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gLite Metadata implementation status

gLite Metadata implementation status. Tony Calanducci NA3: User Training and Induction, INFN CT Retreat between GILDA and ESR VO on gLite Bratislava, 27-30.06.2005. Basic Concepts. Entry/Item has a unique key and a list of attributes Attribute has name (string)

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gLite Metadata implementation status

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  1. gLite Metadata implementation status Tony Calanducci NA3: User Training and Induction, INFN CT Retreat between GILDA and ESR VO on gLite Bratislava, 27-30.06.2005

  2. Basic Concepts • Entry/Item • has a uniquekeyand a list of attributes • Attribute • has name (string) • has type (depends on backend, support for basic type) • belongs to a schema • Schemaisa group of different attributes • has a name • has an attributeList, which contains all the attributes that belong to the schema • Each catalog entry belongs to one or more schemas • Permission • a BasicPermission, which stores a username, groupname and permission numbers for the user, group members and others • a list of ACLs Retreat between GILDA and ESR VO on gLite Bratislava, 27-30.06.2005

  3. Interfaces • MetadataBaseTwo sets of operations are offered through this interface: • Querying and setting values of attributes for individual entries/items in the catalog. • Generic queries returning entry/item identifiers. • MetadataCatalog The necessary operations for managing entries in the catalog are available through this interface. This includes functionality for creating and deleting items. • MetadataSchemaThe necessary operations for handling schemas inside the catalog. • FASBaseThe set and get permission methods are inherited in MetadataBase from this interface. Retreat between GILDA and ESR VO on gLite Bratislava, 27-30.06.2005

  4. Actual Implementation • Fireman catalog implements MetadataBase and MetadataSchema, but in the actual release of gLite (1.1) it’s not working. It should be present in the next release. • Metadata Catalog as a standalone service is included in the actual release: • it exposes a WebServices based interface (http://egee-jra1-data.web.cern.ch/egee-jra1-data/glite-data_branch_1_1_1_RC1/stage/share/doc/glite-data-catalog-interface/html/org/glite/data/catalog/service/meta/package-summary.html) • but NO CLIs are available AT THE MOMENT Retreat between GILDA and ESR VO on gLite Bratislava, 27-30.06.2005

  5. What we tested • Schema creation using JAVA API • Install CLI for MetaData from gLite 1.2 Night builds • glite-meta-schema-list • glite-meta-schema-describe • glite-meta-create • glite-meta-setattr • glite-meta-getattr • glite-meta-remove Retreat between GILDA and ESR VO on gLite Bratislava, 27-30.06.2005

  6. Schema Creation String urlStr = "http://glite-mdc.ct.infn.it:8080/gilda/glite-data-catalog-service-meta/services/MetadataCatalog"; try { URL url = new URL(urlStr); MetadataCatalogServiceLocator metaLoc = new MetadataCatalogServiceLocator(); MetadataCatalog meta = metaLoc.getMetadataCatalog(url); Attribute[] attrs = new Attribute[2]; Attribute newAttr = new Attribute(); Attribute newAttr2 = new Attribute(); attrs[0] = newAttr; attrs[1] = newAttr2; attrs[0].setName("Name"); attrs[0].setType("VARCHAR(100)"); attrs[0].setValue("NoNameAtTheMomement"); attrs[1].setName("Age"); attrs[1].setType("Integer"); attrs[1].setValue("0"); meta.createSchema("AgeMeta", attrs); } catch (Exception e) { e.printStackTrace(); System.out.println("oh oh..something is going wrong!\n" + e.getMessage()); } Retreat between GILDA and ESR VO on gLite Bratislava, 27-30.06.2005

  7. beta CLIs Metadata interaction • DEMO Retreat between GILDA and ESR VO on gLite Bratislava, 27-30.06.2005

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