script can be invoked only from a java stored procedure

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• Java stored procedure

  Hello
  
  I tried to register with the Java stored procedure and created a Java class for it. I am quite successful in compiling and executing the code using the Java compiler in Windows CMD, but I meet below error when I try to do the same thing via Java stored proc.
  

  PRAZY@orcl> CREATE OR REPLACE  FUNCTION WINREGREAD(REGKEY VARCHAR2,REGVALUE VARCHAR2) RETURN VARCHAR2
    2  AS
    3  LANGUAGE JAVA NAME 'WindowsRegistry.readString(java.lang.String,java.lang.String) return java.lang.String';
    4  /
  
  Function created.
  PRAZY@orcl> call winregread('Software\\MyApps','Test') into :mystring;
  call winregread('Software\\MyApps','Test') into :mystring
  *
  ERROR at line 1:
  ORA-29532: Java call terminated by uncaught Java exception: java.lang.NullPointerException
  
  
  Elapsed: 00:00:00.01
  PRAZY@orcl>

  Here's the Java code and its put
  

  //Uncomment the below like while compiling Java source in DB
  //CREATE OR REPLACE AND COMPILE JAVA SOURCE NAMED "WinRegistry" AS
  import java.lang.reflect.InvocationTargetException;
  import java.lang.reflect.Method;
  import java.util.HashMap;
  import java.util.Map;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.prefs.Preferences;
  public class WindowsRegistry {
    public static final int HKEY_CURRENT_USER = 0x80000001;
    public static final int HKEY_LOCAL_MACHINE = 0x80000002;
    public static final int REG_SUCCESS = 0;
    public static final int REG_NOTFOUND = 2;
    public static final int REG_ACCESSDENIED = 5;
    private static final int KEY_ALL_ACCESS = 0xf003f;
    private static final int KEY_READ = 0x20019;
    private static Preferences userRoot = Preferences.userRoot();
    private static Preferences systemRoot = Preferences.systemRoot();
    private static Class<? extends Preferences> userClass = userRoot.getClass();
    private static Method regOpenKey = null;
    private static Method regCloseKey = null;
    private static Method regQueryValueEx = null;
    static {
      try {
        regOpenKey = userClass.getDeclaredMethod("WindowsRegOpenKey",
            new Class[] { int.class, byte[].class, int.class });
        regOpenKey.setAccessible(true);
        regCloseKey = userClass.getDeclaredMethod("WindowsRegCloseKey",
            new Class[] { int.class });
        regCloseKey.setAccessible(true);
        regQueryValueEx = userClass.getDeclaredMethod("WindowsRegQueryValueEx",
            new Class[] { int.class, byte[].class });
        regQueryValueEx.setAccessible(true);
      }
      catch (Exception e) {
        e.printStackTrace();
      }
    }
    private WindowsRegistry() {  }
  
    public static String readString(String key, String valueName)
     throws IllegalArgumentException, IllegalAccessException,
      InvocationTargetException 
    {
  
      int hkey = HKEY_LOCAL_MACHINE;
        return readString(systemRoot, hkey, key, valueName);
    }
  
  private static String readString(Preferences root, int hkey, String key, String value)
  throws IllegalArgumentException, IllegalAccessException,
      InvocationTargetException 
    {
      try
  {
      int[] handles = (int[]) regOpenKey.invoke(root, new Object[] {
          new Integer(hkey), toCstr(key), new Integer(KEY_READ) });
  
      if (handles[1] != REG_SUCCESS) {
        return null;
      }
      byte[] valb = (byte[]) regQueryValueEx.invoke(root, new Object[] {
          new Integer(handles[0]), toCstr(value) });
      regCloseKey.invoke(root, new Object[] { new Integer(handles[0]) });
      return (valb != null ? new String(valb).trim() : null);
  }
  catch (NullPointerException e)
  { 
  return e.getMessage();
  }
    }
  // utility
    private static byte[] toCstr(String str) {
      byte[] result = new byte[str.length() + 1];
      for (int i = 0; i < str.length(); i++) {
        result[i] = (byte) str.charAt(i);
      }
      result[str.length()] = 0;
      return result;
    }
  
  //Begin - Remove the following lines while compiling Java source in DB
  public static void main(String[] args) throws Exception 
    {
  String value = "";
  value = WindowsRegistry.readString("Software\\MyApps","Test");
      System.out.println("Reg key Value is: " +value);
    }
  //End
  
  };
  
  //Output
  d:\Java_Test>javac WindowsRegistry.java
  
  d:\Java_Test>java WindowsRegistry
  Reg key Value is: TEST VALUE
  
  -----------------------------------------------------------------------------
  
  Env. Details:
  =======
  Windows Vista 32 bit
  
  DB:
  ====
  BANNER
  --------------------------------------------------------------------------------
  Oracle Database 11g Enterprise Edition Release 11.1.0.6.0 - Production

  As you can see, I get my results when I run the same command prompt class, but encounter an error when it is executed from the DB.
  
  Also, I have granted permission to the runtime using DBMS_JAVA. Is there an any other permission problem?
  
  Kindly help and let me know if you need another entry.
  
  Thank you!
  
  Kind regards
  Prazy

  The Pref class is not supported in Oracle. So I used Java SP for BACK orders executed and calling in turn REG QUERY command.
  Tested with Windows 2003, Win XP and Win Vista (32-bit).

  PRAZY@orcl> select banner from v$version;
  
  BANNER
  --------------------------------------------------------------------------------
  Oracle Database 11g Release 11.1.0.6.0 - Production
  PL/SQL Release 11.1.0.6.0 - Production
  CORE     11.1.0.6.0     Production
  TNS for 32-bit Windows: Version 11.1.0.6.0 - Production
  NLSRTL Version 11.1.0.6.0 - Production                                                                                                                                                                                                                    
  
  Elapsed: 00:00:00.00
  PRAZY@orcl> CREATE OR REPLACE AND COMPILE JAVA SOURCE NAMED "WindowsRegistry" AS
    2  import java.io.*;
    3  import java.lang.*;
    4
    5  public class WindowsRegistry {
    6
    7  public static String ReadKey(String key,String valueName)
    8  {
    9       String finalVal=null;
   10       String curVal=null;
   11       String command="reg query " + key + " /v " + valueName;
   12         try {
   13             // get runtime environment and execute child process
   14             Runtime systemShell = Runtime.getRuntime();
   15             Process output = systemShell.exec(command);
   16             // open reader to get output from process
   17             BufferedReader br = new BufferedReader (new InputStreamReader(output.getInputStream()));
   18             String line = null;
   19              while((line = br.readLine()) != null )
   20                  {
   21                 finalVal = curVal;
   22                      curVal = line;
   23                  }
   24                 output.waitFor();
   25            //get the value by calling findkeyval method
   26            finalVal=findKeyVal(finalVal.trim(),valueName);
   27             return finalVal;
   28             }
   29          catch (IOException ioe){ return "";}
   30          catch (Throwable t) { return "";}
   31  }
   32
   33  //Method to split the output and retrieve key value
   34  public static String findKeyVal(String keyLine,String valName)
   35  {
   36       String retVal="";
   37       String [] temp = null;
   38       temp = keyLine.split("\\s+");
   39       if (temp[0].equals(valName)) {
   40            for (int i=2; i CREATE OR REPLACE FUNCTION WinRegRead(keyPath varchar2,keyName varchar2) RETURN VARCHAR2
    2  AS
    3  LANGUAGE JAVA NAME 'WindowsRegistry.ReadKey(java.lang.String,java.lang.String) return java.lang.String';
    4  /
  
  Function created.
  
  Elapsed: 00:00:00.01
  PRAZY@orcl> var keyVal varchar2(50)
  PRAZY@orcl> print
  
  KEYVAL
  --------------------------------------------------------------------------------------------------------------------------------                                                                                                                          
  
  PRAZY@orcl> call WinRegRead('HKLM\Software\Oracle','inst_loc') into :keyVal;
  
  Call completed.
  
  Elapsed: 00:00:00.04
  PRAZY@orcl> print
  
  KEYVAL
  --------------------------------------------------------------------------------------------------------------------------------
  C:\Program Files (x86)\Oracle\Inventory                                                                                                                                                                                                                   
  

  Fact!

  I hope this might help someone!

  Kind regards
  Prazy

• Java stored procedures

  Hello. I am quite new to this feature, and I know, java stored procedures are built and called with a static method. My questions are:
  
  receipt of several requests, are processed in parallel or they are serialized?
  * If, at the same time, it is possible that the son has and b b finishing in the first place, I get the result of b to a?
  * If it is sequential, isn't it a bottleneck?
  
  Thank you.

  fcallem wrote:
  Thanks for your help, but what I understand from your answer, that this means that, for example, in the case many processes accessing the same java stored procedure as all requests are serialized and handled one by one. Is this correct?

  N ° number of connections to the database simultaneously executes the same java stored procedure.

  fcallem wrote:
  It's not not clear to me what happens if I have multiple threads opening their own connections and access this stored procedure, or, on the other hand, if I have a process that opens up multiple threads, but with a shared connection.

  If you have multiple threads, each with their own connection to the database, they each will perform the same procedure at the same time. If you have multiple threads sharing a single connection to the database, then each thread won't be able to run the one-at-a-time procedure, given that the connection can only be used by only one thread at a time.

  The JVM in Oracle is NOT mono-thread. You can create a java stored procedure that creates multiple threads within the database, and they work simultaneously. However, there is NO case where this would be an appropriate design.

  Read this:
  http://download.Oracle.com/docs/CD/B28359_01/Java.111/b31225/chtwo.htm#sthref293

• Cannot load the file DOC ID 109095.1 java stored procedure

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  creation: source T_SUPER_USER. CaptureStream

  loading: source T_SUPER_USER. CaptureStream

  Error creating source CaptureStream

  ORA-06550: line 1, column 75:

  PLS-00201: identifier ' DBMS_JAVA. SET_COMPILER_OPTION' must be declared

  ORA-06550: line 1, column 75:

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  ORA-04043: object DBMS_JAVA does not exist

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  SQL > @? / JavaVM/install/initjvm. SQL and

  SQL > @? / RDBMS/admin/catjava. SQL

  set line 200

  wrap off Set

  Col ComputerName format a20

  Select ComputerName, VERSION, dba_registry;

  COMPUTERNAME

  Version

  STATUS

  -------------------- ------------------------------ --------------------------------------------

  Oracle Enterprise Manager 11.2.0.3.0	VALID
  Oracle 11.2.0.3.0 database catalog	VALID
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• Re: "insufficient privileges" error when you run the Java stored procedure in another schema

  I get an "insufficient privileges" error when you run the Java stored procedure in another schema, see details below.  I don't know what are missing privileges (I already granted the EXECUTE privilege), suggestions?  -Thank you.

  Define a simple java class and deploy it as a Java stored procedure to test:

  
  

  Schema: User1

  test of the package;

  public class HelloWorld {}

  public HelloWorld() {

  Super();

  }

  public static String Hello () {}

  Return "HELLO";

  }

  }

  CREATE or REPLACE FUNCTION HELLO RETURN VARCHAR2 AUTHID CURRENT_USER AS LANGUAGE JAVA NAME ' test. HelloWorld.hello () return java.lang.String';

  Grant execute on USER2 HELLO

  Test the Java stored procedure through the PL/SQL function call (in the same schema):

  
  

  Schema: User1

  SET SERVEROUTPUT ON

  DECLARE

  v_Return VARCHAR2 (200);

  BEGIN

  v_Return: = User1. HELLO;

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  END;

  anonymous block filled

  v_Return = HELLO

  Test the Java stored procedure through the PL/SQL function call in a different pattern:

  
  

  Schema: USER2

  SET SERVEROUTPUT ON

  DECLARE

  v_Return VARCHAR2 (200);

  BEGIN

  v_Return: = User1. HELLO;

  DBMS_OUTPUT. Put_line ('v_Return =' | v_Return);

  END;

  Error report-

  ORA-01031: insufficient privileges

  ORA-06512: at "User1." HELLO', line 1

  ORA-06512: at line 4 level

  01031 00000 - "insufficient privileges".

  * Cause: An attempt was made to change the user name or password

  without the privilege appropriate. This error also occurs if

  trying to install a database without the need for employment

  access privileges.

  When Trusted Oracle is configure in DBMS MAC, this error may occur

  If the user has been granted the privilege necessary for a higher label

  that the connection is active.

  * Action: Ask the database to perform the operation or grant administrator

  the required privileges.

  For users Trusted Oracle get this error, well that granted the

  the privilege that is suitable for the top label, ask the database

  administrator to grant the privilege to the appropriate label.

  You have created the function with AUTHID CURRENT_USER, which means that the function is executed with the rights of the applicant (but not with the rights of the author). This means that the applicant must have grants (directly or through roles) on all used/accessible objects in the service. In your case the user USER2 has not granted with EXECUTE on the class/source Java test. Class HelloWorld, causing the ORA-01031 exception. You create service without AUTHID CURRENT_USER (i.e. with AUTHID DEFINE, which is by default, if you do not have a specific reason to use AUTHID CURRENT_USER) or grant EXECUTE on JAVA test SOURCE. Class HelloWorld to User2.

  Dimitar

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  }

  I says this proc used to work perfectly in a troubled past (I'm new on the client) but now has not worked for a while. When we try to compile the proc, we get the error
  "table or view does not exist", and the line is the "deletion of sys.aud$. The line "select count (*) from sys.aud$ ' seems to cause no problems, but the proc does not compile as is. If I comment out the line "remove from sys.aud$", however, the proc compiles very well.

  Confusingly, if I log in as the same account that owns this proc, I can run both the count (*) select from sys.aud$ AND remove clauses sys.aud$ with no complaint at all (by modifying slightly to work with 1 single record at a time, of course), but I can't seem the same to compile in a stored proc.

  I guess that it is related permissions? Can someone point me to the permissions of the owner needs to be able to remove from sys.aud$ in a stored procedure? Or is there something else that needs to be done here? Pointers much appreciated.

  Thank you.

  acquired through ROLE privileges are NOT applicable within the named PL/SQL procedures.

  GRANT DELETE ON SYS. AUD$ ;

• The JNI in Java, stored procedure call

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• How to use the nocopy with java stored procedures parameters

  
  --------------------------------------------------------------------------------
  Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
  PL/SQL Release 11.2.0.3.0 - Production
  CORE    11.2.0.3.0      Production
  TNS for Linux: Version 11.2.0.3.0 - Production
  NLSRTL Version 11.2.0.3.0 - Production
  
  

  I'm a PL/SQL programmer, but not a Java programmer. I have the following java function that does what it's supposed to add a pdf at the end of another pdf document:

  import oracle.sql.BLOB;
  import org.apache.pdfbox.util.PDFMergerUtility;
  import oracle.jdbc.OracleConnection;
  import oracle.jdbc.driver.OracleDriver;
  import java.io.OutputStream;
  
  public class PDFUtilities {
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            OracleConnection conn = (OracleConnection)new OracleDriver().defaultConnection();
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            BLOB outPDF = BLOB.createTemporary(conn, true ,BLOB.DURATION_SESSION);
          //create an output stream to the output blob
            OutputStream os = outPDF.setBinaryStream(0);               
          //instantiate the pdf merger utility
            PDFMergerUtility mergerUtility = new PDFMergerUtility();       
          //connect the merger to the output stream
            mergerUtility.setDestinationStream(os);
          //stream from each input blob into the merger utility
            mergerUtility.addSource(pdfdoc1.getBinaryStream());
            mergerUtility.addSource(pdfdoc2.getBinaryStream());
          //merge the 2 input pdfs
            mergerUtility.mergeDocuments();             
          //do not close the output stream
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      }
  
  }
  

  CREATE OR REPLACE package PDFTOOLS.pkg_pdf_utilities
  as
  function f_get_merged_pdf (
            pi_pdf1       blob
          , pi_pdf2    blob
    )
    return blob;
  end pkg_pdf_utilities;
  /
  
  CREATE OR REPLACE package body PDFTOOLS.pkg_pdf_utilities
  as
  function f_get_merged_pdf (
            pi_pdf1       blob
          , pi_pdf2    blob
    )
    return blob
    as language java name 
    'com.mycode.pdftools.PDFUtilities.appendPDF(oracle.sql.BLOB, oracle.sql.BLOB) return oracle.sql.BLOB';
  end PDFTOOLS.pkg_pdf_utilities;
  /
  

  It's very basic, but doesn't seem to work. However, I want to my function from PL/SQL to a procedure that looks like this:

  CREATE OR REPLACE package PDFTOOLS.pkg_pdf_utilities
  as
  procedure sp_append_pdf (
            pio_pdf2append2   IN OUT NOCOPY blob
          , pio_pdf2append   IN OUT NOCOPY blob
    )
  end pkg_pdf_utilities;
  /
  

  What is important, what I'm trying to do is to NOCOPY the BLOBs. Otherwise, I have to read my PDF files into 2 BLOBs and create a 3rd blob as output. I prefer to be able to keep the pio_pdf2append2 as the final output. What I actually do call thing in a loop to gradually add a PDF file to a big. I'm not linking this in one operation because of concerns over the use of the system and because the pdfbox library java has would have been question after 850 in PDF format, which is not completely unrealistic in my approach.

  How could I achieve this?

  Post edited by: Pollocks01 only formatted code blocks because atlassian {code} tags didn't work.

  Passage of an argument as input/OUTPUT requires the mapping to a Java array.

  Simplified example that adds one FOR the other:

  create or replace and compile java source named blob_appender_src as
  import oracle.sql.BLOB;
  import java.sql.SQLException;
  import java.io.OutputStream;
  import java.io.InputStream;
  import java.io.IOException;
  
  public class BLOBAppender {
      public static void run (BLOB[] p1, BLOB p2) throws SQLException, IOException { 
  
          InputStream is = p2.getBinaryStream();
          OutputStream os = p1[0].setBinaryStream(p1[0].length()+1);                
  
          byte[] buffer = new byte[1024];
          int len;
          while ((len = is.read(buffer)) != -1) {
              os.write(buffer, 0, len);
          }
          os.close();
          is.close();
      }
  }
  

  create or replace procedure blob_append (
    p_lob1  in out nocopy blob
  , p_lob2  in            blob
  )
  as language java name 'BLOBAppender.run(oracle.sql.BLOB[], oracle.sql.BLOB)' ;
  /
  

  SQL> declare
    2    p_lob1  blob := utl_raw.cast_to_raw('ABC');
    3    p_lob2  blob := utl_raw.cast_to_raw('DEF');
    4  begin
    5    blob_append(p_lob1, p_lob2);
    6    dbms_output.put_line(utl_raw.cast_to_varchar2(p_lob1));
    7  end;
    8  /
  
  ABCDEF
  
  PL/SQL procedure successfully completed.
  

• Impossible to use Java stored procedure java.nio.file package

  Hello

  I want to use the classes in the java.nio.file package but I have the problem that the classes are not loaded in the database (oracle 12 c with jvm) installed. I can't put my class in the database and use it in my procedure. It is always invalid because of the java.nio.file dependencies. Is it possible to load the java.nio.file package for use in my PB? I tried to load it via loadjava but then I get the error ORA-29552 java.lang.SecurityException: prohibited package name: java.nio.file.

  Thank you and best regards,

  Kai

  Java.nio.file package is available starting with Java 1.7, while Oracle 12 c JVM is 1.6, simple as that.

• call a packed stored procedure from within another stored procedure

  I have a stored procedure (STROKEQC) on a scheme that is not in a package. I want to be able to call a procedure stored that IS inside a package on the same scheme of STROKEQC. When I try the syntax below, I get an error "no function with name 'PARTICIPANTSPECIFICEDITS' exists in this area." That the procedure exists.

  /*Generate admin field data*/
      execute immediate QCPROCEDURES.PARTICIPANTSPECIFICEDITS('ALL');        
      execute immediate QCPROCEDURES.GENERATE_SURGYEAR_ERRFLAG;

  Is not the way to do inside a stored procedure?
  
  Thank you!
  Eva

  Hi, Eva,.

  You need not EXECUTE IMMEDIATE to call a stored procedure (including a procedure in a package) on the other. Just use the name and the arguments (if any):

  QCPROCEDURES.PARTICIPANTSPECIFICEDITS('ALL');
  QCPROCEDURES.GENERATE_SURGYEAR_ERRFLAG;
  

  I guess qcprocedures is the package name, and participantspecificedits and generate_surgyear_errflag are procedures in this package.

  In case you're wondering, the error was probably because you do not have a variable called participantspecificedits. If you had a dynamic code in a string called variable x, then "EXECUTE IMMEDIATE x"; would be the way to run it.