TransportMultiTermVectorsAction.java

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 * the Apache License, Version 2.0 (the "License"); you may
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 *    http://www.apache.org/licenses/LICENSE-2.0
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package org.elasticsearch.action.termvectors;

import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.action.support.HandledTransportAction;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.block.ClusterBlockLevel;
import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.cluster.service.ClusterService;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.util.concurrent.AtomicArray;
import org.elasticsearch.index.IndexNotFoundException;
import org.elasticsearch.index.shard.ShardId;
import org.elasticsearch.transport.TransportService;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;

public class TransportMultiTermVectorsAction extends HandledTransportAction<MultiTermVectorsRequest, MultiTermVectorsResponse> {

    private final ClusterService clusterService;
    private final TransportShardMultiTermsVectorAction shardAction;
    private final IndexNameExpressionResolver indexNameExpressionResolver;

    @Inject
    public TransportMultiTermVectorsAction(Settings settings, TransportService transportService,
                                           ClusterService clusterService, TransportShardMultiTermsVectorAction shardAction,
                                           ActionFilters actionFilters, IndexNameExpressionResolver indexNameExpressionResolver) {
        super(settings, MultiTermVectorsAction.NAME, transportService, actionFilters, MultiTermVectorsRequest::new);
        this.clusterService = clusterService;
        this.shardAction = shardAction;
        this.indexNameExpressionResolver = indexNameExpressionResolver;
    }

    @Override
    protected void doExecute(final MultiTermVectorsRequest request, final ActionListener<MultiTermVectorsResponse> listener) {
        ClusterState clusterState = clusterService.state();

        clusterState.blocks().globalBlockedRaiseException(ClusterBlockLevel.READ);

        final AtomicArray<MultiTermVectorsItemResponse> responses = new AtomicArray<>(request.requests.size());

        Map<ShardId, MultiTermVectorsShardRequest> shardRequests = new HashMap<>();
        for (int i = 0; i < request.requests.size(); i++) {
            TermVectorsRequest termVectorsRequest = request.requests.get(i);
            termVectorsRequest.routing(clusterState.metaData().resolveIndexRouting(termVectorsRequest.routing(), termVectorsRequest.index(), false));
            if (!clusterState.metaData().hasConcreteIndex(termVectorsRequest.index())) {
                responses.set(i, new MultiTermVectorsItemResponse(null, new MultiTermVectorsResponse.Failure(termVectorsRequest.index(),
                        termVectorsRequest.type(), termVectorsRequest.id(), new IndexNotFoundException(termVectorsRequest.index()))));
                continue;
            }
            String concreteSingleIndex = indexNameExpressionResolver.concreteSingleIndex(clusterState, termVectorsRequest).getName();
            if (termVectorsRequest.routing() == null && clusterState.getMetaData().routingRequired(concreteSingleIndex, termVectorsRequest.type())) {
                responses.set(i, new MultiTermVectorsItemResponse(null, new MultiTermVectorsResponse.Failure(concreteSingleIndex, termVectorsRequest.type(), termVectorsRequest.id(),
                        new IllegalArgumentException("routing is required for [" + concreteSingleIndex + "]/[" + termVectorsRequest.type() + "]/[" + termVectorsRequest.id() + "]"))));
                continue;
            }
            ShardId shardId = clusterService.operationRouting().shardId(clusterState, concreteSingleIndex,
                    termVectorsRequest.id(), termVectorsRequest.routing());
            MultiTermVectorsShardRequest shardRequest = shardRequests.get(shardId);
            if (shardRequest == null) {
                shardRequest = new MultiTermVectorsShardRequest(shardId.getIndexName(), shardId.id());
                shardRequest.preference(request.preference);
                shardRequests.put(shardId, shardRequest);
            }
            shardRequest.add(i, termVectorsRequest);
        }

        if (shardRequests.size() == 0) {
            // only failures..
            listener.onResponse(new MultiTermVectorsResponse(responses.toArray(new MultiTermVectorsItemResponse[responses.length()])));
        }

        final AtomicInteger counter = new AtomicInteger(shardRequests.size());
        for (final MultiTermVectorsShardRequest shardRequest : shardRequests.values()) {
            shardAction.execute(shardRequest, new ActionListener<MultiTermVectorsShardResponse>() {
                @Override
                public void onResponse(MultiTermVectorsShardResponse response) {
                    for (int i = 0; i < response.locations.size(); i++) {
                        responses.set(response.locations.get(i), new MultiTermVectorsItemResponse(response.responses.get(i),
                                response.failures.get(i)));
                    }
                    if (counter.decrementAndGet() == 0) {
                        finishHim();
                    }
                }

                @Override
                public void onFailure(Exception e) {
                    // create failures for all relevant requests
                    for (int i = 0; i < shardRequest.locations.size(); i++) {
                        TermVectorsRequest termVectorsRequest = shardRequest.requests.get(i);
                        responses.set(shardRequest.locations.get(i), new MultiTermVectorsItemResponse(null,
                                new MultiTermVectorsResponse.Failure(shardRequest.index(), termVectorsRequest.type(),
                                        termVectorsRequest.id(), e)));
                    }
                    if (counter.decrementAndGet() == 0) {
                        finishHim();
                    }
                }

                private void finishHim() {
                    listener.onResponse(new MultiTermVectorsResponse(
                            responses.toArray(new MultiTermVectorsItemResponse[responses.length()])));
                }
            });
        }
    }
}