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 * Licensed to Elasticsearch under one or more contributor
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 * 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,
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 * KIND, either express or implied.  See the License for the
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package org.elasticsearch.action.admin.cluster.validate.template;

import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.action.support.HandledTransportAction;
import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.common.bytes.BytesReference;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.util.concurrent.AbstractRunnable;
import org.elasticsearch.script.ExecutableScript;
import org.elasticsearch.script.ScriptContext;
import org.elasticsearch.script.ScriptService;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;

import java.util.Collections;

public class TransportRenderSearchTemplateAction extends HandledTransportAction {

    private final ScriptService scriptService;

    @Inject
    public TransportRenderSearchTemplateAction(ScriptService scriptService, Settings settings, ThreadPool threadPool,
            TransportService transportService, ActionFilters actionFilters, IndexNameExpressionResolver indexNameExpressionResolver) {
        super(settings, RenderSearchTemplateAction.NAME, threadPool, transportService, actionFilters, indexNameExpressionResolver, RenderSearchTemplateRequest.class);
        this.scriptService = scriptService;
    }

    @Override
    protected void doExecute(final RenderSearchTemplateRequest request, final ActionListener listener) {
        threadPool.generic().execute(new AbstractRunnable() {

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

            @Override
            protected void doRun() throws Exception {
                ExecutableScript executable = scriptService.executable(request.template(), ScriptContext.Standard.SEARCH, request, Collections.emptyMap());
                BytesReference processedTemplate = (BytesReference) executable.run();
                RenderSearchTemplateResponse response = new RenderSearchTemplateResponse();
                response.source(processedTemplate);
                listener.onResponse(response);
            }
        });
    }

}




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