I am trying to get a small java class to load into Oracle 11g so I can run it and call it from PL/SQL. I coded and compiled the class on my local machine in eclipse and it compiles fine. I packaged it up into a jar (with the other jar files it depends on in the jar). They I tried loading my jar into Oracle 11g. Everything loads in, unfortunately when it loads my custom java class, it stays invalid and when I try to compile it within Oracle it says it can't find references to the classes (the ones I had packaged in my jar with my class).
Is there some other sort of setting I need to configure?
Here is what my custom classes code looks like:
import com.flashline.registry.openapi.base.OpenAPIException;
import com.flashline.registry.openapi.entity.*;
import com.flashline.registry.openapi.service.v300.FlashlineRegistry;
import com.flashline.registry.openapi.service.v300.FlashlineRegistryServiceLocator;
import javax.xml.rpc.ServiceException;
import java.net.URL;
import java.rmi.RemoteException;
import org.apache.log4j.Logger;
import java.net.MalformedURLException;
public class AssetExtractor {
/**
* #param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
}
static Logger LOG;
static AuthToken authToken = null;
static FlashlineRegistry repository = null;
static URL repoURL;
public static FlashlineRegistry getRepository()
{
if(repository == null)
try
{
try{
repoURL = new URL("https://myserver/oer/services/FlashlineRegistry");
}catch(MalformedURLException mue)
{
LOG.error(mue);
}
repository = (new FlashlineRegistryServiceLocator()).getFlashlineRegistry(repoURL);
LOG.debug((new StringBuilder()).append("Created repository at URL=").append(repoURL.toString()).toString());
}
catch(ServiceException e)
{
LOG.error(e, e);
}
return repository;
}
public static AuthToken getAuthToken()
{
if(authToken == null)
try
{
authToken = getRepository().authTokenCreate("user", "password");
LOG.debug("Created auth token.");
}
catch(OpenAPIException e)
{
LOG.error(e, e);
}
catch(RemoteException e)
{
LOG.error(e, e);
}
else
try
{
getRepository().authTokenValidate(authToken);
}
catch(OpenAPIException e)
{
LOG.info("Auth token was invalid. Recreating auth token");
authToken = null;
return getAuthToken();
}
catch(RemoteException re)
{
LOG.error("Remote exception occured during creation of suth token after determined to be invalid", re);
re.printStackTrace();
authToken = null;
}
return authToken;
}
public static String getAssetXML(String strAssetID)
{
String strAsset = null;
try
{
strAsset = getRepository().assetReadXml(getAuthToken(), Long.parseLong(strAssetID));
}
catch(OpenAPIException e)
{
e.printStackTrace();
}
catch(RemoteException e)
{
e.printStackTrace();
}
return strAsset;
}
}
And all the *.jar files for the imports are inside my AssetExtractor.jar
The command I've been using to load the jar into oracle is:
loadjava -v -f -resolve -resolver "((* OER) (* PUBLIC))" -user oer/***** AssetExtractor.jar
Any ideas would be helpful!
So it appears that if I do the following it solves nearly all my problems:
Edit the Oracle users' .profile to SET and EXPORT the CLASSPATH, PATH, LD_LIBRARY_PATH, ORACLE_HOME, JAVA_HOME with the correct paths
SQLPlus as sys as sysdba
EXEC dbms_java.grant_permission( 'OER', 'SYS:java.util.PropertyPermission', 'java.class.path', 'write' );
OS Commandline as oracle user:
loadjava –v –grant PUBLIC <jar> -user oer/****** for all jars
SQLPlus as OER user
DECLARE
v_classpath VARCHAR2(4000);
v_path VARCHAR2(4000);
BEGIN
v_classpath := DBMS_JAVA.set_property('java.class.path', '/opt/oracle/102/jdk/lib:/mnt/hgfs/vmshare/rex_lib/aler-axis- 1.2.1.jar:/mnt/hgfs/vmshare/rex_lib/aler-axis-jaxrpc-1.2.1.jar:/mnt/hgfs/vmshare/rex_lib/client.rex- 11.1.1.5.0.jar:/mnt/hgfs/vmshare/rex_lib/commons-httpclient-3.0rc2- flashline.jar:/mnt/hgfs/vmshare/rex_lib/log4j-1.2.8.jar');
v_path := DBMS_JAVA.set_property('java.path', '/opt/oracle/102/jdk/bin');
END;
/
alter java source "AssetExtractor" compile;
show errors
The only outstanding issue is that for some reason it still can't locate/resolve some of the Oracle OER classes (which should all be in the client.rex*.jar, I opened and saw them there. If I can solve this part then I'm good to go.
Related
I'm programming a simple rmi application, and I have a problem.
If I run the registry in the same directory, it works; but if I change the directory from which I run the registry, it does not.
The registry would work generically from another host, but only the change of directory stop his functionality.
I'm working on this problem by 3 days without solution, I change also every possible configuration of the codebase parameter but nothing.
I describe the situation and code with the directory:
fileserver.java :
`package testrmi2;
import java.rmi.*;
public interface fileserver extends Remote {
public void scrivifile(String nomefile, String arg) throws RemoteException;
}
`
fileserverimpl.java:
package testrmi2;
import java.io.*;
import java.rmi.*;
import java.rmi.server.*;
public class fileserverimpl extends UnicastRemoteObject implements fileserver{
public fileserverimpl() throws RemoteException {
super();
}
public void scrivifile(String nomefile, String arg) throws RemoteException {
try {
FileWriter myfile = new FileWriter(nomefile);
myfile.write(arg);
myfile.close(); }
catch (Exception e) {System.out.println(e);}
}
public static void main (String arg[]) {
try {
fileserverimpl s = new fileserverimpl();
if (System.getSecurityManager() == null) {
System.setSecurityManager(new RMISecurityManager());
}
String codebase = System.getProperty("classpath");
System.out.println("Trying to access code base: " + codebase+"\n\nuse is "+System.getProperty("useCodebaseOnly"));
Naming.rebind("//127.0.0.1:2005/fileserverimpl", s);
System.out.println("Server attivato.");
} catch (Exception e) {System.out.println("errore inizializzazione server\n\n"+e.getMessage()+"\n\n\n");
}}}
client.java:
package testrmi2;
import java.rmi.*;
import java.io.*;
public class client {
public static void main (String arg[]) {
fileserver myserver;
String nomefile=" ";
String testo=" ";
System.out.println("Scrivi il nome del file");
nomefile=ReadString();
System.out.println("Scrivi il testo");
testo=ReadString();
try {
myserver = (fileserver) Naming.lookup("//127.0.0.1:2005/fileserverimpl");
myserver.scrivifile(nomefile, testo);
} catch (Exception e) {System.out.println(e);}
}
public static String ReadString() {
BufferedReader stdIn =new BufferedReader(new InputStreamReader(System.in));
String s=" ";
try{
s=stdIn.readLine();
}
catch(IOException e) {System.out.println(e.getMessage()); }
return s;
}
}
and the policy file is:
grant {
// Allow everything for now
permission java.security.AllPermission;
};
all this files are on the directory:
/Users/franco/Desktop/prova
to compiling it I goes in the /Users/franco/Desktop/prova directory and do in terminal :
javac -cp . -d . *.java
rmic rmic testrmi2.fileserverimpl
jar cvf testrmi2.jar testrmi2/fileserver.class testrmi2/fileserverimpl_Stub.class
after I run registry in another terminal with the following commands but in another directory:
export classpath=""
rmiregistry 2005 &
Finally I would to run the filesereveimpl.class goes with terminal in the /Users/franco/Desktop/prova directory and write :
java -classpath /Users/franco/Desktop/prova/ -Djava.rmi.server.codebase=file:/Users/franco/Desktop/prova/testrmi2.jar -Djava.security.policy=testrmi2/policy testrmi2.fileserverimpl &
But the results are:
Trying to access code base: null
use is null
errore inizializzazione server
RemoteException occurred in server thread; nested exception is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: testrmi2.fileserverimpl_Stub
I also try to public he jar on a local webserver xampp and try to run with the following:
java -classpath . -Djava.rmi.server.codebase=http://127.0.0.1/testrmi2/ -Djava.security.policy=testrmi2/policy testrmi2.fileserverimpl &
or with :
java -classpath . -Djava.rmi.server.codebase=http://127.0.0.1/testrmi2.jar -Djava.security.policy=testrmi2/policy testrmi2.fileserverimpl &
but I have the same results.
Try to set the classpath var before to execute the rmregistry:
export classpath="/Users/franco/Desktop/prova/"
rmiregistry 2005 &
There are three cases.
You got that exception in the server when exporting/constructing the remote object. Solution: run rmic to generate the stub.
You got it in the server when binding/rebinding. Solution: make the stub class available to the Registry's CLASSPATH, or run the Registry in the server JVM via LocateRegistry.createRegistry().
You got it in the client, in lookup(). Solution: make the stub class available to the client's CLASSPATH.
These also apply to the remote interface itself, and any application classes it depends on, and so on recursively until closure.
Solution for stubs to all three: take the measures outlined in the Javadoc preamble to UnicastRemoteObject, so you don't need a stub at all.
I try to get some data from a dbus service and work with it in Java.
I can get the information in cli with the following command:
dbus-send --print-reply --system --dest=com.victronenergy.solarcharger.ttyUSB0 /Dc/0/Voltage com.victronenergy.BusItem.GetValue
The result is:
method return time=1538903662.321580 sender=:1.14 -> destination=:1.806 serial=335692 reply_serial=2
variant double 13.43
What I tried to get this data in Java, is:
After hours of reading, I created an Interface.
package javadbus;
import java.util.Map;
import org.freedesktop.dbus.DBusInterface;
import org.freedesktop.dbus.DBusSignal;
import org.freedesktop.dbus.Variant;
import org.freedesktop.dbus.exceptions.DBusException;
public interface BusItem extends DBusInterface
{
public static class PropertiesChanged extends DBusSignal
{
public final Map<String,Variant> changes;
public PropertiesChanged(String path, Map<String,Variant> changes) throws DBusException
{
super(path, changes);
this.changes = changes;
}
}
public String GetDescription(String language, int length);
public Variant GetValue();
public String GetText();
public int SetValue(Variant value);
public Variant GetMin();
public Variant GetMax();
public int SetDefault();
public Variant GetDefault();
}
Here I call getConnection() and getRemoteObject() successfully.
package javadbus;
import org.freedesktop.dbus.DBusConnection;
import org.freedesktop.dbus.exceptions.DBusException;
import org.freedesktop.dbus.Variant;
public class VictronEnergyDBusSolarCharger {
private String port;
private DBusConnection conn;
public VictronEnergyDBusSolarCharger(String port) {
this.port = port;
try {
this.conn = DBusConnection.getConnection(DBusConnection.SYSTEM);
} catch (DBusException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private String getData(String item) {
BusItem bi;
String data = null;
Variant vData = null;
try {
bi = (BusItem)conn.getRemoteObject("com.victronenergy.solarcharger." + this.port, item, BusItem.class);
vData = bi.GetValue();
//data = bi.GetText();
} catch (DBusException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return data;
}
...
}
It was a big task to resolve all dependecies and get the code compiled. But finaly I did it. So, javac now runs without errors.
But if I try to call the Method GetValue(), I get the following Exception:
[Sender] INFO org.freedesktop.dbus.MessageWriter - <= MethodCall(0,1) { Path=>/org/freedesktop/DBus, Interface=>org.freedesktop.DBus, Member=>Hello, Destination=>org.freedesktop.DBus } { }
[Sender] INFO org.freedesktop.dbus.MessageWriter - <= MethodCall(0,3) { Path=>/Dc/0/Voltage, Interface=>javadbus.BusItem, Member=>GetValue, Destination=>com.victronenergy.solarcharger.ttyUSB0 } { }
Exception in thread "main" org.freedesktop.DBus$Error$UnknownMethod: Method "GetValue" with signature "" on interface "javadbus.BusItem" doesn't exist
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.freedesktop.dbus.Error.getException(Error.java:141)
at org.freedesktop.dbus.Error.throwException(Error.java:171)
at org.freedesktop.dbus.RemoteInvocationHandler.executeRemoteMethod(RemoteInvocationHandler.java:158)
at org.freedesktop.dbus.RemoteInvocationHandler.invoke(RemoteInvocationHandler.java:222)
at com.sun.proxy.$Proxy1.GetValue(Unknown Source)
at javadbus.VictronEnergyDBusSolarCharger.getData(VictronEnergyDBusSolarCharger.java:28)
at javadbus.VictronEnergyDBusSolarCharger.getDcV(VictronEnergyDBusSolarCharger.java:38)
at javadbus.MainClass.main(MainClass.java:7)
Is it necessary to make a implementation of this Method GetValue? But why e.g. how should I do this? I only want to get this Information and not provide it like a Server.
Why was it a big task to get all dependencies?
dbus-java library and dependencies are all available at maven central, so a proper maven project should just work out-of-the-box.
Back to topic:
You don't have to implement GetValue(), but you need a suitable java interface for BusItem.
As far as I can see in the documentation of victronenergy (https://www.victronenergy.com/live/open_source:ccgx:d-bus) , your interface is not correct.
You provide SetDefault()/GetDefault() methods, which are only available on com.victronenergy.settings Objects, but you want to retrieve a com.victronenergy.BusItem (no part of the com.victronenergy.settings package).
This is one error. The second error is: you use the wrong package name for your BusItem class.
In your case DBus will try to resolve an object with the path javadbus.BusItem which is not provided by the connected BusAddress com.victronenergy.solarcharger.ttyUSB0.
The BusItem class has to be in package com.victronenergy or you have to use the annotation #DBusInterfaceName("com.victronenergy.BusItem").
The annotation will tell the DBus library to ignore the java package/class name and use the one provided in the annotation.
The Inteface BusItem had been created by CreateInterface-Script from https://dbus.freedesktop.org/doc/dbus-java/dbus-java/dbus-javase10.html and the XML from Introspect()
But you solved my real problem. I used the annotation #DBusInterfaceName("com.victronenergy.BusItem") now. No Exception anymore an i get data from my solarcharger. Thank you so much!
I went through the following doc center and tried to create my own URI schema myDocs:
https://msdn.microsoft.com/en-us/library/aa767914(v=vs.85).aspx
Following is my Java program. It takes a command line argument and returns the URL in the browser.
import java.awt.Desktop;
import java.io.IOException;
public class URIOpen {
public static void main(String args[]) {
if (args.length == 0) {
return;
}
String uri = args[0];
try {
Desktop.getDesktop().browse(java.net.URI.create(uri));
} catch (IOException e) {
System.out.println(e.getMessage());
}
}
}
I updated the (Default) value field of the command key like below.
"C:\Program Files (x86)\Java\jdk1.8.0_102\bin\java" -cp "C:\Users\Krishna\Documents\Study\Miscellaneous\examples" "URIOpen" "%1"
When I try to run the command myDocs:http://google.com, I end up opening infinite command prompts.
The following is my URI schema entry structure in the registry. Any help on this?
Your solution end up opening infinite command prompts because of:
you registered the execution of the custom URIOpen class to be activated by the system when it has to deal with myDocs:'s scheme based URI;
when custom URIOpen class executes the line Desktop.getDesktop().browse(java.net.URI.create(uri)); the system will receive again an URI based on the same scheme ( myDocs: ) and it will activate again a new command to execute your class again and again and again ...
Probably you would like to change your code in someway like that:
try {
java.net.URI theURI = java.net.URI.create(uri);
// System.out.println(theURI.getScheme()); => myDocs
String uriBrowsablePart = theURI.getRawSchemeSpecificPart();
// System.out.println(uriBrowsablePart); => http://google.com
Desktop.getDesktop().browse(java.net.URI.create(uriBrowsablePart));
// the above statement will open default browser on http://google.com
} catch (IOException e) {
System.out.println(e.getMessage());
}
try replacing your try-catch block with my suggestion and see if it works as required.
I'm programming a simple rmi application, and I have a problem.
If I run the registry in the same directory, it works; but if I change the directory from which I run the registry, it does not.
The registry would work generically from another host, but only the change of directory stop his functionality.
I'm working on this problem by 3 days without solution, I change also every possible configuration of the codebase parameter but nothing.
I describe the situation and code with the directory:
fileserver.java :
`package testrmi2;
import java.rmi.*;
public interface fileserver extends Remote {
public void scrivifile(String nomefile, String arg) throws RemoteException;
}
`
fileserverimpl.java:
package testrmi2;
import java.io.*;
import java.rmi.*;
import java.rmi.server.*;
public class fileserverimpl extends UnicastRemoteObject implements fileserver{
public fileserverimpl() throws RemoteException {
super();
}
public void scrivifile(String nomefile, String arg) throws RemoteException {
try {
FileWriter myfile = new FileWriter(nomefile);
myfile.write(arg);
myfile.close(); }
catch (Exception e) {System.out.println(e);}
}
public static void main (String arg[]) {
try {
fileserverimpl s = new fileserverimpl();
if (System.getSecurityManager() == null) {
System.setSecurityManager(new RMISecurityManager());
}
String codebase = System.getProperty("classpath");
System.out.println("Trying to access code base: " + codebase+"\n\nuse is "+System.getProperty("useCodebaseOnly"));
Naming.rebind("//127.0.0.1:2005/fileserverimpl", s);
System.out.println("Server attivato.");
} catch (Exception e) {System.out.println("errore inizializzazione server\n\n"+e.getMessage()+"\n\n\n");
}}}
client.java:
package testrmi2;
import java.rmi.*;
import java.io.*;
public class client {
public static void main (String arg[]) {
fileserver myserver;
String nomefile=" ";
String testo=" ";
System.out.println("Scrivi il nome del file");
nomefile=ReadString();
System.out.println("Scrivi il testo");
testo=ReadString();
try {
myserver = (fileserver) Naming.lookup("//127.0.0.1:2005/fileserverimpl");
myserver.scrivifile(nomefile, testo);
} catch (Exception e) {System.out.println(e);}
}
public static String ReadString() {
BufferedReader stdIn =new BufferedReader(new InputStreamReader(System.in));
String s=" ";
try{
s=stdIn.readLine();
}
catch(IOException e) {System.out.println(e.getMessage()); }
return s;
}
}
and the policy file is:
grant {
// Allow everything for now
permission java.security.AllPermission;
};
all this files are on the directory:
/Users/franco/Desktop/prova
to compiling it I goes in the /Users/franco/Desktop/prova directory and do in terminal :
javac -cp . -d . *.java
rmic rmic testrmi2.fileserverimpl
jar cvf testrmi2.jar testrmi2/fileserver.class testrmi2/fileserverimpl_Stub.class
after I run registry in another terminal with the following commands but in another directory:
export classpath=""
rmiregistry 2005 &
Finally I would to run the filesereveimpl.class goes with terminal in the /Users/franco/Desktop/prova directory and write :
java -classpath /Users/franco/Desktop/prova/ -Djava.rmi.server.codebase=file:/Users/franco/Desktop/prova/testrmi2.jar -Djava.security.policy=testrmi2/policy testrmi2.fileserverimpl &
But the results are:
Trying to access code base: null
use is null
errore inizializzazione server
RemoteException occurred in server thread; nested exception is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: testrmi2.fileserverimpl_Stub
I also try to public he jar on a local webserver xampp and try to run with the following:
java -classpath . -Djava.rmi.server.codebase=http://127.0.0.1/testrmi2/ -Djava.security.policy=testrmi2/policy testrmi2.fileserverimpl &
or with :
java -classpath . -Djava.rmi.server.codebase=http://127.0.0.1/testrmi2.jar -Djava.security.policy=testrmi2/policy testrmi2.fileserverimpl &
but I have the same results.
Try to set the classpath var before to execute the rmregistry:
export classpath="/Users/franco/Desktop/prova/"
rmiregistry 2005 &
There are three cases.
You got that exception in the server when exporting/constructing the remote object. Solution: run rmic to generate the stub.
You got it in the server when binding/rebinding. Solution: make the stub class available to the Registry's CLASSPATH, or run the Registry in the server JVM via LocateRegistry.createRegistry().
You got it in the client, in lookup(). Solution: make the stub class available to the client's CLASSPATH.
These also apply to the remote interface itself, and any application classes it depends on, and so on recursively until closure.
Solution for stubs to all three: take the measures outlined in the Javadoc preamble to UnicastRemoteObject, so you don't need a stub at all.
I am trying a simple java class to test the functionality of jGit (see below).
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.storage.file.FileRepositoryBuilder;
import java.io.File;
import java.io.IOException;
public class CreateRepository {
public static void main( String[] args ){
Repository myrepo = createRepository("/mypath");
}
public static Repository createRepository(String repoPath) {
FileRepositoryBuilder builder = new FileRepositoryBuilder();
Repository repo = null;
try {
repo = builder.setGitDir(new File(repoPath))
.readEnvironment() // scan environment GIT_* variables
.findGitDir() // scan up the file system tree
.build();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return repo;
}
}
When i run this on Eclipse Indigo with latest jgit jar in my build path i get the error message "Need 2 arguments" - nothing else, no exceptions! :S
Thanks for any help in advance.
The only part of JGit which displays that error message is in the main() function of MyersDiff.
/**
* #param args two filenames specifying the contents to be diffed
*/
public static void main(String[] args) {
if (args.length != 2) {
System.err.println(JGitText.get().need2Arguments);
System.exit(1);
}
// ...
}
So check your classpath and make sure your project (and your main()) are before the jgit.jar, and that you don't somehow calls the wrong main().
First look into package org.eclipse.jgit.api.
The easiest start is from class Git:
// clone a repository
Git git = Git.cloneRepository().setURI("git://yourserver/repo.git").call();
// init a fresh new repository in the current directory
Git git = Git.init().call();
// open a repository on your disk
Git git = Git.open(new File("/path/of/repo");
Then explore the commands available on the git object you get
from these starting points.