Examples of com.moesol.geoserver.sync.core.ServerReconciler

com.moesol.geoserver.sync.core.ServerReconciler
Filter the next level deeper hashes so that the server is only reporting to the client the differences that the client needs to report on its next round of communication.
We save bandwidth by sending nothing any time a group/bucket on the local and remote match. When the remote side should delete all elements that match a position/prefix we send group with a null summary. This means that reconcile must look out for two special cases
1. The position/prefix might be shorter than normal position length for the current level
2. The summary might be {@code null}
It is somewhat counter intuitive, but if the client does not ask about a group/bucket, then the server thinks that group/bucket is in sync and we should send nothing. It is somewhat difficult to determine if the client not asking about a group/bucket means the client does not have the group/bucket or if it means the client thinks that group/bucket is in synch. At level zero we make it so that the client is asking about all group/bucket's. @author hastings

    Sha1SyncJson output = new Sha1SyncJson().level(2).max(1).hashes(
      new Sha1SyncPositionHash().position("aa").summary("111111"),
      new Sha1SyncPositionHash().position("bb").summary("222222"),
      new Sha1SyncPositionHash().position("cc").summary("333333")
    );
    ServerReconciler r = new ServerReconciler(local, remote);
    r.filterDownNextLevel(output);
    check(output, 0, "aa", "111111");
    check(output, 1, "bb", "222222");
    check(output, 2, "cc", "333333");
    assertEquals(3, output.hashes().size());
  }

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      new Sha1SyncPositionHash().position("aaaa").summary("aaaaaa"),
      new Sha1SyncPositionHash().position("aabb").summary("aabbbb"),
      new Sha1SyncPositionHash().position("bbbb").summary("bbbbbb"),
      new Sha1SyncPositionHash().position("ccaa").summary("ccaaaa")
    );
    ServerReconciler r = new ServerReconciler(local, remote);
    r.filterDownNextLevel(output);
    check(output, 0, "aaaa", "aaaaaa");
    check(output, 1, "aabb", "aabbbb");
    check(output, 2, "bbbb", "bbbbbb");
    check(output, 3, "dd", null);
    assertEquals(4, output.hashes().size());

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      Sha1SyncJson localSha1SyncJson = grouper.getJson();
      
      grouper.groupForLevel(m_remoteSha1SyncJson.level() + 1);
      Sha1SyncJson outputSha1SyncJson = grouper.getJson();
      
      ServerReconciler recon = new ServerReconciler(localSha1SyncJson, m_remoteSha1SyncJson);
      recon.filterDownNextLevel(outputSha1SyncJson);
      
    LOGGER.log(Level.FINER, "attributes({0}), local({1}), remote({2})", 
        new Object[] { m_featureSha1Sync.getAttributesToInclude(), localSha1SyncJson, m_remoteSha1SyncJson});
      return outputSha1SyncJson;
  }

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Related Classes of com.moesol.geoserver.sync.core.ServerReconciler

com.moesol.geoserver.sync.core.ServerReconcilerTest

com.moesol.geoserver.sync.format.FeatureCollectionSha1Sync

com.moesol.geoserver.sync.json.Sha1SyncPositionHash

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