private void createRetrieveDocs(ResponseBuilder rb) {
// TODO: in a system with nTiers > 2, we could be passed "ids" here
// unless those requests always go to the final destination shard
// for each shard, collect the documents for that shard.
HashMap<String, Collection<ShardDoc>> shardMap = new HashMap<String, Collection<ShardDoc>>();
for (ShardDoc sdoc : rb.resultIds.values()) {
Collection<ShardDoc> shardDocs = shardMap.get(sdoc.shard);
if (shardDocs == null) {
shardDocs = new ArrayList<ShardDoc>();
shardMap.put(sdoc.shard, shardDocs);
}
shardDocs.add(sdoc);
}
SchemaField uniqueField = rb.req.getSchema().getUniqueKeyField();
// Now create a request for each shard to retrieve the stored fields
for (Collection<ShardDoc> shardDocs : shardMap.values()) {
ShardRequest sreq = new ShardRequest();
sreq.purpose = ShardRequest.PURPOSE_GET_FIELDS;
sreq.shards = new String[] {shardDocs.iterator().next().shard};
sreq.params = new ModifiableSolrParams();
// add original params
sreq.params.add(rb.req.getParams());
// no need for a sort, we already have order
sreq.params.remove(CommonParams.SORT);
// we already have the field sort values
sreq.params.remove(ResponseBuilder.FIELD_SORT_VALUES);
// make sure that the id is returned for correlation.
String fl = sreq.params.get(CommonParams.FL);
if (fl != null) {
fl = fl.trim();
// currently, "score" is synonymous with "*,score" so
// don't add "id" if the fl is empty or "score" or it would change the meaning.
if (fl.length() != 0 && !"score".equals(fl) && !"*".equals(fl)) {
sreq.params.set(CommonParams.FL, fl + ',' + uniqueField.getName());
}
}
ArrayList<String> ids = new ArrayList<String>(shardDocs.size());
for (ShardDoc shardDoc : shardDocs) {
// TODO: depending on the type, we may need more tha a simple toString()?
ids.add(shardDoc.id.toString());
}
sreq.params.add(ShardParams.IDS, StrUtils.join(ids, ','));
rb.addRequest(this, sreq);
}
}
private void createMainQuery(ResponseBuilder rb) {
ShardRequest sreq = new ShardRequest();
sreq.purpose = ShardRequest.PURPOSE_GET_TOP_IDS;
sreq.params = new ModifiableSolrParams(rb.req.getParams());
// TODO: base on current params or original params?
// don't pass through any shards param
sreq.params.remove(ShardParams.SHARDS);
// set the start (offset) to 0 for each shard request so we can properly merge
// results from the start.
if (rb.shards_start > -1) {
// if the client set shards.start set this explicitly
sreq.params.set(CommonParams.START, rb.shards_start);
} else {
sreq.params.set(CommonParams.START, "0");
}
// TODO: should we even use the SortSpec? That's obtained from the QParser, and
// perhaps we shouldn't attempt to parse the query at this level?
// Alternate Idea: instead of specifying all these things at the upper level,
// we could just specify that this is a shard request.
if (rb.shards_rows > -1) {
// if the client set shards.rows set this explicity
sreq.params.set(CommonParams.ROWS, rb.shards_rows);
} else {
sreq.params.set(
CommonParams.ROWS, rb.getSortSpec().getOffset() + rb.getSortSpec().getCount());
}
// in this first phase, request only the unique key field
// and any fields needed for merging.
sreq.params.set(ResponseBuilder.FIELD_SORT_VALUES, "true");
if ((rb.getFieldFlags() & SolrIndexSearcher.GET_SCORES) != 0
|| rb.getSortSpec().includesScore()) {
sreq.params.set(CommonParams.FL, rb.req.getSchema().getUniqueKeyField().getName() + ",score");
} else {
sreq.params.set(CommonParams.FL, rb.req.getSchema().getUniqueKeyField().getName());
}
rb.addRequest(this, sreq);
}