DIS-HLS-Client

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Revision as of 15:16, 19 March 2007 by Andrea (Talk | contribs) (Implentation Overview)

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Introduction

The DISHLSClient is a library that allows to execute queries into DIS-IC.

Implentation Overview

The DISHLSClient is a static class that allows to instance a Manager for each DILIGENT resource. Using Credentials or service EPR it is possible to instantiate the right Manager using it in the scope of a particular VO. The DISHLSClient allows to process a not predefined query using the method queryDISIC implemented in the GeneralQueryManager.

Usage Examples

ExtendedGSSCredential cred=null;
try {
       cred = ProxyUtil.loadProxyCredentials("certWithDLRoles");
} catch (IOException e) {
	e.printStackTrace();
} catch (GSSException e) {
	e.printStackTrace();
}
RunningInstanceManager riManager=null;
PropertiesManager pMan =null;
try {
	//null credential and null EPR
	riManager=DISHLSClient.getRunningInstanceManager(null, null);
        pMan= DISHLSClient.getPropertiesManager(cred, null);
} catch (DISHLSClientException e) {
       e.printStackTrace();
}
String test= null;
try {
       riManager.getEPRsRIFromClassAndName("InformationSystem", "DIS-Registry", "dililigentproject/informationservice/disregistry/DISRegistryFactoryService", null,null);
       test= pMan.getAllPublishedEntries(cred, null);
} catch (DISHLSClientException e) {
       e.printStackTrace();
} catch (DISHLSCredentialException e) {
       //community changed
       e.printStackTrace();
} 

How to adapt the existing xQuery to eXist 1.1

In the following examples are shown the necessary modifications to xQueries in order to make them compatible with eXist 1.1

  • the function text() is not supported:
  .../DILIGENTResource/UniqueID/text() eq 'id' ==> .../DILIGENTResource/UniqueID/string() eq 'id'
  
  • to keep an attribute value it must use the function string()
  .../Endpoint[@EntryName="*ENTRYNAME*"]  ==>  ../Endpoint[string(@EntryName) eq "*ENTRYNAME*"] 
 

--Andrea 14:08, 19 March 2007 (EET)