@Override
public void processDelete(DeleteUpdateCommand cmd) throws IOException {
if (!cmd.isDeleteById()) {
doDeleteByQuery(cmd);
return;
}
int hash = 0;
if (zkEnabled) {
zkCheck();
hash = hash(cmd);
nodes = setupRequest(hash);
} else {
isLeader = getNonZkLeaderAssumption(req);
}
boolean dropCmd = false;
if (!forwardToLeader) {
dropCmd = versionDelete(cmd);
}
if (dropCmd) {
// TODO: do we need to add anything to the response?
return;
}
ModifiableSolrParams params = null;
if (nodes != null) {
params = new ModifiableSolrParams(filterParams(req.getParams()));
params.set(
DISTRIB_UPDATE_PARAM,
(isLeader ? DistribPhase.FROMLEADER.toString() : DistribPhase.TOLEADER.toString()));
if (isLeader) {
params.set(
"distrib.from",
ZkCoreNodeProps.getCoreUrl(zkController.getBaseUrl(), req.getCore().getName()));
}
cmdDistrib.distribDelete(cmd, nodes, params);
}
// cmd.getIndexId == null when delete by query
// TODO: what to do when no idField?
if (returnVersions && rsp != null && cmd.getIndexedId() != null && idField != null) {
if (deleteResponse == null) {
deleteResponse = new NamedList<String>();
rsp.add("deletes", deleteResponse);
}
if (scratch == null) scratch = new CharsRef();
idField.getType().indexedToReadable(cmd.getIndexedId(), scratch);
deleteResponse.add(
scratch.toString(),
cmd
.getVersion()); // we're returning the version of the delete.. not the version of the
// doc we deleted.
}
}
@Override
public void processAdd(AddUpdateCommand cmd) throws IOException {
// TODO: check for id field?
int hash = 0;
if (zkEnabled) {
zkCheck();
hash = hash(cmd);
nodes = setupRequest(hash);
} else {
isLeader = getNonZkLeaderAssumption(req);
}
boolean dropCmd = false;
if (!forwardToLeader) {
dropCmd = versionAdd(cmd);
}
if (dropCmd) {
// TODO: do we need to add anything to the response?
return;
}
ModifiableSolrParams params = null;
if (nodes != null) {
params = new ModifiableSolrParams(filterParams(req.getParams()));
params.set(
DISTRIB_UPDATE_PARAM,
(isLeader ? DistribPhase.FROMLEADER.toString() : DistribPhase.TOLEADER.toString()));
if (isLeader) {
params.set(
"distrib.from",
ZkCoreNodeProps.getCoreUrl(zkController.getBaseUrl(), req.getCore().getName()));
}
params.set(
"distrib.from",
ZkCoreNodeProps.getCoreUrl(zkController.getBaseUrl(), req.getCore().getName()));
cmdDistrib.distribAdd(cmd, nodes, params);
}
// TODO: what to do when no idField?
if (returnVersions && rsp != null && idField != null) {
if (addsResponse == null) {
addsResponse = new NamedList<String>();
rsp.add("adds", addsResponse);
}
if (scratch == null) scratch = new CharsRef();
idField.getType().indexedToReadable(cmd.getIndexedId(), scratch);
addsResponse.add(scratch.toString(), cmd.getVersion());
}
// TODO: keep track of errors? needs to be done at a higher level though since
// an id may fail before it gets to this processor.
// Given that, it may also make sense to move the version reporting out of this
// processor too.
}
public void doDeleteByQuery(DeleteUpdateCommand cmd) throws IOException {
// even in non zk mode, tests simulate updates from a leader
if (!zkEnabled) {
isLeader = getNonZkLeaderAssumption(req);
} else {
zkCheck();
}
// NONE: we are the first to receive this deleteByQuery
// - it must be forwarded to the leader of every shard
// TO: we are a leader receiving a forwarded deleteByQuery... we must:
// - block all updates (use VersionInfo)
// - flush *all* updates going to our replicas
// - forward the DBQ to our replicas and wait for the response
// - log + execute the local DBQ
// FROM: we are a replica receiving a DBQ from our leader
// - log + execute the local DBQ
DistribPhase phase = DistribPhase.parseParam(req.getParams().get(DISTRIB_UPDATE_PARAM));
if (zkEnabled && DistribPhase.NONE == phase) {
boolean leaderForAnyShard = false; // start off by assuming we are not a leader for any shard
Map<String, Slice> slices = zkController.getClusterState().getSlices(collection);
if (slices == null) {
throw new SolrException(
ErrorCode.BAD_REQUEST,
"Cannot find collection:"
+ collection
+ " in "
+ zkController.getClusterState().getCollections());
}
ModifiableSolrParams params = new ModifiableSolrParams(filterParams(req.getParams()));
params.set(DISTRIB_UPDATE_PARAM, DistribPhase.TOLEADER.toString());
List<Node> leaders = new ArrayList<Node>(slices.size());
for (Map.Entry<String, Slice> sliceEntry : slices.entrySet()) {
String sliceName = sliceEntry.getKey();
ZkNodeProps leaderProps;
try {
leaderProps = zkController.getZkStateReader().getLeaderProps(collection, sliceName);
} catch (InterruptedException e) {
throw new SolrException(
ErrorCode.SERVICE_UNAVAILABLE, "Exception finding leader for shard " + sliceName, e);
}
// TODO: What if leaders changed in the meantime?
// should we send out slice-at-a-time and if a node returns "hey, I'm not a leader" (or we
// get an error because it went down) then look up the new leader?
// Am I the leader for this slice?
ZkCoreNodeProps coreLeaderProps = new ZkCoreNodeProps(leaderProps);
String leaderNodeName = coreLeaderProps.getCoreNodeName();
String coreName = req.getCore().getName();
String coreNodeName = zkController.getNodeName() + "_" + coreName;
isLeader = coreNodeName.equals(leaderNodeName);
if (isLeader) {
// don't forward to ourself
leaderForAnyShard = true;
} else {
leaders.add(new StdNode(coreLeaderProps));
}
}
params.remove("commit"); // this will be distributed from the local commit
cmdDistrib.distribDelete(cmd, leaders, params);
if (!leaderForAnyShard) {
return;
}
// change the phase to TOLEADER so we look up and forward to our own replicas (if any)
phase = DistribPhase.TOLEADER;
}
List<Node> replicas = null;
if (zkEnabled && DistribPhase.TOLEADER == phase) {
// This core should be a leader
isLeader = true;
replicas = setupRequest();
} else if (DistribPhase.FROMLEADER == phase) {
isLeader = false;
}
if (vinfo == null) {
super.processDelete(cmd);
return;
}
// at this point, there is an update we need to try and apply.
// we may or may not be the leader.
// Find the version
long versionOnUpdate = cmd.getVersion();
if (versionOnUpdate == 0) {
String versionOnUpdateS = req.getParams().get(VERSION_FIELD);
versionOnUpdate = versionOnUpdateS == null ? 0 : Long.parseLong(versionOnUpdateS);
}
versionOnUpdate = Math.abs(versionOnUpdate); // normalize to positive version
boolean isReplay = (cmd.getFlags() & UpdateCommand.REPLAY) != 0;
boolean leaderLogic = isLeader && !isReplay;
if (!leaderLogic && versionOnUpdate == 0) {
throw new SolrException(ErrorCode.BAD_REQUEST, "missing _version_ on update from leader");
}
vinfo.blockUpdates();
try {
if (versionsStored) {
if (leaderLogic) {
long version = vinfo.getNewClock();
cmd.setVersion(-version);
// TODO update versions in all buckets
doLocalDelete(cmd);
} else {
cmd.setVersion(-versionOnUpdate);
if (ulog.getState() != UpdateLog.State.ACTIVE
&& (cmd.getFlags() & UpdateCommand.REPLAY) == 0) {
// we're not in an active state, and this update isn't from a replay, so buffer it.
cmd.setFlags(cmd.getFlags() | UpdateCommand.BUFFERING);
ulog.deleteByQuery(cmd);
return;
}
doLocalDelete(cmd);
}
}
// since we don't know which documents were deleted, the easiest thing to do is to invalidate
// all real-time caches (i.e. UpdateLog) which involves also getting a new version of the
// IndexReader
// (so cache misses will see up-to-date data)
} finally {
vinfo.unblockUpdates();
}
// forward to all replicas
if (leaderLogic && replicas != null) {
ModifiableSolrParams params = new ModifiableSolrParams(filterParams(req.getParams()));
params.set(VERSION_FIELD, Long.toString(cmd.getVersion()));
params.set(DISTRIB_UPDATE_PARAM, DistribPhase.FROMLEADER.toString());
params.set(
"update.from",
ZkCoreNodeProps.getCoreUrl(zkController.getBaseUrl(), req.getCore().getName()));
cmdDistrib.distribDelete(cmd, replicas, params);
cmdDistrib.finish();
}
if (returnVersions && rsp != null) {
if (deleteByQueryResponse == null) {
deleteByQueryResponse = new NamedList<String>();
rsp.add("deleteByQuery", deleteByQueryResponse);
}
deleteByQueryResponse.add(cmd.getQuery(), cmd.getVersion());
}
}
