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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.script.mustache;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.action.search.TransportSearchAction;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.action.support.HandledTransportAction;
import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.common.bytes.BytesArray;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.NamedXContentRegistry;
import org.elasticsearch.common.xcontent.XContentFactory;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.index.query.QueryParseContext;
import org.elasticsearch.script.ExecutableScript;
import org.elasticsearch.script.Script;
import org.elasticsearch.script.ScriptService;
import org.elasticsearch.script.TemplateScript;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;
import java.io.IOException;
import java.util.Collections;
public class TransportSearchTemplateAction extends HandledTransportAction<SearchTemplateRequest, SearchTemplateResponse> {
private static final String TEMPLATE_LANG = MustacheScriptEngine.NAME;
private final ScriptService scriptService;
private final TransportSearchAction searchAction;
private final NamedXContentRegistry xContentRegistry;
@Inject
public TransportSearchTemplateAction(Settings settings, ThreadPool threadPool, TransportService transportService,
ActionFilters actionFilters, IndexNameExpressionResolver resolver,
ScriptService scriptService,
TransportSearchAction searchAction,
NamedXContentRegistry xContentRegistry) {
super(settings, SearchTemplateAction.NAME, threadPool, transportService, actionFilters, resolver, SearchTemplateRequest::new);
this.scriptService = scriptService;
this.searchAction = searchAction;
this.xContentRegistry = xContentRegistry;
}
@Override
protected void doExecute(SearchTemplateRequest request, ActionListener<SearchTemplateResponse> listener) {
final SearchTemplateResponse response = new SearchTemplateResponse();
try {
SearchRequest searchRequest = convert(request, response, scriptService, xContentRegistry);
if (searchRequest != null) {
searchAction.execute(searchRequest, new ActionListener<SearchResponse>() {
@Override
public void onResponse(SearchResponse searchResponse) {
try {
response.setResponse(searchResponse);
listener.onResponse(response);
} catch (Exception t) {
listener.onFailure(t);
}
}
@Override
public void onFailure(Exception t) {
listener.onFailure(t);
}
});
} else {
listener.onResponse(response);
}
} catch (IOException e) {
listener.onFailure(e);
}
}
static SearchRequest convert(SearchTemplateRequest searchTemplateRequest, SearchTemplateResponse response, ScriptService scriptService,
NamedXContentRegistry xContentRegistry) throws IOException {
Script script = new Script(searchTemplateRequest.getScriptType(), TEMPLATE_LANG, searchTemplateRequest.getScript(),
searchTemplateRequest.getScriptParams() == null ? Collections.emptyMap() : searchTemplateRequest.getScriptParams());
TemplateScript compiledScript = scriptService.compile(script, TemplateScript.CONTEXT).newInstance(script.getParams());
String source = compiledScript.execute();
response.setSource(new BytesArray(source));
SearchRequest searchRequest = searchTemplateRequest.getRequest();
if (searchTemplateRequest.isSimulate()) {
return null;
}
try (XContentParser parser = XContentFactory.xContent(XContentType.JSON).createParser(xContentRegistry, source)) {
SearchSourceBuilder builder = SearchSourceBuilder.searchSource();
builder.parseXContent(new QueryParseContext(parser));
builder.explain(searchTemplateRequest.isExplain());
builder.profile(searchTemplateRequest.isProfile());
searchRequest.source(builder);
}
return searchRequest;
}
}
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