Build java REST API with cassandra -


i trying build rest api cassandra database don't see documentation or examples online, using datastax java driver 3.0.0. 

public class cassandradbutil {  private cluster cluster; private poolingoptions options; private session session;  public void connect(string node) {     options = new poolingoptions(). setmaxrequestsperconnection(hostdistance.local, 32768);     cluster = cluster.builder()             .addcontactpoint(node)             .withaddresstranslator(new ec2multiregionaddresstranslator())             .withpoolingoptions(options)             .build();     metadata metadata = cluster.getmetadata();     system.out.printf("connected cluster: %s\n", metadata.getclustername());     (host host : metadata.getallhosts()) {         system.out.printf("datacenter: %s; host: %s; rack: %s\n", host.getdatacenter(), host.getaddress(),                 host.getrack());     }     session = cluster.connect("dropalletcassdb"); }  public session getsession(){     if(this.cluster != null){         system.out.println("@@@@ returning old session");         return this.session;     }else{         system.out.println("@@@ creating new session");         connect("127.0.0.1");         return this.session;     } }

below function in class,

@get @path("/get") @produces(mediatype.application_json) public list<activebid> gettrackinjson() {     logger.info("loginapi: returning active bid");     session session = cassdb.getsession();     string cqlstatement = "select * active_bid username='xyz'";     (row row : session.execute(cqlstatement)) {       system.out.println(row.tostring());     }     session.close();     activebid activebid = new activebid("3d673111-894d-4fcb-84f7-7d027a9a2419", "xxx-xxx-xxxxxxx", "/p/project_id=1367777", 25, new biginteger("125"), new biginteger("150"), "2016-06-04 18:32:37");     list<activebid> activebidlist = new arraylist<activebid>();     activebidlist.add(activebid);     return activebidlist; }

in above code, have util class builds cluster , session , have gettrackinjson in class invokes when request made http://localhost:8080/cassexample/rest/get. every time invoke call /get, builds cluster , session , average response time 500ms. not sure doing wrong, not returning resultset response, returning mocked response , taking time. can please point me in right direction.

just put static class variables . following

private static cluster cluetr; private static session session; . . . create constructor of class , initialize class variables . create 1 method getsession . in first check if cluster , session variables initialized or not if not initialized create obeject of class default constructor initialize variables , send session variable.


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