I’m building a web portal and i’m using Hibernate to access MySQL and push the data fetched to a JSP to print it in a tabular form. I’m using Tomcat for servlet deployment. my servlet has to make 3 HQL queries and then push the data retrieved to the JSP. after i deploy the servlet,it works fine the first time i make a query using HTML form. moreover,in the Eclipse console,i can see all the 3 HQL queries being executed. but when i try to make a query again, even the same query as last time from my HTML form, I dont get any data on the JSP page(the table i was trying to fill contains only zeroes). checking the Eclipse console,i found that only the first HQL query was executed,and nothing else comes up,not even an error message. If i restart Tomcat,or just redeploy the servlet,it works,but only once again. please help
The flow is like-
HTML form -> Servlet -> JSP
String major,date,minor,ip;
double[][][] transactionTime = new double[2][50][10];
int[] testCaseId = new int[10];
String[] activityName = new String[10];
major=req.getParameter("major");
date=req.getParameter("date");
minor=req.getParameter("minor");
ip=req.getParameter("ip");
String testCaseName=req.getParameter("testCaseName");
Session session = null;
try{
SessionFactory sessionFactory = new
Configuration().configure()
.buildSessionFactory();
session =sessionFactory.openSession();
//Create Select Clause HQL
String SQL_QUERY2 ="Select testCases.activityName,testCases.testCaseID from TestCases testCases where testCases.testcaseName like \'" + testCaseName + "\'";
Query query2 = session.createQuery(SQL_QUERY2);
for(Iterator it2=query2.iterate();it2.hasNext();ctr2++)
{
Object[] act = (Object[]) it2.next();
activityName[ctr2]=(String) act[0];
testCaseId[ctr2] = (Integer) act[1];
}
for(int j=0;j<ctr2;j++){
ctr=0;
String SQL_QUERY3 ="Select tran.transactionTime from Transactions tran where tran.samples.builds.buildMajorVersion like " + major + " and tran.samples.builds.buildMinorVersion like " + minor + " and tran.samples.runDate like \'" + date + "\' and tran.testCases.testCaseID like " + testCaseId[j] + " and tran.samples.testbeds.server.ipv4Address like \'" + ip + "\'";
Query query3 = session.createQuery(SQL_QUERY3);
for(Iterator it3=query3.iterate();it3.hasNext();ctr++)
{
Object time = (Object) it3.next();
transactionTime[0][j][ctr]=(Double) time;
int precision = 100;
transactionTime[0][j][ctr] = Math.floor(transactionTime[0][j][ctr]*precision+0.5)/precision;
}
}
for(int j=0;j<ctr2;j++){
ctr3=0;
String SQL_QUERY5 ="Select tran.transactionTime from Transactions tran where tran.samples.builds.buildMajorVersion like " + major + " and tran.samples.builds.buildMinorVersion like " + minor + " and tran.samples.baseline=1";
Query query5 = session.createQuery(SQL_QUERY5);
for(Iterator it5=query5.iterate();it5.hasNext();ctr3++)
{
Object time = (Object) it5.next();
transactionTime[1][j][ctr3]=(Double) time;
int precision = 100;
transactionTime[1][j][ctr3] = Math.floor(transactionTime[1][j][ctr3]*precision+0.5)/precision;
}
}
session.close();
}
catch(Exception e){
System.out.println(e.getMessage());
}
finally{
}
req.setAttribute("major",major);
req.setAttribute("minor",minor);
req.setAttribute("date",date);
req.setAttribute("ip",ip);
req.setAttribute("testCaseName",testCaseName);
req.setAttribute("transactionTime", transactionTime);
req.setAttribute("activityName", activityName);
req.setAttribute("sampleNumBase", ctr3);
req.setAttribute("sampleNumRun", ctr);
req.getRequestDispatcher("/WEB-INF/src/BaselineRawData.jsp").forward(req, res);
}
}
Console output in Eclipse on First and successful run
Hibernate:
select
testcases0_.activityName as col_0_0_,
testcases0_.testCaseID as col_1_0_
from
TestCases testcases0_
where
testcases0_.testcaseName like 'Deploy 200 tunings on 10 devices with 0 tunings' Hibernate:
select
transactio0_.transactionTime as col_0_0_
from
Transactions transactio0_ cross
join
Samples samples1_ cross
join
Builds builds2_ cross
join
TestBeds testbeds7_ cross
join
Machines server8_
where
transactio0_.sampleId=samples1_.sampleId
and samples1_.buildId=builds2_.buildId
and samples1_.testBedId=testbeds7_.testBedId
and testbeds7_.serverId=server8_.machineId
and (
builds2_.buildMajorVersion like 4
)
and (
builds2_.buildMinorVersion like 4434
)
and (
samples1_.runDate like '2012-02-25'
)
and (
transactio0_.testCaseId like 1
)
and (
server8_.ipv4Address like '10.104.52.200'
) Hibernate:
select
transactio0_.transactionTime as col_0_0_
from
Transactions transactio0_ cross
join
Samples samples1_ cross
join
Builds builds2_ cross
join
TestBeds testbeds7_ cross
join
Machines server8_
where
transactio0_.sampleId=samples1_.sampleId
and samples1_.buildId=builds2_.buildId
and samples1_.testBedId=testbeds7_.testBedId
and testbeds7_.serverId=server8_.machineId
and (
builds2_.buildMajorVersion like 4
)
and (
builds2_.buildMinorVersion like 4434
)
and (
samples1_.runDate like '2012-02-25'
)
and (
transactio0_.testCaseId like 2
)
and (
server8_.ipv4Address like '10.104.52.200'
) Hibernate:
select
transactio0_.transactionTime as col_0_0_
from
Transactions transactio0_ cross
join
Samples samples1_ cross
join
Builds builds2_ cross
join
TestBeds testbeds7_ cross
join
Machines server8_
where
transactio0_.sampleId=samples1_.sampleId
and samples1_.buildId=builds2_.buildId
and samples1_.testBedId=testbeds7_.testBedId
and testbeds7_.serverId=server8_.machineId
and (
builds2_.buildMajorVersion like 4
)
and (
builds2_.buildMinorVersion like 4434
)
and (
samples1_.runDate like '2012-02-25'
)
and (
transactio0_.testCaseId like 3
)
and (
server8_.ipv4Address like '10.104.52.200'
) Hibernate:
select
transactio0_.transactionTime as col_0_0_
from
Transactions transactio0_ cross
join
Samples samples1_ cross
join
Builds builds2_ cross
join
TestBeds testbeds7_ cross
join
Machines server8_
where
transactio0_.sampleId=samples1_.sampleId
and samples1_.buildId=builds2_.buildId
and samples1_.testBedId=testbeds7_.testBedId
and testbeds7_.serverId=server8_.machineId
and (
builds2_.buildMajorVersion like 4
)
and (
builds2_.buildMinorVersion like 4434
)
and (
samples1_.runDate like '2012-02-25'
)
and (
transactio0_.testCaseId like 4
)
and (
server8_.ipv4Address like '10.104.52.200'
) Hibernate:
select
transactio0_.transactionTime as col_0_0_
from
Transactions transactio0_ cross
join
Samples samples1_ cross
join
Builds builds2_ cross
join
TestBeds testbeds7_ cross
join
Machines server8_
where
transactio0_.sampleId=samples1_.sampleId
and samples1_.buildId=builds2_.buildId
and samples1_.testBedId=testbeds7_.testBedId
and testbeds7_.serverId=server8_.machineId
and (
builds2_.buildMajorVersion like 4
)
and (
builds2_.buildMinorVersion like 4434
)
and (
samples1_.runDate like '2012-02-25'
)
and (
transactio0_.testCaseId like 5
)
and (
server8_.ipv4Address like '10.104.52.200'
) Hibernate:
select
transactio0_.transactionTime as col_0_0_
from
Transactions transactio0_ cross
join
Samples samples1_ cross
join
Builds builds2_ cross
join
TestBeds testbeds7_ cross
join
Machines server8_
where
transactio0_.sampleId=samples1_.sampleId
and samples1_.buildId=builds2_.buildId
and samples1_.testBedId=testbeds7_.testBedId
and testbeds7_.serverId=server8_.machineId
and (
builds2_.buildMajorVersion like 4
)
and (
builds2_.buildMinorVersion like 4434
)
and (
samples1_.runDate like '2012-02-25'
)
and (
transactio0_.testCaseId like 6
)
and (
server8_.ipv4Address like '10.104.52.200'
) Hibernate:
select
transactio0_.transactionTime as col_0_0_
from
Transactions transactio0_ cross
join
Samples samples1_ cross
join
Builds builds2_
where
transactio0_.sampleId=samples1_.sampleId
and samples1_.buildId=builds2_.buildId
and (
builds2_.buildMajorVersion like 4
)
and (
builds2_.buildMinorVersion like 4434
)
and samples1_.baseline=1 10
Console output in Eclipse on Subsequent and unsuccessful runs
Hibernate:
select
testcases0_.activityName as col_0_0_,
testcases0_.testCaseID as col_1_0_
from
TestCases testcases0_
where
testcases0_.testcaseName like 'Deploy 200 tunings on 10 devices with 0 tunings'
10
Hardik said
Problem seems with
ctr2. As your loop iteration are based on that. Where it gets initialized ?The problem was that
ctr2andctrwere declared and initialised outside d servlet code