Examples with CloudSolrStream org.apache.solr.client.solrj.io.stream.CloudSolrStream used on opensource projects

Example 1 with CloudSolrStream

use of org.apache.solr.client.solrj.io.stream.CloudSolrStream in project lucene-solr by apache.

the class ModelCache method getModel.

public Tuple getModel(String zkHost, String collection, String modelID, long checkMillis) throws IOException {
    Model model = null;
    long currentTime = new Date().getTime();
    synchronized (this) {
        model = models.get(modelID);
        if (model != null && ((currentTime - model.getLastChecked()) <= checkMillis)) {
            return model.getTuple();
        }
        if (model != null) {
            //model is expired
            models.remove(modelID);
        }
    }
    //Model is not in cache or has expired so fetch the model
    ModifiableSolrParams params = new ModifiableSolrParams();
    params.set("q", "name_s:" + modelID);
    params.set("fl", "terms_ss, idfs_ds, weights_ds, iteration_i, _version_");
    params.set(SORT, "iteration_i desc");
    StreamContext streamContext = new StreamContext();
    streamContext.setSolrClientCache(solrClientCache);
    CloudSolrStream stream = new CloudSolrStream(zkHost, collection, params);
    stream.setStreamContext(streamContext);
    Tuple tuple = null;
    try {
        stream.open();
        tuple = stream.read();
        if (tuple.EOF) {
            return null;
        }
    } finally {
        stream.close();
    }
    synchronized (this) {
        //check again to see if another thread has updated the same model
        Model m = models.get(modelID);
        if (m != null) {
            Tuple t = m.getTuple();
            long v = t.getLong(VERSION_FIELD);
            if (v >= tuple.getLong(VERSION_FIELD)) {
                return t;
            } else {
                models.put(modelID, new Model(tuple, currentTime));
                return tuple;
            }
        } else {
            models.put(modelID, new Model(tuple, currentTime));
            return tuple;
        }
    }
}