solr/core/src/test/org/apache/solr/cloud/CollectionStateFormat2Test.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
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package org.apache.solr.cloud;

import org.apache.solr.client.solrj.request.CollectionAdminRequest;
import org.apache.solr.common.cloud.DocCollection;
import org.apache.solr.common.cloud.ZkStateReader;
import org.apache.zookeeper.data.Stat;
import org.junit.After;
import org.junit.BeforeClass;
import org.junit.Test;

public class CollectionStateFormat2Test extends SolrCloudTestCase {

  @BeforeClass
  public static void setupCluster() throws Exception {
    configureCluster(4)
        .addConfig("conf", configset("cloud-minimal"))
        .configure();
  }
  
  @After
  public void afterTest() throws Exception {
    cluster.deleteAllCollections();
  }
  
  @Test
  public void testZkNodeLocation() throws Exception {

    String collectionName = "myExternColl";
    CollectionAdminRequest.createCollection(collectionName, "conf", 2, 2)
        .process(cluster.getSolrClient());

    cluster.waitForActiveCollection(collectionName, 2, 4);
    
    waitForState("Collection not created", collectionName, (n, c) -> DocCollection.isFullyActive(n, c, 2, 2));
    assertTrue("State Format 2 collection path does not exist",
        zkClient().exists(ZkStateReader.getCollectionPath(collectionName), true));

    Stat stat = new Stat();
    zkClient().getData(ZkStateReader.getCollectionPath(collectionName), null, stat, true);

    DocCollection c = getCollectionState(collectionName);

    assertEquals("DocCollection version should equal the znode version", stat.getVersion(), c.getZNodeVersion() );
    assertTrue("DocCollection#getStateFormat() must be > 1", c.getStateFormat() > 1);

    // remove collection
    CollectionAdminRequest.deleteCollection(collectionName).process(cluster.getSolrClient());
    waitForState("Collection not deleted", collectionName, (n, coll) -> coll == null);

    assertFalse("collection state should not exist externally",
        zkClient().exists(ZkStateReader.getCollectionPath(collectionName), true));

  }
}