private ShardRequest createShardQuery(SolrParams params) {
ShardRequest sreq = new ShardRequest();
sreq.purpose = ShardRequest.PURPOSE_GET_TERMS;
// base shard request on original parameters
sreq.params = new ModifiableSolrParams(params);
// don't pass through the shards param
sreq.params.remove(ShardParams.SHARDS);
// remove any limits for shards, we want them to return all possible
// responses
// we want this so we can calculate the correct counts
// dont sort by count to avoid that unnecessary overhead on the shards
sreq.params.remove(TermsParams.TERMS_MAXCOUNT);
sreq.params.remove(TermsParams.TERMS_MINCOUNT);
sreq.params.set(TermsParams.TERMS_LIMIT, -1);
sreq.params.set(TermsParams.TERMS_SORT, TermsParams.TERMS_SORT_INDEX);
// TODO: is there a better way to handle this?
String qt = params.get(CommonParams.QT);
if (qt != null) {
sreq.params.add(CommonParams.QT, qt);
}
return sreq;
}
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 ShardRequest createShardQuery(SolrParams params) {
ShardRequest sreq = new ShardRequest();
sreq.purpose = ShardRequest.PURPOSE_GET_TERMS;
// base shard request on original parameters
sreq.params = new ModifiableSolrParams(params);
// remove any limits for shards, we want them to return all possible
// responses
// we want this so we can calculate the correct counts
// dont sort by count to avoid that unnecessary overhead on the shards
sreq.params.remove(TermsParams.TERMS_MAXCOUNT);
sreq.params.remove(TermsParams.TERMS_MINCOUNT);
sreq.params.set(TermsParams.TERMS_LIMIT, -1);
sreq.params.set(TermsParams.TERMS_SORT, TermsParams.TERMS_SORT_INDEX);
return 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);
}
@Override
public int distributedProcess(ResponseBuilder rb) throws IOException {
int result = ResponseBuilder.STAGE_DONE;
if (rb.stage == ResponseBuilder.STAGE_GET_FIELDS) {
// Go ask each shard for it's vectors
// 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);
}
// 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());
sreq.params.remove(CommonParams.Q); // remove the query
ArrayList<String> ids = new ArrayList<String>(shardDocs.size());
for (ShardDoc shardDoc : shardDocs) {
ids.add(shardDoc.id.toString());
}
sreq.params.add(TermVectorParams.DOC_IDS, StrUtils.join(ids, ','));
rb.addRequest(this, sreq);
}
result = ResponseBuilder.STAGE_DONE;
}
return result;
}
@Override
public void modifyRequest(ResponseBuilder rb, SearchComponent who, ShardRequest sreq) {
if (!rb.doHighlights) return;
// Turn on highlighting only only when retrieving fields
if ((sreq.purpose & ShardRequest.PURPOSE_GET_FIELDS) != 0) {
sreq.purpose |= ShardRequest.PURPOSE_GET_HIGHLIGHTS;
// should already be true...
sreq.params.set(HighlightParams.HIGHLIGHT, "true");
} else {
sreq.params.set(HighlightParams.HIGHLIGHT, "false");
}
}
@Override
protected void doExecute(final Request request, final ActionListener<Response> listener) {
ClusterState clusterState = clusterService.state();
ClusterBlockException blockException = checkGlobalBlock(clusterState, request);
if (blockException != null) {
throw blockException;
}
// update to concrete index
request.index(
clusterState.metaData().concreteSingleIndex(request.index(), request.indicesOptions()));
blockException = checkRequestBlock(clusterState, request);
if (blockException != null) {
throw blockException;
}
GroupShardsIterator groups;
try {
groups = shards(request);
} catch (Throwable e) {
listener.onFailure(e);
return;
}
final AtomicInteger indexCounter = new AtomicInteger();
final AtomicInteger failureCounter = new AtomicInteger();
final AtomicInteger completionCounter = new AtomicInteger(groups.size());
final AtomicReferenceArray<ShardActionResult> shardsResponses =
new AtomicReferenceArray<>(groups.size());
for (final ShardIterator shardIt : groups) {
ShardRequest shardRequest = newShardRequestInstance(request, shardIt.shardId().id());
// TODO for now, we fork operations on shardIt of the index
shardRequest.beforeLocalFork(); // optimize for local fork
shardRequest.operationThreaded(true);
// no need for threaded listener, we will fork when its done based on the index request
shardRequest.listenerThreaded(false);
shardAction.execute(
shardRequest,
new ActionListener<ShardResponse>() {
@Override
public void onResponse(ShardResponse result) {
shardsResponses.set(indexCounter.getAndIncrement(), new ShardActionResult(result));
returnIfNeeded();
}
@Override
public void onFailure(Throwable e) {
failureCounter.getAndIncrement();
int index = indexCounter.getAndIncrement();
if (accumulateExceptions()) {
shardsResponses.set(
index,
new ShardActionResult(
new DefaultShardOperationFailedException(
request.index, shardIt.shardId().id(), e)));
}
returnIfNeeded();
}
private void returnIfNeeded() {
if (completionCounter.decrementAndGet() == 0) {
List<ShardResponse> responses = Lists.newArrayList();
List<ShardOperationFailedException> failures = Lists.newArrayList();
for (int i = 0; i < shardsResponses.length(); i++) {
ShardActionResult shardActionResult = shardsResponses.get(i);
if (shardActionResult == null) {
assert !accumulateExceptions();
continue;
}
if (shardActionResult.isFailure()) {
assert accumulateExceptions() && shardActionResult.shardFailure != null;
failures.add(shardActionResult.shardFailure);
} else {
responses.add(shardActionResult.shardResponse);
}
}
assert failures.size() == 0 || failures.size() == failureCounter.get();
listener.onResponse(
newResponseInstance(request, responses, failureCounter.get(), failures));
}
}
});
}
}
public int createSubRequests(ResponseBuilder rb) throws IOException {
SolrParams params = rb.req.getParams();
String id1[] = params.getParams("id");
String ids[] = params.getParams("ids");
if (id1 == null && ids == null) {
return ResponseBuilder.STAGE_DONE;
}
List<String> allIds = new ArrayList<String>();
if (id1 != null) {
for (String s : id1) {
allIds.add(s);
}
}
if (ids != null) {
for (String s : ids) {
allIds.addAll(StrUtils.splitSmart(s, ",", true));
}
}
// TODO: handle collection=...?
ZkController zkController =
rb.req.getCore().getCoreDescriptor().getCoreContainer().getZkController();
// if shards=... then use that
if (zkController != null && params.get("shards") == null) {
CloudDescriptor cloudDescriptor = rb.req.getCore().getCoreDescriptor().getCloudDescriptor();
String collection = cloudDescriptor.getCollectionName();
ClusterState clusterState = zkController.getClusterState();
DocCollection coll = clusterState.getCollection(collection);
Map<String, List<String>> sliceToId = new HashMap<String, List<String>>();
for (String id : allIds) {
Slice slice = coll.getRouter().getTargetSlice(id, null, params, coll);
List<String> idsForShard = sliceToId.get(slice.getName());
if (idsForShard == null) {
idsForShard = new ArrayList<String>(2);
sliceToId.put(slice.getName(), idsForShard);
}
idsForShard.add(id);
}
for (Map.Entry<String, List<String>> entry : sliceToId.entrySet()) {
String shard = entry.getKey();
String shardIdList = StrUtils.join(entry.getValue(), ',');
ShardRequest sreq = new ShardRequest();
sreq.purpose = 1;
// sreq.shards = new String[]{shard}; // TODO: would be nice if this would work...
sreq.shards = sliceToShards(rb, collection, shard);
sreq.actualShards = sreq.shards;
sreq.params = new ModifiableSolrParams();
sreq.params.set(
ShardParams.SHARDS_QT,
"/get"); // TODO: how to avoid hardcoding this and hit the same handler?
sreq.params.set("distrib", false);
sreq.params.set("ids", shardIdList);
rb.addRequest(this, sreq);
}
} else {
String shardIdList = StrUtils.join(allIds, ',');
ShardRequest sreq = new ShardRequest();
sreq.purpose = 1;
sreq.shards = null; // ALL
sreq.actualShards = sreq.shards;
sreq.params = new ModifiableSolrParams();
sreq.params.set(
ShardParams.SHARDS_QT,
"/get"); // TODO: how to avoid hardcoding this and hit the same handler?
sreq.params.set("distrib", false);
sreq.params.set("ids", shardIdList);
rb.addRequest(this, sreq);
}
return ResponseBuilder.STAGE_DONE;
}
