse>> result) {
        processRequest(request).subscribe(adapterResponse -> result.handle(Future.succeededFuture(adapterResponse)),
                error -> {
                    LOGGER.error("Error happened during Adapter Request processing", error);
                    result.handle(Future.succeededFuture(getErrorResponse(error)));
                });
    }

    /**
     * Method generates error {@link AdapterResponse} in case of processing failure.
     *
     * @param error - error that occurred.
     * @return - error response (e.g. with 500 status code and other info).
     */
    protected AdapterResponse getErrorResponse(Throwable error) {
        return new AdapterResponse()
                .setResponse(new ClientResponse().setStatusCode(HttpResponseStatus.INTERNAL_SERVER_ERROR.code())
                        .setBody(Buffer.buffer(error.getMessage())));
    }
}