How to call class os functions defined in share/vm/runtime/os.hpp?

HI. I haven't coded in C for some time, and no experience with JNI
I dabbled a bit in JNI and creating native functions.
I would like to know, how can I call Java VM os functions from my own libraries without much hassle? e.g. os::javaTimeMillis(), or os::active_processor_count() ?
#include "HelloWorld.h"
JNIEXPORT void JNICALL Java_HelloWorld_sayHi
(JNIEnv *env, jclass clazz) {
printf("Hello\n");
long x = os::javaTimeMillis(); // HOW TO DO THAT?
Including src/share/vm/runtime/os.hpp seems overkill with lot of dependencies?
http://hg.openjdk.java.net/jdk8/jdk8/hotspot/file/87ee5ee27509/src/share/vm/runtime/os.hpp
Could I create a custom header file copy-pasting parts from os.hpp to make some functions known?
And I don't want to java-call the native java methods that mapped to these os functions, but call C functions directly.

Two parts
1. How do you write C code.
2. How do you use JNI to interface between java and C code.
1 is independent from 2 but 2 requires 1 because you can't do it if you don't know how to write C code.
If you want to do JNI then you start by writing C code and debugging the C code. No JNI at all in that process.
After you complete that then you write wrappers around the C code which are JNI.
JNI code tends to make Java unstable because bugs in JNI code will cause the VM to crash. So it is often better to find an executable that does what one wants and then use Java Runtime.exec to manage that executable. That is going to be true even if one is writing the executable (like in C.)
To learn C you should start with a C site.

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but i'd seen that link wen i searched in google..
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************ source *************
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java.sql.CallableStatement cstmt = null;
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Vector v = new Vector();
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well, I tried the preparedStatemnet and it worked. Case closed.

How to use the Table Function defined in package in OWB?

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I am trying to execute a function called xxhr_trg_evaluation_pkg.xx_get_class_desc(1);
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String outputVal="";
//pass input value to the callable statement
try{
cs.setString(2,1+"");
catch(Exception e){
try{
cs.execute();
outputVal=cs.getString(1);
catch(Exception e){
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How to call PL/SQL function and pass parameter to ODI variable?

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Refer this http://odiexperts.com/how-to-use-plsql-procedures-and-functions-in-odi
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How to call PL/SQL function from php

I have one function define in package,like below
>>
create or replace package body Intg$Label_DB as
Future constant date := to_date ('21990101', 'YYYYMMDD');
Max_Annotation_Len integer := 3995;
function Get_Tagged_Label (Product_Name varchar2,Branch_Name varchar2, Platform_Name varchar2, Schema_Name varchar2) return varchar2 is
Series_Id integer := Get_Series (Product_Name,Branch_Name,Platform_Name);
Schema_Id integer := Get_Schema (Schema_Name);
Dep_Label_Id integer;
Next_Dep_Label_Id integer;
Result_Id integer;
Result Intg$Labels.Name%type;
begin
select SLT.Dep_Label_Id, SLT.Next_Dep_Label_Id into Dep_Label_Id, Next_Dep_Label_Id
from Intg$Series_Label_Tags SLT
where SLT.Series_Id = Get_Tagged_Label.Series_Id and SLT.Schema_Id = Get_Tagged_Label.Schema_Id;
Result_Id := Next_Dep_Label_Id;
if Result_Id = -1 then
Result_Id := Dep_Label_Id;
end if;
select L.Name into Result from Intg$Labels L where L.Id = Result_Id;
return Result;
exception
when NO_DATA_FOUND then
return '';
end Get_Tagged_Label;
>>
i want to call Get_Tagged_Label() from php and print the output,I tried below code but seems i am missing lots of things here.Any help will be appreciate.
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// Bind the input parameter
oci_bind_by_name($stmt,':Product_Name',$name,32);
oci_bind_by_name($stmt,':Branch_name',$branch,32);
oci_bind_by_name($stmt,':Platform_Name',$pt,32);
// Bind the output parameter
oci_bind_by_name($stmt,':message',$message,32);
oci_bind_by_name($stmt,':message_1',$message_1,32);
oci_bind_by_name($stmt,':message_2',$message_2,32);
// Assign a value to the input
$name = 'PCBPEL';
$branch ='MAIN';
$pt ='GENERIC';
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Thanks
Hridyesh

What errors are you getting?
It's always helpful to know the version of PHP and the database.
When calling a function, you'll need a bind variable to hold the return value, and make sure the number of parameters match:
$sql = 'BEGIN :rv := INTG$Label_DB.Get_Tagged_Labell(:Product_Name,:Branch_name,:Platform_Name,:message); END;';
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Have you looked at my free Underground PHP and Oracle Manual at http://www.oracle.com/technology/tech/php/pdf/underground-php-oracle-manual.pdf ? Or any one of the other fine PHP-Oracle books available?

How to call pl/sql function from element values

EBS 11.5.10.2
XMLP 5.6.3
Hello,
I noticed that the output of the rdf-to-data template conversion process makes use of an undocumented feature of data templates, and I would like to get input from experts as to which situations this feature is usable.
The closest thing I can find in the documentation is a sample in the user guide. There is a "General Ledger Journals Data Template Example" that has a <dataStructure> section that contains <element> nodes which are NOT children of a <group> node. I can't find any explanation of this in the user guide.
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<dataStructure>
<group name="G_LINES" source="Q_MAIN">
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</group>
<element name="C_CALCULATED_VALUE" dataType="number" value="XX_CUSTOMPROCS.SOME_FUNCTION"/>
</dataStructure>Has anyone had any success being able to call PL/SQL functions from grouped elements? Whenever I try, it doesn't seem to work.
When I try something like this:
<dataStructure>
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</dataStructure>The <SOME_CALCULATION/> and <SOME_CALCULATION_B/> nodes come out empty in the output data xml file, but <C_CALCULATED_VALUE> would have a value as desired.

ah - perfect. That makes sense. Thank you for the response!
But what about when we need to pass parameters to those functions whos values are the results of aggregate element values?
This happens a lot in the converted data templates, where pl/sql package functions are meant to replace formula columns from the original Oracle Report. Take this example from the conversion of ARXAGMW.rdf (Aging Report, 7 Buckets):
(note the function call in the value of "Set_Percent_Inv_Inv" is using aggregate results from subgroups)
<group name="G_INV_INV" dataType="varchar2" source="Q_Invoice">
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    <element name="Total_Inv_Inv_B1" function="sum" dataType="number" value="G_Invoice.C_Inv_B1"/>
    <element name="Total_Inv_Inv_B2" function="sum" dataType="number" value="G_Invoice.C_Inv_B2"/>
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    <element name="Total_Inv_Inv_B5" function="sum" dataType="number" value="G_Invoice.C_Inv_B5"/>
    <element name="Total_Inv_Inv_B6" function="sum" dataType="number" value="G_Invoice.C_Inv_B6"/>
    <element name="Set_Percent_Inv_Inv" dataType="number" value="XX_CUSTOMPROCS.XXC_ARXAGMW.set_percent_inv_invformula(:Total_Inv_Inv_Amt, :Total_Inv_Inv_B0, :Total_Inv_Inv_B1, :Total_Inv_Inv_B2, :Total_Inv_Inv_B3, :Total_Inv_Inv_B4, :Total_Inv_Inv_B5, :Total_Inv_Inv_B6)"/>
    <element name="Sum_Percent_B0_Inv" dataType="number" value="XX_CUSTOMPROCS.XXC_ARXAGMW.Sum_Percent_B0_Inv_p"/>
    <element name="Sum_Percent_B1_Inv" dataType="number" value="XX_CUSTOMPROCS.XXC_ARXAGMW.Sum_Percent_B1_Inv_p"/>
    <element name="Sum_Percent_B2_Inv" dataType="number" value="XX_CUSTOMPROCS.XXC_ARXAGMW.Sum_Percent_B2_Inv_p"/>
    <element name="Sum_Percent_B3_Inv" dataType="number" value="XX_CUSTOMPROCS.XXC_ARXAGMW.Sum_Percent_B3_Inv_p"/>
    <element name="Sum_Percent_B4_Inv" dataType="number" value="XX_CUSTOMPROCS.XXC_ARXAGMW.Sum_Percent_B4_Inv_p"/>
    <element name="Sum_Percent_B5_Inv" dataType="number" value="XX_CUSTOMPROCS.XXC_ARXAGMW.Sum_Percent_B5_Inv_p"/>
    <element name="Sum_Percent_B6_Inv" dataType="number" value="XX_CUSTOMPROCS.XXC_ARXAGMW.Sum_Percent_B6_Inv_p"/>
    <group name="G_Cust_Inv" dataType="varchar2" source="Q_Invoice">
      <group name="G_Site_Inv" dataType="varchar2" source="Q_Invoice">
        <group name="G_1" dataType="varchar2" source="Q_Invoice">
          <group name="G_Invoice" dataType="varchar2" source="Q_Invoice">
            <element name="C_Amt_Due_Rem_Inv" dataType="number" value="C_Amt_Due_Rem_Inv"/>
            <element name="C_Inv_B0" dataType="number" value="C_Inv_B0"/>
            <element name="C_Inv_B1" dataType="number" value="C_Inv_B1"/>
            <element name="C_Inv_B2" dataType="number" value="C_Inv_B2"/>
            <element name="C_Inv_B3" dataType="number" value="C_Inv_B3"/>
            <element name="C_Inv_B4" dataType="number" value="C_Inv_B4"/>
            <element name="C_Inv_B5" dataType="number" value="C_Inv_B5"/>
            <element name="C_Inv_B6" dataType="number" value="C_Inv_B6"/>
          </group>
        </group>
      </group>
    </group>
</group>
...All of these groups and sub-groups are based on one single query, so I am not sure how I would move the function call into the query without changing the results of the function.
In the example above, elements Sum_Percent_B0_Inv through Sum_Percent_B6_Inv grab the results of the calculation done in set_percent_inv_invformula. Here is the essence of that function:
sum_percent_b0_inv := ROUND ((total_inv_inv_b0 / total_inv_inv_amt) * 100, 2);
sum_percent_b1_inv := ROUND ((total_inv_inv_b1 / total_inv_inv_amt) * 100, 2);
sum_percent_b2_inv := ROUND ((total_inv_inv_b2 / total_inv_inv_amt) * 100, 2);
sum_percent_b3_inv := ROUND ((total_inv_inv_b3 / total_inv_inv_amt) * 100, 2);
sum_percent_b4_inv := ROUND ((total_inv_inv_b4 / total_inv_inv_amt) * 100, 2);
sum_percent_b5_inv := ROUND ((total_inv_inv_b5 / total_inv_inv_amt) * 100, 2);
sum_percent_b6_inv := ROUND ((total_inv_inv_b6 / total_inv_inv_amt) * 100, 2);The only solution I can think of is to have separate queries, one for each subgroup, that do the "sum" in sql; but that seems terribly inefficient.

How to call class os functions defined in share/vm/runtime/os.hpp?

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