Method and system for bit streaming for data centric applications

• US 8,301,726 B2
• Filed: 12/21/2007
• Issued: 10/30/2012
• Est. Priority Date: 12/21/2007
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Wang, Steve
• Primary Examiner(s): Duong, Oanh
• Application Number:
  US11/962,144
• Publication Number:
  US 20090164515A1
• Time in Patent Office: 1,775 Days
• Field of Search: 709/223, 709/231, 709/246, 709/218, 707/602
• US Class Current: 709/218
• CPC Class Codes: G06F 16/972 Access to data in other repository systems, e.g. legacy data or dynamic Web page generation
• CPC Class Codes: G06F 8/36 Software reuse

Abstract

The present invention utilizes the main Java package (javax.jcr.binary) for saving the node property path and other relevant retrieving information within the serialized XML node files so that the intended large binary data remains inside the content repository while the corresponding node is being serialized. A data centric application which requires processing of the serialized XML node file can then deal with a much reduced sized XML file. This can improve the performance greatly in terms of memory usage and processing speed for XML processors such as DOM. During the consuming phase of the data centric applications, the binary data property is streamed from its source JCR repository into the target repository by looking up its original property path and other retrieving information.

Claims

1. A data transfer method comprising:

transferring data from a source Java Content Repository (JCR) to a target system, the transferring including serializing a source extensible markup language (XML) node schema including a plurality of nodes for the source JCR into a plurality of XML node files in a file system, each of the plurality of XML node files comprising a text file, at least one of the plurality of nodes comprising a binary node including binary data stored in the source JCR, the serializing including;

for each of the at least one of the plurality of nodes comprising a binary node including binary data stored in the source JCR, serializing an identifier indicating to the target system the node corresponds to a streaming property and a path enabling access by the target system to the binary data in the source JCR into a corresponding XML node file in the file system without serializing the binary data, wherein the binary data remains in the source JCR and remains external from all of the plurality of XML node files corresponding to the source JCR.

2. The method of claim 1, the serializing further including, for each binary node, serializing source server information for the binary data.

3. The method of claim 1, the transferring further comprising providing the plurality of XML node files for processing by the target system, wherein the target system comprises a data centric application.

4. The method of claim 3, wherein the data centric application comprises at least one of:

a target JCR, an archive and restore application, or a migration application.

5. The method of claim 3, the transferring further comprising:

receiving a request to stream the binary data for a binary node in an XML node file from the data centric application subsequent to the providing; and

streaming the binary data corresponding to the binary node from the source JCR for processing by the data centric application in response to the receiving.

6. The method of claim 5, wherein the data centric application comprises a target JCR, the method further comprising transforming the plurality of XML node files from a source application model to a target application model using the target JCR and a set of transform rules.

7. A system comprising:

a computer system including at least one computing device, the computer system for performing a data transfer method, the method comprising;

transferring data from a source Java Content Repository (JCR) to a target system, the transferring including serializing a source extensible markup language (XML) node schema including a plurality of nodes for the source into a plurality of XML node files in a file system, each of the plurality of XML node files comprising a text file, at least one of the plurality of nodes comprising a binary node including binary data stored in the source JCR, the serializing including;

for each of the at least one of the plurality of nodes comprising a binary node including binary data stored in the source JCR, serializing an identifier indicating to the target system the node corresponds to a streaming property and a path enabling access by the target system to the binary data in the source JCR into a corresponding XML node file in the file system without serializing the binary data, wherein the binary data remains in the source JCR and remains external from all of the plurality of XML node files corresponding to the source JCR.

8. The system of claim 7, the serializing further including, for each binary node, serializing source server information for the binary data.

9. The system of claim 7, the transferring further comprising providing the XML node file for processing by a data centric application.

10. The system of claim 9, wherein the data centric application comprises at least one of:

a target JCR, an archive and restore application, or a migration application.

11. The system of claim 9, the transferring further comprising:

receiving a request to stream the binary data for a binary node in an XML node file from the data centric application subsequent to the providing; and

streaming the binary data corresponding to the binary node from the source JCR for processing by the data centric application in response to the receiving.

12. The system of claim 11, wherein the data centric application comprises a target JCR, the method further comprising transforming the plurality of XML node files from a source application model to a target application model using the target JCR and a set of transform rules.

13. A program product stored on a computer readable device, the program product including program code for enabling a computer system to perform a data transfer method, the data transfer method comprising:

transferring data from a source Java Content Repository (JCR) to a target system, the transferring including serializing a source extensible markup language (XML) node schema including a plurality of nodes for the source JCR into a plurality of XML node files in a file system without serializing the binary data, each of the plurality of XML node files comprising a text file, at least one of the plurality of nodes comprising a binary node including binary data stored in the source JCR, the serializing including;

for each of the at least one of the plurality of nodes comprising a binary node including binary data stored in the source JCR, serializing an identifier indicating to the target system the node corresponds to a streaming property and a path enabling access by the target system to the binary data in the source JCR into a corresponding XML node file in the file system, wherein the binary data remains in the source JCR and remains external from all of the plurality of XML node files corresponding to the source JCR.

14. The program product of claim 13, the serializing further including, for each binary node, serializing source server information for the binary data.

15. The program product of claim 13, the transferring further comprising providing the XML node file for processing by a data centric application.

16. The program product of claim 15, wherein the data centric application comprises at least one of:

a target JCR, an archive and restore application, or a migration application.

17. The program product of claim 15, the transferring further comprising:

receiving a request to stream the binary data for a binary node in an XML node file from the data centric application subsequent to the providing; and

streaming the binary data corresponding to the binary node from the source JCR for processing by the data centric application in response to the receiving.

18. The program product of claim 17, wherein the data centric application comprises a target JCR, the method further comprising transforming the plurality of XML node files from a source application model to a target application model using the target JCR and a set of transform rules.