Prashant Sehgal

This might illustrate better:

Java Code:
public static void main(String args[]) { try { ProcessBuilder pb = new ProcessBuilder("c:/test_1.cmd"); Map<String, String> env = pb.environment(); Process p = pb.start(); BufferedReader br = new BufferedReader (new InputStreamReader(p.getInputStream())); String line = ""; while ((line=br.readLine())!=null) { System.out.println(line); } } catch (Exception e) { e.printStackTrace(); }

Cmd Script: test_1.cmd
start /separate test_2.bat

Bat Script:
echo "this is test 2"

I want my original program to return "this is test 2" in it's inputstream. Is it even possible?

The output is not getting redirected to the original terminal window. I anyway want the output to display in the a new terminal window and also to catch it in the Processes's inputstream. I'll check out the ProcessBuilder class and the article you mention as well.

But my original problem stands.

How to catch the inputstream from a new DOS window that has been created by "exec()ing" a .cmd script from within your java program.

Yes this is a Microsoft only deployment.

I have a .cmd file - say - with the following code:
echo "I am a command that produces a lot of text output"

I want to invoke this using Runtime.getRuntime().exec(.) and catch the "I am a command that produces a lot of text output" text in the InputStream being returned from the Process.

The problem is that I *must* start this command in a separate DOS window. In doing that, my program loses the handle to the stream and does not return any text from the command file.

So, how do I start the command in a separate window while still being able to catch all it's output in my Process's inputstream?

Hi,

It is said that through serialization one can persist the state of an object.

Q1- What about behaviour? When an object is serialized are only it's attributes persisited or are the methods also sent?

Q2- Adding/removing/modifying data type of an existing attribute will automatically update the serialVersionUId of the class. Will performing similar changes to methods also result in the same?

Thanks.

I still dont get it - cant the same thing be achieved by overriding readObject() and writeObject() of Serializable??

How are the fields delimited? Can you attach a sample .cer file?

So no replies means dumb question or dumb audience ...?

try calling pw.flush() before pw.close()

I know there've been plenty of discussion around this, but I could not find a satisfatory answer as to why Externalizable is really required.

I can achieve an extremely high level of customization by manually overriding readObject and writeObject methods of Serializable just as I can by overriding readExternal and writeExternal of Externaliable.

The sun documentation page on Externalizable says that...

Externalizable interface are implemented by a class to give the class complete control over the format and contents of the stream for an object and its supertypes

...but can't the same level of customization be gained by overriding Serializable?

Hi,

My connection factory is setup in my Jboss 4.0.4 server like this:

<tx-connection-factory> <jndi-name>jms/queue/ControlConnectionFactory</jndi-name> <use-java-context>false</use-java-context> <xa-transaction/> <rar-name>jms-ra.rar</rar-name> <connection-definition>org.jboss.resource.adapter.jms.JmsConnectionFactory</connection-definition> <config-property name="SessionDefaultType" type="java.lang.String">javax.jms.Topic</config-property> <config-property name="JmsProviderAdapterJNDI" type="java.lang.String">java:/DefaultJMSProvider</config-property> <max-pool-size>100</max-pool-size> </tx-connection-factory>

I'm accessing this from outside of Jboss, using a stand alone client with from it's main method like so:

public void initializeListener () { String url = "lonrs03004:1099"; Properties props = new Properties(); props.setProperty("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory"); props.setProperty("java.naming.factory.url.pkgs", "org.jboss.naming"); props.setProperty("java.naming.provider.url", url); try { Context ctx = new InitialContext(props); QueueConnectionFactory qConFactory = (QueueConnectionFactory) ctx .lookup("jms/queue/ControlConnectionFactory"); if(qConFactory == null) { System.out.println("qConFactory is null "); System.exit(0); } }

The connection factory is being returned as null. I read somewhere that this might be because my connection factory is setup using jboss-ra and in such cases standalone clients cant access connection factories. One needs to access them from inside the server.

a) Is this correct?
b) If I want to retain my stand-alone client, how should I setup my connection factories?

Thanks,
Prashant.
[ April 14, 2008: Message edited by: Prashant Sehgal ]

Ok - figured it out from elsewhere. From global benefit, this is how you do it in Jboss:

oracle-ds.xml ------------- <?xml version="1.0" encoding="UTF-8" ?> <datasources> <local-tx-datasource> <jndi-name>HelloWorld</jndi-name> <connection-url>jdbc:oracle:thin:@(description=(address_list=(load_balance=on)(failover=on)(address=(protocol=tcp)(host=host1)(port=1621))(address=(protocol=tcp)(host=host2)(port=1621)))(connect_data=(service_name=SID)(failover_mode=(type=select)(method=basic)))) </connection-url> <driver-class>oracle.jdbc.driver.OracleDriver</driver-class> <user-name>user</user-name> <password>password</password> </local-tx-datasource> </datasources>

Must mention here that I'm connection from within Jboss 4.0.4 like so:

<local-tx-datasource> <jndi-name>jdbc/HelloWorld</jndi-name> <connection-url>jdbc:oracle:thin:@[HostName]:[PORT]:[Instance]</connection-url> <driver-class>oracle.jdbc.driver.OracleDriver</driver-class> <user-name>user</user-name> <password>password</password> <min-pool-size>10</min-pool-size> <max-pool-size>20</max-pool-size> <!-- Uses the pingDatabase method to check a connection is still valid before handing it out from the pool --> <!--valid-connection-checker-class-name>org.jboss.resource.adapter.jdbc.vendor.OracleValidConnectionChecker</valid-connection-checker-class-name--> <!-- Checks the Oracle error codes and messages for fatal errors --> <exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.OracleExceptionSorter</exception-sorter-class-name> <!-- sql to call when connection is created <new-connection-sql>select sysdate from dual</new-connection-sql> --> <!-- sql to call on an existing pooled connection when it is obtained from pool - the OracleValidConnectionChecker is prefered <check-valid-connection-sql>some arbitrary sql</check-valid-connection-sql> --> <!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml (optional) --> <metadata> <type-mapping>Oracle9i</type-mapping> </metadata> </local-tx-datasource>

Yup there's the Oracle9i in the type-mapping, 10g doesn't seem to mind it.

Does anyone know if it's possible to connect to a 10g RAC database using the jdbc java thin client.

I'm currently connection to a single node using "jdbc:oracle:thin:@[HOSTNAME]:[PORT]:[INSTANCE]".

Now another node is being added to make it a RAC cluster, so now there would be two different HOSTNAMEs.

How do I connect to both?

Originally posted by Paul Campbell:
does the JBoss user have execute privilege on the stored procedure?

It seems he (username is MIGRATE) does have privileges to execute all procedures. Because

(a) The same code runs from a standalone JDBC connection for the same user;
(b) The same user is able to call another procedure, I wrote, that just inserts dummy data into a dummy table; and
(c) Here's what I can see from the user profile in the DB:

. . . / GRANT DEBUG ANY PROCEDURE TO MIGRATE / GRANT CREATE PROCEDURE TO MIGRATE . . .