IndexAliasesServiceTests.java example

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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.index.aliases;

import org.elasticsearch.common.compress.CompressedXContent;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.ToXContent;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentFactory;
import org.elasticsearch.index.IndexService;
import org.elasticsearch.index.query.QueryBuilder;
import org.elasticsearch.indices.InvalidAliasNameException;
import org.elasticsearch.test.ESSingleNodeTestCase;
import org.junit.Test;

import java.io.IOException;

import static org.elasticsearch.index.query.QueryBuilders.termQuery;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.nullValue;

/**
 *
 */
public class IndexAliasesServiceTests extends ESSingleNodeTestCase {

    public IndexAliasesService newIndexAliasesService() {
        Settings settings = Settings.builder().put("name", "IndexAliasesServiceTests").build();
        IndexService indexService = createIndex("test", settings);
        return indexService.aliasesService();
    }

    public static CompressedXContent filter(QueryBuilder filterBuilder) throws IOException {
        XContentBuilder builder = XContentFactory.jsonBuilder();
        filterBuilder.toXContent(builder, ToXContent.EMPTY_PARAMS);
        builder.close();
        return new CompressedXContent(builder.string());
    }

    @Test
    public void testFilteringAliases() throws Exception {
        IndexAliasesService indexAliasesService = newIndexAliasesService();
        indexAliasesService.add("cats", filter(termQuery("animal", "cat")));
        indexAliasesService.add("dogs", filter(termQuery("animal", "dog")));
        indexAliasesService.add("all", null);

        assertThat(indexAliasesService.hasAlias("cats"), equalTo(true));
        assertThat(indexAliasesService.hasAlias("dogs"), equalTo(true));
        assertThat(indexAliasesService.hasAlias("turtles"), equalTo(false));

        assertThat(indexAliasesService.aliasFilter("cats").toString(), equalTo("animal:cat"));
        assertThat(indexAliasesService.aliasFilter("cats", "dogs").toString(), equalTo("animal:cat animal:dog"));

        // Non-filtering alias should turn off all filters because filters are ORed
        assertThat(indexAliasesService.aliasFilter("all"), nullValue());
        assertThat(indexAliasesService.aliasFilter("cats", "all"), nullValue());
        assertThat(indexAliasesService.aliasFilter("all", "cats"), nullValue());

        indexAliasesService.add("cats", filter(termQuery("animal", "feline")));
        indexAliasesService.add("dogs", filter(termQuery("animal", "canine")));
        assertThat(indexAliasesService.aliasFilter("dogs", "cats").toString(), equalTo("animal:canine animal:feline"));
    }

    @Test
    public void testAliasFilters() throws Exception {
        IndexAliasesService indexAliasesService = newIndexAliasesService();
        indexAliasesService.add("cats", filter(termQuery("animal", "cat")));
        indexAliasesService.add("dogs", filter(termQuery("animal", "dog")));

        assertThat(indexAliasesService.aliasFilter(), nullValue());
        assertThat(indexAliasesService.aliasFilter("dogs").toString(), equalTo("animal:dog"));
        assertThat(indexAliasesService.aliasFilter("dogs", "cats").toString(), equalTo("animal:dog animal:cat"));

        indexAliasesService.add("cats", filter(termQuery("animal", "feline")));
        indexAliasesService.add("dogs", filter(termQuery("animal", "canine")));

        assertThat(indexAliasesService.aliasFilter("dogs", "cats").toString(), equalTo("animal:canine animal:feline"));
    }

    @Test(expected = InvalidAliasNameException.class)
    public void testRemovedAliasFilter() throws Exception {
        IndexAliasesService indexAliasesService = newIndexAliasesService();
        indexAliasesService.add("cats", filter(termQuery("animal", "cat")));
        indexAliasesService.remove("cats");
        indexAliasesService.aliasFilter("cats");
    }


    @Test
    public void testUnknownAliasFilter() throws Exception {
        IndexAliasesService indexAliasesService = newIndexAliasesService();
        indexAliasesService.add("cats", filter(termQuery("animal", "cat")));
        indexAliasesService.add("dogs", filter(termQuery("animal", "dog")));

        try {
            indexAliasesService.aliasFilter("unknown");
            fail();
        } catch (InvalidAliasNameException e) {
            // all is well
        }
    }


}