solr/core/src/test/org/apache/solr/search/stats/TestExactStatsCache.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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.apache.solr.search.stats;

import org.apache.solr.client.solrj.SolrClient;
import org.apache.solr.client.solrj.response.QueryResponse;
import org.apache.solr.common.SolrDocumentList;
import org.apache.solr.common.params.ModifiableSolrParams;
import org.apache.solr.common.params.ShardParams;
import org.junit.Test;

public class TestExactStatsCache extends TestBaseStatsCache {
  private int docId = 0;

  @Override
  protected String getStatsCacheClassName() {
    return ExactStatsCache.class.getName();
  }

  @Test
  @ShardsFixed(num = 3)
  public void testShardsTolerant() throws Exception {
    del("*:*");
    commit();
    for (int i = 0; i < clients.size(); i++) {
      int shard = i + 1;
      index_specific(i, id, docId++, "a_t", "one two three",
              "shard_i", shard);
      index_specific(i, id, docId++, "a_t", "one two three four five",
              "shard_i", shard);
    }
    commit();
    int expectedResults = 2 * (clients.size() - 1);

    checkShardsTolerantQuery(expectedResults, "q", "a_t:one", "fl", "*,score");
  }

  protected void checkShardsTolerantQuery(int expectedResults, Object... q) throws Exception {
    final ModifiableSolrParams params = new ModifiableSolrParams();
    for (int i = 0; i < q.length; i += 2) {
      params.add(q[i].toString(), q[i + 1].toString());
    }

    // query a random server
    params.set(ShardParams.SHARDS, getShardsStringWithOneDeadShard());
    params.set(ShardParams.SHARDS_TOLERANT, "true");
    int which = r.nextInt(clients.size());
    SolrClient client = clients.get(which);
    QueryResponse rsp = client.query(params);
    checkPartialResponse(rsp, expectedResults);
  }

  protected String getShardsStringWithOneDeadShard() {
    assertNotNull("this test requires deadServers to be non-null", deadServers);
    assertTrue("this test requires at least 2 shards", shardsArr.length > 1);

    StringBuilder sb = new StringBuilder();
    // copy over the real shard names except for the last one,
    // replace it with a dead server
    for (int shardN = 0; shardN < shardsArr.length; shardN++) {
      if (sb.length() > 0) sb.append(',');

      String shard;
      if (shardN != shardsArr.length - 1) {
        shard = shardsArr[shardN];
      } else {
        if (deadServers[0].endsWith("/")) shard = deadServers[0] + DEFAULT_TEST_COLLECTION_NAME;
        else shard = deadServers[0] + "/" + DEFAULT_TEST_CORENAME;
      }
      sb.append(shard);
    }

    return sb.toString();
  }

  protected void checkPartialResponse(QueryResponse response, int expectedResults) {
    assertTrue("should have 'partialResults' in header", (Boolean)response.getHeader().get("partialResults"));
    SolrDocumentList docList = response.getResults();
    assertEquals(expectedResults, docList.size());
    assertEquals(expectedResults, docList.getNumFound());
  }
}