io.crate.action.job.TransportJobAction.java Source code

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Here is the source code for io.crate.action.job.TransportJobAction.java

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/*
 * Licensed to CRATE Technology GmbH ("Crate") under one or more contributor
 * license agreements.  See the NOTICE file distributed with this work for
 * additional information regarding copyright ownership.  Crate 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.
 *
 * However, if you have executed another commercial license agreement
 * with Crate these terms will supersede the license and you may use the
 * software solely pursuant to the terms of the relevant commercial agreement.
 */

package io.crate.action.job;

import com.google.common.util.concurrent.FutureCallback;
import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListenableFuture;
import io.crate.core.collections.Bucket;
import io.crate.executor.transport.DefaultTransportResponseHandler;
import io.crate.executor.transport.NodeAction;
import io.crate.executor.transport.NodeActionRequestHandler;
import io.crate.executor.transport.Transports;
import io.crate.jobs.JobContextService;
import io.crate.jobs.JobExecutionContext;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.inject.Singleton;
import org.elasticsearch.indices.IndicesService;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;

import javax.annotation.Nonnull;
import java.util.List;

@Singleton
public class TransportJobAction implements NodeAction<JobRequest, JobResponse> {

    public static final String ACTION_NAME = "crate/sql/job";
    private static final String EXECUTOR = ThreadPool.Names.PERCOLATE;

    private final IndicesService indicesService;
    private final Transports transports;
    private final JobContextService jobContextService;
    private final ContextPreparer contextPreparer;

    @Inject
    public TransportJobAction(TransportService transportService, IndicesService indicesService,
            Transports transports, JobContextService jobContextService, ContextPreparer contextPreparer) {
        this.indicesService = indicesService;
        this.transports = transports;
        this.jobContextService = jobContextService;
        this.contextPreparer = contextPreparer;
        transportService.registerRequestHandler(ACTION_NAME, JobRequest.class, EXECUTOR,
                new NodeActionRequestHandler<JobRequest, JobResponse>(this) {
                });
    }

    public void execute(String node, final JobRequest request, final ActionListener<JobResponse> listener) {
        transports.sendRequest(ACTION_NAME, node, request, listener,
                new DefaultTransportResponseHandler<JobResponse>(listener) {
                    @Override
                    public JobResponse newInstance() {
                        return new JobResponse();
                    }
                });
    }

    @Override
    public void nodeOperation(final JobRequest request, final ActionListener<JobResponse> actionListener) {
        JobExecutionContext.Builder contextBuilder = jobContextService.newBuilder(request.jobId(),
                request.coordinatorNodeId());

        SharedShardContexts sharedShardContexts = new SharedShardContexts(indicesService);
        List<ListenableFuture<Bucket>> directResponseFutures = contextPreparer
                .prepareOnRemote(request.nodeOperations(), contextBuilder, sharedShardContexts);

        try {
            JobExecutionContext context = jobContextService.createContext(contextBuilder);
            context.start();
        } catch (Throwable t) {
            actionListener.onFailure(t);
            return;
        }

        if (directResponseFutures.size() == 0) {
            actionListener.onResponse(new JobResponse());
        } else {
            Futures.addCallback(Futures.allAsList(directResponseFutures), new FutureCallback<List<Bucket>>() {
                @Override
                public void onSuccess(List<Bucket> buckets) {
                    actionListener.onResponse(new JobResponse(buckets));
                }

                @Override
                public void onFailure(@Nonnull Throwable t) {
                    actionListener.onFailure(t);
                }
            });
        }
    }
}