/*
* 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.
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package org.apache.jackrabbit.oak.plugins.mongomk;
import org.apache.jackrabbit.oak.plugins.mongomk.util.MongoConnection;
import org.json.simple.JSONObject;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
/**
* Test case for OAK-1170.
*/
public class ClusterJoinTest extends AbstractMongoConnectionTest {
@Test
public void nodeJoins() throws Exception {
String rev1, rev2, rev3;
// perform manual background ops
mk.getNodeStore().setAsyncDelay(0);
rev1 = mk.commit("/", "+\"foo\":{}", null, null);
// start a new MongoMK instance. this instance sees /foo
// because it started after the commit on the first MongoMK
MongoMK mk2 = new MongoMK.Builder().setAsyncDelay(0)
.setMongoDB(new MongoConnection(HOST, PORT, DB).getDB()).open();
try {
// this creates a first commit from the second MongoMK instance
// the first MongoMK instance does not see this yet
mk2.commit("/", "+\"bar\":{}+\"bla\":{}", null, null);
// create a commit on the first MongoMK. this commit revision
// is higher than the previous commit on the second MongoMK
rev2 = mk.commit("/", "+\"baz\":{}+\"qux\":{}", null, null);
// @rev1 must only see /foo
assertChildNodeCount("/", rev1, 1);
// read children @rev2, should not contain /bar, /bla
// because there was no background read yet
JSONObject obj = parseJSONObject(mk.getNodes("/", rev2, 0, 0, 10, null));
// make changes from second MongoMK visible
mk2.runBackgroundOperations();
mk.runBackgroundOperations();
// check child nodes of previous getNodes() call
for (Object key : obj.keySet()) {
String name = key.toString();
if (name.startsWith(":")) {
continue;
}
assertNodesExist(rev2, "/" + name);
}
// must only see /foo, /baz and /qux @rev2
assertEquals(3L, obj.get(":childNodeCount"));
// @rev3 is after background read
rev3 = mk.getHeadRevision();
// now all nodes must be visible
obj = parseJSONObject(mk.getNodes("/", rev3, 0, 0, 10, null));
for (Object key : obj.keySet()) {
String name = key.toString();
if (name.startsWith(":")) {
continue;
}
assertNodesExist(rev3, "/" + name);
}
// must now see all nodes @rev3
assertEquals(5L, obj.get(":childNodeCount"));
} finally {
mk2.dispose();
}
}
}