Examples with ReadPreference com.mongodb.ReadPreference used on opensource projects

Example 11 with ReadPreference

use of com.mongodb.ReadPreference in project jackrabbit-oak by apache.

the class ReadPreferenceIT method testMongoReadPreferencesForLocalChanges.

@Test
public void testMongoReadPreferencesForLocalChanges() throws Exception {
    //Change the default
    ReadPreference testPref = ReadPreference.secondary();
    mongoDS.getDBCollection(NODES).getDB().setReadPreference(testPref);
    NodeStore nodeStore = mk.getNodeStore();
    NodeBuilder b1 = nodeStore.getRoot().builder();
    b1.child("x").child("y");
    nodeStore.merge(b1, EmptyHook.INSTANCE, CommitInfo.EMPTY);
    mongoDS.invalidateCache();
    // the local change hasn't been replicated yet, primary must be used
    assertEquals(ReadPreference.primary(), mongoDS.getMongoReadPreference(NODES, null, "/x/y", DocumentReadPreference.PREFER_SECONDARY_IF_OLD_ENOUGH));
    // make the secondary up-to-date
    long now = Revision.getCurrentTimestamp();
    primary.addRevision(now, 0, 1, false);
    primary.addRevision(now, 0, 2, false);
    secondary.addRevision(now, 0, 1, false);
    secondary.addRevision(now, 0, 2, false);
    replica.updateRevisions();
    // local change has been replicated by now, it's fine to use secondary
    for (int i = 0; i < 400; i++) {
        assertEquals(testPref, mongoDS.getMongoReadPreference(NODES, null, "/x/y", DocumentReadPreference.PREFER_SECONDARY_IF_OLD_ENOUGH));
        Thread.sleep(5);
    }
}