public VariableResolverImpl getVariableResolver() {
try {
VariableResolverImpl resolver = null;
if (dataImporter != null && dataImporter.getCore() != null) {
resolver =
new VariableResolverImpl(
dataImporter.getCore().getResourceLoader().getCoreProperties());
} else resolver = new VariableResolverImpl();
Map<String, Object> indexerNamespace = new HashMap<String, Object>();
if (persistedProperties.getProperty(LAST_INDEX_TIME) != null) {
indexerNamespace.put(LAST_INDEX_TIME, persistedProperties.getProperty(LAST_INDEX_TIME));
} else {
// set epoch
indexerNamespace.put(LAST_INDEX_TIME, DataImporter.DATE_TIME_FORMAT.get().format(EPOCH));
}
indexerNamespace.put(INDEX_START_TIME, dataImporter.getIndexStartTime());
indexerNamespace.put("request", requestParameters.requestParams);
indexerNamespace.put("functions", functionsNamespace);
for (DataConfig.Entity entity : dataImporter.getConfig().document.entities) {
String key = entity.name + "." + SolrWriter.LAST_INDEX_KEY;
String lastIndex = persistedProperties.getProperty(key);
if (lastIndex != null) {
indexerNamespace.put(key, lastIndex);
} else {
indexerNamespace.put(key, DataImporter.DATE_TIME_FORMAT.get().format(EPOCH));
}
}
resolver.addNamespace(DataConfig.IMPORTER_NS_SHORT, indexerNamespace);
resolver.addNamespace(DataConfig.IMPORTER_NS, indexerNamespace);
return resolver;
} catch (Exception e) {
wrapAndThrow(SEVERE, e);
// unreachable statement
return null;
}
}
@SuppressWarnings("unchecked")
private void doDelta() {
addStatusMessage("Delta Dump started");
VariableResolverImpl resolver = getVariableResolver();
if (document.deleteQuery != null) {
writer.deleteByQuery(document.deleteQuery);
}
addStatusMessage("Identifying Delta");
LOG.info("Starting delta collection.");
Set<Map<String, Object>> deletedKeys = new HashSet<Map<String, Object>>();
Set<Map<String, Object>> allPks = collectDelta(root, resolver, deletedKeys);
if (stop.get()) return;
addStatusMessage("Deltas Obtained");
addStatusMessage("Building documents");
if (!deletedKeys.isEmpty()) {
allPks.removeAll(deletedKeys);
deleteAll(deletedKeys);
// Make sure that documents are not re-created
}
deletedKeys = null;
statusMessages.put("Total Changed Documents", allPks.size());
VariableResolverImpl vri = getVariableResolver();
Iterator<Map<String, Object>> pkIter = allPks.iterator();
while (pkIter.hasNext()) {
Map<String, Object> map = pkIter.next();
vri.addNamespace(DataConfig.IMPORTER_NS_SHORT + ".delta", map);
buildDocument(vri, null, map, root, true, null);
pkIter.remove();
// check for abort
if (stop.get()) break;
}
if (!stop.get()) {
LOG.info("Delta Import completed successfully");
}
}
/**
* Collects unique keys of all Solr documents for whom one or more source tables have been changed
* since the last indexed time.
*
* <p>Note: In our definition, unique key of Solr document is the primary key of the top level
* entity (unless skipped using docRoot=false) in the Solr document in data-config.xml
*
* @return an iterator to the list of keys for which Solr documents should be updated.
*/
@SuppressWarnings("unchecked")
public Set<Map<String, Object>> collectDelta(
DataConfig.Entity entity,
VariableResolverImpl resolver,
Set<Map<String, Object>> deletedRows) {
// someone called abort
if (stop.get()) return new HashSet();
EntityProcessor entityProcessor = getEntityProcessor(entity);
ContextImpl context1 =
new ContextImpl(entity, resolver, null, Context.FIND_DELTA, session, null, this);
entityProcessor.init(context1);
Set<Map<String, Object>> myModifiedPks = new HashSet<Map<String, Object>>();
if (entity.entities != null) {
for (DataConfig.Entity entity1 : entity.entities) {
// this ensures that we start from the leaf nodes
myModifiedPks.addAll(collectDelta(entity1, resolver, deletedRows));
// someone called abort
if (stop.get()) return new HashSet();
}
}
// identifying the modified rows for this entity
Map<String, Map<String, Object>> deltaSet = new HashMap<String, Map<String, Object>>();
LOG.info("Running ModifiedRowKey() for Entity: " + entity.name);
// get the modified rows in this entity
while (true) {
Map<String, Object> row = entityProcessor.nextModifiedRowKey();
if (row == null) break;
deltaSet.put(row.get(entity.getPk()).toString(), row);
importStatistics.rowsCount.incrementAndGet();
// check for abort
if (stop.get()) return new HashSet();
}
// get the deleted rows for this entity
Set<Map<String, Object>> deletedSet = new HashSet<Map<String, Object>>();
while (true) {
Map<String, Object> row = entityProcessor.nextDeletedRowKey();
if (row == null) break;
deletedSet.add(row);
// Remove deleted rows from the delta rows
String deletedRowPk = row.get(entity.getPk()).toString();
if (deltaSet.containsKey(deletedRowPk)) {
deltaSet.remove(deletedRowPk);
}
importStatistics.rowsCount.incrementAndGet();
// check for abort
if (stop.get()) return new HashSet();
}
LOG.info(
"Completed ModifiedRowKey for Entity: "
+ entity.name
+ " rows obtained : "
+ deltaSet.size());
LOG.info(
"Completed DeletedRowKey for Entity: "
+ entity.name
+ " rows obtained : "
+ deletedSet.size());
myModifiedPks.addAll(deltaSet.values());
Set<Map<String, Object>> parentKeyList = new HashSet<Map<String, Object>>();
// all that we have captured is useless (in a sub-entity) if no rows in the parent is modified
// because of these
// propogate up the changes in the chain
if (entity.parentEntity != null) {
// identifying deleted rows with deltas
for (Map<String, Object> row : myModifiedPks) {
getModifiedParentRows(
resolver.addNamespace(entity.name, row), entity.name, entityProcessor, parentKeyList);
// check for abort
if (stop.get()) return new HashSet();
}
// running the same for deletedrows
for (Map<String, Object> row : deletedSet) {
getModifiedParentRows(
resolver.addNamespace(entity.name, row), entity.name, entityProcessor, parentKeyList);
// check for abort
if (stop.get()) return new HashSet();
}
}
LOG.info("Completed parentDeltaQuery for Entity: " + entity.name);
if (entity.isDocRoot) deletedRows.addAll(deletedSet);
// Do not use entity.isDocRoot here because one of descendant entities may set rootEntity="true"
return entity.parentEntity == null
? myModifiedPks
: new HashSet<Map<String, Object>>(parentKeyList);
}
@SuppressWarnings("unchecked")
private void buildDocument(
VariableResolverImpl vr,
DocWrapper doc,
Map<String, Object> pk,
DataConfig.Entity entity,
boolean isRoot,
ContextImpl parentCtx) {
EntityProcessorWrapper entityProcessor = getEntityProcessor(entity);
ContextImpl ctx =
new ContextImpl(
entity,
vr,
null,
pk == null ? Context.FULL_DUMP : Context.DELTA_DUMP,
session,
parentCtx,
this);
entityProcessor.init(ctx);
Context.CURRENT_CONTEXT.set(ctx);
if (requestParameters.start > 0) {
writer.log(SolrWriter.DISABLE_LOGGING, null, null);
}
if (verboseDebug) {
writer.log(SolrWriter.START_ENTITY, entity.name, null);
}
int seenDocCount = 0;
try {
while (true) {
if (stop.get()) return;
if (importStatistics.docCount.get() > (requestParameters.start + requestParameters.rows))
break;
try {
seenDocCount++;
if (seenDocCount > requestParameters.start) {
writer.log(SolrWriter.ENABLE_LOGGING, null, null);
}
if (verboseDebug && entity.isDocRoot) {
writer.log(SolrWriter.START_DOC, entity.name, null);
}
if (doc == null && entity.isDocRoot) {
doc = new DocWrapper();
ctx.setDoc(doc);
DataConfig.Entity e = entity;
while (e.parentEntity != null) {
addFields(
e.parentEntity, doc, (Map<String, Object>) vr.resolve(e.parentEntity.name), vr);
e = e.parentEntity;
}
}
Map<String, Object> arow = entityProcessor.nextRow();
if (arow == null) {
break;
}
// Support for start parameter in debug mode
if (entity.isDocRoot) {
if (seenDocCount <= requestParameters.start) continue;
if (seenDocCount > requestParameters.start + requestParameters.rows) {
LOG.info("Indexing stopped at docCount = " + importStatistics.docCount);
break;
}
}
if (verboseDebug) {
writer.log(SolrWriter.ENTITY_OUT, entity.name, arow);
}
importStatistics.rowsCount.incrementAndGet();
if (doc != null) {
handleSpecialCommands(arow, doc);
addFields(entity, doc, arow, vr);
}
if (entity.entities != null) {
vr.addNamespace(entity.name, arow);
for (DataConfig.Entity child : entity.entities) {
buildDocument(vr, doc, child.isDocRoot ? pk : null, child, false, ctx);
}
vr.removeNamespace(entity.name);
}
/*The child entities would have changed the CURRENT_CONTEXT. So when they are done, set it back to the old.
*
*/
Context.CURRENT_CONTEXT.set(ctx);
if (entity.isDocRoot) {
if (stop.get()) return;
if (!doc.isEmpty()) {
boolean result = writer.upload(doc);
doc = null;
if (result) {
importStatistics.docCount.incrementAndGet();
} else {
importStatistics.failedDocCount.incrementAndGet();
}
}
}
} catch (DataImportHandlerException e) {
if (verboseDebug) {
writer.log(SolrWriter.ENTITY_EXCEPTION, entity.name, e);
}
if (e.getErrCode() == DataImportHandlerException.SKIP_ROW) {
continue;
}
if (isRoot) {
if (e.getErrCode() == DataImportHandlerException.SKIP) {
importStatistics.skipDocCount.getAndIncrement();
doc = null;
} else {
LOG.error("Exception while processing: " + entity.name + " document : " + doc, e);
}
if (e.getErrCode() == DataImportHandlerException.SEVERE) throw e;
} else throw e;
} catch (Throwable t) {
if (verboseDebug) {
writer.log(SolrWriter.ENTITY_EXCEPTION, entity.name, t);
}
throw new DataImportHandlerException(DataImportHandlerException.SEVERE, t);
} finally {
if (verboseDebug) {
writer.log(SolrWriter.ROW_END, entity.name, null);
if (entity.isDocRoot) writer.log(SolrWriter.END_DOC, null, null);
Context.CURRENT_CONTEXT.remove();
}
}
}
} finally {
if (verboseDebug) {
writer.log(SolrWriter.END_ENTITY, null, null);
}
entityProcessor.destroy();
}
}