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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.ingest;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.ActionRequest;
import org.elasticsearch.action.ActionResponse;
import org.elasticsearch.action.bulk.BulkAction;
import org.elasticsearch.action.bulk.BulkItemResponse;
import org.elasticsearch.action.bulk.BulkRequest;
import org.elasticsearch.action.bulk.BulkResponse;
import org.elasticsearch.action.index.IndexAction;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.support.ActionFilter;
import org.elasticsearch.action.support.ActionFilterChain;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.component.AbstractComponent;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.ingest.PipelineExecutionService;
import org.elasticsearch.node.service.NodeService;
import org.elasticsearch.tasks.Task;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
public final class IngestActionFilter extends AbstractComponent implements ActionFilter {
private final PipelineExecutionService executionService;
@Inject
public IngestActionFilter(Settings settings, NodeService nodeService) {
super(settings);
this.executionService = nodeService.getIngestService().getPipelineExecutionService();
}
@Override
public <Request extends ActionRequest<Request>, Response extends ActionResponse> void apply(Task task, String action, Request request, ActionListener<Response> listener, ActionFilterChain<Request, Response> chain) {
switch (action) {
case IndexAction.NAME:
IndexRequest indexRequest = (IndexRequest) request;
if (Strings.hasText(indexRequest.getPipeline())) {
processIndexRequest(task, action, listener, chain, (IndexRequest) request);
} else {
chain.proceed(task, action, request, listener);
}
break;
case BulkAction.NAME:
BulkRequest bulkRequest = (BulkRequest) request;
if (bulkRequest.hasIndexRequestsWithPipelines()) {
@SuppressWarnings("unchecked")
ActionListener<BulkResponse> actionListener = (ActionListener<BulkResponse>) listener;
processBulkIndexRequest(task, bulkRequest, action, chain, actionListener);
} else {
chain.proceed(task, action, request, listener);
}
break;
default:
chain.proceed(task, action, request, listener);
break;
}
}
@Override
public <Response extends ActionResponse> void apply(String action, Response response, ActionListener<Response> listener, ActionFilterChain<?, Response> chain) {
chain.proceed(action, response, listener);
}
void processIndexRequest(Task task, String action, ActionListener listener, ActionFilterChain chain, IndexRequest indexRequest) {
executionService.execute(indexRequest, t -> {
logger.error("failed to execute pipeline [{}]", t, indexRequest.getPipeline());
listener.onFailure(t);
}, success -> {
// TransportIndexAction uses IndexRequest and same action name on the node that receives the request and the node that
// processes the primary action. This could lead to a pipeline being executed twice for the same
// index request, hence we set the pipeline to null once its execution completed.
indexRequest.setPipeline(null);
chain.proceed(task, action, indexRequest, listener);
});
}
void processBulkIndexRequest(Task task, BulkRequest original, String action, ActionFilterChain chain, ActionListener<BulkResponse> listener) {
BulkRequestModifier bulkRequestModifier = new BulkRequestModifier(original);
executionService.execute(() -> bulkRequestModifier, (indexRequest, throwable) -> {
logger.debug("failed to execute pipeline [{}] for document [{}/{}/{}]", indexRequest.getPipeline(), indexRequest.index(), indexRequest.type(), indexRequest.id(), throwable);
bulkRequestModifier.markCurrentItemAsFailed(throwable);
}, (throwable) -> {
if (throwable != null) {
logger.error("failed to execute pipeline for a bulk request", throwable);
listener.onFailure(throwable);
} else {
BulkRequest bulkRequest = bulkRequestModifier.getBulkRequest();
ActionListener<BulkResponse> actionListener = bulkRequestModifier.wrapActionListenerIfNeeded(listener);
if (bulkRequest.requests().isEmpty()) {
// at this stage, the transport bulk action can't deal with a bulk request with no requests,
// so we stop and send an empty response back to the client.
// (this will happen if pre-processing all items in the bulk failed)
actionListener.onResponse(new BulkResponse(new BulkItemResponse[0], 0));
} else {
chain.proceed(task, action, bulkRequest, actionListener);
}
}
});
}
@Override
public int order() {
return Integer.MAX_VALUE;
}
final static class BulkRequestModifier implements Iterator<ActionRequest<?>> {
final BulkRequest bulkRequest;
final Set<Integer> failedSlots;
final List<BulkItemResponse> itemResponses;
int currentSlot = -1;
int[] originalSlots;
BulkRequestModifier(BulkRequest bulkRequest) {
this.bulkRequest = bulkRequest;
this.failedSlots = new HashSet<>();
this.itemResponses = new ArrayList<>(bulkRequest.requests().size());
}
@Override
public ActionRequest next() {
return bulkRequest.requests().get(++currentSlot);
}
@Override
public boolean hasNext() {
return (currentSlot + 1) < bulkRequest.requests().size();
}
BulkRequest getBulkRequest() {
if (itemResponses.isEmpty()) {
return bulkRequest;
} else {
BulkRequest modifiedBulkRequest = new BulkRequest();
modifiedBulkRequest.refresh(bulkRequest.refresh());
modifiedBulkRequest.consistencyLevel(bulkRequest.consistencyLevel());
modifiedBulkRequest.timeout(bulkRequest.timeout());
int slot = 0;
originalSlots = new int[bulkRequest.requests().size() - failedSlots.size()];
for (int i = 0; i < bulkRequest.requests().size(); i++) {
ActionRequest request = bulkRequest.requests().get(i);
if (failedSlots.contains(i) == false) {
modifiedBulkRequest.add(request);
originalSlots[slot++] = i;
}
}
return modifiedBulkRequest;
}
}
ActionListener<BulkResponse> wrapActionListenerIfNeeded(ActionListener<BulkResponse> actionListener) {
if (itemResponses.isEmpty()) {
return actionListener;
} else {
return new IngestBulkResponseListener(originalSlots, itemResponses, actionListener);
}
}
void markCurrentItemAsFailed(Throwable e) {
IndexRequest indexRequest = (IndexRequest) bulkRequest.requests().get(currentSlot);
// We hit a error during preprocessing a request, so we:
// 1) Remember the request item slot from the bulk, so that we're done processing all requests we know what failed
// 2) Add a bulk item failure for this request
// 3) Continue with the next request in the bulk.
failedSlots.add(currentSlot);
BulkItemResponse.Failure failure = new BulkItemResponse.Failure(indexRequest.index(), indexRequest.type(), indexRequest.id(), e);
itemResponses.add(new BulkItemResponse(currentSlot, indexRequest.opType().lowercase(), failure));
}
}
private final static class IngestBulkResponseListener implements ActionListener<BulkResponse> {
private final int[] originalSlots;
private final List<BulkItemResponse> itemResponses;
private final ActionListener<BulkResponse> actionListener;
IngestBulkResponseListener(int[] originalSlots, List<BulkItemResponse> itemResponses, ActionListener<BulkResponse> actionListener) {
this.itemResponses = itemResponses;
this.actionListener = actionListener;
this.originalSlots = originalSlots;
}
@Override
public void onResponse(BulkResponse bulkItemResponses) {
for (int i = 0; i < bulkItemResponses.getItems().length; i++) {
itemResponses.add(originalSlots[i], bulkItemResponses.getItems()[i]);
}
actionListener.onResponse(new BulkResponse(itemResponses.toArray(new BulkItemResponse[itemResponses.size()]), bulkItemResponses.getTookInMillis()));
}
@Override
public void onFailure(Throwable e) {
actionListener.onFailure(e);
}
}
}
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