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Made holdability example much clear.

This commit is contained in:
Venkata Kiran Surapaneni 2019-02-11 08:28:20 -05:00
parent 435f198298
commit b4041f577d
1 changed files with 46 additions and 19 deletions
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65
persistence-modules/core-java-persistence/src/test/java/com/baeldung/jdbc/ResultSetLiveTest.java
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@ -175,54 +175,60 @@ public class ResultSetLiveTest {
@Test
public void givenDbConnectionJ_whenClosedCursor_thenCorrect() throws SQLException {
int numOfRows = 0;
Employee employee = null;
dbConnection.setHoldability(ResultSet.CLOSE_CURSORS_AT_COMMIT);
try (Statement pstmt = dbConnection.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE, ResultSet.CLOSE_CURSORS_AT_COMMIT)) {
dbConnection.setAutoCommit(false);
pstmt.executeUpdate("INSERT INTO employees (name, salary,position) VALUES ('Chris',2100.0,'Manager')");
ResultSet rs = pstmt.executeQuery("select * from employees");
dbConnection.commit();
while (rs.next()) {
Employee employee = populateResultSet(rs);
if (rs.getString("name")
.equalsIgnoreCase("john")) {
rs.updateString("position", "Senior Engineer");
rs.updateRow();
dbConnection.commit();
employee = populateResultSet(rs);
}
}
rs.last();
numOfRows = rs.getRow();
}
assertEquals("Inserted using close cursor after commit", 3, numOfRows);
assertEquals("Update using closed cursor", "Senior Engineer", employee.getPosition());
}
@Test
public void givenDbConnectionK_whenUpdate_thenCorrect() throws SQLException {
int numOfRows = 0;
Employee employee = null;
dbConnection.setHoldability(ResultSet.HOLD_CURSORS_OVER_COMMIT);
try (Statement pstmt = dbConnection.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE, ResultSet.HOLD_CURSORS_OVER_COMMIT)) {
dbConnection.setAutoCommit(false);
pstmt.executeUpdate("INSERT INTO employees (name, salary,position) VALUES ('Michael',1200.0,'Consultant')");
ResultSet rs = pstmt.executeQuery("select * from employees");
dbConnection.commit();
while (rs.next()) {
Employee employee = populateResultSet(rs);
if (rs.getString("name")
.equalsIgnoreCase("john")) {
rs.updateString("name", "John Doe");
rs.updateRow();
dbConnection.commit();
employee = populateResultSet(rs);
}
}
rs.last();
numOfRows = rs.getRow();
}
assertEquals("Inserted using hold cursor after commit", 4, numOfRows);
assertEquals("Update using open cursor", "John Doe", employee.getName());
}
@Test
public void givenDbConnectionM_whenDelete_thenCorrect() throws SQLException {
int numOfRows = 0;
try (PreparedStatement pstmt = dbConnection.prepareStatement("select * from employees", ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE); ResultSet rs = pstmt.executeQuery()) {
rs.absolute(3);
rs.absolute(2);
rs.deleteRow();
}
try (PreparedStatement pstmt = dbConnection.prepareStatement("select * from employees", ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE); ResultSet rs = pstmt.executeQuery()) {
rs.last();
numOfRows = rs.getRow();
}
assertEquals("Deleted row", 3, numOfRows);
assertEquals("Deleted row", 1, numOfRows);
}
@Test
@ -231,12 +237,33 @@ public class ResultSetLiveTest {
try (PreparedStatement pstmt = dbConnection.prepareStatement("select * from employees", ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE); ResultSet rs = pstmt.executeQuery()) {
while (rs.next()) {
Assert.assertEquals(1000.0, rs.getDouble("salary"));
Assert.assertEquals(1100.0, rs.getDouble("salary"));
rs.updateDouble("salary", 1100.0);
rs.updateDouble("salary", 1200.0);
rs.updateRow();
Assert.assertEquals(1100.0, rs.getDouble("salary"));
Assert.assertEquals(1200.0, rs.getDouble("salary"));
String name = rs.getString("name");
Integer empId = rs.getInt("emp_id");
Double salary = rs.getDouble("salary");
String position = rs.getString("position");
employee = new Employee(empId, name, salary, position);
}
}
}
@Test
public void givenDbConnectionC_whenUpdateByIndex_thenCorrect() throws SQLException {
Employee employee = null;
try (PreparedStatement pstmt = dbConnection.prepareStatement("select * from employees", ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE); ResultSet rs = pstmt.executeQuery()) {
while (rs.next()) {
Assert.assertEquals(1000.0, rs.getDouble(4));
rs.updateDouble(4, 1100.0);
rs.updateRow();
Assert.assertEquals(1100.0, rs.getDouble(4));
String name = rs.getString("name");
Integer empId = rs.getInt("emp_id");
@ -320,7 +347,7 @@ public class ResultSetLiveTest {
pstmt.close();
}
assertEquals(4, listOfEmployees.size());
assertEquals(2, listOfEmployees.size());
}
@AfterClass
@ -329,4 +356,4 @@ public class ResultSetLiveTest {
deleteStmt.execute();
dbConnection.close();
}
}
}