1. fix "exit(0)" bug when open RDF file failed.

2. update api example code.

author: hanshuo

Database/Database.cpp

@@ -221,6 +221,7 @@ bool Database::remove(const string& _rdf_file)
 bool Database::build(const string& _rdf_file)
 {
     long tv_build_begin = util::get_cur_time();
+    bool flag = true;
 
     std::string store_path = this->name;
     util::create_dir(store_path);
@@ -233,8 +234,14 @@ bool Database::build(const string& _rdf_file)
 
     cout << "begin encode RDF from : " << _rdf_file << " ..." << endl;
     // to be switched to new encodeRDF method.
-//    this->encodeRDF(_rdf_file);
-    this->encodeRDF_new(_rdf_file);
+//    flag = this->encodeRDF(_rdf_file);
+    flag = this->encodeRDF_new(_rdf_file);
+    if (!flag)
+    {
+        std::cout << "encode RDF failed."<< std::endl;
+        return false;
+    }
+
     cout << "finish encode." << endl;
     std::string _entry_file = this->getSignatureBFile();
     (this->kvstore)->open();
@@ -474,27 +481,27 @@ bool Database::encodeRDF(const string _rdf_file)
 bool Database::encodeRDF_new(const string _rdf_file)
 {
 	Database::log("In encodeRDF_new");
+	bool flag = true;
+
 	int ** _p_id_tuples = NULL;
 	int _id_tuples_max = 0;
 
 	/* map sub2id, pre2id, entity/literal in obj2id, store in kvstore, encode RDF data into signature */	
-	this->sub2id_pre2id_obj2id_RDFintoSignature(_rdf_file, _p_id_tuples, _id_tuples_max);
-
+	flag = this->sub2id_pre2id_obj2id_RDFintoSignature(_rdf_file, _p_id_tuples, _id_tuples_max);
+	if (!flag) return false;
 	/* map subid 2 objid_list  &
 	 * subIDpreID 2 objid_list &
 	 * subID 2 <preIDobjID>_list */
-	this->s2o_sp2o_s2po(_p_id_tuples, _id_tuples_max);
-
+	flag = this->s2o_sp2o_s2po(_p_id_tuples, _id_tuples_max);
+	if (!flag) return false;
 	/* map objid 2 subid_list  &
 	 * objIDpreID 2 subid_list &
 	 * objID 2 <preIDsubID>_list */
-	this->o2s_op2s_o2ps(_p_id_tuples, _id_tuples_max);
+	flag = this->o2s_op2s_o2ps(_p_id_tuples, _id_tuples_max);
+	if (!flag) return false;
 
-    bool flag = this->saveDBInfoFile();
-    if (!flag)
-    {
-        return false;
-    }
+    flag = this->saveDBInfoFile();
+    if (!flag) return false;
 
 	Database::log("finish encodeRDF_new");
 
@@ -527,14 +534,14 @@ bool Database::sub2id_pre2id_obj2id_RDFintoSignature(const string _rdf_file, int
 	ifstream _fin(_rdf_file.c_str());
 	if(!_fin){
 		cerr << "sub2id&pre2id&obj2id: Fail to open : " << _rdf_file << endl;
-		exit(0);
+		return false;
 	}
 		
 	std::string _six_tuples_file = this->getSixTuplesFile();
 	std::ofstream _six_tuples_fout(_six_tuples_file.c_str());
 	if(! _six_tuples_fout){
 		cerr << "sub2id&pre2id&obj2id: Fail to open: " << _six_tuples_file << endl;
-		exit(0);
+		return false;
 	}
 
 	TripleWithObjType* triple_array = new TripleWithObjType[RDFParser::TRIPLE_NUM_PER_GROUP];
@@ -665,17 +672,18 @@ bool Database::sub2id_pre2id_obj2id_RDFintoSignature(const string _rdf_file, int
 			//_entity_bitset is used up, double the space
 			if (this->entity_num >= entitybitset_max)
 			{
-				entitybitset_max *= 2;
-				EntityBitSet** _new_entity_bitset = new EntityBitSet* [entitybitset_max];
-				memcpy(_new_entity_bitset, _entity_bitset, sizeof(EntityBitSet*) * this->entity_num);
+				EntityBitSet** _new_entity_bitset = new EntityBitSet* [entitybitset_max * 2];
+				memcpy(_new_entity_bitset, _entity_bitset, sizeof(EntityBitSet*) * entitybitset_max);
 				delete[] _entity_bitset;					
 				_entity_bitset = _new_entity_bitset;
 				
-				for(int i = this->entity_num; i < entitybitset_max; i ++)
+				for(int i = entitybitset_max; i < entitybitset_max * 2; i ++)
 				{
 					_entity_bitset[i] = new EntityBitSet();			
 					_entity_bitset[i] -> reset();
 				}
+
+				entitybitset_max *= 2;
 			}
 			
 			{

README.md

@@ -103,6 +103,13 @@ gclient is designed as a client to send commands and receive feedbacks.
     ip=127.0.0.1 port=3305
     ->
 
+You can also assign gserver's ip and port.
+
+    [root@centos74 Gstore]# ./gclient 172.31.19.15 3307
+    ip=172.31.19.15 port=3307
+    ->
+
+
 We can use these following commands now:
 
 `->import db_name rdf_triple_file_name;`

api/cpp/example/CppAPIExample.cpp

@@ -17,18 +17,18 @@ int main(int argc, char * argv[])
 
     // build a new database by a RDF file.
     // note that the relative path is related to gserver.
-    gc.build("db_LUBM10", "example/rdf_triple/LUBM_10_GStore.n3");
+    gc.build("db_LUBM10", "example/LUBM_10.n3");
 
     // then you can execute SPARQL query on this database.
     std::string sparql = "select ?x where \
                          { \
-                         ?x    rdf:type    <ub:UndergraduateStudent>. \
-                         ?y    ub:name <Course1>. \
-                         ?x    ub:takesCourse  ?y. \
-                         ?z    ub:teacherOf    ?y. \
-                         ?z    ub:name <FullProfessor1>. \
-                         ?z    ub:worksFor    ?w. \
-                         ?w    ub:name    <Department0>. \
+                         ?x    <rdf:type>    <ub:UndergraduateStudent>. \
+                         ?y    <ub:name> <Course1>. \
+                         ?x    <ub:takesCourse>  ?y. \
+                         ?z    <ub:teacherOf>    ?y. \
+                         ?z    <ub:name> <FullProfessor1>. \
+                         ?z    <ub:worksFor>    ?w. \
+                         ?w    <ub:name>    <Department0>. \
                          }";
     std::string answer = gc.query(sparql);
     std::cout << answer << std::endl;

api/java/example/JavaAPIExample.java

@@ -17,18 +17,18 @@ public class JavaAPIExample
 		
 	    // build a new database by a RDF file.
 	    // note that the relative path is related to gserver.
-		gc.build("db_LUBM10", "example/rdf_triple/LUBM_10_GStore.n3");
+		gc.build("db_LUBM10", "example/LUBM_10.n3");
 		
 		// then you can execute SPARQL query on this database.
 		String sparql = "select ?x where "
 				+ "{"
-				+ "?x    rdf:type    <ub:UndergraduateStudent>. "
-				+ "?y    ub:name <Course1>. "
-				+ "?x    ub:takesCourse  ?y. "
-				+ "?z    ub:teacherOf    ?y. "
-				+ "?z    ub:name <FullProfessor1>. "
-				+ "?z    ub:worksFor    ?w. "
-				+ "?w    ub:name    <Department0>. "
+				+ "?x    <rdf:type>    <ub:UndergraduateStudent>. "
+				+ "?y    <ub:name> <Course1>. "
+				+ "?x    <ub:takesCourse>  ?y. "
+				+ "?z    <ub:teacherOf>    ?y. "
+				+ "?z    <ub:name> <FullProfessor1>. "
+				+ "?z    <ub:worksFor>    ?w. "
+				+ "?w    <ub:name>    <Department0>. "
 				+ "}";				
 		String answer = gc.query(sparql);
 		System.out.println(answer);

main/gload.cpp

@@ -25,7 +25,15 @@ int main(int argc, char * argv[])
 	string _db_path = string(argv[1]);
 	string _rdf = string(argv[2]);
 	Database _db(_db_path);
-	_db.build(_rdf);
+	bool flag = _db.build(_rdf);
+    if (flag)
+    {
+        cout << "import RDF file to database done." << endl;
+    }
+    else
+    {
+        cout << "import RDF file to database failed." << endl;
+    }
 	system("clock");
 	return 0;
 }