org.elasticsearch.action.ingest.IngestProxyActionFilter Maven / Gradle / Ivy
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Elasticsearch subproject :server
/*
* 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.Action;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.ActionListenerResponseHandler;
import org.elasticsearch.action.ActionRequest;
import org.elasticsearch.action.ActionResponse;
import org.elasticsearch.action.bulk.BulkAction;
import org.elasticsearch.action.bulk.BulkRequest;
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.cluster.node.DiscoveryNode;
import org.elasticsearch.cluster.node.DiscoveryNodes;
import org.elasticsearch.cluster.service.ClusterService;
import org.elasticsearch.common.Randomness;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.tasks.Task;
import org.elasticsearch.transport.TransportResponse;
import org.elasticsearch.transport.TransportService;
import java.util.concurrent.atomic.AtomicInteger;
public final class IngestProxyActionFilter implements ActionFilter {
private final ClusterService clusterService;
private final TransportService transportService;
private final AtomicInteger randomNodeGenerator = new AtomicInteger(Randomness.get().nextInt());
@Inject
public IngestProxyActionFilter(ClusterService clusterService, TransportService transportService) {
this.clusterService = clusterService;
this.transportService = transportService;
}
@Override
public void apply(Task task, String action, Request request, ActionListener listener, ActionFilterChain chain) {
Action ingestAction;
switch (action) {
case IndexAction.NAME:
ingestAction = IndexAction.INSTANCE;
IndexRequest indexRequest = (IndexRequest) request;
if (Strings.hasText(indexRequest.getPipeline())) {
forwardIngestRequest(ingestAction, request, listener);
} else {
chain.proceed(task, action, request, listener);
}
break;
case BulkAction.NAME:
ingestAction = BulkAction.INSTANCE;
BulkRequest bulkRequest = (BulkRequest) request;
if (bulkRequest.hasIndexRequestsWithPipelines()) {
forwardIngestRequest(ingestAction, request, listener);
} else {
chain.proceed(task, action, request, listener);
}
break;
default:
chain.proceed(task, action, request, listener);
break;
}
}
@SuppressWarnings("unchecked")
private void forwardIngestRequest(Action action, ActionRequest request, ActionListener listener) {
transportService.sendRequest(randomIngestNode(), action.name(), request, new ActionListenerResponseHandler(listener, action::newResponse));
}
@Override
public void apply(String action, Response response, ActionListener listener, ActionFilterChain chain) {
chain.proceed(action, response, listener);
}
@Override
public int order() {
return Integer.MAX_VALUE;
}
private DiscoveryNode randomIngestNode() {
assert clusterService.localNode().isIngestNode() == false;
DiscoveryNodes nodes = clusterService.state().getNodes();
DiscoveryNode[] ingestNodes = nodes.getIngestNodes().values().toArray(DiscoveryNode.class);
if (ingestNodes.length == 0) {
throw new IllegalStateException("There are no ingest nodes in this cluster, unable to forward request to an ingest node.");
}
int index = getNodeNumber();
return ingestNodes[(index) % ingestNodes.length];
}
private int getNodeNumber() {
int index = randomNodeGenerator.incrementAndGet();
if (index < 0) {
index = 0;
randomNodeGenerator.set(0);
}
return index;
}
}