Re: big text in string as object over the network: very strange?
I think the specification has declareted this but orion support the BLOB under CMP. See the database schema oracle.xml: type-mapping type=java.io.Serializable name=blob / this entry is a default! -Ursprüngliche Nachricht- Von: Simon Evans [EMAIL PROTECTED] An: Orion-Interest [EMAIL PROTECTED] Datum: Donnerstag, 21. Juni 2001 23:02 Betreff: RE: big text in string as object over the network: very strange? CMP Entity beans do not support CLOB and BLOB fields...neither 1.1 or 2.0 EJB Specification. you will need to use a Bean Managed Entity Bean and use the JDBC API with CLOB and BLOB. You save them and retrieve them as Streams rather than objects. -Original Message- From: Metla, Suri [mailto:[EMAIL PROTECTED]] Sent: Thursday, June 21, 2001 9:48 AM To: Orion-Interest Subject: RE: big text in string as object over the network: very strange? Are there any Data types in Java to access the Long and CLOB columns of the Oracle Database? The first bottleneck comes with the JDBC driver to map the Database columns of these types (BLOBS, CLOBS). Regards, Suri -Original Message- From: Tobias Streckel [mailto:[EMAIL PROTECTED]] Sent: Thursday, June 21, 2001 9:32 AM To: Orion-Interest Subject: Re: big text in string as object over the network: very strange? Very strange Okay, now I want to create a entity bean which have as attribute a object(this object have a only StringBuffer() object). The create method of the entity will be access from a session bean(in the same apps). The client have access on the session bean. If the session bean call the create method of the entity and the StingBuffer is small it will work. If the StringBuffer() containts a String about 200 KB it throws the message javax.ejb.CreateException: Error creating EntityBean: E/A-Exception: Connection reset by peer: socket write error If the String is bigger than 600 kb I will get the Message: com.evermind.server.rmi.RMIConnectionException com.evermind.server.rmi.OrionRemoteException: Disconnected: Disconnected WHAT HAPPENS´??? I HAVE NO ANSWER HOW I CAN GET IT TO WORK! THANKS! Tobi -Ursprüngliche Nachricht- Von: Tobias Streckel [EMAIL PROTECTED] An: [EMAIL PROTECTED] [EMAIL PROTECTED] Datum: Donnerstag, 21. Juni 2001 13:11 Betreff: Re: big text in string as object over the network: Hy, I want to save a file. In the database I have used a BLOB datatyp for the field. What kind of variable is used in the Entity Bean to save the File. Is it a java.io.File object? Thanks a lot by Tobi
RE: big text in string as object over the network:
AFAIK, the Oracle 1.2 jdbc driver has problems with clobs and blobs. They don't work. The oci drivers don't seem to have this issue, but that doesn't help you if you are using linux. You should try a simple servlet w/jdbc code Oracle database. Skip the ejb's in this step just to see if it is a driver problem. If this doens't work, you know what your problem is. Binary data is serialized with the Long Raw datatype as noted in the oracle-schema.xml. So if you have a cmp ejb, Long Raw would be used. You might try that in your datatype for the simple servlet test. regards, the elephantwalker -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Tobias Streckel Sent: Thursday, June 21, 2001 4:07 AM To: Orion-Interest Subject: big text in string as object over the network: Hello, if I want to save a String(he is in a object which will save in a Oracle DB as a BLOB) I get by huge texts a Error: com.evermind.server.rmi.RMIConnectionException com.evermind.server.rmi.OrionRemoteException: Disconnected: Disconnected Have anyone a answer why it doesn't work? Thanks Tobi
Re: big text in string as object over the network:
It dosn't work with a StringBuffer object. I will get the same error message, I think it was a connection problem - but I don't know what to do? Anyone a idea? -Ursprüngliche Nachricht- Von: Jens Stutte [EMAIL PROTECTED] An: Orion-Interest [EMAIL PROTECTED] Datum: Donnerstag, 21. Juni 2001 14:36 Betreff: AW: big text in string as object over the network: This may be related to an old Java problem, that strings over 65535 characters or so could not be serialized. I don't know, by when if ever it was fixed by Sun, but try using StringBuffer instead. If this works, you found the problem... Regards, Jens Stutte -Ursprüngliche Nachricht- Von: Tobias Streckel [mailto:[EMAIL PROTECTED]] Gesendet am: Donnerstag, 21. Juni 2001 13:07 An: Orion-Interest Betreff: big text in string as object over the network: Hello, if I want to save a String(he is in a object which will save in a Oracle DB as a BLOB) I get by huge texts a Error: com.evermind.server.rmi.RMIConnectionException com.evermind.server.rmi.OrionRemoteException: Disconnected: Disconnected Have anyone a answer why it doesn't work? Thanks Tobi
Re: big text in string as object over the network: very strange?
Very strange Okay, now I want to create a entity bean which have as attribute a object(this object have a only StringBuffer() object). The create method of the entity will be access from a session bean(in the same apps). The client have access on the session bean. If the session bean call the create method of the entity and the StingBuffer is small it will work. If the StringBuffer() containts a String about 200 KB it throws the message javax.ejb.CreateException: Error creating EntityBean: E/A-Exception: Connection reset by peer: socket write error If the String is bigger than 600 kb I will get the Message: com.evermind.server.rmi.RMIConnectionException com.evermind.server.rmi.OrionRemoteException: Disconnected: Disconnected WHAT HAPPENS´??? I HAVE NO ANSWER HOW I CAN GET IT TO WORK! THANKS! Tobi -Ursprüngliche Nachricht- Von: Tobias Streckel [EMAIL PROTECTED] An: [EMAIL PROTECTED] [EMAIL PROTECTED] Datum: Donnerstag, 21. Juni 2001 13:11 Betreff: Re: big text in string as object over the network: Hy, I want to save a file. In the database I have used a BLOB datatyp for the field. What kind of variable is used in the Entity Bean to save the File. Is it a java.io.File object? Thanks a lot by Tobi
RE: big text in string as object over the network:
You need to select the row for update, then open a stream and write the string by opening an output stream. I am including a link to the Oracle documentation: http://oradoc.photo.net/ora81/DOC/java.815/a64685/oraext4.htm#1043272 Hope it helps. -Atul -Original Message- From: Tobias Streckel [mailto:[EMAIL PROTECTED]] Sent: Thursday, June 21, 2001 8:13 AM To: Orion-Interest Subject: Re: big text in string as object over the network: It dosn't work with a StringBuffer object. I will get the same error message, I think it was a connection problem - but I don't know what to do? Anyone a idea? -Ursprüngliche Nachricht- Von: Jens Stutte [EMAIL PROTECTED] An: Orion-Interest [EMAIL PROTECTED] Datum: Donnerstag, 21. Juni 2001 14:36 Betreff: AW: big text in string as object over the network: This may be related to an old Java problem, that strings over 65535 characters or so could not be serialized. I don't know, by when if ever it was fixed by Sun, but try using StringBuffer instead. If this works, you found the problem... Regards, Jens Stutte -Ursprüngliche Nachricht- Von: Tobias Streckel [mailto:[EMAIL PROTECTED]] Gesendet am: Donnerstag, 21. Juni 2001 13:07 An: Orion-Interest Betreff: big text in string as object over the network: Hello, if I want to save a String(he is in a object which will save in a Oracle DB as a BLOB) I get by huge texts a Error: com.evermind.server.rmi.RMIConnectionException com.evermind.server.rmi.OrionRemoteException: Disconnected: Disconnected Have anyone a answer why it doesn't work? Thanks Tobi
RE: big text in string as object over the network:
Is there some sort of connection time out stuff on the Oracle server? Is there something on the Oracle server that kills connections after X seconds? Can you save another binary object of the same size as your String to the BLOB field? There is an inactivity timeout variable in the Orion datasources. Probably won't help you, but what happens if you change that from the default of 30 to something bigger? Good luck! Jason -Original Message- From: Tobias Streckel [mailto:[EMAIL PROTECTED]] Sent: Thursday, June 21, 2001 3:13 PM To: Orion-Interest Subject: Re: big text in string as object over the network: It dosn't work with a StringBuffer object. I will get the same error message, I think it was a connection problem - but I don't know what to do? Anyone a idea? -Ursprüngliche Nachricht- Von: Jens Stutte [EMAIL PROTECTED] An: Orion-Interest [EMAIL PROTECTED] Datum: Donnerstag, 21. Juni 2001 14:36 Betreff: AW: big text in string as object over the network: This may be related to an old Java problem, that strings over 65535 characters or so could not be serialized. I don't know, by when if ever it was fixed by Sun, but try using StringBuffer instead. If this works, you found the problem... Regards, Jens Stutte -Ursprüngliche Nachricht- Von: Tobias Streckel [mailto:[EMAIL PROTECTED]] Gesendet am: Donnerstag, 21. Juni 2001 13:07 An: Orion-Interest Betreff: big text in string as object over the network: Hello, if I want to save a String(he is in a object which will save in a Oracle DB as a BLOB) I get by huge texts a Error: com.evermind.server.rmi.RMIConnectionException com.evermind.server.rmi.OrionRemoteException: Disconnected: Disconnected Have anyone a answer why it doesn't work? Thanks Tobi
RE: big text in string as object over the network: very strange?
Are there any Data types in Java to access the Long and CLOB columns of the Oracle Database? The first bottleneck comes with the JDBC driver to map the Database columns of these types (BLOBS, CLOBS). Regards, Suri -Original Message- From: Tobias Streckel [mailto:[EMAIL PROTECTED]] Sent: Thursday, June 21, 2001 9:32 AM To: Orion-Interest Subject: Re: big text in string as object over the network: very strange? Very strange Okay, now I want to create a entity bean which have as attribute a object(this object have a only StringBuffer() object). The create method of the entity will be access from a session bean(in the same apps). The client have access on the session bean. If the session bean call the create method of the entity and the StingBuffer is small it will work. If the StringBuffer() containts a String about 200 KB it throws the message javax.ejb.CreateException: Error creating EntityBean: E/A-Exception: Connection reset by peer: socket write error If the String is bigger than 600 kb I will get the Message: com.evermind.server.rmi.RMIConnectionException com.evermind.server.rmi.OrionRemoteException: Disconnected: Disconnected WHAT HAPPENS´??? I HAVE NO ANSWER HOW I CAN GET IT TO WORK! THANKS! Tobi -Ursprüngliche Nachricht- Von: Tobias Streckel [EMAIL PROTECTED] An: [EMAIL PROTECTED] [EMAIL PROTECTED] Datum: Donnerstag, 21. Juni 2001 13:11 Betreff: Re: big text in string as object over the network: Hy, I want to save a file. In the database I have used a BLOB datatyp for the field. What kind of variable is used in the Entity Bean to save the File. Is it a java.io.File object? Thanks a lot by Tobi
RE: big text in string as object over the network:
We also had a similar problem and so far have not found any fix. I think the error is in the oracle driver but I'm not sure. Strings less than 4000 chars can be converted to binary and saved using a stmt.setBinaryStream() Strings over 4000 chars do not get saved. -Original Message- From: Jens Stutte [mailto:[EMAIL PROTECTED]] Sent: Thursday, June 21, 2001 4:49 AM To: Orion-Interest Subject:AW: big text in string as object over the network: This may be related to an old Java problem, that strings over 65535 characters or so could not be serialized. I don't know, by when if ever it was fixed by Sun, but try using StringBuffer instead. If this works, you found the problem... Regards, Jens Stutte -Ursprüngliche Nachricht- Von: Tobias Streckel [mailto:[EMAIL PROTECTED]] Gesendet am: Donnerstag, 21. Juni 2001 13:07 An: Orion-Interest Betreff: big text in string as object over the network: Hello, if I want to save a String(he is in a object which will save in a Oracle DB as a BLOB) I get by huge texts a Error: com.evermind.server.rmi.RMIConnectionException com.evermind.server.rmi.OrionRemoteException: Disconnected: Disconnected Have anyone a answer why it doesn't work? Thanks Tobi
